81 hp gain
Thread Starter
Instructor
Joined: Apr 2011
Posts: 121
Likes: 0
81 hp gain
I have a stock 81 was wanting to figured a general hp gain.
I got a (not yet installed)
-600 Edelbrock Carb
-Edelbrock Performer Intake Manifold
-Comp cam kit. (Cam/Lifter, Valvetrain, Hydraulic Flat Tappet, Advertised Duration 268/268, Lift .454/.454, Chevy Small Block, Double Timing Chain, push rods)
-Headers Primary 1 5/8 3 inch coll going true dual
-350 Trans with 25 stall
Im taking all emissions egr off.
Trying to figure how much hp it will be at and if ill run into any problems.
I got a (not yet installed)
-600 Edelbrock Carb
-Edelbrock Performer Intake Manifold
-Comp cam kit. (Cam/Lifter, Valvetrain, Hydraulic Flat Tappet, Advertised Duration 268/268, Lift .454/.454, Chevy Small Block, Double Timing Chain, push rods)
-Headers Primary 1 5/8 3 inch coll going true dual
-350 Trans with 25 stall
Im taking all emissions egr off.
Trying to figure how much hp it will be at and if ill run into any problems.
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
if you had a stock stall before than your 2500 is going to give you the best improvement.
all those parts wont give you any problems, just improvements . now search for some vortec heads or similar.
all those parts wont give you any problems, just improvements . now search for some vortec heads or similar.
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
is the stock ECM still hooked up and working? if it is, you will need a non computer controlled distributor to run the Edelbrock carb.
If it was me, I would use the stock carb, unless thats a huge cam that will set the CEL.
If it was me, I would use the stock carb, unless thats a huge cam that will set the CEL.
Burning Brakes
Joined: May 2008
Posts: 1,116
Likes: 5
From: Middleburg Florida
It's a really nice start, be prepared though. That engine has 8.2:1 compression and the heads are designed for emissions not necessarily performance. qwank is absolutley correct, the CCC distributor will also limit what you've got planned. If at all possible, you might want to consider heads too, or waiting until you can include the heads with the package. As I'm sure you know, everything has to work together and unless you can take advantage of the cam, intake and exhaust (via good flowing heads and valves) you might be frustrated....
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
You will see a dramatic improvement somewhere over 3000 & up (you) 
due mainly to cam & exhaust. Needs better heads. If it was a fresh build on dyno under 300hp maybe 275 just to give you a no. & w/ new heads over 300HP.
due mainly to cam & exhaust. Needs better heads. If it was a fresh build on dyno under 300hp maybe 275 just to give you a no. & w/ new heads over 300HP.
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Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Thread Starter
Instructor
Joined: Apr 2011
Posts: 121
Likes: 0
Texas, but im not concerned emissions I just want it off.
From what I read the direction im in seems to be good. I wanted to check if anyone had any problems installing these parts just so I could get a heads up.
Also if anyone knows some detailed corvette cam swaps that they could lead me to that would be great.
From what I read the direction im in seems to be good. I wanted to check if anyone had any problems installing these parts just so I could get a heads up.
Also if anyone knows some detailed corvette cam swaps that they could lead me to that would be great.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Your plan has a flaw, your planning on installing a smaller carb than what is on there now?
Thats not going to make much HP. You should already have a good intake on there, the 2101 is a good unit. The cam kit and dual setup will do more than anything else to wake it up. I would save the $ from the carb and intake and put it in heads, AFR185 or the like.
Thats not going to make much HP. You should already have a good intake on there, the 2101 is a good unit. The cam kit and dual setup will do more than anything else to wake it up. I would save the $ from the carb and intake and put it in heads, AFR185 or the like.
Thread Starter
Instructor
Joined: Apr 2011
Posts: 121
Likes: 0
Well at this moment im trying to get all emissions off first, and for the carb that was the one recommended over the holley 670 because its a daily car. And as for the heads Im planning to do it after the distributor
Instructor
Joined: Apr 2011
Posts: 151
Likes: 1
From: Cedar Springs MI
I got pretty good perf out of it and good gas mileage.
That being said, if I had better heads as well I would have wanted at least a 670 Avenger. They are very easy to tune to your mods as well just send Holly support an Email with your combo and they will tell you what seconday springs to use and squirter etc..
