[CamaroDreams76]

Originally Posted by CC BOY

Thanks man! I definitely need to re-check my lifters. If my mod shop can’t measure lifter length, I might have to go your route…

I also wanted to ask about the fuel system. My tuner told me that without cutting pistons, it would be pushing the limits, and he recommended upgrading and optimizing my fuel system (injectors, ignition coils, and fuel rail). Do I really need to upgrade? I recall the stock L99 injectors are 42 lb/hr. Based on my target of 480–490 hp and the requirements for E85, that’s already very close to their limit. So if upgrading is really necessary, are there any recommended brands or part numbers? It’s been tough finding reliable info around here.

Also, my use case is track-focused, especially stop-and-go style circuits. I don’t run endurance races, but I do frequently hit high RPM. With zero tolerance for knock, is it still possible to reach my target power?

I looked into the 4500-stall torque converter you mentioned earlier, but I found a potential issue: paired with a BTR stage 4 camshaft, it seems like it won’t lock in 1st or 2nd gear because temps would spike too quickly? Not being able to lock 2nd on track might be pretty annoying… Would a 4300-stall converter be better? At least on a ~1:50 per lap circuit, I could use locked 2nd occasionally. I already have an independent oil cooler, transmission cooler, and an oversized aluminum radiator. Any suggestions? Thanks!

I had to upgrade to 660cc injectors when I did heads/cam and E. Ignition coils are fine and so are fuel rails. Im at 800whp on E with triple in tank pumps on factory fuel rails and factory coils.