2.4 superchaged/turbocharged guys going over 12psi! look here
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From: S. Easton, Ma
interesting to know. I was under the impression the L61/LE5/LSJ all share a cam grind, and just utilize different timing. I know this is the case at least for the L61/LSJ.
The stock valves would be able to take more boost at lower RPMs though right? Im just thinking if you keep a stock redline (or maybe 7000rpm) and run higher boost (SC boost, since turbo boost will yield higher combustion pressures, working against the valve), you can pull it off. I know a few local guys running some small pulley'd M62's on a stock motor making abut 18-19psi daily with no issues.
Anyway, thanks for a technical reason
Thanks Gene for backing me by the way. You make me happy to help everyone
And a note to the people in this thread...i got my new car, and holy ****, RWD is SOOOO much more fun. I didnt think the differences in traction would be THAT huge.. 350hp with no wheelspin whatsoever even with super short gearing.
/offtopic
The stock valves would be able to take more boost at lower RPMs though right? Im just thinking if you keep a stock redline (or maybe 7000rpm) and run higher boost (SC boost, since turbo boost will yield higher combustion pressures, working against the valve), you can pull it off. I know a few local guys running some small pulley'd M62's on a stock motor making abut 18-19psi daily with no issues.
Anyway, thanks for a technical reason
Thanks Gene for backing me by the way. You make me happy to help everyone
And a note to the people in this thread...i got my new car, and holy ****, RWD is SOOOO much more fun. I didnt think the differences in traction would be THAT huge.. 350hp with no wheelspin whatsoever even with super short gearing.
/offtopic
I'm still a stick n00b
At 6k rpm around 15psi my engine starts to lean out and it's hard to gain rpm. Feels like ****. Loads of misfires. I was told it my fuel pump not providing enough pressure. Good fuel pump. It held 60psiunder wot. So when I get the money together I'm gu na be pickin up the fuel reference thing to raise the pressure
Casey, no problem.
I had the 2004 GTO and it was a really fun car to drive. I was lucky to get it on a 24 month lease from GM for $108 per month, so I had a lot of fun. I wasn't weighed down by the payment at all, lol. It was one of my favorite cars.
I had the 2004 GTO and it was a really fun car to drive. I was lucky to get it on a 24 month lease from GM for $108 per month, so I had a lot of fun. I wasn't weighed down by the payment at all, lol. It was one of my favorite cars.
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From: S. Easton, Ma
ill be running just the BRFPS on about 10-11psi and we'll see what it puts down, 300wheel and id be happy, thats a 40whp increase over my old supercharger setup at the same PSI
definitely. sadly, i already have dreams of supercharging the GTO now. lol. I guess i have a boost addiction.
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From: Grand Rapids, MI
Stock valve springs are only around 50-55lbs on the seat. For ease of explanation, if there is 1 square inch of surface area where boost is pushing down on the intake valve as it tries to close and 12psi in the intake manifold, then you have effectively dropped your seat pressure down to 38-43lbs and the valve can launch off the rocker at peak lift or bounce off the seat as it closes at high RPMs. The numbers aren't exact because there is always vacuum or pressure numbers below the intake valve which would need to be considered, and I haven't actually measured how much surface area of the valve is subject to manifold air pressure trying to push it open. It is merely meant to explain that boost does have an affect on valvespring performance.
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From: Ohio
Stock valve springs are only around 50-55lbs on the seat. For ease of explanation, if there is 1 square inch of surface area where boost is pushing down on the intake valve as it tries to close and 12psi in the intake manifold, then you have effectively dropped your seat pressure down to 38-43lbs and the valve can launch off the rocker at peak lift or bounce off the seat as it closes at high RPMs. The numbers aren't exact because there is always vacuum or pressure numbers below the intake valve which would need to be considered, and I haven't actually measured how much surface area of the valve is subject to manifold air pressure trying to push it open. It is merely meant to explain that boost does have an affect on valvespring performance.
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