Cam shaft question 496

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rost495
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Cam shaft question 496

Postby rost495 » Sun Feb 10, 2019 1:24 pm

The short of the story, bought a 496 some years ago, built. Can't find the builder anymore. It was for a Camaro IIRC. Got a decent deal.

Have the 454 crater on me. I'm moving to AK in 1.5 months and found out can't get high octane fuel easily so swapping parts on the 496 to get compression down to around 9.5 and AL heads.
Since I"m this far, how do I know I have the right camshaft? It would be easy to swap right now while waiting on flat top pistons to get here.

This was over 600 HP engine but higher compression, I"ll loose some HP obviously, but the old crate 454 would run some dry so I think I'll still be ok.

Camshaft I have a spec sheet on the crane camp, part number 139651. Don't know what all the numbers mean.

Any input on a good carb to toss on top is welcome too.

Looking for Brodix AL heads about 110-112 CC open chambers IIRC puts me around the low 9s on compression, should be safe enough with the 87 octane fuel thats mostly available.

rost495
Site Supporter - III
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Posts: 2331
Joined: Wed Dec 12, 2007 8:30 pm
Location: La Grange, TX

Re: Cam shaft question 496

Postby rost495 » Sun Feb 10, 2019 1:41 pm

I do have the dyno sheet from the engine from before I started to swap parts, it shows peak torque at to hit 595 at 4900. At 6000 rpms it was down to 528 torque but up from 555 HP to 603 HP. Peak HP was 615 at 6053 rpms.

Although it seems a note on there was at 36 on timing and thats a bit high to my thinking, but again I"m just capable of swapping parts, my motor knowledge is basically nothing.


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