modifying an L-82
Le Mans Master
Joined: Apr 2005
Posts: 6,363
Likes: 429
From: Seattle Area WA
Nope, your L-82 or GM 3896962 is ground on a 114 LSA same as the GM "151" cam. Both cams are very similar with the exception that the "151" is ground 4 degrees advanced on a 110 Intake Center Line (ICL) for the shorter stroke of the 327 and the L-82 cam has a bit more lift. Even being on a 110ICL, I install the "151" 4 degrees advanced for stump pulling torque.
BTW, you will not gain much in compression by using a .019" or even a .015" thick head gasket since the stock GM gasket on your engine is already a shim gasket at .021".
BTW, you will not gain much in compression by using a .019" or even a .015" thick head gasket since the stock GM gasket on your engine is already a shim gasket at .021".
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Nope, your L-82 or GM 3896962 is ground on a 114 LSA same as the GM "151" cam.
BTW, you will not gain much in compression by using a .019" or even a .015" thick head gasket since the stock GM gasket on your engine is already a shim gasket at .021".
Le Mans Master
Joined: Mar 2004
Posts: 7,507
Likes: 1,514
From: Little Rock AR
110 degree lobe centers will not exactly "kill" the bottom end but it is more of a compromise. The L-82 cam doesn't have much bottom end to begin with so you can see that it isn't easy to compare it to aftermarket grinds.
GM cams are ground very differently as compared to aftermarket grinds. You can not easily compare the typical aftermarket specs to GM specs and get anything meaningful.
Bottom line - you have to decide if you want "stock" sounds, appearance and manners with high performance OR do you want to move away from "stock" and build more of a hot rod that will not be mistaken for stock when idling, give away some manners but give you more peak power. An aftermarket 110 LC cam will not sound stock. The "962" 350/350 (or L-82, same grind) cam will sound and act stock but will have a lot more top end if you get some better heads.
-Mark.
Le Mans Master
Joined: Mar 2004
Posts: 7,507
Likes: 1,514
From: Little Rock AR
Your results may vary and you need to match the C/R to the cam timing.
-Mark.
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Thanks for all the info Mark. I guess when it gets time for cam selection, I'll be alot more knowledgeable. Maybe I'll just buy another block so I can do one hotrod, and one original!
Le Mans Master
Joined: Apr 2005
Posts: 6,363
Likes: 429
From: Seattle Area WA
The stock GM L-82 cam will like more compression because it has a relatively late closing inlet valve. I wouldn't be afraid to run 10-10.25:1Personally, I'm running the "151" in my son's '76 and it's built with a static compression of 10.25:1 and it runs very strong on premium.
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
Unless the 882 are in perfect shape and all you have to do is some bowl clean up and some $100 springs, they are the black sheep of the cylinder heads.
I just started my car with a the Comp Cams 470/270 cam and so far its pretty good sounding and I notice a power gain.
I got it idling about 600 in gear.
Stock I had about 18 lbs of vacuum now its down to 12.
I just started my car with a the Comp Cams 470/270 cam and so far its pretty good sounding and I notice a power gain.
I got it idling about 600 in gear.
Stock I had about 18 lbs of vacuum now its down to 12.
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Unless the 882 are in perfect shape and all you have to do is some bowl clean up and some $100 springs, they are the black sheep of the cylinder heads.
I just started my car with a the Comp Cams 470/270 cam and so far its pretty good sounding and I notice a power gain.
I got it idling about 600 in gear.
Stock I had about 18 lbs of vacuum now its down to 12.
I just started my car with a the Comp Cams 470/270 cam and so far its pretty good sounding and I notice a power gain.
I got it idling about 600 in gear.
Stock I had about 18 lbs of vacuum now its down to 12.
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Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
As in perfect shape I assum you mean the iron. But wow Tim, you're the first person I've ever heard say anything quality about 882 heads. But I do understand alot of people's reasoning about dumping money into heads that won't match up to what you can buy. I guess it really is gonna depend on how much I want to keep it original. I mean I HAVE to put on headers, so maybe I will change out the heads. It just seems like my goal is not worth it. I guess to the shelf the 882's go
Unless your going with a real big cam or a roller set up, you don't anything over 175/180 CC.
All those $1000 and up iron heads are a waste of money on the street and only for bragging rights.
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Oh I don't like them either but, just tring to help you save money and stay original, myself I would go with Darts or Summit heads.
Unless your going with a real big cam or a roller set up, you don't anything over 175/180 CC.
All those $1000 and up iron heads are a waste of money on the street and only for bragging rights.
Unless your going with a real big cam or a roller set up, you don't anything over 175/180 CC.
All those $1000 and up iron heads are a waste of money on the street and only for bragging rights.
I do appreciate the help Tim, I think you're the only one who has stuck to my goal regardless the dislike for the 882s. Its good to get help on exactly what you want. Thanks alot.
