Found a crate engine supplier here in Australia that sells a few engines. If someone wants to check it out and explain what he means buy NEW LT4 injection when the heading is LT1 injection. Might have to talk to him about that.

But my main question is can I just rip out my TPI engine and drop this LT1 or LT4 what ever it is and still use my 730 ECM and all the wirring? Would I have to buy a new wirring loom or could I re-use what I have now running the TPI?

What kind of a job is this to do? Not to bad or many many hours involved? Just some opinions if anyone has done this swap would be good.

Mike

 

I haven't done the swap personally, but I do know that the LT1 manifold has to have some holes plugged and relocated to bolt to a L98. The LT4 manifold will have to be milled on the surface where it mates with the heads or it will hit along the valve cover lip.
Good luck,
Charlie

 

wait, little confused.

you talkin about getting a LT1/LT4 engine, intake, or what?

 

no matter what it's gonna be a bit time consuming. if you're talking about just he intake you need a remote therm. housing, drill a hole for distributor and a few other alterations. if you're talking swapping motors, i believe you will have to to run at least an lt1 ecm setup. for mods to intake look up lt1intake.com.

 

LT4 heads will only bolt up to LT4 intake, vise versa I'm new to this whole reverse coolant stuff but I dont think the LT4 heads will bolt to the block too easily. If you can get it, I assume you could still use the TPI ECM.

 

Sorry to confuse most of you. But I have found out that the engine is basically a LT1 but with an LT4 intake.

The main thing I was also concerned about was being able to use the ECM (730) on the LT4 intake engine and apprently you can re-use the ECM so no need to get another ECM or wiring

 

The LT1 engine uses a crank position sensor, optispark module, and a few other things that are not compatible with the 730 ECM. Unless someone has come up with some sort of adaptive solution, you can not use the 730 ECM with a LT1/LT4 engine. Now, you can use the LT1/LT4 intake with the 730 if you have it installed on a 92 or older motor.

 

I would say to trash the whole TPI wiring and just buy a new one from S&P (www.hotrodlane.cc) or similar. There is no way the TPI wiring will work, just like S10wildside said.

 

I am guessing the engine is 1992 and newer block so the 730 should be fine along with the wiring.

Probably confused everyone but I think I got it sorted out

 

As S10WILDSIDE said. The entire ECM is different as well as the engine. The cumputer gets pulses from an "Optispark" crank trigger to fire each injector as the piston begins to travel up on the compression stroke. The engine has no distributor to send pusles to your 730 ECM. You will need the complete computer and wiring harness and lots and lots of prayers to make it work.

 

that is only if you are using the L98 heads. if you are using heads that are meant to be used with the LT1, you will have no problem bolting it up.

 

DID ANYONE READ WHAT THE GUY ASKED? HE WANTS TO RUN AN LT1 CRATE ENGINE WITH A TPI ECM. NOT JUST THE LT1 INTAKE... I M PO S S I B L E

 

Why not just drill the intake and install the TPI distributer in the lt1 and ditch the opti-spark? Then the TPI harness should work.

 

There is not a placement hole in the block nor does the cam have a gear to drive the distributor. Nor is there an oil pump shaft. The engine design prevents SNAFU.