yaretheytaken

iTrader: (2)

I have a 92 RS with a 350 Carb'd and in the next few weeks I am going to be starting the process of converting it to TPI. I know that in order to do this I am going to need a new fuel pump. So I have a few questions for you guys:

1. What kind of fuel pump do you suggest I get.
2. Do I need to replace any thing else in the fuel delivery.

I have already purchased a complete TPI setup which includes everything; wireing harness, injectors, upper and lower plenum, etc.

Also, if anyone that has done this swap has any tip or tricks to make my life a little easier I would appreciate it. Thanks in advance.

84redta

iTrader: (34)

You will need a fuel sending unit from a TBI or TPI car with a 40 PSI fuel pump. Also if you switch the lines to be on the passenger side for the mechanical fuel pump, then you will need to bring the lines back over to the driver side, with flex lines going to the motor fuel rail.

tinymay

I had to run a return line too. You'll see two fittings from the TPI fuel rail. Both go to the tank.

If you go with an external fuel pump like I did, make SURE to get it as close to the tank as possible. Makes a difference.

And filter before the pump. I goofed on that one too. You'll do better.

84redta

iTrader: (34)

His is a '92 RS, assuming he kept the '92 tank and just left the return line unused, thats why i didn't say it at first.

But yes, if it was removed, then you will need a return line.

yaretheytaken

iTrader: (2)

Thanks for all the info so far, I will let you guys know how it goes as I get started. It may be a little bit before I start though, because my car is currently under about 5 inches of snow .

vette9190

iTrader: (2)

You will need the Throttle cable and if its an auto the tv cable for TPI they are diff from carb/TBI as is the cruise cable if you if you want it. also the fuel tank sender cam come from a TPI v8 or a MPFI v6 firebird or camero not a TBI though the sender is different. Also the fuelpump from a MPFI v6 will work too. If you kept the wiring in the interior of the car you will need to change some pinouts on a few connectors. Checkout
www.austinthirdgen.org for wiring diagrams. the rubber lines that go from the frame to the fuelrails afre diff aswell. You will need to change c207 also known as the IP connector snd eliminate the vss bufferbox. it yellow and behind the dash a few inches from the ecm. also need to take a few wires out of that connector to reroute them to c207. I did this swap on my 91 I used the TPI from a 90 firebird. It is highly recommened to use the TPI from a 90-92 car asthere will be less wiring changes to make and the There is more available for tuning on a 7730 ecm. I tried to swap in the maf setup but it required way to much pinout changes for me and the SD Systems are said o be beter then the earlier MAf systems.

yaretheytaken

iTrader: (2)

A little update on my progress. I got the dash out of the car. This weekend I will be removing the existing wiring harness and I am going to start on the fuel pump. I want to get a stock-ish cam for the car, one that won't require a new prom (if that is possible) any suggestions on that would be appreciated.

yaretheytaken

iTrader: (2)

I got the old cam out and the new cam in. Now when I was installing the tpi intake manifold the old knock sensor was in the way, so I removed the old knock sensor and tried to install the new one but the threads on the old one were way smaller the the threads on the new one. As stated before the motor is a 74 350 and the knock sensor is for a 92 Z28 5.7.

aldixie

iTrader: (2)

That doesn't sound like the knock sensor but the oil preasure sender. The knock sensor is located at the bottom of the engine just above the oil pan on the passenger side.

machzee

Get a 3900 ohm resistor and by pass the knock sensor ( as forrest gump says one less thing )

yaretheytaken

iTrader: (2)

What would I have to do to bypass the knock sensor with a 3900 ohm resistor?

machzee

Go to radio shack buy a 3.9 k ohm resistor find the knock senor wire in your harness, strip the wire and solder one end of resistor to it, solder a eye connector to the other end and ground it to the chassis, perfect knock signal all the time.

yaretheytaken

iTrader: (2)

I was going to put my new harness in my car over the weekend when I noticed that the new harness had some connectors that were broken I have identified 2 of them but I need help identifying the other 3, for now I am just going to describe them I will post pictures later.
1. This one has 2 wires one is red the other is white, it has two "prongs" sticking out of the top.

2. This one has 4 wires, not sure of the colors right now, and it has four "prongs" as well.

3. I can't describe this one at all, will post pics tonight.

Thanks in advance.

darbysan

Go to these websites for info on connectors:

http://tpiparts.net/82_92_camaro_wiring?b=1
http://www.eficonnection.com/eficonn..._pigtails.aspx

Also, the sensor you were replacing at the back of the engine was the Oil Pressure sensor for the Choke. You will need an Oil Presure switch in it's place. This provides power for the Fuel Pump when Oil Pressure is present. You can get a "Y" connector so that both sensors can be installed.

HTH

yaretheytaken

iTrader: (2)

I have a few questions regarding the TPI. I have a tpi setup off of an 86 and my Harness is out of a 90, am I going to run into any issues with connectors being different? Also, on the front of the intake manifold there are 2 sensors what are these 2 sensors. Thanks in advance.

John

darbysan

I'm not a complete expert, but I'll give your questions a shot. Using the 90 Harness will be OK, assuming you have the '90 ECM ( 730 are the last three digits of the part number), but you will need to get a MAP sensor. The MAF sensor you have from the '86 will not be used. The two sensors in the front of the manifold are 1( Temp Sensor for the ECM, and 2( Cold Start Switch fo the '86 Cold Start. You will not need the Cold Start switch ( this is a good place to put a temp sensor for the Electric Fan Control if you need one). You will not need the Cold Start Injector or piping on the driver's side of the Plenum. You can get a Cold Start Delete Kit on Ebay for $30, or if it is not leaking you can just leave it alone. You should not need the MAF relay or the MAF Burn Off relay. However, they are inter-wired with the Fuel Pump relay so some re-wiring might be required.

Hopefully, others smarter than I will chime in as well.