I really doubt the 4/7 swap will add any power on a small street cam, the 4/7 swap will sound a little different. Howard’s retrofit HR cams use a stock distributer gear, which is nice. I think they are usually Sadi cores, which is not so nice, it is why they are priced cheaper and can run that stock gear. We have a pretty big .4” lobe Howards in an engine running .640” lift.
The 702 Lunati is a nice mild street cam in a 400 with 9 ish compression. With a HR cam the engine can run a bigger cam and not loose idle quality versus HFT. Would be pretty easy to gain 30 or 40 HP over a 702 by using a bigger HR cam and not loose any bottom end. Something like the 280/290 Howard’s, seems like they are 227*/237*@.050 on a 112 LSA? I can’t remember the lift, mid .550s I think.
I wouldn’t mess with the LS7 lifters. I mocked a couple up, and was not impressed. But suite yourself.
Last edited by Jay S; 11-05-2024 at 12:02 AM.
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