Douglast47

I have a 1992 Chevrolet Silverado with a summit crate 350 in it but it's blown so I'm buying a new motor and I found a lt1 out of a 93 vette. I have a 700r4 tranny and I would like to know if I buy the lt1 would it go in my truck just fine or would I need anything special? I'm not the best mechanic and are unfamiliar with alot of stuff but I just want to know if I need anything different to make the lt1 fit. Thanks!

93M6Formula

It will bolt right up but you do realize you need the wiring harness to make it run right? Unless you're going carb, but it's hard to find the GMPP intake for these any more.

Ed Wright

iTrader: (1)

Harnesses are easy to find. You will need a '93 F body LT1 computer also. The VATS (anti-theft) will need shut off in the chip. I would find one at a salvage instead of buying a re manufactured computer. New ones are no longer available, nor are the factory "chips". Get one at a salvage, and it will have the chip (MEMCAL is the proper name for it) which can be erased, and reprogrammed for no VATS, a 700R4, and any emissions delete you may need.

ChevyOwner

The 93 ECM will be hard to find. I suggest looking for a 94-95 harness and PCM.

Ed Wright

iTrader: (1)

One, that PCM does not support his 700R4 Trans very well, and the '93 has a different Optispark and injectors. That would not be a real good move. I work for a lot shops that do engine swaps. The '93 would be a better deal for him.

96capricemgr

iTrader: (1)

I would just call it a bad idea unless he was more capable than he has said he is.

Ed Wright

iTrader: (1)

I did a chip for a guy here in town that did that very swap. Made a very nice running little truck. Faster and better gas mileage than the original TBI engine. Does sound like he should have it done.

Paul Bell

iTrader: (9)

As I recall, the 1993 F-body used the 700R4 transmission (or called the 4L60 {no"E"}) so Douglas might be better off going with the 1993 ECM. It wasn't a PCM yet as it controlled the engine only, not the entire powertrain.

Ed Wright

iTrader: (1)

That is the point I was trying to make. Thanks Paul.

guppymech

iTrader: (7)

You got me worried for a second but that manifold is in stock at Summit and Jeg's among others.

Paul Bell

iTrader: (9)

A question for the OP: Is the blown 350 in this truck still running on the factory TBI system?

If yes, using the carb intake on the LT1 engine allows using the stock TBI (you'll need an adapter) and HEI distributor.

You'd need to remove the optispark and block of the hole at the cam for it and retain the LT1 water pump (as the LT1 is reverse-cooling, a good advantage).

The TBI ECM would still work well as it's still a 350.

Paul Bell

iTrader: (9)

http://www.summitracing.com/search/P...eted-Manifold/

96capricemgr

iTrader: (1)

If someone has parts and knowledge the LT1 is a nicer engine, but if paying for a bunch of custom work without absolute proof the local shop can handle it.....................

Paul Bell

iTrader: (9)

I don't see this as much custom work. Carb intake, TBI adapter, pull the opti then treat it like any other small block.

93M6Formula

Hmm guess i haven't looked lately lol. I thought they were discontinued.

ChevyOwner

If the ECM for the 1993 Camaro is as hard to find as unreliable as the ECM for the 1993 Corvette then it should be avoided. As for the optispark IIRC you can change the wire harness to the 94-95 style and it will work. With no electronic control on an automatic I understand you could program the 94PCM to manual, and it will work.

PS
The only injector difference I know about is the change from batch to sequential, and that would be handled by the 94 engine harness.

Ed Wright

iTrader: (1)

The injector flow rate is different. That would require more tuning. Programmed for a manual transmission does not control the TCC very well. Millions of '93 LT1 cars running around with zero ECM problems. Doesn't sound like your business, whatever it may be, doesn't deal with a whole lot of engine swaps. I work with street rod shops all over the country. 1994 PCMs with 1993 LT1 engines and 700R4 trans is not how anybody I work with does it. Of course, you may know more than the pros who do this every day.

lt1-xjs

The LT1 swap is a great way to get good reliable power when done properly. The whole purpose is to take advantage of the fuel injection. Any deviation will reflect in performance and reliability IMO. I would advise having the engine, harness and ecm from the same car.

ChevyOwner

I was unaware that ls1tech.com was only for businesses. Millions eh? How many 1993 Firebird Formulas, Trans Ams, Camaros, and Corvettes were made? I don't know but I doubt millions.

Well seeing as LS1tech.com is not for the general public i guess I'll leave you and your condescending attitude alone along with LS1tech.

93M6Formula

You sure won't make it far in life with thin skin like that... Ed is one of the most knowledgable members here, He knows what he's talking about.