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Old 01-20-2012, 05:33 PM   #1
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Default Blower Cam

Hey fellas,

I have a buddy who has a forged 5.3 with 243 heads making 10.4:1 in his truck with a mp112 on top. He wanted a blower cam and was pointed to a Comp LRB289 HR114, which he then bought. This cam specs out at 239 243 .624 .624 on 114. This cam belongs in a 400-ish cu.in engine, not? He wants to run a 2200 stall in front of an 80e. I attempted the idle tune on it last night and am having some difficulty already... Is there going to be much under the curve here with this setup?
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Old 01-20-2012, 05:55 PM   #2
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Wow that's alot of cam....
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Old 01-21-2012, 08:10 AM   #3
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Thats what im thinking...way too much cam for boost i believe. I think he should call TSP or something and talk to them guys.


What about a Z06 cam supposed to be a great budget boost cam? WAY cheaper.
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Old 01-21-2012, 09:03 AM   #4
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That's WAY too much cam for a 5.3L (or 6.2L for that matter). I have one in the for sale section that would play nice with even a stock converter. Probably make as much power too. He wouldn't get the big lope but also wouldn't get drivability/tuning issues. Who the hell suggested he buy that cam from Comp?
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Old 01-21-2012, 03:27 PM   #5
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Ya, thats kinda what i was thinking... Just wanted to back it up with some other experience or thoughts from u guys. Believe it or not he phoned in to comp with his setup and an actual comp rep recommended that bump stick. Probably asked for an aggressive cam for a roots setup, found the first one with big numbers and blower in the description and slapped it off on him. Not really tailored to his app at all.. Well we'll see if we can make him happy.. Its in the truck already, so either we're gonna have a lumpy as hell 5.3 or big cam for sale. lol I guess he is a actually running at 2600 stall.. but still... :S
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Old 01-21-2012, 05:38 PM   #6
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Quote:
Originally Posted by l_kusler View Post
Ya, thats kinda what i was thinking... Just wanted to back it up with some other experience or thoughts from u guys. Believe it or not he phoned in to comp with his setup and an actual comp rep recommended that bump stick. Probably asked for an aggressive cam for a roots setup, found the first one with big numbers and blower in the description and slapped it off on him. Not really tailored to his app at all.. Well we'll see if we can make him happy.. Its in the truck already, so either we're gonna have a lumpy as hell 5.3 or big cam for sale. lol I guess he is a actually running at 2600 stall.. but still... :S
Getting cam help from Comp cams can be a crap shoot. Some guys there are pretty sharp and some.... Also depends on the info you give them. I won't do any cam changes without getting Pat G's recs. The one I'm selling isn't exactly what he recommended, but very close.
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Old 04-08-2012, 04:01 PM   #7
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Default i guess gm can't pick camshaft either????

Intended for NHRA’s various Stock Eliminator classes, the COPO Camaro concept has provisions for two distinct engine packages – each built to conform to class guidelines. The details below outline the core specifications of each engine and their intended classes.








427


327




Suggested class


A Stock


AA Stock




Cubic inches


427(7.0L)


327 (5.3L)




Block


LS7


LS9




Block material


aluminum


aluminum




Crank


forged steel


forged steel




Rods


H-beam


H-beam




Pistons


forged dome


forged dome




Compression ratio


TBD


10.2:1




Heads


LS7


LS7




Rocker arms


LS7 1.8-ratio


LS7 1.8-ratio




Induction


natural aspiration


boosted




Intake


Holley


supercharger




Camshaft type


hydraulic roller


hydraulic roller




Cam duration (deg.)


233/276 @ .50-in.


244/255 @ .50-in.




Cam lift (inch)


.595


.650
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Old 04-08-2012, 07:38 PM   #8
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Quote:
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Intended for NHRA’s various Stock Eliminator classes, the COPO Camaro concept has provisions for two distinct engine packages – each built to conform to class guidelines. The details below outline the core specifications of each engine and their intended classes.
I know there's a point you're trying to make......but, I don't see it. What?
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Old 04-08-2012, 08:39 PM   #9
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maybe 1 227/235 at 115+4
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Old 04-08-2012, 08:41 PM   #10
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I guess I am trying to say the boys at general motors are making a similar engine with a similar cam.
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Old 04-08-2012, 08:41 PM
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