my cousin has a 88 IROC and was wondering how hard the swap would be? is there anything that needs to be fabricated? any info would be appreciated
..he wants that 346 CI Carbed LS2 crate motor and a 5 speed

 

nevermind found this: http://www.thirdgen.org/techboard/lt...on-answer.html

and he will read

 

I can see carbed...but why a 5spd??? Why not just put the T-56 in? If he goes 5 speed, I assume he is gonna use a T-5, and you have to build those to handle some torque. But a T-56 is up to the task as is usually.

Anyway...to answer your question, even though you found the threads on TGO... its not hard. If he is doing a carb, and not keeping A/C...its a total piece of cake.

Just buy the conversion mounts, and crossmember if you use a t-56...and thats it. Stock driveshaft will fit, everything will clear...

Have fun!!

Justin

 

http://www.hawksthirdgenparts.com/in...S&Category=691

 

A Standard T-5 per the Spec's, can not handle the HP/TQ of a LSx motor. Unless it is a TKO version or as Ghetto state, a built up one. And even then.. it might not handle it for long.

 

the main problem with the T5 is the case itself.
you can put the most bulletproof internals out there in it... but you put the power thru it, and the stress causes the case to flex.
the flexing case causes things to mesh wrong, maybe even touch, and then things break.

only real fix is to change the case to something stronger, and change the internals to something stronger.

and when you change the case, and change the internals.. thats called, getting a different transmission.

 

How do you expect that T5 to bolt up to an LS1 anyway? Is there a different bellhousing thats available?

 

LS1s have the same boltpattern as SBCs.... bolting up bellhousings isnt the hardest issue.
the flywheel is usually the biggest one, but there are solutions to all of it.

 

the input shaft on the t5 might not be long enough to reach the pilot bearing on the LS1, thats the tproblem with early 93/94 lt1 t-56's

 

they make a bushing that sticks out from the crank some...

im not going to claim to be an expert on doing it... im running the LS1 T56... but i know people have done it, and i know the parts exist out there to do it.. i come aross them while reading all the time as im looking up other things

 

do you have a part # for this bushing?

 

no, but i did just do a quickie search.
there seems to be some good info in this thread:Crank Spacers and Extended Pilot Bearings

excerpt:


like i said, im no expert.. if you want electricial/wiring done for a 99+ fbody drivetrain swap, or most 3rdgen fbody swap questions, no problem.. ive done that a few times... but the whole SBC trans on a LS1 is something ive only read about alot...

 

thanks for the info. hes stuck on a 5 speed dont know why. i told him go T56
the motor hes interested in is that 364ci LS2 carbed crate motor from summit/GMPP. im trying to convince him as well that he needs to throw in a more ballsy cam cause that stock ones a little fella'. also i was researching around and i saw LS1 wiring harnesses from like 500$-$1000. does anyone have the exact PN you need?

 

They have harnesses on the link that I posted. Give them a ring, and they'll get you fixed up.

 

thanks again! ^ yeah hes stuck on the 5 speed. hes looking at a TK0 600 & some richmond 5 spd

 

what a waste of money for 5 speeds.. tell the guy he is a moron and to do some research.... Carbed LSx motor = BOOOO

 

first off dont call my cousin a moron.. go **** your self. 2nd can YOU tell me why not to run a carbed LSX motor?

back on topic:
and he wants 3.42s-3.55s in the rear end. he wants this car to be like a fully built road course car

 

Your cuz isnt a moron... Just make sure he researches that 5spd before making a commitment to it. The 6spds are nice. Nice low 1st gear, good ratios in between, and that gorgeous 6th gear if he ever wants to go for a highway cruise.

The carb isnt a bad choice... But ide be curious as to why he is going carbed as well. Im not a carb guru by any stretch. But I do know they can be built to run just as strong as the fuel injected guys do. It just takes the right set up, and some tuning ability.

Now...and forgive me, this is where I could be blowing smoke out of my ***...but if he wants to set it up for a road course, wouldnt fuel injection be a better set up for him? I mean...I know carbed cars can run a road course without an issue...I just always thought that the fuel injected cars did alittle better just do to the driveability and tuning capabilities.

Either way...it'll be a fun car!!! If the wiring is the only reason he dosent want to stay fuel injected...its really not that bad. Carbed or not, it'll be bad *** when done...if he builds it right.

Justin

 

the reason he wants a 5 speed with some tight gearing is cause he wants it to be like a road course car. my cousin is unique and likes to be different, i personally think the carbed motor looks pretty good. im not too sure why he wants to run carbed, and i think hes not liking all the wiring hes prob. guna have to do with the swap.. i should just stop posting and let him do his own ****..but thanks for your input

 

Tell him to jump on board. Does he watch Muscle Car on Spike? He did a ls-1 swap in an old school sleeper. He's retaining the coil pack setup and using a Demon carb. The wiring appeared to be rather simple and straight forward. Tell him to check out this site to give him some more ideas.

http://www.fuelairspark.com/