I currently have an 84' LG4...my dad bought a TPI setup (needs fuel pump only) off of an 85' 305 TPI. What all am I gunna need to do here to make the swam. I will probably need to use the "new" wiring harness right, from the TPI that is? What else, will I have to do any modification to make it fit? Anything? Any tips from someone who has done this? Thanks in advance.

 

OK go to http://www.3rdgenformula.com and after the splash page, on the main menu page go to "modifying my formula" in there you will read how I did my swap from LG4 to TPI.

I did a firebird, if you have a camaro it will e slightly different. But it will give you some idea of what I went through to get it RIGHT.

If you need a dash, I think most V6 dash will work as well. check the plugs on the passenger side for wire colors to where they plug into the engine harness & ECM.


Good luck


John

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87 Formula Yellow/Black
Engine & Transmission
.040 over 5.0 converted to TPI, 9.5:1 Compression, SLP Cam Dur 206/212, Lift 480/487, Cent Line 112, SLP 1 3/4" headers, SLP 3" cat-back exhaust, K&N Airfilter, Modified Stock cold air intake, Ported & polished Stock TPI intake, Holley Adjustable Fuel Press regulator, most of the Free mods.
Gil Younger (no yo-yo) Shift Kit, Aluminum Driveshaft, 3.73 Posi gear
Suspension & Brakes:
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Hotchkis strut tower brace, SSM frame connectors, Custom reinforced control arms and pan hard bar.
Interior:
Custom Leather interior, CUSTOM Yellow Gauge Faces, Kenwood Receiver, Pioneer Speakers, Kicker Substations, Kenwood 10 Disk Changer, Pioneer Amp.

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

SINCE you dont have a wire harness, go with an 86-89, or go with a 90 - 92 with Speed density.

 

I agree with Okfoz. There is very limited information on the eproms for 1985s, which will make getting an eprom should you decide to modify the engine in the future.

If you like MAF, then go the 165 ECM route like 86-89 Thirdgens, else look at SD 7730 ECM.

 

hmmm sorry when i said new wiring harness i put it in quotes because i meant it would be new to the engine...we have the wiring harness if that changes any of your suggestions? thanks again

 

oh, and why do you think i need another dash, and what exactly do you mean by dash...im assuming gauge cluster...and if thats it do you say i need a new one to hook up to the harness or because you read my other post concerning gauge cluster interchangability?

 

The wiring harness on the 4BBL & TPI dashes are different. I had to literally remove the entire dash, and use the one from my donor car. Only took me about 5 to 6 hours to do the swap.

I even had an electronic speedo & everything, thats not the problem, I think all your gages will still work, where you will run into problems is the Fuses will be all messed up, and there are some 3-6 extra wires that go from the engine wire harness to the Fuses.

Your gages MIGHT still work if you have the electonic gages. But you might run into some other interesting problems that I personally was not interested in fighting with. (This is NOT a single weekend project)

John

 

hehehe, i wasnt planning on tackling it in one weekend, i figured id do it over the course of winter when i wasn't driving it anyway...but i didn't see myself needing an entirely new dash...what sorta dash should i start looking for down at the boneyards? just a dash out of an 85 tpi or something?

 

You do not have to change the dash wireing harness if you don't want to. All that is needed are a dozen or so wires extra needed. See this link for a shetch of the additional wires. I used the factory wiring manual to verfiy this information. I also performed the same swap. E-mail me direct for any specific questions, it's relitively easy if your not scared of wiring.

http://members.home.net/millicanga/files/TpiWiring.jpg

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86 Camaro Sport
383 Speed-O-Motive Crate Engine, Raptor 700R4 Tranmission, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Hooker Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project

 

thanks, that is a nice piece of information...i will probably email with specific questions...im sure they will come about

 

No problem. Send any specfic questions.