> > >I was wondering if there are any good books out there that talk about turbo
> > >charging on high compression (10:1 and above) v8's.
> > I think that would be a very short book. Page two would say BOOM!
> I would think so too, unless you ran *really* low on the boost, to the
> point where you'd get more power by changing the cam or some other
> fairly simple mod, even low boost engines from the major manufacturers
> run between 8:1 and 9:1 I believe, like SAAB
Sounds right to me - I run fairly high compression in my
Z (there is a simple head changeover which gets you better
than 10:1 on the L28) and I've been told I would have to
get my compression back to at least 9:1 in order to install
an aftermarket turbo. You just can't force enough high
pressure into a high compression engine - you'd get detonation
and then start breaking rods and/or bearings.
You'll also find that head design is a little different on
factory turbos as the swirl and airflow needs to be different.
I did hear one story about some weenie with a WRX and full
aftermarket engine rebuild/motec injection and adjustable
boost. Decided to be foolish one day and cranked up boost
to 22psi without sufficient fuel. Suffice to say he put
some very symmetrical holes in his block as the broken rod
got slammed around the crank at 5000rpm. ***. The
mechanic who told me the story still has the broken piston
in his workshop.
My previous car - a 300zx turbo was in the 8:1 range with
relatively low boost, as was a turbo Starion I had a few
years ago. High compression and forced induction don't
mix well unless you have an incredibly strong motor.
iksteh