hey guys what do you all suggest for my engine harness i am doing a 305 tpi to 350 carb swap and i dont want to hack up the tpi harness so im most likely going to go to a u pull for one but im unsure as to what to get the harness from my setup is very very simple no a/c or smog stuff ....i think my electric fans are the only accessory on my engine harness i need (please correct me if im wrong) i thought about looking for around the same year of the car (89) harness and hacking that up but ide like to hear what you guys think first

 

why not put the TPI on the 350?

 

i wouldve but there seems to be wayyy more wiring than i wanna deal with and ive got everything to put my carb setup together where as i would need injectors knock senser module and computer either tuned or new comp...and when i get some more funds together id like to take the 350 to the next step wich will be beyond what the tpi can give me for 1/4 of the price .....but i do gotta say the tpi is A GORGEOUS system that makes great decor for the house lol

 

actually, the wiring would be the exact same as the 305, people use the same injectors for the 350's and the knock module and 350 prom would be cheaper than buying an intake and carb setup.

 

ive already got the intake and carb and the car is almost completely disassembled so the carb swap will be very easy with more power results plus the tpi wont like my flat tappet cam ...i originally wanted to convert the 350 to tpi but that idea is pretty much gone with the wind when i started looking into tuning equipment it seems really cool to be able to tune your car via laptop at that track but i just dont really want to get into that with this car .....there will be other and i will own a tpi car my dads 86 iroc is pretty impressive with the tpi they are very cool im not knockin them at all

 

kinda tryin to stick with the rule of kiss on this car (keep it simple stupid) i wanna have it reliable to drive to tgf next year for the 10th anniv. and there are too many little things that can go wrong with the tpi to trust it that far

 

There's no need to change wiring harnesses at all. All the computer stuff is in the pass side harness - you can tuck it all in the fenderwell or yank it all out (I tucked it to have spare wires for other things later, like fog lights).

Buy a seperate fan controller for your fans, you'll be glad you did. They use a probe in the radiator, you can get fully adjustable, switches for the dash, A/C provisions, everything - they run $35 to over $100 depending on the bells and whistles, very easy to wire in. I got a Flex-a-lite from summit (about $90) and I love it - best $90 I ever spent!

 

Personally, I'd say keeping TPI is closer to KISS than converting to carb.

 

hey 57kid just for ***** and giggles what do you think would be a better performing setup a carb (decent q-jet) with high rise intake and youve seen my cam specs before most likely if not let me know i could give them to ya again no prob and fresh 193's for the heads

or using the tpi setup with the 305 roller cam or maybe a hotcam with the 193's

or that tpi setup with the 305 heads from the tpi and a hotcam/or 305 cam

we gotta keep in mind my block is decked with flat topped pistons with VR

the block is still sitting on the stand with the crank rods and pistons in ...just havent ever completely decided on top end lol im mostly towards cam (ive got everything for it)

but ide love to hear your advice your a whole lot more experienced than the advice ive been getting from my machinist lol

 

193's aren't going to flow any more with lift past .45", so it doesn't make sense to put more cam than that in it.

Swirl ports and TPI are both made for low(ish) RPM torque. Not sure why the factory never put them together.

If you put in a lift-limited cam (less than .45") with lots of duration, you could get the carb to perhaps outrun the TPI.

Good news is the exhaust flows well on swirl port heads.

Maybe Atilla will chime in. He's put together a lot more combinations than I have.

 

well thank you very much for you input hopefully atilla will chime in ive been thinking about doing his 350 on his builds thread but i have all these parts now and i reeally want to drive this car i miss having my thirdgens and cruisin on the weekends or the nice days to work (with the occasional 1/4 mile in there)
the other reason i like the carb idea is thirdgen fest had soooo many tuned port cars and tuned port adapted cars ...im not saying that i dont like fuel injection or anything bad in that direction but i feel if im going to get into it i shouldve gone lsx

 

bump ..wat ya'll think?

 

bump

 

bump

 

Well, not to speak for him, but since he hasn't chimed in, he has said on several occasions that 193's are junk.

Member Fast355 would be the one to PM for advice. He's put together several swirlport combinations.

 

one last bump

 

I've seen a 193 headed 350, with F/T pistons, GMPP LT4 HOT cam, and the Prof. Prod. ripoff of the Performer RPM, wearing 1.625" long-tubes and no muffs, be unable to reach 310 horses. Same combo with Vortec heads will do 400. That's why I hate 193s.
I can't say much about the harness, but selling the TPI harness will make someone very happy. About all you should really need is the coil feed, and the wires to the alt. and the starter. For that, an '88 caprice harness would suffice. '88 was the last year for Q-Jet SBCs in any car, and it was the Caprice. Police Caprices had a Q-Jet on a 350, but only 210 HP.
The hottest engine from GM to ever wear 193s was the TBI 350, 210 hp at 4000 rpm in the early years, 310 ft-lbs in the later years.

 

Get an engine harness from an 84-86 ( maybe 87? ) Camaro. It's got everything you need to run a 350 carb set-up. If the donor car was a factory carb than then it might even have an electric fan relay. You might need to splice the 4 wiper wires because the wiper motor changed in 88,.......

Even 84-85 V6 cars ( carb and MPFI ) had an independant engine harness and can be used to run V8 carb applications with a few simple mods. It's better if the V6 had full gauges so those connectors don't need to be changed - but even that is pretty simple !


P.S. * Try to avoid 82-83 harnesses due to a complicated Wiper system !

 

You might want to check the computer harness out good. I have been told you could pull the computer out and shove the wires into the fender also. But what about the speed sensor? My 90 camaro speed sensor loops thru the computer and Ive already pulled it all out, now what?