2013年3月30日 · So I've done a bunch of research on throwing an L31 Vortec motor (96+) into a 95 OBS and bolting up the GM Performance manifold that converts the standard TBI to the …

2022年10月17日 · The 87 through 95 TBI cop cars got a roller cam with 180/194 .050 duration with .392/.401 inch of lift at the valve with a 109degree LSA. The L31 Vortec roller cam times …

2013年12月13日 · There are marine intakes as well that use the TBI injection with L31 intake ports/bolt pattern. Even if you threw a Performer RPM Vortec intake with a TBI adapter on it …

2016年2月10日 · I have a new crate L31 engine, Muncie 4-speed, and plan on upgrading the valve springs, spring seats, guide bosses for a higher lift cam. Probably going to use a ZZ4 …

2023年8月11日 · L31 cam specs: .414/.428" lift, 191/196° duration at .050", 111° LSA. The stock TBI cam is laughably lame. If you're buying a junkyard motor, why not just aim for a Vortec …

2020年11月19日 · There are some GM roller cams that are quite compatible in a 350 with Vortec heads and a original GM TBI. The cam the L31 comes with is 255/190*degrees intake with …

2012年6月10日 · I've posted a screen shot of the modifications (compare changes) I did to tune a L31 Vortec with a stock roller cam using stock TBI Heads and a stock TBI Intake. The original …

2020年5月22日 · The car is currently lowered and has been swapped to a 1998 Tahoe L31 engine hooked to a T5 5 speed manual. The engine is currently being fed by a dual plane …

2023年4月10日 · Just rebuild the TBI in the Yukon or try and find a decent TBI to swap in. Or, since the Yukon is just a mountain camper, forget about it and enjoy the mosquito repellant …

2016年11月5日 · The L31-R will require a vortec style intake, or you will have to re use your TBI heads. Its pretty common to use a Vortec Carb style intake and use an adapter to mount your …