SHP LS Next Nitrous Build going to the Dyno.....
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From: Kingston, Ontario, Canada
SHP LS Next Nitrous Build going to the Dyno..... 
Clear hood insert on Fbody.....
Hi guys. Build is as follows: SHP LS Next Steel Block with 4.155 bore and 4 inch stroke and 1/2 inch Head Stud provision. Rotating assembly is Callies Compstar Crank, Diamond LS2k pistons and Lunati Pro Billet I-beam rods. Compression around 11.5 to 1. Rings are gapped for 350-400 shot through Nitrous Outlet Direct Port. Intake is Tony Mamo ported LS3 FAST with regular runners and 55llb injectors. Heads are Brodix 6 Bolt LS3 CNC Br Bp with stainless intake and Inconel exhaust valves. Cam spec’d by Martin Smallwood at 246/262 and .629/.612 at 115+4. Lifters are Morel 5206 link-bar. Pushrods are 3/8 and .105 wall. GM Performance 1.8 ratio Rockers with trunnion upgrade. MSD Coils providing the spark. Exhaust is 1 7/8 headers through twin 3 inch cut-outs off the headers. Power will be transferred to the wheels through a Performabuilt Black Edition 4l60e transmission (revised 1st and 2nd at 2.83 and 1.55 respectively), Pro Yank 3600 Nitrous Converter and Mark Williams 12 Bolt with Wavetrac, 3.73 gears, 35 spline and 5/8 studs.
What do you guys think of the build? It’s built for big nitrous but what do you think she will make n/a?
Last edited by CanadianEh!; Jun 22, 2018 at 06:30 AM.
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From: Kingston, Ontario, Canada
It’s been a journey..... The short answer is 503 rwhp. The long answer is I purchased some used MSD coils (model 8245) from a forum member on here. They were the older versions and many were split apart. When we finally got the engine back in we were plagued with inter-mittent mis-fires. The tuner switched to SD Tune to clean up the drivability issues. Drivability was great after that and we proceeded to Dyno at 503 rwhp. The next day the mis-firing and missing was back. I decided to swap all of the MSD Coils for my Stock LS1 coils and right off the bat a whole different car. Now I have no issues except with the new coils and my first down the track, even though tuned for 13:1 A/F on the Dyno, car ran 14:1 -14.5:1 so I got out at 1/3rd track. We had previously checked the fuel pressure and it was ok. The car now wants more fuel and hopefully that means more power. I data logged some driving and WOT and my tuner is going to do the adjustments remotely. Since I changed the coils this thing is a beast and I can’t wait to hit it with some nitrous. Not rushing though - step by step.
Last edited by CanadianEh!; Jul 21, 2018 at 07:39 AM.
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Thread Starter
9 Second Club
iTrader: (4)
Joined: Aug 2009
Posts: 317
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From: Kingston, Ontario, Canada
I’m thinking that as well! The true test will be track times and mph compared to my old 402 set-up. This new motor is optimized for nitrous so my goal is to improve on my previous set-up running 9.60s to low 9s. I’ll report on progress made....
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