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  #16 (permalink)  
Old 04-23-2009, 04:29 PM
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wouldn't a 750 cfm carb be a bit overkill for a 327 with a cam not meant to go over 5500 rpm, i would think you would stick closer to 600 cfm maybe 650

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Old 04-23-2009, 05:36 PM
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on the rod ratio, i called joe sherman many years ago, and one of the things he said were " rod ratio doesn't matter, i've made 600 hp with those chickensh@t 400 (5.65) rods". it sounds good on paper, but doesn't show up on the dyno.
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Old 04-23-2009, 06:21 PM
How fast is fast enough?
 
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Quote:
Originally Posted by 454C10
270H has 224/224 at 0.050"

260H has 212/212 at 0.050"

Dart or AFR heads will easily out power stock gm heads of that time period. Porting stock heads makes no sense unless you do it yourself. And I don't think the guy in a head porter. Just buy good heads and move on.

I wasn't trying to imply the 270H is a bad choice, its a good one for this type of street combo- though there are other equally as good ones for a little cheaper if you look hard enough.

And the head recomendation was assuming he not only ported the heads himself, but also redid the seals, installed the valves and springs, and cleaned them- basically everything but cut the new valve seats (I realize most people are not set up for that). It was a strict budget build. If you're going to drop $1500 on heads (as opposed to my $350 version which beats even VOrtecs by a long shot as far as power/dollar) then those are by far better choices than porting stock castings. I was shooting for low end hyper pistons (thoguh check for right comp ht), a possibley used intake (RPM's are everywhere), a budget cam, a used rebuilt carb, and cheap painted headers.

Hell if the block was in nice enough shape he could even hone it himself.

Otherwise I'd go a whole different route.
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  #19 (permalink)  
Old 04-23-2009, 06:23 PM
How fast is fast enough?
 
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Quote:
Originally Posted by roknroy
on the rod ratio, i called joe sherman many years ago, and one of the things he said were " rod ratio doesn't matter, i've made 600 hp with those chickensh@t 400 (5.65) rods". it sounds good on paper, but doesn't show up on the dyno.

It does matter in very finely tuned engines. It really affects cylinder filling and rotating weight among other things, but sometimes a shorter rod may be better. In all reality though it does not make enough difference on the street to worry about.
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