Flywheel / Clutch ID Question
09-19-12, 01:44 AM
#1
Sin City Rotary
Thread Starter
Flywheel / Clutch ID Question
Ok of course while trying to prep the SA for another trip to Socal for SS15 ... and having a bunch of work accomplished over the past year something comes up ....
The clutch has begun to slip .... crap
Ok the clutch itself not a problem .(other then timing) ... the flywheel on the other hand can be .... I would not consider doing the clutch job and not machining the flywheel ... but how many different flywheels are there??
The problem is circumstances has made the SA pulling DD duties right now ... so I would need a flywheel machined and waiting to swap with the one on the car now
I have what I believe is a S3 flywheel ... which the clutch won't mate with as the step is bigger ... and I have one off of a SA engine ... mates but after looking in the inspection opening at the top of the keg the one in the car is mmuucchh thinner ...
What the heck is the differance with these 3 flywheels other then the obvious weight differance .... if I swapped flywheels what would be the benefits or downfalls??
Time is of the essence so please first gen 12A guys let er rip
The clutch has begun to slip .... crap
Ok the clutch itself not a problem .(other then timing) ... the flywheel on the other hand can be .... I would not consider doing the clutch job and not machining the flywheel ... but how many different flywheels are there??
The problem is circumstances has made the SA pulling DD duties right now ... so I would need a flywheel machined and waiting to swap with the one on the car now
I have what I believe is a S3 flywheel ... which the clutch won't mate with as the step is bigger ... and I have one off of a SA engine ... mates but after looking in the inspection opening at the top of the keg the one in the car is mmuucchh thinner ...
What the heck is the differance with these 3 flywheels other then the obvious weight differance .... if I swapped flywheels what would be the benefits or downfalls??
Time is of the essence so please first gen 12A guys let er rip
09-19-12, 06:13 AM
#2
the flywheel must be matched to the engine according to what originally came with the engine. different flywheel weights were used, with S3 being the heaviest.
if i were you, i would just take the 5 mins and pull the flywheel and take it to a machine shop and have it surfaced. most can do it the same day. you can always use a red scotchbrite pad and clean the flywheel up with that. the LT1's flywheel in my Corvette is surfaced using a red scotchbrite pad. this is an acceptable practice as the dual mass flywheel takes a special machine to surface. i used it when i did my clutch and it worked disgustingly well.
if i were you, i would just take the 5 mins and pull the flywheel and take it to a machine shop and have it surfaced. most can do it the same day. you can always use a red scotchbrite pad and clean the flywheel up with that. the LT1's flywheel in my Corvette is surfaced using a red scotchbrite pad. this is an acceptable practice as the dual mass flywheel takes a special machine to surface. i used it when i did my clutch and it worked disgustingly well.
09-19-12, 07:46 AM
#3
Waffles - hmmm good
iTrader: (1)
I use an 82 flywheel on my stock 80 SA no problem. Its the lightest 12A flywheel, an old racer
trick (cheat?). Anyway, what 12A is in the car? The 80 flywheel is the heaviest.
I think I'd go the scotch pad route mention by Dave and then deal with it after SS.
trick (cheat?). Anyway, what 12A is in the car? The 80 flywheel is the heaviest.
I think I'd go the scotch pad route mention by Dave and then deal with it after SS.
09-19-12, 10:56 AM
#4
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if its just starting to slip the flywheel might be totally fine....
there are two sets of rotors, 74-82 and 83-85, so there are two sets of flywheels, 79-80 and 81-82, and then 83-85.
the 79-80 and 81-82 are the same balance weight, but the 79-80 flywheel is like 30# and the 81-82 is 23.
so you need to figure out which rotors you have in the engine, IE what year engine, and then the flywheel is easy
there are two sets of rotors, 74-82 and 83-85, so there are two sets of flywheels, 79-80 and 81-82, and then 83-85.
the 79-80 and 81-82 are the same balance weight, but the 79-80 flywheel is like 30# and the 81-82 is 23.
so you need to figure out which rotors you have in the engine, IE what year engine, and then the flywheel is easy
09-19-12, 03:50 PM
#5
Sin City Rotary
Thread Starter
the flywheel must be matched to the engine according to what originally came with the engine. different flywheel weights were used, with S3 being the heaviest.
if i were you, i would just take the 5 mins and pull the flywheel and take it to a machine shop and have it surfaced. most can do it the same day. you can always use a red scotchbrite pad and clean the flywheel up with that. the LT1's flywheel in my Corvette is surfaced using a red scotchbrite pad. this is an acceptable practice as the dual mass flywheel takes a special machine to surface. i used it when i did my clutch and it worked disgustingly well.
if i were you, i would just take the 5 mins and pull the flywheel and take it to a machine shop and have it surfaced. most can do it the same day. you can always use a red scotchbrite pad and clean the flywheel up with that. the LT1's flywheel in my Corvette is surfaced using a red scotchbrite pad. this is an acceptable practice as the dual mass flywheel takes a special machine to surface. i used it when i did my clutch and it worked disgustingly well.
considering the scotch bright
if its just starting to slip the flywheel might be totally fine....
there are two sets of rotors, 74-82 and 83-85, so there are two sets of flywheels, 79-80 and 81-82, and then 83-85.
the 79-80 and 81-82 are the same balance weight, but the 79-80 flywheel is like 30# and the 81-82 is 23.
so you need to figure out which rotors you have in the engine, IE what year engine, and then the flywheel is easy
there are two sets of rotors, 74-82 and 83-85, so there are two sets of flywheels, 79-80 and 81-82, and then 83-85.
the 79-80 and 81-82 are the same balance weight, but the 79-80 flywheel is like 30# and the 81-82 is 23.
so you need to figure out which rotors you have in the engine, IE what year engine, and then the flywheel is easy
ohhh good info there so the SA flywheel would work if I read correctly ... I am now pretty curtain must be the 81- 82 ... at the thinest point it's maybe 1/4 to 1/2 inch of meat from ring gear to edge (doing this via sticking finger in inspection hole) clearly thinner then the other two flywheels I dug up
Some good grades between here and there, I don't baby it typically and would suck to get stuck in route (will have the truck and trailer as well but is suppose to act as support vehicle from Santa Clarita to track Saturday monring) and really wanted to drive my dang car
Surley not an SA/thermal reactor setup, has 81 and up housings
appreciate you guys chiming in!!
Last edited by 13x; 09-19-12 at 04:15 PM.
09-20-12, 06:26 AM
#6
i mean a scotch brite pad by hand. hand sand the flywheel with it. it will come clean, trust me. i used this method on my 94 Corvette. it will work just fine. i was skeptical at first but the method works. you can even put s light cross hatching in the flywheel with the scotch brite pad as well. i keep a surfaced S3 flywheel on the shelf at all times. i keep the sucker soaking in WD40, lol. a quick brake clean bath ind its ready to install, lol.
09-20-12, 10:20 AM
#7
Sin City Rotary
Thread Starter
hmmmm well the chevy would have a touch more torque
I myself have a resurface S3 as well but can't swap lol
ok looks like I'll be pulling the tranny out tommorow night
I myself have a resurface S3 as well but can't swap lol
ok looks like I'll be pulling the tranny out tommorow night
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