so heres the deal, Im looking to swap out the 305tpi in my 1991 z28. found a 1989 covette with a 350tpi thats being partted out. what all do i need from the vette to make this work or will it? or can I just bolt in the long block and reuse my currant tpi set up? please let me kow what im getting into! thanks in advance. ps, I live in Californa an need this to be smog legal./...

 

You can bolt in the long block with your TPI stuff, but you will need the 350 injectors and a tune to do it (can't use the '89 "chip" - it's MAF).

If you get the entire TPI set-up including harness, sensors, and ECM, you can bolt that into your car (after changing the oil pan and pump). It won't technically be emissions legal, though.

 

I just need it to pass the test on paper... no one needs to know whats under the hood but me. yes id be gettin entire TPI set-up including harness, sensors, and ECM and trans.

 

im 99% sure vette trans wont bolt into our f bodys, or is that only C5 vettes?

 

i just negotiated the trans into the deal, might as well get a free tranny out of the deal...

 

To keep the "new" tranny, if you have a 700R4 & the new one is is 700R4, just swap the tailhousings out. If they are the same length, you can even just reuse your driveshaft.

 

All C4 Vette trans bolt up perfect ; same bolt pattern / same 153 tooth flexplate
C5 has trans as part of diff assembly

 

Vette T700 output shaft ( and tailshaft housing ) are shorter (3/4") so DS yoke may not engage splines enough if longer F-Body tailshaft housing fitted

 

In reality you can use the whole Vette TPI setup and only need to swap over the plenum so you have provision to mount the MAP sensor used on the 90 -92 cars.
(Could even remote mount the MAP sensor( like on trucks ) in which case Vette engine could go straight in without taking the intake off

Need a 350 SD memcal (chip ) to replace the 305 one in your existing computer and a 350 SD knock sensor to go with the 350 injectors mentioned above.
No rewiring / computer change needed

NB
The Vette '165 ECM will have VATS enabled so you would have to get a custom chip with VATS disabled anyway if you converted to the Vette MAF setup using the Vette wiring and computer

 

I want this to be as easy as possible, iv decited to slap the vett long block under my current tpi setup, so all i need then is bigger injectors, 350 knock sensor and a 1991 camaro 350ci/auto chip? thanks to all of you for your advice thus far!

 

OK, just found out this 350 engine is actually from a 1985 corvette with TPI not a 1989 like i thought, is thier any diffrence? Im still planning on taking the long block from the vette and just bolting all my TPI stuff on it, will I have an issue or are all L98 long blocks pretty much the same, I know that 85 did have a TPI on it, a two piece rear main seal, forged pistons and the valve covers are not centerbolt. i just ordered a cam and headders, please let me know if i should return them befor they get installed... Thanks

 

What cam did you buy?
85 has flat tappet cam ; not a roller cam like installed in the '89 and 91
What headers ?
89 Vette had alum heads with a D port exhaust

 

The heads are Iron on the engine i have.

Here is the cam thats on order:
BrandCOMP CamsManufacturer's Part Number12-388-4Part TypeCamshaftsProduct LineCOMP Cams Computer-Controlled CamshaftsSummit Racing Part NumberCCA-12-388-4UPC36584520399Cam StyleHydraulic flat tappetBasic Operating RPM Range1,000-5,000Intake Duration at 050 inch Lift206Exhaust Duration at 050 inch Lift212Duration at 050 inch Lift206 int./212 exh.Advertised Intake Duration252Advertised Exhaust Duration260Advertised Duration252 int./260 exh.Intake Valve Lift with Factory Rocker Arm Ratio0.425 in.Exhaust Valve Lift with Factory Rocker Arm Ratio0.440 in.Valve Lift with Factory Rocker Arm Ratio0.425 int./0.440 exh.Lobe Separation (degrees)112


Here is the Headders:
Edelbrock Tubular Exhaust Systems (TES) Headers
IROC, Z-28, T/A, Formula89-925.0/5.7L T.P.I. , dual-catA#68762

Thanks for your help, please let me know if this stuff is useable or if thier is a better setup. and if I will have problems putting this in my camaro.

 

It's all usable.

The '85 ECM wasn't so good, but I believe you can plug in an '86-'88 ECM with no problems. It is MAF like the '89, but has a 9th "cold start" injector that was deleted in '89 (and speed density started in '90).