killain

How complicated would it be to convert a 84 cross-fire to a 85 or 86 TPI injection setup? I know the wiring harness and the CPU needs to be changed as well as the fuel pump. I was thinking about doing a GM crate engine and then continue on with a conversion to TPI. Is this something 'do-able' or am I just looking for trouble? It sounds like it wouldn't be so difficult! :chevy

Ramanstud

that's what I thought.


:banghead:

killain

Can I assume that this is something you know a little bit about?

CFI-EFI

If you have time and money to burn, or simply want experience twisting wrenches, it could be a fun project. The early L98's with similar to the L83 long blocks, were no ball of fire, either. This would be a lot of work for a disappointing gain. The small "adaptive" parts will likely out number the major components necessary. Good luck, and...

RACE ON!!!
1984 Crossfire
Member NHRA

Frizlefrak

If you're gonna go with a crate motor, why not just put on an X-Ram and bore your throttle bodies? It would be a hell of a lot simpler than doing quadruple bypass surgery on the electrical system of your car, and it will run just as well, or better, than an early TPI. Just a thought.
http://www.x-ram.com/


[Modified by Frizlefrak, 11:52 PM 5/21/2003]

grumpyvette

the stock 1984 engine had about 205hp
The new L98 engine increased horsepower from 205 to 230 plus a gain in fuel enconomy due in part to new Bosch fuel injection with tuned runners. bye 1991 the L98 was up to 245hp!
theres very little advantage to swapping to a TPI intake, everyone I know thats useing a TPI engine wants better airflow, your stock cross fire intake is totally out of airflow by about 4000rpm, the TPI only raises the rpm level to about 4700rpm where it also hits a flow wall resticting the engine, your far better off swapping a few parts on your 1984 like in the post listed below

http://www.crossfire.homeip.net:81/c...nate+Induction

look at it this way, youve got a known good corvette that lacks power, drop about $2000 in the listed heads,cam,intake and your about 115 plus hp ahead, (thats a minimum of 320hp)(youll really be much higher its just that that hp level,is a almost total no brainer) a totally differant engine, if your into even more hp, install a 383 kit with 10.5:1 cpr pistons. either way youll leave stock TPI cars seeing fast dissappearing tail lights. getting 350-370hp is not that hard!!! (especially on a 383 cid displacement ,AFR 190cc cylinderhead ,custom SY1,CRANE CAM EQUIPED 10.5:1 cpr engine with headers)

look at combo #15,#16,#17 http://www.ryanscarpage.50megs.com/combos2.html
custom lid on SY1

SY1 intake base


THE EXTREMELY RESTRICTIVE STOCK INTAKE

GRX

What kind of money are you looking to spend? Why not plant a supercharger on it? Forum member Joby did it to his 84.... :steering:

yoslambo1@cs.com

Been there done that! :smash: Slap a differant intake & carb on it & you will be very happy! :yesnod: :cheers:

Lionsden

If your going to a different form of induction the swap to carb would be easiest. If you do go tpi find a donor car for the accessory brackets. Some are different as well as the power steering resevoir being relocated.

A few modifications to the crossfire or a change to one of its varients will have you running with the majority of the tpis and you keep all the advantages of efi.

FD2BLK

[Modified by Frizlefrak, 11:52 PM 5/21/2003] Been there done that! :smash: Slap a differant intake & carb on it & you will be very happy! :yesnod: :cheers: [/QUOTE]

:iagree: Before I got my LT1 motor the best performance and relibility mod I ever made was a used $50 manifold and a new carb. The cross fire is just dead at about 4500 RPM. The person I sold the motor to has put a TPI setup on it and is prety happy. He bought a used harness off e-bay and sent it to Jims performance and for $150 they made it a stand alone harness.

killain

Ok Thanks. So I'd be better off rebuilding the L-83, doing some minor upgrades during the rebuild and then putting on an X ram and maybe a better exhaust? I'm only looking to gain about 50 to 60 extra hoursepower?

Ramanstud

I am in the middle of the "Swap" as we speak... and I even got the damn thing to idle for a few seconds. Have no fear, my real issue is with my pressure regulator and a few other things, but the swap itself wasn't really all that bad. but like all engine swaps, there will be some customization along the way.

I cant get too much more involved since I technically haven't got my to run yet... :D But if you want more info on the Swap email me privately and I can give you a total break-down of what's involved. For what it's worth, I would agree that you'll want a hi-flow TPI to make it worth your while, and that's a lot more $$$. Basically buy a superram and a wiring harness- the rest I can fill you in on.

:cheers:

killain

See I was thinking that the cross-fire to TPI swap would allow me to work up to say 275 HP. But if I can get the 275 horsey's with the cross fire and an X ram maybe I'm better of going that way? I don't know. What do you think? And does anyone know of a comprehensive list around about modifying the cross fire to acceptal horsepower for todays driving. 205 HP and a 3500 pound car just doesn't mix well. I'm kinda new to the rebuilding and modifying of engines.:bb

Frizlefrak

What you really need to do is mosey on over to the crossfire forum, register, and post the link to this thread. Read the tech articles and the FAQ section. You will be amazed at the amount of L83 info they have.
http://www.crossfire.homeip.net:81/c...artdefault.asp

I think your goal of around 275 HP is VERY reachable with the crossfire, and you will still be able to pass emissions and won't have to do a hatchet job on the car.


[Modified by Frizlefrak, 3:31 PM 5/23/2003]

killain

Thanks, I head on over and see what kind of response I can chase down!