Cam for stock engine
Thread Starter
Burning Brakes
Joined: Jun 2006
Posts: 809
Likes: 1
From: Mass
Cam for stock engine
I am looking at upgrading my cam on my stock L48. I have been told to look at the Comp Cams 268H cam. The car runs good right now with a true dual exhaust and I have a performer intake and possibly new carb to put on with the cam.
I want a cam that is more for torque and more performance driven than the stock cam.
So is this a good cam to put on my car? Anyone have it on their car? Any problems with vacuum?
I want a cam that is more for torque and more performance driven than the stock cam.
So is this a good cam to put on my car? Anyone have it on their car? Any problems with vacuum?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
I am looking at upgrading my cam on my stock L48. I have been told to look at the Comp Cams 268H cam. The car runs good right now with a true dual exhaust and I have a performer intake and possibly new carb to put on with the cam.
I want a cam that is more for torque and more performance driven than the stock cam.
So is this a good cam to put on my car? Anyone have it on their car? Any problems with vacuum?
I want a cam that is more for torque and more performance driven than the stock cam.
So is this a good cam to put on my car? Anyone have it on their car? Any problems with vacuum?
I have an L82 cam for sale, in great shape, that will give you a bit more performance.
In reality, there are two things that will hamper your performance no matter what cam you go with. Compression, and head flow numbers.
You're limited in what you can do with your stock heads and low compression.
Racer
Joined: Feb 2005
Posts: 317
Likes: 2
From: coral gables miami
Use the GM cam #151 with 1970 LT1 valve springs. A new set of lifters and rocker arm adjusting nuts and it will improve the engine performance like no other 'stock' camshaft. From the 350 HP 327. .
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Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
You maybe have a true 8.00 compression ratio with your L/48 to work with the 327/350hp cam had 11.00 compression to make the
222 .050 duration work, generally had a 4 speed 3.55 gearing. If you have things like 3.08 gearing automatic plus your pitiful compression ratio suggest you consider a 262 advertised duration cam.
222 .050 duration work, generally had a 4 speed 3.55 gearing. If you have things like 3.08 gearing automatic plus your pitiful compression ratio suggest you consider a 262 advertised duration cam.
Le Mans Master
Joined: Mar 2004
Posts: 7,507
Likes: 1,513
From: Little Rock AR
The 268H is a very good choice for a stock low 8:1 compression L-48 engine upgrade. It will work fine with your accessories.
In my opinion the 327/350 or 350/350 cams suggested above would work better if you had a little more like 10:1 compression. Those cams are also both a bit softer on bottom end torque as compared to the stock base engine cam you have now. I have run both of them and still run the 350/350 today. While they are very sensible and reliable choices for a Corvette application, they realy like compression and some gear to match their full potential. The Comp 268H is better if you don't want to change a bunch of other stuff at the same time. JMO.
-Mark.
In my opinion the 327/350 or 350/350 cams suggested above would work better if you had a little more like 10:1 compression. Those cams are also both a bit softer on bottom end torque as compared to the stock base engine cam you have now. I have run both of them and still run the 350/350 today. While they are very sensible and reliable choices for a Corvette application, they realy like compression and some gear to match their full potential. The Comp 268H is better if you don't want to change a bunch of other stuff at the same time. JMO.
-Mark.
