ls1 383 140shot
05-17-2005, 09:07 PM
#1
ls1 383 140shot DYNO GRAPH Just got back from more performance. My car put down na 422hp 426tq with 900psi 140 dryshot it put down 561hp 578tq on the first run on the second run it put down 520hp and 598.70 it was running lean on both nitrous runs 13.0.
Last edited by camaroz28nbm383; 05-19-2005 at 03:11 PM.
05-18-2005, 05:52 AM
#6
TECH Junkie
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Originally Posted by 2000 Tran Zam
nice, those numbers seem a little low for a 383, unless your cam is tiny or you have restrictive heads. either way, awesome.
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05-18-2005, 07:31 AM
#8
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I've been told (LG Motorsports) that a fully built 383 can go to the 480/480 range N/A. Mine has been estimated by the builder at about 440 with the mild (224/228) cam. Let us know. 
05-18-2005, 09:41 AM
#10
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.
05-18-2005, 10:25 AM
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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.
Any upgrades to the drivetrain (clutch/stall, driveshaft, rear end, etc...)?
What tranny?
05-18-2005, 03:08 PM
#17
I dont know if i should get this heads milled and get them ported by someone or get new heads. I only have 1000 to spend
Last edited by camaroz28nbm383; 05-18-2005 at 04:45 PM.
05-18-2005, 03:38 PM
#18
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.
05-18-2005, 04:49 PM
#19
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?
