Ok so heres the question for everyone I have 1975 pontiac 350 block with 6X heads waiting to go into my 92 which I was gonna use a 454 TBI unit and a chip retune on. I am still about $700 or so away from making this happen.

I know the big thing now a days is the LSX swap..... However a buddy of mine has a 1993 LT1 camaro with lower mileage this thing was cherry and has every bolt on you can think of installed and was supposed to be putting out close to 400hp+. Which I drove the car once and believe it. 3 days ago he got cut off on the freeway spun tagged the wall and totaled the car. He forgot while he wasn't driving the car in the winter he had taken full coverage off.... So its a total loss for him.

I could basically get the LT1, entire drive train and wiring harness for free or next to free. He also has a brand new in the box hot crane came and lifter set that would come with it. SO my question to the LT guys is should I do the swap and sell of my poncho parts or go ahead with my poncho build and pass it up.

Me and my buddy are pretty mechanically inclined and I am not afraid of wiring.

 

Go for it but try and changing over to a ls1 wiring set up for the lt1. http://www.eficonnection.com/eficonnection/default.aspx

 

If the only choices are hybrid TBI vs lt1, then go lt1

Rockjay has a good link for the lt1. You need a new harness/PCM since it'd be silly to use the 93 control system

 

keep in mind that the 1993 LT1 is the odd ball.

 

Why would it be silly from what I have been reading its a simple matter of splicing the two harnesses together? Or do you mean more from the standpoint of tuning it would be easier to use the later computer?

What makes this particular lt1 more oddball?

 

It's the oldest gen II control system, and the common 94-95 system is much easier to use

The 93 lt1 intake is different, but not in function. The engines are basically then same

 

I think the intake has been updated to the later one cause it looks just like every other lt1 intake I've seen and it has a bbk throttle body on it already.

 

I did the LT1 swap with a 96 motor less than a 100k on the motor. I went throught the motor based on what I have seen on forums about the bearings and premature wear in them and I am glad I did. Every main bearing in the motor was down to copper. So I pulled the heads and discovered another lurking LT1 issue, leaking head gaskets. I had the crank checked and refinished to make sure the journals were round, slapped a new oil pump and some Clevite bearings, had the heads cleaned up and machined flat, then got some of the thin felpro head gaskets.

I guess the moral of the story is check those things before slapping it in. I dont regret my LT1/T56 swap choice, but if I had to do it again I would go the LS route.

 

The lt1 platform is a second generation SBC. The old SD system has more in common with SD TPI than lt1's. All other lt1 systems are sequential with extensively more flexibility and control

 

SO basically the reason for switching to the 94-95 for tunability and sequential fuel injection (hair more power and economy). From what I am seeing 94~95 has the obdII port but is still OBD1. Do the computers still require a new chip or are they reprogrammable? Also does this make for tuning issues? I used to know a guy with a 95 and he had a hell of a time getting scanners to work with his car we had one of the old actron units (10yrs old now) and it was the only one that would work with his.

 

94-95 is the oddball OBDII connector that is actually OBDI. I heard the tunability of hte PCM is easier since it is OBDI and is easier to manipulate. Some say you can even get more power out of one, I for one like the 96-97 OBDII setup since if I have an issue on the side of the road somewhere any advance or autozone can scan it. Makes it easier for me. The 93 uses an old school computer and does not have nearly as much processor speed, ease of tuning or functionality of the later PCMs. The 93 also has a different OPTI, front cover, intake and fuel rail setup, and cam than the later ones. 94-95 had the vented Opti setup and no crank sensor making it an easier swap to a electric water pump and dual roller timing chain. The 96-97's have the crank sensor and are harder to get a double roller under the cover due to clearance. Heck it might not even be possible to put a double roller under the crank sensor timing covers.

 

On the stock cars, 94s had the obdi aldl, 95s had the OBDII aldl. Since this is a swap use whatever aldl you need. With 94-95 lt1 swaps, the factory 3rd gen connector is sufficient

 

Easiest solution for the 95 cans was to solder an obdi aldl in

 

we got the car from my buddies house last night yep the cars a lost basically the core support forward is a twisted heap, then fenders even moved inward towards the engine and you can see the cars frame is twisted as the door jams and rear hatch are off alignment.....

Good news is we got all that cleared and everything else is perfect and we got the engine to start up. So looks like I am gonna take the whole drivetrain and drop it into my 92 (engine, trans, driveshaft, axle and brakes.

Question for u guys on exhaust will the sbc headers for a 3rd gen work on the lt1 or do I need to get swap headers? I'm considering full lenth. He has pacesetters on the 4th gen now but my presession is they don't work on our 3rd gens.

 

One last thing I am still confused on is the 93 computer reflashable or do I have to swap chips everytime to retune it?

 

3rd gen headers will "fit" on the LT1, but some may block part of the LT1 exhaust port.

4th gen long tubes won't fit. 4th gen shorties will.

 

I run Dyno Don headers on my car with his Y pipe (He is on here) and they were a little pricy but good quality. It seems like a good system for my LT1, but if I recall correctly part of the port was being blocked last time I pulled the headers. The car runs pretty good so I have not made an effort to correct the problem.

I cant recall, but I am thinking the 93 PCM is a chip based setup like the previous GM computers. 94 and up were definately the newer PCM style units.

 

What about 4th gen mid length? And will stock 4th gen shortie Y-pipes work?

 

I'm pretty sure your right on that but I was trying to make sure. We're not even sure the 93 computer is the one in it as the OBDI connector is cut under the dashboard.