RPM limit of a stock 99 head?
#21
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Location: Meridian, Mississippi
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Interesting side note. With MS3 is the tachometer driven by the MS3? I ask because Data logs show tachometer to be accurate at idle, and my rev limiter is currently set at 7200 and that is where it kicks in on my tachometer... but data logs showed only 7000 when limiter kicked in.
If the car wasn't torn apart for my BEGi S6 installation I would go out and data log speed vs RPM (steady state runs vs quick run through gears like most of my logs) to see what I could dig up.
Later,
Keith
#22
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Join Date: Jul 2005
Location: Anacortes, WA
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What the 8600 rpm rev limit is for is autocross. Its way past the power band but it allows me to reach high enough top speed without shifting and yet I have a gear that I have instant throttle and boost response coming off any slow mid or high speed autocross corner in second gear. The initial acceleration is way more important for autocross than running it out past the bulk of the powerband. It’s been working real well for me this year I should have planned to go to Lincoln my Pax performance against national level drivers this year says I should be in the mix at the top. I'm contemplating focusing on autocross next year seeing how far I can go.
#23
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Unfortunately this time the head needs to come off. Pretty sure combustion gasses are making it from the combustion chamber to the water jacket under load I don’t think it’s going through the head gasket. Combustion chamber had seen enough force to knock a hole in a piston. Rods and rod bearings looked fine however.
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