(GPL) tire tep/pressure

First, I can't stand F1 in GPL. I feel I'm way too bissy shifting, braking, steering, shifting braking, steering, ect.. ect.. to enjoy the competition. Monza is the only track out of all of them availible that gives me at least some enjoyment of the competition and where driving is a bit more of a joy. In F3 and F2 w/ F3 engine gives me the best of everything. I've just done a PB of 1:27.88 in the F1 Eagle at Monza. After several practice session laps I came to a stop after the S/F line (without screatching the tires) and took a look at the tires. Each tire has equal temp.'s across the tire, each tire is at 25lbs hot. The rears are identical to each other at 242*F, The LF is at 230 and the RF is at 225. What is the ideal temp.s and ideal pressures for each wheel? I can lower the rears by maybe as much as 10*F with little sacrifice in proformance but not knowing what the Ideal temp is I don't want to do that yet.

Mike Barlow <[email hidden]> wrote: > temp.'s across the tire, each tire is at 25lbs hot. The rears are identical > to each other at 242*F, The LF is at 230 and the RF is at 225. What is the > ideal temp.s and ideal pressures for each wheel? 25lbs hot... and lo, I'm twelve inches more heavy. (identify THAT quote!) ;) The ideal pressure is when the middle temperature of a tire matches the tire's outside and inside temperature. It's described in the Bib..,uhm, in Steven Smith's book. As for ideal temperature, is there such a thing? There's no way for us to control the temperature so it's not feasible to ponder over it. > I can lower the rears by maybe as much as 10*F with little sacrifice in > proformance but not knowing what the Ideal temp is I don't want to do that > yet. So if your tire temps are at 7000 degrees and you're clocking 3:12 laps at Spa, you'll sacrifice thirty seconds of lap times to reduce temperature? Better yet, you can keep the tires at 20 centigrade by turning off the engine and staying still. You should optimize your driving for speed, and nothing else. (except consistency, but let's not get pedantic) +Cinquo [36.xx]

Mike, Wait a *minute*!!! Yer doing 1:27s at Monza with a F3 engine in a F2?!?!?!? Quick--get me Chip Ganassi on 2!!! Anyway, there *is* an ideal tire temp, but Papy never said what it was. Under 150 deg. the tires are pretty slippery (check the temps at the S/F after yer out lap; that should be abt. the min.), and at over 300, we're talkin' hot snot on a glass door knob (F1s at, say, Homestead). My guess is 180 to 220 is optimum. You don't have to bring the car to a stop, unless yer online. In Training mode, just hit Esc. and winkel yer way back to the garage. Nor do you have to be anywhere near the S/F line. If you think the Curva Grande is the key corner @ Monza, then hit Esc. just afterwards and you'll get a 'snapshot' of what yer tires were doing while you were in the CG. (At some tracks, like Zandy, the tires will have cooled off somewhat between the last turn and the S/F. At others, like the O'ring, the tires are probably still too hot at the S/F from the last corner.) For slightly more traction, the middle temp can be a deg. cooler than the outer & inner (good at slow tracks like Monaco and Sears Pt.). For slightly less rolling resistance, the middle temp can be 1 or 2 deg. warmer (good on fast corners and ovals like Indy & Pocono). If you can't get the inners and outers even, err on the side of hotter inners for more camber thrust (which I *hope* I covered in the book). "Bissy"? "Screatching"? Are you in the same school system as my kids? --Steve Smith Mike Barlow <[email hidden]> wrote in message news:oI066.5713$[email hidden]...

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> First, I can't stand F1 in GPL. I feel I'm way too bissy shifting, > braking, steering, shifting braking, steering, ect.. ect.. to enjoy the > competition. Monza is the only track out of all of them availible that > gives me at least some enjoyment of the competition and where driving is a > bit more of a joy. In F3 and F2 w/ F3 engine gives me the best of > everything. > > I've just done a PB of 1:27.88 in the F1 Eagle at Monza. After

several > practice session laps I came to a stop after the S/F line (without > screatching the tires) and took a look at the tires. Each tire has equal > temp.'s across the tire, each tire is at 25lbs hot. The rears areidentical > to each other at 242*F, The LF is at 230 and the RF is at 225. What isthe > ideal temp.s and ideal pressures for each wheel? > > I can lower the rears by maybe as much as 10*F with little sacrificein > proformance but not knowing what the Ideal temp is I don't want to do that > yet. > >

>My guess is 180 to 220 is optimum. According to Carol Smith optimum is between 220*F and 250*F. TJ

"Stephen Smith" <[email hidden]> wrote in message news:OQ366.5992$[email hidden]... > Mike, > > Wait a *minute*!!! Yer doing 1:27s at Monza with a F3 engine in aF2?!?!?!? > Quick--get me Chip Ganassi on 2!!! um.. er.. yes! with a bit of nitro ;-) I don't like F1 because of what I mentioned in that post. These tire temps are from an F1 Eagle though. Monza is the only place where F1's are ok (to me) to drive. > > Anyway, there *is* an ideal tire temp, but Papy never said what it was. > Under 150 deg. the tires are pretty slippery (check the temps at the S/F > after yer out lap; that should be abt. the min.), and at over 300, we're > talkin' hot snot on a glass door knob (F1s at, say, Homestead). My guessis > 180 to 220 is optimum. I remember someone saying 180 but that was quite some time ago. And with the information being tossed around and updated and changed on almost a regular bassis, I don't know what the optimum temps would be. Looks like I'll have to soften the rear or raise the car a bit to cool the tires. > > You don't have to bring the car to a stop, unless yer online. In Training > mode, just hit Esc. and winkel yer way back to the garage. Nor do youhave > to be anywhere near the S/F line. If you think the Curva Grande is thekey > corner @ Monza, then hit Esc. just afterwards and you'll get a 'snapshot'of > what yer tires were doing while you were in the CG. (At some tracks, like > Zandy, the tires will have cooled off somewhat between the last turn andthe > S/F. At others, like the O'ring, the tires are probably still too hot at > the S/F from the last corner.) > > For slightly more traction, the middle temp can be a deg. cooler than the > outer & inner (good at slow tracks like Monaco and Sears Pt.). Forslightly > less rolling resistance, the middle temp can be 1 or 2 deg. warmer (goodon > fast corners and ovals like Indy & Pocono). If you can't get the innersand > outers even, err on the side of hotter inners for more camber thrust(which > I *hope* I covered in the book). > > "Bissy"? "Screatching"? Are you in the same school system as my kids? > Maybe I should have said that I knew all of that. Been racing online since early Hawaii (95 or 96?) with papy products and 98 with papy's GPL. And the snap shot I made here was online so I had to come to a stop. At the S/F the outer edges have had time to cool off and with braking with the camber the insides have heated or haven't cooled as fast as the outer. I knew by screatching to a halt that the temps would be screwy so I came to a controled easy stop. even then There's a bit of a temp difference extanging. With the tires being equal across the tire/tires I know the out side edge of the out side tires were hotter then the inside and middle while going through the turns, but the car feels almost perfect so.... I just had to find out what the optimums should be so I can attempt a better and longer lasting setup. Thanks Steve,

TJ, That's Carroll--not Carol--Smith (no relation). In the real world (or in ICR/CR), the optimum temps depend on the compound (lower temps work better for softer rubber). Carroll is also probably talking about a later era (his heyday was in the 1970s). Real-world 1967 tires tended to be rock-hard, thus demanding higher temps, but my experience with the game tells me that lower temps offer a better purchase. The question not asked was, What's the optimum *hot* tire pressure, assuming you can equalize temps across the tread? Empirical evidence suggests 24-27 lbs. (lower for more grip, higher for more sidewall stability--apparently modeled in the game--and lower rolling resistance, for a higher Vx). --Steve Thomas JS Brown <[email hidden]> wrote in message news:[email hidden]... > >My guess is 180 to 220 is optimum. > > According to Carol Smith optimum is between 220*F and 250*F. > > TJ

Mike Barlow <[email hidden]> schreef in berichtnieuws oI066.5713$[email hidden]... > What is the ideal temp.s and ideal pressures for each wheel? Sorry for using metric values, but in my experience the tyres are starting to lose grip when running at 125* Celsius or more. Anything below that seems OK. Bye, Leo