Newbie New Build
Thread Starter
Teching In
Joined: Sep 2008
Posts: 12
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Newbie New Build Input would be greatly appreciated. I am thinking of building up an LS1 but need some advice. the engine is for an off road buggy. Here are my thoughts:
I have a 98 LS1 block and want to run:
Scat crank 4.100
H beam rods 6.125
Dish pistons (I need to keep the compression at about 9.5 - 1 because I need to run pump gas). any advice on pistons?
Cam - need advice on a cam that is high on torque
Heads - will a 243 head work?
Fast 90 intake and TB
Thanks!
I have a 98 LS1 block and want to run:
Scat crank 4.100
H beam rods 6.125
Dish pistons (I need to keep the compression at about 9.5 - 1 because I need to run pump gas). any advice on pistons?
Cam - need advice on a cam that is high on torque
Heads - will a 243 head work?
Fast 90 intake and TB
Thanks!
TECH Regular
Joined: Aug 2010
Posts: 462
Likes: 0
From: houston, texas
wouldnt run the 4.100 crank. i have 11.3 to 1 compression and run 92-93 pump gas. if you have to build the rotating assembly go with a 383 with good parts (ie. callies, diamond, weisco). prob need to know more about the build to determine cam and other parts. just for reference mine makes great low end considering the cam that it has. remember that if you build the 383 your regular off the shelf 347 cams will be more mild due to the increase in cubes.
there are several reasons why not. Of them, and someone else can chime in and correct me, there are bottom end clearance issues, not enough deck height to keep the pistons in the hole, and i believe there are others. Aftermarket blocks are usually good for more deck height that will accommodate the extra length in stroke.
TECH Addict
Joined: Mar 2009
Posts: 2,099
Likes: 3
From: Texas/Afghanistan
there are several reasons why not. Of them, and someone else can chime in and correct me, there are bottom end clearance issues, not enough deck height to keep the pistons in the hole, and i believe there are others. Aftermarket blocks are usually good for more deck height that will accommodate the extra length in stroke.
as for compression 11:1 can be run no problem on 93 octane. it's all in the tune. if you are looking for a torquey cam ask pat g to spec you one out.
https://ls1tech.com/forums/generatio...am-change.html
lq9 is not necessary, plenty of hp and tq can be had with an ls1. especially if you are going to an after market bottom end.
