Install an electric fan and controller.į. Make sure there are no restrictions in the exhaust system – particularly the cat.Į. If the engine detonates, retard accordingly, although I think that 14* will be fine.ĭ. Advance timing to approximately 12* to 14* base timing.
#TBI PERFORMANCE MODS MANUAL#
You can also install a manual fuel pressure regulator for increased pressure.Ĭ. Bore the intake openings and install a larger TBI assembly. Parts are available on ebay for small pesos.ī. The bad thing is it also effectively reduces your engine’s performance.Ī cold air intake will improve combustion.Ī. This effectively reduces detonation and NOX emissions. Higher than that will take away from the upper RPM's and may cause detonation (ping).ĮGR of course puts inert gas into your cylinders. The theoretical hot spot of a 2.8 is 14* advance at base timing for low end torque and HP. There are a few companies that make headers for the 60* engine.Īdding a little timing advance can add some torque in the bottom end sacrificing very little in the top. The exhaust gas slams into the abrupt enlargement or "log" of the manifold and in turn causes quite a restriction. Manifolds usually only have 2-4 inch runners. This is why headers make such an improvement over manifolds. Basically the less restriction, the easier it is for the exhaust to expel itself and makes the motor work a lot less to push exhaust out. Exhaust: The stock exhaust is restrictive. The Holley 390 CFM /Edelbrock intake is another good option. Holley did make a 400 CFM TBI to put in place of the Stock 235CFM TBI and of course, the 4.3 TBI and boring the manifold is the best TBI improvement.
The throttle body should also be on the list of upgrades. There aren't many aftermarket manifolds available, but a longer duration cam makes ALOT of difference in intake flow. Although it is more expensive than exhaust, it is easier to design your intake to accommodate future exhaust upgrades than it is to design your exhaust for future intake upgrades. It is best to improve your intake before your exhaust. Intake: The intake manifold of TBI motors is very restrictive. The stock cam duration is very short for low end power but doesn’t allow the engine to breathe well)ġ. (One of the best things you can do to these engines is getting an aftermarket or GM performance cam. The lift and duration is so weak, it produces a poor power band and doesn’t help when power adders are installed. The first issue is the factory camshaft in all of the S10 2.8s is JUNK (as far as performance is concerned). Torque ( ) Įngine Description (LB6) 2.8L 60 degree V6 (TBI)ĭuration at. Since I have seen so many threads about wanting to improve power in the 60*, maybe I can offer some tips on helping these engines perform better.Įngine Description (LB6) 2.8L 60 degree V6 (Carbureted)
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