Change down to third at Martinsville

In real life do the drivers change down to 3rd to get out of the turns at Martinsville. I find that to set 4th so I'm not over-reving at the end of the straights the engine is getting right down thru the turns and I feel that I can get back up to pace as quick if I stay in 4th. -- Nigel of Lakewood Motorsports Nascar Coruba & Coke Chevy Hamilton New Zealand

No. They use a gear ratio low enough to pull the rpms through the corners and then are near,or at, red-line at the end of the straights. The only time they change gears on an oval is on re-starts and pit stops.

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> In real life do the drivers change down to 3rd to get out of > the turns at Martinsville. I find that to set 4th so I'm not > over-reving at the end of the straights the engine is getting > right down thru the turns and I feel that I can get back up to > pace as quick if I stay in 4th. > -- > Nigel of Lakewood Motorsports > Nascar Coruba & Coke Chevy > Hamilton > New Zealand

Eddie, Not true on all ovals. Drivers at Pocono will downshift heading into 3. With that execption, you're 100% correct. Tom _______________________________________________________ Reverse the first two characters of my mail ID if you wish to send mail. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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> No. They use a gear ratio low enough to pull the rpms through the corners > and then are near,or at, red-line at the end of the straights. The only > time they change gears on an oval is on re-starts and pit stops. > > In real life do the drivers change down to 3rd to get out of > > the turns at Martinsville. I find that to set 4th so I'm not > > over-reving at the end of the straights the engine is getting > > right down thru the turns and I feel that I can get back up to > > pace as quick if I stay in 4th. > > -- > > Nigel of Lakewood Motorsports > > Nascar Coruba & Coke Chevy > > Hamilton > > New Zealand

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> In real life do the drivers change down to 3rd to get out of > the turns at Martinsville. I find that to set 4th so I'm not > over-reving at the end of the straights the engine is getting > right down thru the turns and I feel that I can get back up to > pace as quick if I stay in 4th. > -- > Nigel of Lakewood Motorsports > Nascar Coruba & Coke Chevy > Hamilton > New Zealand

No in real life nascar they dont down shift to 3rd at Martinsville.I believe the only tracks they down shift during racing is The Glen,Sears Point and Pocono. Paul Carillon http://members.aol.com/sschevy454 http://www.newreach.net/~racegm/hts http://www.wf.net/~raven001/rmr/rmrframe.htm

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> Eddie, > Not true on all ovals. Drivers at Pocono will downshift heading into 3. > With that execption, you're 100% correct. > Tom > _______________________________________________________ > Reverse the first two characters of my mail ID if you wish to send mail. > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > No. They use a gear ratio low enough to pull the rpms through the corners > > and then are near,or at, red-line at the end of the straights. The only > > time they change gears on an oval is on re-starts and pit stops. > > > In real life do the drivers change down to 3rd to get out of > > > the turns at Martinsville. I find that to set 4th so I'm not > > > over-reving at the end of the straights the engine is getting > > > right down thru the turns and I feel that I can get back up to > > > pace as quick if I stay in 4th. > > > -- > > > Nigel of Lakewood Motorsports > > > Nascar Coruba & Coke Chevy > > > Hamilton > > > New Zealand

actually they down shift to 3rd in turn 1 run the whole track in 3rd then right at the start finish line the shift to 4th until going into 1 again. with the long frontstreach they do it to make an overdrive -- Brian Motisko 717-876-5536 http://members.aol.com/bmotisko/private/index.htm

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> Eddie, > Not true on all ovals. Drivers at Pocono will downshift heading into 3. > With that execption, you're 100% correct. > Tom > _______________________________________________________ > Reverse the first two characters of my mail ID if you wish to send mail. > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > No. They use a gear ratio low enough to pull the rpms through the corners > > and then are near,or at, red-line at the end of the straights. The only > > time they change gears on an oval is on re-starts and pit stops. > > > In real life do the drivers change down to 3rd to get out of > > > the turns at Martinsville. I find that to set 4th so I'm not > > > over-reving at the end of the straights the engine is getting > > > right down thru the turns and I feel that I can get back up to > > > pace as quick if I stay in 4th. > > > -- > > > Nigel of Lakewood Motorsports > > > Nascar Coruba & Coke Chevy > > > Hamilton > > > New Zealand

actually they down shift to 3rd in turn 1 run the whole track in 3rd then right at the start finish line the shift to 4th until going into 1 again. with the long frontstreach they do it to make an overdrive -- Brian Motisko http://members.aol.com/bmotisko/private/index.htm

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> The way I remember it is, they downshift to 3rd entering turn 1, then > shift up to 4th as they're going down the second straightaway. Turn 2 > is very fast so their is no need to downshift. They remain in 4th > through turn 2 and the third and final straightaway, and then > downshift to 3rd entering turn 3. Of course 4th gear is used about > halfway down the front straight. > Not all the WC teams use the same gearing strategy anyway. I suppose > there are a few that use 3rd gear as their top gear all the way around > the track, and I seem to remember there being a few that use 4th gear > all the way around without any overdrive gear. > Kyle Langston

Actually, each team now uses the Jerico transmission at Pocono. This allows them to setup fourth gear as overdrive. The shift from 3rd to fourth is made as the car nears the start/finish line; then the drivers drop back into third at turn one, and stay there all the way around, until they reach the "dragstrip" again. Incidentally, the Jerico transmission is now being employed at several tracks (not just Pocono anymore), and some teams are counting on it exclusively for an entire season. God Bless, Steve

Hmmm.... I guess you don't define Pocono as an oval :-) I think the reason they don't do it at Martinsville is that they have enough power at 90 mph to break the rear end loose coming off the corner in 4th and have to feather the throttle anyway. So - no benefit to shifting. 150 mph at Pocono is a different story. bob

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> > In real life do the drivers change down to 3rd to get out of > > the turns at Martinsville. I find that to set 4th so I'm not > > over-reving at the end of the straights the engine is getting > > right down thru the turns and I feel that I can get back up to > > pace as quick if I stay in 4th. > > -- > > Nigel of Lakewood Motorsports > > Nascar Coruba & Coke Chevy > > Hamilton > > New Zealand > No in real life nascar they dont down shift to 3rd at Martinsville.I > believe the only tracks they down shift during racing is The Glen,Sears > Point and Pocono. > Paul Carillon > http://members.aol.com/sschevy454 > http://www.newreach.net/~racegm/hts > http://www.wf.net/~raven001/rmr/rmrframe.htm

I coulda swore they downshifted going into Turn 1 at Talladega? :-)

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> > > In real life do the drivers change down to 3rd to get out of > > > the turns at Martinsville. I find that to set 4th so I'm not > > > over-reving at the end of the straights the engine is getting > > > right down thru the turns and I feel that I can get back up to > > > pace as quick if I stay in 4th. > > > -- > > > Nigel of Lakewood Motorsports > > > Nascar Coruba & Coke Chevy > > > Hamilton > > > New Zealand > > No in real life nascar they dont down shift to 3rd at Martinsville.I > > believe the only tracks they down shift during racing is The Glen,Sears > > Point and Pocono. > > Paul Carillon > > http://members.aol.com/sschevy454 > > http://www.newreach.net/~racegm/hts > > http://www.wf.net/~raven001/rmr/rmrframe.htm > I coulda swore they downshifted going into Turn 1 at Talladega? :-)

No, at dega they don't even take their foot off the gas going into turn 1. "That's restrict plate racing." BTW, real life drivers don't shift down at Martinsville. Craig Jacobson

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> In real life do the drivers change down to 3rd to get out of > the turns at Martinsville. I find that to set 4th so I'm not > over-reving at the end of the straights the engine is getting > right down thru the turns and I feel that I can get back up to > pace as quick if I stay in 4th. > -- > Nigel of Lakewood Motorsports > Nascar Coruba & Coke Chevy > Hamilton > New Zealand

Having read all the other responses to this question, there is a point being missed: "Why is it helpful to downshift on the short tracks in N1 and N2, if the real WC drivers don't do it?" I believe the answer is that in the game we don't have to miss with a clutch. Just push a button and you're in a lower gear. Downshifting to 3rd in the game not only gives you better acceleration, but breaks the rear wheels loose, helping you exit faster without pushing. But in a real car, with a real clutch, downshifting, while trying to negotiate a tight turn and fighting a steering wheel that doesn't want to turn the way you are turning it, would be very slow and awkward. Also *** the drivetrain as a whole and the transmission specically. If anyone can add detail or insight to this explanation it will be appreciated. -- Ed "A friend of mine suggested I try America Online, I said 'But I already have a computer...'"

Except that most teams now use a Jehrico transmission, where a clutch is not necessary for shifting. The gears simply fall into place. The extra horsepower simply isn't needed. It's hard enough to keep the car straight with the spped coming out of turns in fourth. Wear and tear on the transmission is, I'm sure, a factor also. Craig Jacobson

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> > In real life do the drivers change down to 3rd to get out of > > the turns at Martinsville. I find that to set 4th so I'm not > > over-reving at the end of the straights the engine is getting > > right down thru the turns and I feel that I can get back up to > > pace as quick if I stay in 4th. > > -- > > Nigel of Lakewood Motorsports > > Nascar Coruba & Coke Chevy > > Hamilton > > New Zealand > Having read all the other responses to this question, there is a point > being missed: "Why is it helpful to downshift on the short tracks in N1 > and N2, if the real WC drivers don't do it?" > I believe the answer is that in the game we don't have to miss with a > clutch. Just push a button and you're in a lower gear. Downshifting to > 3rd in the game not only gives you better acceleration, but breaks the > rear wheels loose, helping you exit faster without pushing. > But in a real car, with a real clutch, downshifting, while trying to > negotiate a tight turn and fighting a steering wheel that doesn't want > to turn the way you are turning it, would be very slow and awkward. Also > *** the drivetrain as a whole and the transmission specically. > If anyone can add detail or insight to this explanation it will be > appreciated. > -- > Ed > "A friend of mine suggested I try America Online, I said 'But I already > have > a computer...'"

You are right. Pocono slipped my mind(I am kind of an old fart and mind-slipping is a common problem with me). I kinda put Pocono into its own little category anyway. It is an oval, with road course characteristics. Thanks for the correction anyway, Tom. -- Regards, Ed Medlin > Eddie, > Not true on all ovals. Drivers at Pocono will downshift heading into 3. > With that execption, you're 100% correct. > Tom > _______________________________________________________ > Reverse the first two characters of my mail ID if you wish to send mail. > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > No. They use a gear ratio low enough to pull the rpms through the corners > > and then are near,or at, red-line at the end of the straights. The only > > time they change gears on an oval is on re-starts and pit stops. > > > In real life do the drivers change down to 3rd to get out of > > > the turns at Martinsville. I find that to set 4th so I'm not > > > over-reving at the end of the straights the engine is getting > > > right down thru the turns and I feel that I can get back up to > > > pace as quick if I stay in 4th. > > > -- > > > Nigel of Lakewood Motorsports > > > Nascar Coruba & Coke Chevy > > > Hamilton > > > New Zealand

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> Actually, each team now uses the Jerico transmission at Pocono. This > allows them to setup fourth gear as overdrive. The shift from 3rd to > fourth is made as the car nears the start/finish line; then the drivers > drop back into third at turn one, and stay there all the way around, > until they reach the "dragstrip" again. > Incidentally, the Jerico transmission is now being employed at several > tracks (not just Pocono anymore), and some teams are counting on it > exclusively for an entire season.

Actually, everybody is a little bit right on this. Some of the drivers prefer to use the overdrive gear both on the main straight, and the Long Pond straight (the stretch between turns 1 and 2). Rusty Wallace does this, as well as some others. Then again, others employ the method above--using the overdrive gear only on the main straight. One year at the Brickyard, Mark Martin tried shifting on the long straights, but abandoned the idea the next year. So Pocono is the only "oval" where the drivers shift during a lap. Pat ----------------------------------------------------------------------------- Pat Campbell Sanctioning bodies should make rules, 6,94,88,16,4,33 Lexington, AL not design cars! War Eagle!!! Home Page: http://fly.hiwaay.net/~pscampbe/pscindex.html Scale Models: http://fly.hiwaay.net/~pscampbe/models.html -----------------------------------------------------------------------------

The clutch is never *needed* for shifting the Jehrico or Richmond transmissions, nor is it *needed* to shift your street car. (Except shifting into first from a dead stop.) The only purpose the clutch serves is to take up slight mismatches in RPM between the mainshaft and layshaft in the transmission. The reason it's easier on the Jehrico is that the dog gears are more widely spaced and are tolerant of a little more mismatch without rejecting the gear change and/or breaking. If you do it right, you can shift a street car without the clutch... ---Jim

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> >>Except that most teams now use a Jehrico transmission, where a clutch is > >>not necessary for shifting. The gears simply fall into place. > Depends what model you purchased.. I bought one a couple of years ago > for drag racing.. Costs 2500!! That's w/o the clutch assembly and > bellhousing!! > >The clutch is never *needed* for shifting the Jehrico or Richmond > >transmissions, nor is it *needed* to shift your street car. (Except > >shifting into first from a dead stop.) > Again, depends what version of the transmission.. They are derived > from the T-10 .. FORD > >The only purpose the clutch serves is to take up slight mismatches in > >RPM between the mainshaft and layshaft in the transmission. The reason > >it's easier on the Jehrico is that the dog gears are more widely > >spaced and are tolerant of a little more mismatch without rejecting > >the gear change and/or breaking. > Which you mean.. "sliders".. > >If you do it right, you can shift a street car without the clutch... > I have .. on a T-5 and T-56

I can shift w/o the clutch on my Honda Accord, 5-speed. Up or downshifts, upshifts are easier in general, but downshifts "fall right into place" if I match the revs right. Since I match revs when I downshift anyway, whether I use the clutch or not, I can usually get 'em right. -- Ed "A friend of mine suggested I try America Online, I said 'But I already have a computer...'"

When I actually spoke to Harry Gant (He made an appearance when I went to the June Pocono race in '95) I asked him about shifting at Pocono, and he implied that (at least he) only used 4th gear between the start/finish line and turn 1. --John Melair They're not bugs! They're random features! ------------------------------------------------------ Sorry, but to try to get away from all the damn spammers, I had to change my email information, like everyone else. reply to johnm973 (at) voicenet.com, thanks

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>>Except that most teams now use a Jehrico transmission, where a clutch is >>not necessary for shifting. The gears simply fall into place. >The clutch is never *needed* for shifting the Jehrico or Richmond >transmissions, nor is it *needed* to shift your street car. (Except >shifting into first from a dead stop.) >The only purpose the clutch serves is to take up slight mismatches in >RPM between the mainshaft and layshaft in the transmission. The reason >it's easier on the Jehrico is that the dog gears are more widely >spaced and are tolerant of a little more mismatch without rejecting >the gear change and/or breaking. >If you do it right, you can shift a street car without the clutch... >---Jim

I had a 84 Pickup with a stick (it was a Nissan) and the dealer told me it had a "syncromesh" transmission, which he told me it would be extremely difficult to grind the gears. As I never drove a stick before, It wasn't that ***ce in a while! :D Never really tried to shift without clutching though... --John Melair They're not bugs! They're random features! ------------------------------------------------------ Sorry, but to try to get away from all the damn spammers, I had to change my email information, like everyone else. reply to johnm973 (at) voicenet.com, thanks

Julian, I miss the days of the old crash boxes! Think I still have a T-10 with some teeth missing from the sychro's(on purpose) out in the garage. Nothing quite beats the rush of bang shifting a 4 gear! Pete

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> Again, depends what version of the transmission.. They are derived > from the T-10 .. FORD > >The only purpose the clutch serves is to take up slight mismatches in > >RPM between the mainshaft and layshaft in the transmission. The reason > >it's easier on the Jehrico is that the dog gears are more widely > >spaced and are tolerant of a little more mismatch without rejecting > >the gear change and/or breaking. > Which you mean.. "sliders".. > >If you do it right, you can shift a street car without the clutch... > I have .. on a T-5 and T-56 > Julian "Mr. Turtle" Data > IVGA Member 0004 > The N2 "SkunksWorks" is in progress > Verite/3DFX owner

This is a multi-part message in MIME format. ------=_NextPart_000_01BC504D.0F6655C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The VW "Beetle" was/is one of the easiest cars in which to gear change = without using the clutch....match the revs correctly after a bit of = practice and the lever just shifts like a hot knife through butter! I = once drove almost 200 miles like this (country highway at about = 4:00AM...so no need to stop!) after the clutch operating rod broke. -- Bruce. "....and unless I'm very much mistaken.....and I AM very much = mistaken....." (Murray Walker) Vegemite Racing: = http://www.netspeed.com.au/brucek/vegemiteracing/index.htm Stunned Mullet: = http://www.netspeed.com.au/brucek/stunnedmullet/index.htm=20 ------=_NextPart_000_01BC504D.0F6655C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML 3.2//EN"> <HTML> <HEAD> <META content=3Dtext/html;charset=3Diso-8859-1 = http-equiv=3DContent-Type> <META content=3D'"Trident 4.71.0544.0"' name=3DGENERATOR> </HEAD> <BODY><FONT face=3D"Comic Sans MS" size=3D2>The VW &quot;Beetle&quot; = was/is one of=20 the easiest cars in which to gear change without using the = clutch....match the=20 revs correctly after a bit of practice and the lever just shifts like a = hot=20 knife through butter! I once drove almost 200 miles like this (country = highway=20 at about 4:00AM...so no need to stop!) after the clutch operating rod = broke.<BR> --<BR> <HTML><BODY><FONT size=3D2>Bruce.<BR> <BR> &quot;....and unless I'm very much mistaken.....and I AM very much=20 mistaken.....&quot;<BR> (Murray Walker)<BR> Vegemite Racing: <A=20 href=3D"http://www.netspeed.com.au/brucek/vegemiteracing/index.htm">http:=//www.netspeed.com.au/brucek/vegemiteracing/index.htm</A><BR> Stunned Mullet: <A=20 href=3D"http://www.netspeed.com.au/brucek/stunnedmullet/index.htm">http:/=/www.netspeed.com.au/brucek/stunnedmullet/index.htm</A>=20 </FONT></FONT> </BODY></HTML> ------=_NextPart_000_01BC504D.0F6655C0--

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> >>Except that most teams now use a Jehrico transmission, where a clutch is > >>not necessary for shifting. The gears simply fall into place. > >The clutch is never *needed* for shifting the Jehrico or Richmond > >transmissions, nor is it *needed* to shift your street car. (Except > >shifting into first from a dead stop.) > >The only purpose the clutch serves is to take up slight mismatches in > >RPM between the mainshaft and layshaft in the transmission. The reason > >it's easier on the Jehrico is that the dog gears are more widely > >spaced and are tolerant of a little more mismatch without rejecting > >the gear change and/or breaking. > >If you do it right, you can shift a street car without the clutch... > >---Jim

btw- My Ford Asset class toured Mark Martin's shop about a year ago and got to watch his transmission guy rebuild a Jericho transmission. The gears are straightcut, with big, fat, rounded teeth, so it's easy to see how you could just shove it into gear w/o the clutch. Regular (street car) transmissions on the other hand, have helical cut, smaller, sharper teeth (makes it unlikely to slip out of gear). -- Ed "A friend of mine suggested I try America Online, I said 'But I already have a computer...'"

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> On Tue, 22 Apr 1997 23:22:19 -0400, Ed Benson > >I can shift w/o the clutch on my Honda Accord, 5-speed. Up or > >downshifts, upshifts are easier in general, but downshifts "fall right > >into place" if I match the revs right. Since I match revs when I > >downshift anyway, whether I use the clutch or not, I can usually get 'em > >right. > >-- > >Ed > >"A friend of mine suggested I try America Online, I said 'But I already > >have > >a computer...'" > When I was first learning how to drive a manual transmission, I nearly > stripped the gears by letting the clutch out to much before getting > the gear shift lever completely into the gear slot. I couldn't > imagine attempting to move the shifter around without depressing the > clutch first. > Kyle Langston

I'm not going to try to go into the details of why this is so, but once you engage the clutch, if you then let it out before the gears are fully meshed they will ALWAYS grind. However, if you haven't engaged the clutch at all, the gears will either slip into place, or if the speeds are off, you will have too much resistance to bring the gears together at all. (Unless you REALLY jam 'em, in which case they will grind.) -- Ed "A friend of mine suggested I try America Online, I said 'But I already have a computer...'"

On Sat, 26 Apr 1997 00:33:17 -0400, Ed Benson >btw- My Ford Asset class toured Mark Martin's shop about a year ago and >got to watch his transmission guy rebuild a Jericho transmission. The >gears are straightcut, with big, fat, rounded teeth, so it's easy to see >how you could just shove it into gear w/o the clutch. >Regular (street car) transmissions on the other hand, have helical cut, >smaller, sharper teeth (makes it unlikely to slip out of gear). The helical cut on the gears doesn't do much of anything but reduce noise in a passenger car transmission. (Speaking of synchromesh transmissions only here, which is probably 100% of the passenger car transmissions since 1965 or so... :-) ) The gears, with the exception of reverse, are in constant mesh with their counter-part gear, but the gears on one of the shafts are not connected torsionally to the shaft until the shift fork engages the synchros, locking that gear to the shaft, completing a "circuit" through the gearbox. The differences in shifting under load with mismatches of RPM is a matter of what type of engagement mechanism is used, be it synchros (in your street car), or wide spaced dog gears (in a WCup Jericho transmission.) These bit are located on the inner face of the gear, and are moved about by the shift forks in case you're looking for them in a cross-section or cut-away in a textbook. The "big fat rounded teeth" are for strength (due to reduced stress concentrations), but not for ease of shifting... ---Jim Sokoloff

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> On Sat, 26 Apr 1997 00:33:17 -0400, Ed Benson > >btw- My Ford Asset class toured Mark Martin's shop about a year ago and > >got to watch his transmission guy rebuild a Jericho transmission. The > >gears are straightcut, with big, fat, rounded teeth, so it's easy to see > >how you could just shove it into gear w/o the clutch. > >Regular (street car) transmissions on the other hand, have helical cut, > >smaller, sharper teeth (makes it unlikely to slip out of gear). > The helical cut on the gears doesn't do much of anything but reduce > noise in a passenger car transmission. (Speaking of synchromesh > transmissions only here, which is probably 100% of the passenger car > transmissions since 1965 or so... :-) ) > The gears, with the exception of reverse, are in constant mesh with > their counter-part gear, but the gears on one of the shafts are not > connected torsionally to the shaft until the shift fork engages the > synchros, locking that gear to the shaft, completing a "circuit" > through the gearbox. > The differences in shifting under load with mismatches of RPM is a > matter of what type of engagement mechanism is used, be it synchros > (in your street car), or wide spaced dog gears (in a WCup Jericho > transmission.) These bit are located on the inner face of the gear, > and are moved about by the shift forks in case you're looking for them > in a cross-section or cut-away in a textbook. > The "big fat rounded teeth" are for strength (due to reduced stress > concentrations), but not for ease of shifting... > ---Jim Sokoloff

Hey Jim, My transmission kablammed this week...wanna drop by for a couple of hours on Saturday? :) God Bless, Steve

> The helical cut on the gears doesn't do much of anything but reduce > noise in a passenger car transmission. (Speaking of synchromesh > transmissions only here, which is probably 100% of the passenger car > transmissions since 1965 or so... :-) ) Hate to dissapoint you here Jim but helical-cut gears DO reduce noise. In-fact they were invented for that purpose along with reduced wear. I've driven the same passenger car with both a syncromeshed helical cut gearbox and straight cut / close-ratio syncromeshed 'box. The noise-level's are totally difference. The h/c 'box sounds "normal", while the s/c 'box "whines" like and open-wheel racecar. Ever watched the BTCC or NATCC on TV ? Well if you get a chance to see some in-board camera shot - pay close attention. Most of the noise you'll hear Is the "whineing" (sound) from the transmission. Helical cut gears do also "steal" more hp than a straight cut layout. On my racecar a switch to a helical cut 'box would mean a 5-7% loss in power-output. This however do vary depending upon whilch 'box you use, what type of engine and drive you got (FWD,RWD,4WD) etc. A "dog-box" would reduce the power loss even more. -- Ed_ - Norway "Early on, the cars were getting faster and faster. And with good reason: everybody was cheating." - Richard Petty

On 30 Apr 1997 17:12:08 GMT, "Edwin Solheim" >> The helical cut on the gears doesn't do much of anything but reduce >> noise in a passenger car transmission. >Hate to dissapoint you here Jim but helical-cut gears DO reduce noise. >In-fact they were invented for that purpose along with reduced wear. I'm not disappointed at all... I see that you agree with me. :-) My statement is that helical-cut gears don't do anything EXCEPT reduce noise. In fact the helical cut reduces efficiency due to thrust loading and slightly increases bearing complexity. I agree whole-heartedly that it does reduce noise though... ---Jim

Also, a lot of the noise is also caused by timing "gear drive" rather that a timing chain system. It really makes noise. I have a gear drive in my old 63 ford unibody pickup, converted to Chevy small-block. Noisy sucker. Need help in gearing Jim. Swap you a great bass fishing outing on Table Rock Lake if you want to help. <g>..............Thanks for your help here in the ng........Later. -- Regards, Ed Medlin > On 30 Apr 1997 17:12:08 GMT, "Edwin Solheim" > >> The helical cut on the gears doesn't do much of anything but reduce > >> noise in a passenger car transmission. > >Hate to dissapoint you here Jim but helical-cut gears DO reduce noise. > >In-fact they were invented for that purpose along with reduced wear. > I'm not disappointed at all... I see that you agree with me. :-) > My statement is that helical-cut gears don't do anything EXCEPT reduce > noise. In fact the helical cut reduces efficiency due to thrust > loading and slightly increases bearing complexity. I agree > whole-heartedly that it does reduce noise though... > ---Jim

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> I'm not disappointed at all... I see that you agree with me. :-) > My statement is that helical-cut gears don't do anything EXCEPT reduce > noise. In fact the helical cut reduces efficiency due to thrust > loading and slightly increases bearing complexity. I agree > whole-heartedly that it does reduce noise though... > ---Jim

Then, please accept my deepest appologies for misunderstanding your post!! -- Ed_ - Norway "Early on, the cars were getting faster and faster. And with good reason: everybody was cheating." - Richard Petty