Hi there..

I need some advice on what I need to convert my 305 carbed engine to a 305TPI.

the car i have, is 87 Camaro Sport Coupe so I have this computer controlled quadrajet carb.

I have found a TPI setup kit on ebay that I am planning to buy TPI Kit


I also need a new wiring harness on my car if i'm not wrong??.
Wiring Harness

And also I need to change the ECM and Prom I guess??
And what about fuel pump?..I guess I will need a bigger pump??


But my main question here is: what other componements do I need to complete my TPI setup. I am buying all of the things now so I can start on the covertion to the Fall.

And another question. Next year I may buy and Rebuild a 350 Engine. This TPI setup will fit that engine to right??.
I only need to change the injectors or what??

I apreciate every response I get...
Thanks

 

that thing is WAY over priced, you could buy a hsr or miniram for that price and be lightyears ahead. You will need a pcm/prom, wiring harness, all related sensors, etc. You will also need to drop the tank and install an electric fuel pump as well as wire it, I'm not sure if the wiring is already there or not.. I would suggest looking for a complete tpi setup that's for sale, they normally go for around $300 or so..

 

Yes the tpi setup will also fit a 305, you can install larger injectors or some have had sucess simply installing an AFPR and bumping the pressure up a little. You will also need a different knock sensor for the 350 and an appropriate prom, although it will run off the 305 prom, just not like it should.

 

honestly for the money and effort factors, i would not go TPI, but still ditch the computer-controlled carb for a non CC carb.

it is true that you would get marginally better gas milage with the TPI, but a well tuned carb wouldnt be very far off (the key term there is "well tuned" but it is totally acheivable with some time and practice).

then you wont have to worry about alot of things in the future, such as chip burning and the whole computer aspect.

if you were to do some performance upgrades, all you would have to do is simply rejet (i can rejet in less than 5 minutes) and maybe make some other adjustments.

however, that is just my $.02

 

Why must everyone say that to all of my plans???
this is something that argues me a lot.
I have written some threads on several things such as changing gears, coverting from carb to TPI such as this one...Performance on my engine and so on...And all of my "Plans" people just say don't do that or leave it to the pros

The only reason I am writing something at all at this Car Forums is to get information and advice on how I can go ahead to do things....

And on my car there is only TWO things I want. Better mileage and better performance. And I know I could do MANY other things if I wanted a performance car...But with our gas prices in Norway, that is just something I have to dream about.

To mention our gas price: 1 gallon regular unleaded fuel: $10.8

I am not kidding.

Do somebody understand me?..I just want some performance without getting much worse mileage. I have about 18MPG right now and I don't want any worse mileage. I think the TPI kit would help me out with this one.

I am not angry impaled but I just wanted to tell you all what I mean

 

sorry, i didnt mean to shoot you down, but when you are on a forum, you are going to hear a decent number of opinions. some in support, and some that conflict your ideas or have other recommendations. they are just that, opinions, they are what that specific person recommends you to do if they were in your situation.

the stuff that you are looking at is way too expensive i think you could find all of it for at least less than $500.

 

It's okay my friend. I didn't mean to be angry.
I still have my TPI plans..Mostly because of the Mileage and power.
And also I like the TPI also. I think that is a very good setup for engines.

I see there are several people thinking this is to expensive?..I am not sure.
I know that if I just buy a USED intake with everything that is NOT polished or powder-coated then it will be cheaper. And of course if I buy a used wiring harness from a Camaro.

But I just thought that this TPI setup here looks so nice when it was powder coated and polished. And if you look on the page the TPI setup is linked to there are a lot of sensors that is included on the kit.

The knock sensor I can use from my old setup, and the same with the O2 sensor...

But what about this Fuel pump?...I need a new fuel pump everyone says.
So I don't have this internal pump from before?...They are not so expensive I can see on Ebay, and they doesn't seem so hard to get installed either.
Just to drop the tank down and after that change the pump?...Do I need some other "modifications" to get the TPI running

 

Did you read my above post at all? Anyway what is your budget for this swap? A COMPLETE used tpi setup should run you about $300-$350 USD and come with everything you need for that price. Keep in mind TPI isn't exactly a performance oriented setup. If you have a larger budget than that there are better FI setups that you could shoot for. If you want to go TPI keep looking until you can find a complete setup or you will end up spending a ton of money on all the little things if you go to piece one togather. That polished one looks nice, but they want too much money for that incomplete setup in my opinion. You could always pick up one and polish it yourself too, I recently did this with a setup I have and it came out beautifully and it was my first time polishing anything.

 

As far as the fuel pump, yes you will need an electric pump. TPI cars came with an in-tank electric pump which you will need to install. Dropping in the tank in these cars isn't a fun job really since you have to move the rear axle out of the way. You will need to install the pump and sending unit into the tank. Also you will need to run a new feed and return line as I believe your car has a mechanical pump mounted on the block with lines that run on the opposite side of the car, however I'm not positive on that, maybe someone else can clarify or you could go take a look and determine? You may simply be able to cut and modify your existing lines to work..

 

how many miles are on your engine now?

it might not be too much more to get a low milage 305TPI engine for not that much more (assuming you could swap it yourself).

not to be talking down to the 305 owners, but at salvage yards around here the general consensus seems to be that 305's are valued more as boat anchors then they are engines... my point being that you could probably find one pretty cheap.

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sorry i forgot you were in Norway... shipping a complete engine there would be rediculously expensive. and i wouldnt imagine having too many SBC's sitting around in salvage yards...

oops.

 

My engine is about 85000miles now. It is a stock engine.
LoL, like you are saying I am from Norway yes, and to find a Camaro in the salvage yards here is not easy at all. Most of the cars people are trying to restore

Shipping a whole engine through the atlantic sea is a little bit expensive.
and if i'm going to buy a new engine here in Norway the price will be around
$5000 ++. It all depends on what you want to have.

The cheapest way for me I think would be to get the TPI kit and convert it on my car. THEN when my money is a little bit better, I will go for a 350 engine and rebuild it a little bit so I want to try to get a LOW mileage with a GOOD performance engine...I know a guy that has a 350 with about 260-270HP and has 26MPG in mileage. I think that sounds great.