is there any special mods? is it hard? or its just about swapping the plenum? is it complicated wiring? anything will help!
i want to know because my motor is a bit modified(aluminum heads high lift cam msd ignition headers etc.) and the thing is that its TBI n i cant find a perfomance tbi anywhere! people tell me to put 350 injectors but i dont see any difference just a bit a BIT faster(unless its my imagination) any advice will help...thank you

 

The wiring is a BEatch... Just go Carb. If u decide to got tpi I have a manifold up for sale.

 

i kinda thought so....im tired of wiring.....how much for the unit?

 

Go carb if you are planning to only use your car at the track or offroad otherwise it's not a smog legal swap. Check with Dyno Don he's done a few conversions and could either do it for you or lead you in the right direction.

If you are going to keep the TBI start reading on the TBI board, there are pages and pages of good info. For performance tbi's you can check out ebay and look for some 305/350 tbi's that have been bored out which would bring it to a bore of 50mm. Another option is to find a 454 tbi either on ebay or the JY which starts at 50mm and if you needed more airflow you could have it bored as well. Here's a local company that has performance TBI stuff http://www.turbocity.com/default.php?cPath=16_29. You will also need to either run a carb manifold with an adapter plate or have your tbi manifold bored to clear the oversize butterfly's in addition to lots of computer tuning.

 

I've done so many I have lost count, but it's not a cheap swap.

 

Yea. I was there to help with his latest. A cool El Camino. O.K. maybe I really didnt help, I was mostly standing around in his way and taking up his time. But it all the same.

 

Its more than just swapping the plenum, you have to swap the intake manifold too. And get a new computer and re-wire the wire harness. There is a sticky post in the TPI forum, as well as a tech article in the Tech Articles section of the main page of this website to help you get started.

Its definitely worth it. When Don did the swap on his former 92 RS, he gained 17 HP and 70 TQ at the rear wheels. And that was a stock engine. You should gain even more.

 

hmmmm but how much would it cost ME if i had it done at a shop or if mister dyno don did it for me?

 

The answer to your question depends on a number of issues. For instance, do you have all the parts for the swap?

Once you've collected all the parts, take a number and get in line. You don't want anyone but Dyno Don doing this swap.

This isn't a swap for amateurs.

 

aw man i guess i should LOL!!

 

I also want to do that swap on my car you should as birdtojag he was gonna guide me but my harness is not complete

 

dont forget fuel pressure get ready to take that tank down and open it up youre going to need a new sending unit, one out of a v6 MPFI will work and youre also goin to need tpi fuel lines, they do sell piggyback harnesses to convert tbi harness to tpi, in my opinion adding a cam and a 3.73 posi in the back should wake up that L03 also Holley TBI Throttlebodies seem to look good your also going to need to change the throttle and kickdown cables and if you want to keep crusie control, one of them too

 

look when you get the tpi make sure you get the full wiring system. that means every wire to the firewall and behind the firewall.
and i mean every wire.
not one cut wire and no aftermarket wires.

 

My tpi harness that i have does have some wires vut but thats why i am looking for another one can i just buy one from painless

 

you could actually send ur harness to painless wiring to get it wired its prob cheaper??

 

If you are absolutely sold on going TPI vs. TBI which you currently have, I would have to try to dissuade you. Stick with TBI, it's pretty much like a carb already. There are tons of aftermarket performance parts and services for TBI, and unless you have a deep pocket and high tolerance for extensive tuning, don't try this conversion. That's my opinion, take it or leave it. In any case, good luck with your camaro!

 

+1 on the TBI build up. For the money you're going to spend on the conversion you would be half way to getting a complete TPI car. Then you could have one of each.

 

I already changed my mind because i seen many of the people i know that do this swap have more problems so i am just gonna go carb

 

would you happen to know any good tbi mod. people around our area? i wouldnt like to deal with shipping n out of state just because im having issues with the stupid post office... for a while they complain bout me having dogs when i dont even own a dam goldfish!
ive taken them to my house for inspection and still i get complaints

i just dont want to lose the pakage
-thanks

 

Ummm I already posted one in my first reply.....Turbo City.
That are located in Orange Ca

 

i actually missed it!
just checked it out!
and im convinced...i think ima go for the purchase!
hopefully this will let the hidden beast out of my car....since its always givin me issues since the modifications....
cant wait!

 

How many 12 second TBI cars do you know of? I dont know of any. The only decent one I've seen was a 383 TBI that went 13.20 at Fontana. Every other 350 or 305 highly modified TBI I have seen makes around 250 RWHP and runs mid 14's. Same as a stock L98. Nobody builds 2-barrel carbs for a reason, and a TBI is just a 2-barrel carb.

I've also never heard of anyone who swapped their thirdgen from TBI to TPI and regretted it.

 

In theory a modified TBI injection system can support more horsepower. That would be with larger bore throttle body, higher flow injectors, higher flow fuel pump, and higher pressure regulator.

Of course it won't make more horsepower than the engine is capable of.

 

there is a difference in intakes first of all 86 and down and 86 and up the 4 middle bolt holes are on a different angle so 86 and down tpi's need 86 and down heads and 86 and up tpi's need 86 and up heads.so dont get caught with that dilema i learned the hard way.the wiring harness and computer has to be changed as well.not hard just tedious.still in the process of conversion so havent run across any more issues yet hope that helps

 

so did you ever make the conversion from tbi to tpi

 

Talk to Dyno Don before you go with Painless. Painless ain't so painless.