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questions about a 85 iroc 305 tpi

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Old 11-21-2012, 05:42 PM
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Car: 1985 iroc z
Engine: 5.0
Transmission: 700r4
questions about a 85 iroc 305 tpi

im looking to start upgrading my car. i just dont know what i can and cant do with this car. i havent ever starting doing stuff to cars to add power so im a little lost on this subject. i have been reading and looking up some things but i just dont know what i should do. any advice would be appreciated. i am a mechanic but i dont work on cars that are putting mods on them to make them more powerful. i have my dad to help with anything i do to the car but i need a place to start besides the cat back exhaust. im buying the borla cat back for the car but besides that i dont know what else to get. headers, cat, y pipe. all of this im new to and im sorry if i ask stupid questions im just trying to learn
Old 11-22-2012, 01:11 AM
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Car: 1988 IROC-Z
Engine: L98 - full intake & exhaust boltons
Transmission: Bowtie 700r4, 2400 rpm stall
Axle/Gears: Borg-Warner 9bolt, 3.45 gears, posi
Re: questions about a 85 iroc 305 tpi

These links below should help you out.

https://www.thirdgen.org/forums/tpi/...-92-trans.html

https://www.thirdgen.org/forums/tpi/...ley-52-tb.html

https://www.thirdgen.org/forums/hist...ml#post5388949

https://www.thirdgen.org/forums/tran...r-looking.html

Last edited by yaj15; 11-22-2012 at 01:15 AM.
Old 11-22-2012, 11:41 PM
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Car: 1985 Camaro Z28
Engine: 305 TPI
Transmission: 700R4
Re: questions about a 85 iroc 305 tpi

I would start with changing over to a 1227165 ecm(86-88 style). I did this, was a major difference. This ecm refreshes at a much better rate. You will need a couple relays and a MAF sensor to do it. Well worth it though, especially if you planning on tuning your car.
Old 11-23-2012, 04:37 PM
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Car: 1985 iroc z
Engine: 5.0
Transmission: 700r4
Re: questions about a 85 iroc 305 tpi

i plan on tuning it but i am trying to find out what are some good things to put on it before i do the tune... plus i gotta find some 1 that can tune it
Old 12-01-2012, 09:49 PM
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Car: 1967 Camaro, 91 z28
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Re: questions about a 85 iroc 305 tpi

I agree with 85whtz28 the 870 to 165 is a great upgrade to do right off. If your needing tuning or a ecm lmk.

http://www.eecis.udel.edu/~davis/z28/ecm_swap/
Old 12-01-2012, 10:49 PM
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Car: 1985 Camaro Z28
Engine: 305 TPI
Transmission: 700R4
Re: questions about a 85 iroc 305 tpi

With my car it just made it run tons smoother by switching it over. After that I would probably go for headers and y pipe with your borla exhaust, or start from the ground up. Its always a good idea to start on a good platform. Sub-frame connectors and steering brace are highly recommended. Also you need to know what direction you want to take the car, what you want to use it for. This will determine what upgrades(if any) you want to do. There is a **** load of knowledge on this site, so dont hesitate to ask, we all start somewhere.
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