hi ok first i cant get the original engine in my 80 ls to run so im going to replace it with one out of an 85. the problem is the 80 is a stick and the engine in the 85 is an automatic, i need to know what i need to switch over from the 80 engine to the 85 other than the flywheel to keep the balance ok? since im going to run the fmoc instead of the behive can i just saw off the t part on the 85 one where the heater hose goes, with it not being bevelled on the end will the cause it to leak water? and last how the crap do you toruqe the flywheel nut back to 350 ft/lb my toruqe wrench doesnt go up that high nor do i have an impact? thank you in advance for your help.

 

flywheel needs to match the engine, so 84 or 85. don't know if the 81-83 is the same weight or not. cut the part of the T fitting off that u don't need and file off the burrs, i did the same thing once.

 

ok thanks, I figured it would be ok to cut that t off but figured id make sure first. since the motor already has an automatic balance weight on it im thinking about just getting a lightwight flywheel so i wont have to mess with the flwheel nut plus now knowing the 80 flywheel wont work, is the one in your car steel or aluminum? im assuming since the 85 has the correct auto balance weight from the factory on it, can i use the early style 215mm clutch light flywheel or do i still have to use the 83-92 225mm light one, assuming the weight is what keeps the engine in balance and not the flywheel at this point, it just determens what size clutch i use, correct?

 

mine is steel but i agree a light flywheel would be the best way since it would just bolt to the counter weight. RB has a light weight steel flywheel that would work just fine. i'm not much on the different diameters and what will and wont work. i thought the 86 and later was the larger diameter. i'd use which ever would work right with the tranny being used so the starter meshes correctly.

 

You can use either flywheel. The actual size of the flywheel didn't change only the friction surface

 

since im going to use the 80 trans will the 80 starter work with the light flywheel for the for the 85? ive read the sa starters are different but im not sure whats different about them.

 

the 80 starter should work. have u pulled the engine out yet?

 

all that matters is the clutch and flywheel are matching. Im actually running an 86 13B in my car using the 215mm clutch/flywheel set up from my 82. The Non-turbo clutches were pretty much split up in 2 groups. 1982 and earlier are 215mm, 1983 and later are 225mm. Your best bet is to find any aftermarket NA flywheel that is convenient/affordable and buy the clutch/pressure plate kit to match it. It may be splitting hairs, but perhaps the ever so slightly smaller clutch disc/pressure plate may have a smidgen less rotational weight, and in the world of aftermarket or performance clutches the slightly larger late model clutch will have no real grabbing/clamping force over the 215mm ones. Just something to think about

 

no, i havent pulled the motor yet, i was trying to figure out what i needed to do to make every thing work. just for future reference so i buy a new rb light wheel, provided i have right auto balance wight, i would beable to use that flywheel on any 12a or 13b from 74 to 92?

 

yes, as a matter of fact I believe ALL rear auto-counterweights have the same 6 hole bolt pattern up to and including the RENESIS. The flywheel will fit all the engines, the main factor of making it work is that you use the FB/FC NA transmission & starter

 

why wouldnt you be able to use the sa trans and starter with an fc engine and light wheel?

 

when I say FB, I also imply the SA as well. so for clarification SA/FB/FC trans/starter

 

Im doing the same thing, i have a 79. I was just wondering, how will the wiring harness work out? does everything fit? cuz the one on the 1985 looks sooooo different..

 

i was ordering the the rb 83-up flywheel and was getting a new starter too when i noticed the 80 starter has 8 teeth while the 85 starter has 11 teeth. im going to get the one for the 80 since im using the 80 trans, but will it work ok? im just wanting to be double sure cause the last thing i want to do is chip the teeth of a 300 dollar flywheel.