undampened crank pulleys

jdub

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It's the harmonics of the crank that causes the problem...it's hard on the bearings.
 

jdub

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Glad it amuses you :sarcasm:

Not sure if a 4ag uses a dampened pulley or not myself...if it does, you don't want to use anything else that's not dampened.
 

suprra_girl

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Yea the 4a uses dampened also... so i would expect same end result.

I was wondering about aftermarket pulley's for the 7m as well, is there a hp i should be changing from the stock one? Is there any telltale signs of failure that i can look for? And who does aftermarket ones that you recommend?

Thanks :D
 

Jeff Lange

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I didn't think the 4A-GE's was dampened. I haven't looked at one in a long time though, there's too much stuff in the way in my black car, lol. I'll take a look tonight I've got one out of the car right now and another on a 4A-GZE in my garage.

Jeff
 

selfinfliction

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what kind of weight difference is there between the stocker and the ati?

i just shot IJ an message this morning about that exact topic, asking if it would still be beneficial to run a dampened pulley on a zero balanced rotating assembly
 

jdub

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suprra_girl;923166 said:
$399usd from Summit
I'm gonna go search Ian's thread to find a pic of his ati :)

Ians pulley *drool* hehe http://members.optushome.com.au/ianj/ati01.jpg


SIP Racing (suprarich) has ATI Dampers for the 7M...might be worth a PM for the 4AG.
They are actually a bit cheaper than a new stock damper from Toyota ;)


selfinfliction;923247 said:
what kind of weight difference is there between the stocker and the ati?

i just shot IJ an message this morning about that exact topic, asking if it would still be beneficial to run a dampened pulley on a zero balanced rotating assembly

A little over 5 lbs lighter and the AC pulley can be removed.

Yes...you want to run a damper even on a zero balance assembly. Even better is to balance with the damper and fly wheel/flex plate bolted on.
 

selfinfliction

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jdub;923249 said:
A little over 5 lbs lighter and the AC pulley can be removed.

Yes...you want to run a damper even on a zero balance assembly. Even better is to balance with the damper and fly wheel/flex plate bolted on.

yeah i was reading today on some bmw forums about using a lightened flywheel in combination with lightened non dampened crank pulley, seems there's alot of horror stories about it causing spun bearings.

i was just gonna cheap out, but those beemer guys seem to swear by using only dampened pullies on an inline 6 motor