Breakup at about 4500
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Teching In
Joined: May 2021
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Breakup at about 4500 So I’m new to these engines and mainly drag race my truck but we had just swapped in an 01 Silverado motor and put the summit stage 4 cam in with new springs, pushrods, injectors, and a holley terminator x computer. First couple events it ran great with only some minor tuning adjustments and then out of nowhere it started to slow down and break up to the point where now under wot I can’t even make it past 4500 without letting it breaking up and dying until I lift off the pedal. Ran through checking wires, swapped o2, checked plugs, valve springs, and fuel filters. I have some data logs ill find out how to throw in here but any advice would be appreciated before I send it out to be gone through
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Teching In
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TFS-2500286P These are the springs that were installed. Just checked to make sure the rockets were tight today it all seemed fine. But the coils are still from the motor when I got it. I’ll have to take my daily’s coils for a test
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Thanks. I should have asked a better question, although I'm glad you've checked compression already. Have you tried shooting a squirt of oil into the lower reading cylinders to see if they improve? if that works, it typically indicates ring wear.
The question I was actually asking is what is your static compression ratio?
The question I was actually asking is what is your static compression ratio?
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Teching In
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Fixed issue yes I actually did. It ended up being some pretty clogged injectors. Even though the fuel system was pretty much all new. My injectors were maxing out the duty cycle but afr was dead lean. Confused me for a while
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Wow! Thanks for the reply man! Glad you got it figured out. It’s funny that is actually where I was leaning because I have checked everything else on the car. Just get new ones? Or clean the oldies out? Thanks again man.
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Teching In
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Injector issue so one of the guys at my work knew I guy with and injector tester and the tools to clean them. He ended up just swapping out my baskets because it looked almost like they had sand in them it was weird. But they tested fine after and have worked ever sense so it’s worth a try to check them. Hope this helps out
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