Fellas I need some help and some information on doing a swap from a TBI to a TPI. I have a 305 TBI now and i would like to go to a TPI setup...is this a good decision or no...and will it be worth my time and money. What kind of suggestions could yall give me on this setup.....maybe some ideas on what to look for and what I need to make this work. I've got my eye on a TPI for like $500 bucks but, it comes with alot of stuff like sensors, harness, fuel pump, computer, distributor, and lots of other additions. Give me some heads up on this deal fellas I would really appreciate it.

 

ok first, WELCOME TO TGO! Hope you enjoy it here.

With that said, you should take a quick look around as im sure there are 20384023840284028 threads about this, but I will give you some insight.

Depending on your goal for power, TPI might not be the best option. TPI overall is very good, but there are systems out there that put it to shame. If your going with a good street motor that you can just pounce around town with, your good to go.

Find a TPI set that has all the harness. I sugest spending some money and getting new injectors and sensors as even the newest third gen is 11 years old. Thats just a me thing so i know that everything is 100% good. Then you have 2 options, mass air flow systems or a speed/density system. MAF and SD systems are the only 2 types made. All TPI is almost all the same, only a few sensors and the injectors varry from 305 to 350.

few high lights
85 is the first year of TPI on Vettes and Fbods. Its a MAF car. MAF uses a sensor that measures air incoming into the engine to calculate fuel rate. This year is treated kinda seperate from the rest of the maf cars because of a few different things.

86-88, TPI cars used MAF and also have a cold start injector aka the "9th" injector.

89 is the only year MAF and no cold start injector was put on cars

90-92 GM went with a speed density system. This meassures manifild pressure instead of air flow to calculate fuel rate. It gave the car 5 more hp... somehow.

Each system has its highlights and drawbacks. It is fought about a lot here in this section.
Do a search around this section and around the board.
good luck with the car and again, welcome to Third Gen.org!

 

well since you already have a 92 it would be alittle easier to swap in a speed density system.but a MAF system can be done as well.
my advise would be to buy ALL new sensors!i went through this swap last year and i wish i had done that.
the fuel pump needs to be changed out so if your going to through the hassel of dropping your tank you NEED to buy a new pump.
make sure you know what year and what size the motor was that the intake came off of.so you know what style intake you have and what size injectors you have.
if you look hard enough you'll find a complete TPI intake for less than $500

feel free to PM me if you need any help.

 

Guys I appreciate the heads up on the situation. I am looking for more power out of my 92'. I have already swapped my stock rearend for a 96' disc brake .342 rearend. I have also made a few mods like front and rear WS6 swaybars and a steering box brace to go along with my 17 inch SS wheels with 275/45/R17 all the way around. Soon will be adding subframe connectors and some rear end mods if i need them. Should I get subframes or no? Heard they make the car ride like a box spring. Thought about converting to an LT1 setup but the money just isnt there. Id like to add power to my car so the TPI setup is a little more price wise for my taste. Should I look for a SD system out of a 90' to 92' or would an older TPI do just fine? How much power could I possibly gain if I were to port and polish the plenum and what other mods could I do. I dont race my car much but I do like to play around with the fellas. Just looking for a little more power out of my baby, thanks for the help guys.

 

YES!their probly the best thing you can do for a Thirdgen
one of the great things about converting to a TPI setup is that if you deside to upgrade to a Stealth or an LT1 intake the wiring is already there.
in my opinion you should.your life will be alot more simple.
horsepower wise the stock L03 is 170 horse and a stock LB9 is 210 horse.

 

Hey BigAls87z28,

I'm getting a good deal on a TPI setup off of a 92 Camaro, which wouldn't have had MAF? Correct?

Does that mean it doesn't have that MAF Sensor to worry about?
I can just put a filter in front of it or cold air intake not having to worry about it right?

I am going to by a new wire harness and maybe new computer too.

I'm in the process of rebuilding a 350 with Vortec heads, any suggestions on Cam, pistons to make some good 1/4mile times?
I already have what's listed in my sig on the car.


Thanks,

 

you are correct sir!!

 

what he said!

 

Any suggestions on setup?

 

about your SD set up? Yeah.. DONT PUT A FILTER RIGHT ON YOUR TB!! That will just allow for your engine to suck up the sweet sweet hot engine bay air. Your better off keeping with the dual snorkle set up as it is a very good design and you wont be able to flow more then that using a CAI... maybe that dual snorkle from SLP. SD doesnt like huge cams because of vaccum.