I just purchased a 97 camaro LT1 with 6 Spd trans for my camaro. I am concerned about wiring. Does anyone know who can modify or who sells a complete harness for this engine. I believe it is 96-97 only because of a theft device with the engine computer. Any help would be greatly appreciated.

Hey 68 LT1,

There are people who make the harness for the LT1 but the good ones cost about $800.00.I bought the books from G.M. they are about $200.00,there is a 800 # to get them from and I don't have it handy here tonight. Call your local G.M. parts man and he will have the #.

I have put 9 LT1's in this year,all were conversion type instaliations. Most of them were Jaguar, however I did do one 68 Camaro,you will not be sorry for your choice on the LT1 as this is about the only thing that I have been impressed with from G.M. since 1972. Don,t get me wrong I am G.M. through and through it's just that the LT1 is an excellent engine.

The LT1 that I put in the 68 has 4:11 posi and gets 17 mpg dogging it out,and in the 20's highway.

I can get the vats (anti thieft box)also to make the engine run on the orignal (ECM) computer.It's not that expensive.

Back to the G.M. books,with these books the harness is not that hard to do. I can modify the harmess and hook up the relays on these in a day to day and a half. I haven't done any except to the car I am installing the engine in because of location of ECM and relays.

I could go into much more detail here but I'll wait and see how much interest this creates.

I will make one more statement then close; I never never thought I would use any thing but a carb to gas an engine, but in the case of the LT1 the factory F.I.it is the best thing I've seen since sliced bread. I still am not sold on ANY of the after market F.I. systems but the LT1 ROCKS.

P.S.
These engines love low gears,like 4:11's or so.

Larry

I would love for INJSTREETRODS to expand on the topic of LTI into a 68, i am in the process of locating a good LTI, and would really like to make sure I know what I am getting myself into. Might also like to see if you do these wiring harnesses if somone were interested (I'm in the DFW area)

[This message has been edited by JPs68 (edited 03-30-2001).]

After 95 it turned into OBD2. The VATS is on all the LT1 ECM's, not just 96+. If you don't want to use the factory harness, TPIS sells a complete harness for 475 bucks. It took me 50 minutes to have the LT1 wired up for my car. Do a search on this topic, it has been covered a bunch of times.
Tyler

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68-LT1-T56
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Hello every body,

I didn't die I have just been busy trying to make a living.

Well The LT1 count is now at 13 done and more in line. I was in the process of doing a Lt4, and super charger, hoping for + or - 600 HP. I thought I had bought a new crate LT4 and intake off of ebay, but it apears I have been burned. In case any one might be interested this guy's name is Michael Kaido, from Marietta Ga.I really need to find him or my $ 4350.00. If any one knows anything about ebay fraud please let my know.

Now for the LT1 stuff;

The Camaro LT1 AC compressor will not clear the cross member without mods. I like the looks of the Camaro set up better. If you use the Vette set up the Comp is not a problem, but not as good looks wise to me.

If you use the 4L60E tranny the 4 SPD cross member is most desireable, and GM still sell them.Even with this cross member, there needs to be a mod done to clear the tranny pan. This will be a cut out or heat and dent from near center out toward the pass side.You will also need to extend the shelf on the cross member that the lower side of the mount bolts to, about 1 1/2 inches. I have the part # but not at home.The tail housing needs to be the one with the rear mount on it. These are from the Caprice, Buick Roadmaster, ect. The 6 spd is much more involved, to long for here.

As for the harness, I redo the GM harness, as it is a good harness. I have not started taking just the harness in to do without the car yet.I have also thought about making up directions. I think most any one can do a harness with help, and besides time spent on your streetrod is NOT money spent right. But if you have to go buy an after market harness that's money spent. Buy your engine with a harness.

When looking for your engine be sure it has the harness, accesories, air intake elbow, mass air flow meter, flywheel, starter, and electric smog pump if your car takes a smog pump.

If you are going to run an auto tranny be sure your setup includes the 4L60E tranny that came with it, or that the orig set up, and ECU are for the auto tranny.This stuff will just all plug in from the orig harness, and the E tranny works super.

Not to put in an add here, but I can rebuild your tranny if you are in need.

The drive shaft will need shortened. Normally 2 1/2 inches but I always wait and measure it.

The throttle is a snap. Try to get the orig throttle cable, cut the end button off the cable, so you can pull a foot to 18 inches of the cable up inside the outter housing, when this is done cut the whole thing off just a little past the back of the engine. Now feed the inner cable out, and you should have plenty of slack to reach the orig throttle arm. Get a cable clamp like goes on a Briggs throttle cable. You may need to drill the hole out just a little where the cable goes through. a 7/16 Snap-On socket will just fit in the butter fly to hold it wide open, be careful not to let it fall in. Now put the Briggs end on the cable, hold the acc pedal down, and line the hole in the back side of the clamp up to the hole in the acc arm. Now get a short screw go through the hole in the arm into the back side of the clamp, be sure there is enough room for it to pivot, if not get a longer screw. If it can't pivot it will break the cable.Cut off excess cable.

These engines have no fan pulley, or fan, they must use electric fan/fans. The ECU will control them, but you must use relays. These engines also have reverse circulation on the cooling system, this means the thermostat side goes to the LOWER hose.

I use an after market inline fuel pump, as all ele fuel pumps it must go as close to the tank as possible. The ECU also controlls the fuel pump relay. As many think the oil pressure sender must be involved in this circit, that is not true, the only thing that is done here is that this is a back up incase the FP relay goes bad it will limp in.

Some fear the OBDII system because of check engine lights. The things that cause the check engine light to come on have NO affect on the run, and drive ability of the engine. Example; There is an O2 sensor behind the rear cat, emissions only (for 2002 emission check)this stuff will have to work in places like Calif, but who wants to run a cat on a first gen LT1 in Texas, not me.

If you are thinking of using headers, be SURE they are for D port heads. I think a square, or round port header is worse than the stock LT1 manifolds.

Well there is more but it's late, and I'm tired. Ok ok I'll post the part #'s tomorrow, I don,t have them here at home.

Happy reading, Larry

Ask me if you liked to know how much fun i have had,to do LT-1 Project with Larry!!! Hes the MAN with LT1s!! http://www.camaros.net/forum/smile.gif

Joni

Does anyone know of anybody close to the San Diego area who does LT1 conversions?? Thanks in advance...oh and LARRY...you are the man with LT1's. I just dont know how feasible sending my camaro across half the US is right now though.