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Chevrolet Corvette Forum : “What kind of HP do you get with the LT4 hot cam kit and heads, 58mm TB, Edelbroc...”
What kind of HP do you get with the LT4 hot cam kit and heads, 58mm TB, Edelbrock manifold, Hooker headers, Borla Exhaust, 32 lb injectors and a slight increase in compression?
I've been told many things but I just made mods on my LT 1 engine. They included the LT4 hot cam kit with heads, gone from 52 mm TB to 58mm TB, went from 24 lb. injectors to 32 lb. injectors, Edelbrock manifold, Hooker headers, Borla exhaust and a slight bump up in stock compression. What kind of HP should I expect at the rear wheel? I was told by several Vette motor builders that the LT4 hot cam kit alone will pump out 430 HP at the crank and with the additional mods I will make well over 475 HP. What is the real HP I will make? Thanks in advance
its too hard to say really. i mean if you go get it dyno tuned you will probably be able to get 475hp+. without a dyno tune im guessing its right around 450 hp. nice mods though. exactly the same ones i would have done myself
My LT1 with your same mods, but with stock LT1 heads yielded about 350HP at the wheels on a Mustang dyno, and you'll find that a lot more than most people get. That was with a 6 speed and a 13lb flywheel, so driveline losses are likely 12-15% max, so that's about 400 at the crank. You are correct that adding the LT4 heads will get you to about 425HP range (crank). How much compression are you looking to add? I don't see the extra 45HP coming from that, nor the throttle body and injectors. If you ported the heads and went with a larger cam, maybe. Trouble is 475HP is a lot of power and it takes a bit of work and cash to get there with 350 cubic inches.
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