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#1
06-27-2013, 04:36 PM
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crower cam
I have a crower cam. Its a 60919 cam. Im wondering how this would work in a 400 bored .030 with the 8 eyebrow reliefs pistons. Im using a set of 670 unported heads with log manifolds. Quadajet intake and carb. Not sure how far the pistons are down in the hole. I know its not a lot of info but its all I know.
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#2
06-27-2013, 04:46 PM
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Very poor choice for any 400 engine unless you have at least 10.5 to 1 compression, 11 or more would be better, a LOT of converter and at least 3.73 gears. That cam is a near duplicate of the original 041 grind, 304/314 duration, 231/240 @ .050", and 113LSA. Even in a 455 in needs at least 9.5 to 1 compression to be effective, and vacuum will still be pretty "low" below 1000rpms........Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#3
06-27-2013, 04:46 PM
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Poor cam choice for that engine combo in my opinion, the log manifolds will choke it.
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#4
06-27-2013, 05:08 PM
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Great cam for the right scenario-just not yours!
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My money talks to me-it usually says goodbye! |
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#5
06-27-2013, 08:23 PM
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"I dont get it either. Having been a Pontiac guy for 27+ years and had at least 15 Pontiacs, one with 536,000 miles on it now and 3 engines later, having a non ported 400 doing mid 12s in a 3810 lb car and being president of a 200 member Pontiac club for two years and being alot of their go to guy to fix their cars, I just dont get it. I have heard and witnessed the infamous RA IV cam in a smog 400 more than once. It sounds good but wont do crap on a low compression motor."
http://www.jalopyjournal.com/forum/s....php?p=5587716 .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#6
06-27-2013, 09:42 PM
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Forgot to mention. This is a 4 speed car with 3.08's. What would be the compression on this engine?
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#7
06-27-2013, 09:49 PM
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Quote:
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#8
06-27-2013, 11:32 PM
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Guestimate on compression ratio - 9.25 to 9.5:1 due to the large volume of the 8 relief pistons that are likely .030 down in the hole.
Either the Summit 2801 cam or the Pontiac 068 cam would be a decent choice. |
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