Apparently there are two LT4 cams. There is the LT4 HOT Cam, 218 / 228 Duration@ 0.050, Hydraulic Roller Camshaft and the Chevy LT4, 203/210 Duration @ 0.050, Hydraulic Roller Camshaft. From the SDPC information the not Hot cam is a better street cam. Does anyone have any real world experience with either of both of these.

I am building a smog street motor using modified Vortec heads, SLP runners and manifold.

Thanks

Jim

 

Where in California are you? I have the LT4 HOT cam, and let me tell you its not a mild cam. It requires a custom chip and valvetrain mods to be sure the heads can handle the lift. The other LT4 cam came stock in the 96 LT4 Corvette engine. Its a nice mild cam for a daily driver you want a little more power out of, but not for racing. And it doesnt require a custom chip. I think the best cam for the Vortec heads would be the ZZ4. It has a nice long exhaust duration, where the Vortec heads need the help. But again with its high lift the heads have to be setup for it.

 

What are the lift numbers on the Hot LT4???

 

.492 I/E with 1.5 rockers and .525 I/E with 1.6.