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Old 12-24-2008, 07:18 AM
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chevy 327 cam help

I have a 327 with 91/2:1 pistons and 202 heads, what is the highest lift and highest duration can I use for this combo. what Iam looking for is that extrem loppy idel, Thanks all

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Old 12-24-2008, 07:33 AM
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Quote:
Originally Posted by alle4901
I have a 327 with 91/2:1 pistons and 202 heads, what is the highest lift and highest duration can I use for this combo. what Iam looking for is that extrem loppy idel, Thanks all

Which pistons and which heads? 91/2:1 and 202 mean absolutely nothing. We need part numbers. Also what head gasket? What was your deck clearance?

What intake/carb are you running? What car is this going into, and what type of trans? If its an auto, waht stall? What is the tire size? What are the rear gears? What fuel do you plan on using?

Answer all of those and we'll get back to ya- without that information picking a good cam is like throwing darts with a blind fold on.
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Old 12-24-2008, 08:34 AM
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Crane Cams

Comp Cams

Howards Cams

Lunati Cams

Crower Cams

Here are links to 5 popular cam manufacturers. All are reputable and make a living by providing cams. I would highly recommend you contact them for recommendations. Good luck!
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Old 12-24-2008, 12:09 PM
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F-bird, you're rigth about the cam spec- that will be rough, but you know he won't like it since its not drivable.

You see these posts as often as I do, and 9 times out of 10 its a mostly stock sbc with a used random intake and a 600cfm holley. Running a stock stall on a TH350 with low 3's for gears (3.73 if you're REAL lucky). And he'll want atleast 12 mpg's...

Like I said- your answer's right but his question is most likely worded wrong.
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Old 12-24-2008, 01:07 PM
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Yea, I'm hesitant to think anyone who spec's heads by the intake valve size or the pistons as "91/2:1" can change a camshaft...

But we all start somewhere. He's probably better off running something like a 262 cam, and just pull the EVO way up when they grind it- like 12 degrees. It won't be optimal but it'll make a lot of noise and with the earlier IVC could probably live with a stock conv. and whatever compression he has.

My feelings are that you should atealst try to keep some dynamic compression even if you are going hog wild on the exhaust. There's no reason to give it 15 degrees more exhaust duration like a thumper cam- just advance the EVO by about 12 degrees and the IVC by about 4 from a better matched cam.

It'd probably run pretty well with a turbo at low RPM, but that's about al the cam would really be suited towards. That and making a lot of noise.
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Old 12-24-2008, 03:32 PM
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Quote:
Originally Posted by alle4901
I have a 327 with 91/2:1 pistons and 202 heads, what is the highest lift and highest duration can I use for this combo. what Iam looking for is that extrem loppy idel, Thanks all
I know i gave limited info, I just got int o the car thang but i did pro street harley motors for years so i have mechanical knowlege, just not the greatest with v8s, As for the motor for type of pistons, deck clearanc,e and heads other than stock cas iron heads ,i couldnt tell you cuz i didnt build it , carb is a holly 650 trans 400 auto 2400 stal, tires 20 x 18s in the rear , just trying to get by until I get the funds to build a 383 stroker for the ole 57 chevy truck. but thank you all for the advise, its much appreciated
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