360 magnum budget build

DartFred said

So how much of a cam can the magnum heads take without changing valve springs and retainers? I played a little bit with comp cams Camquest software and the best power I got with a nice flat torque curve was with their 20-604-9 cam (210-220@0.050, .512 lift on a 112 lsa)

They also have 20-624-9, same specs but with .480 lift.

Comp says those 2 cams can't use stock springs...

I don't really want to start investing in the stock heads. If I have to change springs and retainers, I might as well go straight with the EQ 2.02 magnum heads.

Click to expand...

You really just need a standard set of EQs or RHSs with the 1.92 valve, I bought my set of RHSs from hughes for 935.00 shipped, now they have gone up around 50.00 bucks, but they are really great heads, with the standard boss .500 lift is pushing it, so .480/.485 is fine, I did what your wanting to do & was very happy, I just used a junkyard 360 shortblock & these up-grades.

RHS heads
Re-ground factory cam i had bullet do for me.- .477/.477, .218/.218 @50 on a 112.
Crosswind RPM
Summit 1.5/8 headers
Mallory 6AL, MSD dist.
PTC 11" 2800 stall
Spooled 3.73 gears
27" MT DRs
Shifted at 5100

Ran 12.5s @ 105 consistantly, 8.0s @ 85 1/8 NA

On a 125 shot ran 7.4s @ 95 with issues, All other nitrous passes it wouldn't hook.

Check out the video in my sig. against a 69 Yenko 427 Camaro, This was a NA run.