Intake CL for ZL-1 cam

[VintageMusclecar]

That cam (180) was never intended to be used with a restrictive exhaust system--I'm sure GM "assumed" anyone checking the L88/ZL1 box on the option list would be installing headers before the engine even finished cooling off from the first drive home.

The addition of headers makes it a whole different ball game--and even then, there's definitely better bumpsticks out there--have been for a long time.

Perfect example of "bigger isn't always better".

[John Brown]

When I said straight up on the 375 cam, I meant installed right out of the box, no degreeing. He later had the cam degreed and moved it to 4 degrees advanced. That produced so much low end that the car kept blowing the tires off. Cure was to retard the cam back to where it had been originally. For the record, the 375 cam was a TRW/Federal Mogul/Sealed Power (whichever name they were using at the time) replacement part, not a GM original.

[1971ls6]

I race a pure Stock zl1 camaro, the exhaust manifolds are the limiting factor in the Cam. Run a 114 straight up, you need to kill low end to get it to leave without blowing the tires off.

Look no further than the L88 Cam. The ZL1 has to much duration for the manifolds.

Btw, I went 6/10ths faster by going to an automatic

[WILMASBOYL78]

Originally Posted by VintageMusclecar

That cam (180) was never intended to be used with a restrictive exhaust system--I'm sure GM "assumed" anyone checking the L88/ZL1 box on the option list would be installing headers before the engine even finished cooling off from the first drive home.

The addition of headers makes it a whole different ball game--and even then, there's definitely better bumpsticks out there--have been for a long time.

Perfect example of "bigger isn't always better".

I was waiting for Eric to jump in...follow his advice