(ENGINE) counter weight question
#7
Suicidal Death Missile
Join Date: Mar 2004
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Originally Posted by Midwest 7's
counterweight should match rotors.
get a lightweight flywheel and find a 79-82 weight.
make sure it is a 225mm flywheel and you will be able to keep your clutch.
get a lightweight flywheel and find a 79-82 weight.
make sure it is a 225mm flywheel and you will be able to keep your clutch.
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#8
Can't Hear Now
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Technically, the 82 flywheel won't balance perfectly on your 85 engine but you can get away with it. You will get a very minor vibration around 1700 rpm and then it goes away pretty quickly as the engine revs and you won't get it again until about 7200-7300rpm and then again it goes away pretty quickly as the revs climb. I ran one this way for several years. Lots of IT racers ran the same setup years ago.
#10
sellout
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Originally Posted by RX3SP
Technically, the 82 flywheel won't balance perfectly on your 85 engine but you can get away with it. You will get a very minor vibration around 1700 rpm and then it goes away pretty quickly as the engine revs and you won't get it again until about 7200-7300rpm and then again it goes away pretty quickly as the revs climb. I ran one this way for several years. Lots of IT racers ran the same setup years ago.
#11
lol yeah i know and i know better than to run it.....but its in the car as of right now..ive not started it yet like that errr i dont feel like droping the trans so soon
if it can be run like this with out blowing up than i will run it like this for a few weeks till i get the money to get a diff clutch
if it can be run like this with out blowing up than i will run it like this for a few weeks till i get the money to get a diff clutch
#15
Hunting Skylines
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Originally Posted by RX3SP
You'll be fine with it, especially for just a few weeks. Who knows, you might just decide you like it and run it for a few years like me! Actually, I did that combo on two engines. One was a J-spec 6 port 12a and the other was an 85 us spec 4 port 12a.
#16
Old Fart Young at Heart
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The vibration will cause accelerated wear on the bearings, all 4 of them. At high rpms, as the bearings wear, there will be more movement and flex in the e-shaft. Damage will increase and include chatter marks on the housings and eventually munched apex grooves on the rotors and worse than average wear of the irons.
I understand the desire to use good, on hand parts and save money by not having to replace them. What it comes down to is spend a little now, or a lot more later, your choice.
I understand the desire to use good, on hand parts and save money by not having to replace them. What it comes down to is spend a little now, or a lot more later, your choice.
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