![]() ![]() Makes tuning the stock system much easier, even with a custom tune. So MATCH the cam to the RPM range the heads are capable of supporting and you can make bigtime torque in a usable RPM range.Īnd, like was said above, keep the LSA rather wide- 112* or wider. No, it's not going to scream on the top end, but nothing can help those heads once the tach swings much past 4500-5000. 050 on the intake side) and will belt out low-midrange torque like nobody's business. ![]() ![]() 050 would actually be pretty big compared to the stock cam (which is 191*. An old school single pattern cam of mild duration, or a cam with only a mild split between intake and exhaust druation will actually work quite well for that reason. What I'm saying is that the swirlie heads actually have an excellent Intake/Exhaust flow ratio- around 75% or higher, even though the overall flow potential is not very high. First off, the TBI heads have a pretty bad intake port (swirl port) but a fairly decent exhaust port (ever bit the equal of Vortec heads, much better than non-swirl-port heads of the same vintage). If you have to go flat tappet, I'd make a few suggestions. You can even use the stock springs with them up to about 5000 RPMs. If you can go roller with the block, definitely consider a used LT1 roller cam. ![]()
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