Thread: Cam choice for sbc
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11-05-2007 09:58 AM #1
Cam choice for sbc
Looking for advice on cam choice.
Currently, running vortec heads with Comp Cam oval springs and roller tip rockers, a Comp Cam XE262 cam, headers, edlebrock aluminum dual-plane intake with JET stage II Q-jet carb, Petronics billet HEI distributor, and Keith Black hypernuematic 10:1 pistons, and balanced to 6500 rpm.
I run a manual 5-speed transmission with a 3.43 posi rearend.
This is a daily driver and a lot of fun.
I want more horsepower and not concerned with gas mileage or idle quality.
Should I run a single pattern cam or dual pattern cam?
Looking around the 280 duration and 480 lift.
Thanks for the advice!!!
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11-05-2007 02:46 PM #2
use the 280-h comp cam !!!!!
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11-05-2007 05:07 PM #3
I understand!
You like the single pattern profile cam.
What is the advantage on the street and what might I be giving up?
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11-05-2007 05:43 PM #4
These are stock re-man vortec heads with beehive springs.
I'm currently running the Comp Cam XE262 cam but want more than this mild cam. Got the headers/exhaust with 5 speed manual tranny and 3.43 posi out back - but want more! Don't usually go over 5500 rpm. Gas mileage and idle quality doesn't matter.
Dual pattern or single pattern AND what are the advantages/dis-advantages?
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11-05-2007 05:47 PM #5
Originally Posted by 18436572
I would always try and favor the exhaust by 6 to 8 degree's.
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11-05-2007 05:56 PM #6
Great advice!
Any particular favorite grind?
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11-05-2007 06:01 PM #7
Originally Posted by 18436572
Make sure you have your valve springs checked.
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11-05-2007 07:36 PM #8
brand new Comp Cam beehive springs.
any advice on a good dual pattern cam?
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11-06-2007 07:05 AM #9
284 Duration with 480 lift it a very popular grind for mild street. It has very nice sound... I sold lot of that cam back in the 80'S and 90'S. That Grind was by General Kentic now I don't know who bought out the GK Cam.
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11-06-2007 07:23 AM #10
Thanks for that advice Racecar!
Now I am tossed between two cams:
272/282 442/465 OR
282/292 465/480 ??
Crower Cams call a 284 duration cam an Ultra High Performance strip cam and you use terms like mild street. I consider the Comp Cams 262XE cam a mild street cam.
So you think I'll be OK on the street with a manual tranny with a 284 cam???
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11-06-2007 10:31 AM #11
I would go with this cam if you put 1.6 rocker on Intake side.
272/282 442/465
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11-06-2007 12:00 PM #12
Thanks for the reply
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11-06-2007 12:39 PM #13
I would put it in advance at 4°
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11-07-2007 06:51 AM #14
Thanks racecar for all the advice. I will advance the cam 4 degrees but will keep the rockers all the same. I plan to do this the weekend after thanksgiving and will post my results shortly after that.
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11-07-2007 07:23 AM #15
Originally Posted by 18436572
Some of the Comp cams already have 4* of advance built in to them.
I will guess he wants to advance it to move the power-band down a little or compensate for timing chain stretch.
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance