ls1 383 140shot
TECH Fanatic
Joined: Mar 2003
Posts: 1,112
Likes: 0
From: Dallas
Originally Posted by camaroz28nbm383
Old 1998 mms stage 2 67cc. The motor has eagle rods eagle crank and ross -9 pistons. The cr is about 9.8. The cam is 232 239 600? 109lsa. I have pacesetter headers and lanes true duals and a asp underdrive pulley. The runs were on 93 octane. But i think the heads are junk because it was hitting a brick wall at 6200 on the dyno.
Yea, with compression that low, save up a bit more and get a blower or turbo. TEA Stage 1.5's are around $1500-$1600 and would prolly make all the diffrence in the world if you wanted new heads.
Originally Posted by camaroz28nbm383
When i bought the heads used i was told they were milled to 59cc. But 4 months later i found out they were stock 67cc (lied too) The head have 2.02 1.56 valves The motor was in the car by then so that is why the cr is only 9.8. I am using the stock .052 gm head gaskets.
The valve springs are the patriot gold springs. I am using the luca 42lbs (for the dry shot) 340 fuel pump. The cam was installed dot to dot
What cam do you recommend (jrp) with my 9.8 cr?
The valve springs are the patriot gold springs. I am using the luca 42lbs (for the dry shot) 340 fuel pump. The cam was installed dot to dot
What cam do you recommend (jrp) with my 9.8 cr?
or do what beast said and opt for a new set of heads and have them setup for your application.
3.905 bore
4.00 stroke
62.38cc (ls1 head milled .030)
.040 cometic gasket
3.910 gasket bore
-.008 deck height (used OEM specs, you can measure yours for specifics)
9cc dish
11.1060 SCR
ptv clearance shouldnt be a problem as i assume pistons are 2cc valve reliefs with a 7cc dish.
4.00 stroke
62.38cc (ls1 head milled .030)
.040 cometic gasket
3.910 gasket bore
-.008 deck height (used OEM specs, you can measure yours for specifics)
9cc dish
11.1060 SCR
ptv clearance shouldnt be a problem as i assume pistons are 2cc valve reliefs with a 7cc dish.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Originally Posted by jrp
these are the type of numbers you get with a combo done with parts just thrown together.
9.8 SCR coupled with a cam thats got 17.5* overlap
1) valves sizes, port volumes, and head flow of said heads
2) valve springs used
3) head gasket and deck height
4) fuel system
5) ICL cam was installed on.
9.8 SCR coupled with a cam thats got 17.5* overlap
1) valves sizes, port volumes, and head flow of said heads
2) valve springs used
3) head gasket and deck height
4) fuel system
5) ICL cam was installed on.
9.8 SCR? WTF? 
Thread Starter
Teching In
Joined: Mar 2005
Posts: 48
Likes: 1
When i bought the heads used i was told they were milled to 59cc. But 4 months later i found out they were stock 67cc (lied too) The head have 2.02 1.56 valves The motor was in the car by then so that is why the cr is only 9.8. I am using the stock .052 gm head gaskets.
The valve springs are the patriot gold springs. I am using the luca 42lbs (for the dry shot) 340 fuel pump. The cam was installed dot to dot
What cam do you recommend (jrp) with my 9.8 cr?[QUOTE]
The valve springs are the patriot gold springs. I am using the luca 42lbs (for the dry shot) 340 fuel pump. The cam was installed dot to dot
What cam do you recommend (jrp) with my 9.8 cr?[QUOTE]
