Wiring Harness from Performance Systems Integration PSI
The only thing you need a speed sensor on a manual trans or non-electronic auto for is the decel, throttle cracker and some idle tables. As long as the tune is close on the engine, 95% of this stuff doesn't matter. You may have the car die once in a great while if you go to neutral from drive just coasting, but that will be all. All that needs done there is have a slower ramp on the IAC closing and it will be fine.
I called them too,
BRP uses them, nice people but i like SSPwiring Steve seemed to know the most,
What ever you do dont get robbed by Speartech,
We carry LT1, LS1 24x DBC and DBW, Vortec DBC and DBW, and LS2/3 58x DBW.
http://psiconversion.com/
You can also check our instructions on the site to get an idea for whats involved in the install.

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Also, Wait4meperformance modded my stock 98' harness and pcm and it works flawlessly, but if I'd known then what I know now then I would've asked to have the harness reconfigured for the 0411 pcm.
The Best V8 Stories One Small Block at Time
We carry LT1, LS1 24x DBC and DBW, Vortec DBC and DBW, and LS2/3 58x DBW.
http://psiconversion.com/
You can also check our instructions on the site to get an idea for whats involved in the install.
Got it from PSI, and had about 3 quick questions all of which were answered immediatly, and if I remember it was 4th of July weekend. I did the wiring swap in my driveway, and had the old harness out and the new one in, in about 3 hours and most of that was cutting out the crappy old harness, and wrapping the new harness in heat shielding and tape/shrink wrap.
You pay more anywhere else, just know you're pissing your money away.
Now do me a favor and at least update my cars picture on your website instead of that whale tail
Last edited by sciff5; Mar 14, 2011 at 08:16 PM.
do you have one without any transmission wiring, as im going to use a th350

Your Source for LSX Conversion Parts!
www.psiconversion.com
Ebay Store
Facebook/psiconversion
Instagram/psiconversion
'Dont Let EFI Pass You By!'
We carry LT1, LS1 24x DBC and DBW, Vortec DBC and DBW, and LS2/3 58x DBW.
http://psiconversion.com/
You can also check our instructions on the site to get an idea for whats involved in the install.
I was completely against buying one, I modified my own and was like ehhh...why not - I took the plunge and bought one from you guys - awesome quality.
I also talked to SSP wiring and after i research them i won't be using them. Steve sounded like a very smart guy but i don't think ill be going that route.
PSI will most likly be gettin my business
Both the SerTech and PSI came with Fuse Block with Relays and Fan Pig Tails the SperTech Harness was $750.00 with shipping and the PSI harness was $499.00 and i talked to Joe at PSI and he was a NICE guy a lot nicer then the guy i talked to from SperTech.
Joe From PSI all so told me for $200.00 more they would sale me a NEW ECM and put a Tune in it for my car so that made my total for the harness and ECM from PSI the same Price as just the harness from SperTech.
SperTech wonted $200.00 just to put a Tune on the Computer and i did not even have one so for me to get a Computer and have SperTech Tune it would have been around $300.00.
All so PSI told me if i need anything when i was wiring my car to just give them a call and Joe the Tech Guy for PSI would Help me any way he could he all so told me if i need anything changed in my ECM to just send it back and it Would be changed for Free.
Good to hear that there are a number of good options.
BUYER BEWARE is all I can say about SSP Wiring!!! Do some reading and educate yourself on this company before spending your money. Very shady past here guys and there's a reason they're not real well known amongst those of use here on this forum who regularly do LS based swaps.
A little research will show you SSP or STEVE HILTNER is the same shady individual who used to own LS1 Performance in Chandler AZ.... Only now he lives up in Prescott and owns a couple restaurants and does the harnesses on the side under SSP. See the link below - the truth shall set you FREE:
https://ls1tech.com/forums/western-m...andler-az.html
^^^Nothing good there!! BUYER BEWARE
Mods: You should probably edit the posts of the poster recommending SSP Wiring harnesses.




