Cam selection - Team Camaro Tech
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post #1 of 2 (permalink) Old Apr 12th, 10, 01:42 AM Thread Starter
Tech Team
Join Date: Jul 2009
Location: New Zealand
Posts: 61
Cam selection

Hey all....Ok well this topic has know doubt been put out there before
so I hope i'm not annoying any body

I have a 72 chevelle 454 in my 67 rs
it has oval port heads,alloy intake and a 750 edelbrock..H.E.I
stock exhaust manifolds with a 2.5 inch 2 into 1,flowmaster 2 chamber and
just dumped out before the diff

T.H400,through a 3.08 lsd

ok so far apart from the mentioned bits its all pretty stock

I want to pull the motor this winter (next month) so would like to fit a "Rumpity,Rumpity" cam

i have priced up cam,lifters,double springs and a 2200rpm converter

Could you's please point me in the right direction for cam specs and correct converter stall...The car is only a streeter and won't be raced but i want it to sound "TUFF"

over here (NZ) we deal alot with extreme energy cams so if not a name....
I.E "crower beast" then the specs so i can cross it over to one of our cams
Hope thats not confusing
Thanks heaps

Once your've had RAT.....
you'll never go back
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post #2 of 2 (permalink) Old Apr 12th, 10, 06:11 AM
Senior Tech
Join Date: Nov 2006
Location: North Channel Lake Huron
Posts: 3,934
Re: Cam selection

OK 3.08's through a TH400. Now you need to know the Static Compression of the Engine before selecting a Cam. Anywhere between a 9.5:1 to 10:1 Static in a 454, I would recommend the Comp Cams XM278H-12 with the 3.08 Gears. If the Static Compression is between 8.5 to 9.5 perhaps the XM270H-12 and if lower a 266 or 268H-10 HFT Cam. The goal is to get the Dynamic Compression Ratio to a respectable 8 or 8.2:1 DCR for Pump Gas.

Download and install Patrick Kelley's DCR Calculator here: and suggest Comp Cams Camquest Software here:

If you do not know the Static Compression and have no information on the Engine Assembly it will be necessary to remove a Cylinder head to note the Piston Dome Volume and CC the Heads. I also suggest you put Tail Pipes on her if you don't want to go Deaf and loosen every nut a bolt on the Car ;o)

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Last edited by Z15CAM; Apr 12th, 10 at 06:27 AM.
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