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-   -   95'lt1 going into a 97' M6 ? (https://ls1tech.com/forums/lt1-lt4-modifications/1899860-95lt1-going-into-97-m6.html)

Joe Soucy Jun 4, 2018 11:02 PM

95'lt1 going into a 97' M6 ?
 
i got a 95 lt1 out of a TA and was wondering if the 97' computer and harness will work with the motor? i got a 1997 TA and wanna put my 95' 383 into it..

ss.slp.ls1 Jun 5, 2018 01:11 PM

I believe it should be a pretty straight forward swap.

Some differences that may need to be addressed is the crank sensor and the knock sensor.

I think you'll need to swap over the timing cover, crank sensor, and crank reluctor wheel, as well as the knock sensor over to the '95 engine.

BALLSS Jun 5, 2018 01:35 PM

^^^^ and also use the damper hub from the 97 motor.

The 95 block will have a NPT plug you remove on one side of the motor so you can install the 2 knock sensors from the 97 (one on each side of the block)

SS RRR Jun 5, 2018 01:44 PM

OBDII f-bodys don't have two knock sensors. Are the opti harnesses the same, or is a vented opti going in?

Joe Soucy Jun 5, 2018 03:15 PM


Originally Posted by BALLSS (Post 19909008)
^^^^ and also use the damper hub from the 97 motor.

The 95 block will have a NPT plug you remove on one side of the motor so you can install the 2 knock sensors from the 97 (one on each side of the block)

i was told that the only thing I'd need to change is the the one knock sensor on the block from a 95 to a 97 sensor and that changing out the hub to a 97 was optional. I'm really not wanting to change that damn hub out again it's kind of a pita

Joe Soucy Jun 5, 2018 03:16 PM


Originally Posted by SS RRR (Post 19909011)
OBDII f-bodys don't have two knock sensors. Are the opti harnesses the same, or is a vented opti going in?


arent 93-94 Opti's and 95-97 opti's all the same ? That's what I thought atleast .

Joe Soucy Jun 5, 2018 03:18 PM

And I am gonna be using the 97 harness and computer correct ? That's also what I was told . Nothing 95 related for electronics..

Joe Soucy Jun 5, 2018 03:40 PM


Originally Posted by BALLSS (Post 19909008)
^^^^ and also use the damper hub from the 97 motor.

The 95 block will have a NPT plug you remove on one side of the motor so you can install the 2 knock sensors from the 97 (one on each side of the block)

also what would happen if I just switched over one knock sensor instead of two? Is two needed ?

SS RRR Jun 5, 2018 03:42 PM

IIRC, if the 95 is vented then you should be good if using an OBDII harness/PCM.

BALLSS Jun 5, 2018 06:18 PM


Originally Posted by Joe Soucy (Post 19909080)


i was told that the only thing I'd need to change is the the one knock sensor on the block from a 95 to a 97 sensor and that changing out the hub to a 97 was optional. I'm really not wanting to change that damn hub out again it's kind of a pita

The hub on the 97 (OBD2 car) is shorter because you have a reluctor ring for the CPS. If you want your belt to line up you need to maintain your 97 hub on the 95 motor since you will use the 97 TC and reluctor wheel

Didn't know F body OBD2 LT1's only used one KS so if that's the case just use your 97 sensor in the 95 motor. Look up the TQ to tighten it. Don't over TQ it

Yes use your 97 PCM and harness

Joe Soucy Jun 5, 2018 06:25 PM


Originally Posted by BALLSS (Post 19909209)
The hub on the 97 (OBD2 car) is shorter because you have a reluctor ring for the CPS. If you want your belt to line up you need to maintain your 97 hub on the 95 motor since you will use the 97 TC and reluctor wheel

Didn't know F body OBD2 LT1's only used one KS so if that's the case just use your 97 sensor in the 95 motor. Look up the TQ to tighten it. Don't over TQ it

Yes use your 97 PCM and harness

is there any possible way I can run the 95 timing cover ? Because I just got done assembling my 383 lol and didn't know . Anyway I could delete some stuff to make it easier ?

Joe Soucy Jun 5, 2018 06:29 PM


Originally Posted by BALLSS (Post 19909209)
The hub on the 97 (OBD2 car) is shorter because you have a reluctor ring for the CPS. If you want your belt to line up you need to maintain your 97 hub on the 95 motor since you will use the 97 TC and reluctor wheel

Didn't know F body OBD2 LT1's only used one KS so if that's the case just use your 97 sensor in the 95 motor. Look up the TQ to tighten it. Don't over TQ it

Yes use your 97 PCM and harness

tbh I think I should probably just switch it over to the 97 parts just so I won't have any problems.. it's just a pain to take it apart again lol

BALLSS Jun 5, 2018 06:45 PM


Originally Posted by Joe Soucy (Post 19909216)


is there any possible way I can run the 95 timing cover ? Because I just got done assembling my 383 lol and didn't know . Anyway I could delete some stuff to make it easier ?

IDK if the CPS can be "tuned out" on a OBD 2 PCM. Ask your tuner

if you converted to OBD1 you can use the 95 cover. IDK what is involved in converting a OBD2 car to OBD1 but people have done it.

If plug in emissions is a issue for you, can't convert a OBD2 car to OBD 1 and pass emissions plug in test

if motor is buttoned up with 95 TC and hub...you will need to drop front of oil pan enough to remove TC

R&R the hub is not hard. A standard star puller gets them off and you can make a install tool simple with all thread rod, large fender washers, thrust bearing and 1 nut the size of all thread (same size as crank bolt thread)

SS RRR Jun 6, 2018 07:35 AM


Originally Posted by Joe Soucy (Post 19909216)


is there any possible way I can run the 95 timing cover ? Because I just got done assembling my 383 lol and didn't know . Anyway I could delete some stuff to make it easier ?

yes. cps can be tuned out.

Joe Soucy Jun 6, 2018 10:10 AM


Originally Posted by SS RRR (Post 19909484)

yes. cps can be tuned out.

if that is tuned out then i can run both my 95 TC and 95 crank hub then ?

SS RRR Jun 6, 2018 10:58 AM

Yep just as long as you do not have a crank reluctor wheel in place.

Joe Soucy Jun 6, 2018 11:08 AM


Originally Posted by SS RRR (Post 19909607)
Yep just as long as you do not have a crank reluctor wheel in place.

and 95 f body lt1s didn't come with a crank reluctor wheel correct ? So I should be good .
also would it run fine if its tuned out?

BALLSS Jun 6, 2018 12:15 PM


Originally Posted by Joe Soucy (Post 19909616)


and 95 f body lt1s didn't come with a crank reluctor wheel correct ? So I should be good .
also would it run fine if its tuned out?

yes and yes...assuming your tuner tunes out the CPS.


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