C.R. Ratio?
Le Mans Master
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
CHW L48 350-cid 185-hp V-8 8.2:1 manual four-barrel carburetor
CLM L48 350-cid 185-hp V-8 8.2:1 automatic four-barrel carburetor
CLR L48 350-cid 175-hp V-8 8.2:1 automatic four-barrel carburetor California
CLS L48 350-cid 175-hp V-8 8.2:1 automatic four-barrel carburetor high-altitude
CMR L82 350-cid 220-hp V-8 8.9:1 manual four-barrel carburetor
CMS L82 350-cid 220-hp V-8 8.9:1 automatic four-barrel carburetor
CUT L48 350-cid 185-hp V-8 8.2:1 automatic four-barrel carburetor
CLM L48 350-cid 185-hp V-8 8.2:1 automatic four-barrel carburetor
CLR L48 350-cid 175-hp V-8 8.2:1 automatic four-barrel carburetor California
CLS L48 350-cid 175-hp V-8 8.2:1 automatic four-barrel carburetor high-altitude
CMR L82 350-cid 220-hp V-8 8.9:1 manual four-barrel carburetor
CMS L82 350-cid 220-hp V-8 8.9:1 automatic four-barrel carburetor
CUT L48 350-cid 185-hp V-8 8.2:1 automatic four-barrel carburetor
Thread Starter
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
If you are going to run that cam you need to pick up your CR and flow. Your car run will run like a total dog with no bottom or top end. I put a set of Edelbrock performer RPM heads with 68 cc (I think) chambers and that pick up my CR to about 9.5:1, I install a CC 256 cam and a set of Dynomax headers and my rear wheel HP was 260 hp with 320 ft-lbs Tq. Using a Turbo 400 that would put my engine out put at around 330 hp. Not bad. A far cry from stock. You will gain more from just upgrading to headers for now and save up for some good heads.
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Thread Starter
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
You need better heads and a different cam. Is the transmission an auto or 4spd.? If it is an auto, you can only go with so large of a cam without changing the torque converter. Smaller cams limited the CR that you can use.
If you want to run 10-10.5 CR with iron heads, you better be looking at a fairly big cam.
Get some dish pistons, some good 64cc heads, and the XE268 cam will work fine.
If you want to run 10-10.5 CR with iron heads, you better be looking at a fairly big cam.
Get some dish pistons, some good 64cc heads, and the XE268 cam will work fine.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
If your going to run old style combustion chamber iron heads
your going to have to be happy with 9.00 to 9.5 comp ratio
it would take a lot of cam to bleed off enough comp for 10.5
to work, way more then your probably willing to run in a street
car and even then a big cam in a 350 you would have soggy
torque down low. 76cc heads are a pain to make any comp.
with and a 3.48 stroke.
your going to have to be happy with 9.00 to 9.5 comp ratio
it would take a lot of cam to bleed off enough comp for 10.5
to work, way more then your probably willing to run in a street
car and even then a big cam in a 350 you would have soggy
torque down low. 76cc heads are a pain to make any comp.
with and a 3.48 stroke.