ATI Super Damper or UR Crank Pulley

[karmakaze]

Price has nothing to do with it, so leave that out of it.

Current engine specs:Tomie Solid LifterCryo Treated CrankARP Main, Rod, and Head studsBC valve springs and retainersBC stage 3 cams90mm CP PistonsDarton SleevesEagle RodsCometic 90mm MLS Head Gasket

my redline will be 9,000. Although the engine can handle more than that. I am doing it more for reliability as I don't plan to keep it up there a whole lot. But there is no doubt that I occasionally will.

I am wondering if I should go with the ATI Super Damper or the UR Crank Pulley. The issue is, The ATI Super Damper is only about 1/2lb lighter than the stock pulley. Should I go with the ATI Super Damper for reliability, or the UR pulley for better response?

[Seishuku]

Personally, I would go with ATI. That extra vibration at 9000RPM could shred a belt or destroy a bearing, so I would go with something to absorb that.

[doridori23]

Personally, I would go with ATI. That extra vibration at 9000RPM could shred a belt or destroy a bearing, so I would go with something to absorb that.

Agreed whole heartedly. Most professional shops are iffy on the use of a UR Pulley on a street car and some will not even install it on a street car. If you have a/c when the clutch engages the little jolt on the main pulley is absorbed by a thin piece of rubber between the main pulley and the outer ring (biggest 2 belt locations). You can see the rubber if you look at the back of the pulley. The power steering and alternator also causes jolts but it is minor compared to the a/c compressor. The UR pulley will not absorb any of this shock and can destroy bearings very quickly! If you have the $450 for the ATI OR if you have an investment of more than $2000 on the motor you would be wise to spend the cash on the ATI Super Dampener.

[karmakaze]

Agreed whole heartedly. Most professional shops are iffy on the use of a UR Pulley on a street car and some will not even install it on a street car. If you have a/c when the clutch engages the little jolt on the main pulley is absorbed by a thin piece of rubber between the main pulley and the outer ring (biggest 2 belt locations). You can see the rubber if you look at the back of the pulley. The power steering and alternator also causes jolts but it is minor compared to the a/c compressor. The UR pulley will not absorb any of this shock and can destroy bearings very quickly! If you have the $450 for the ATI OR if you have an investment of more than $2000 on the motor you would be wise to spend the cash on the ATI Super Dampener.

thanks for the advice! although, I probably should of added that everything that has to do with the AC has been stripped from the car. but even asides from not having to worry about strain from the AC, does the extra reliability from the damper win over the performance gain from the UR pulley? what if my rods and crank are ballanced?

[Seishuku]

For the safety, I would say there's no question. ATI all the way.Especially if you have a lot of money put into the motor.

[karmakaze]

For the safety, I would say there's no question. ATI all the way.Especially if you have a lot of money put into the motor.

thats my choice then. Hopefully I will get my engine back from the machine shop after next week!

[nwmrkt]

What pulleys does the greddy kit include for the the SR? This one also? (not the same kind damper of course, like what pulley?)

[doridori23]

GReddy/ERM/Megan/etc includes alt, water pump, and PS pump pullies.

[spider_slayer]

since its only 1/2 lbs your saving why not jsut use the stock pulley?

get a lightened driveshaft or something.

[karmakaze]

since its only 1/2 lbs your saving why not jsut use the stock pulley?

get a lightened driveshaft or something.

i already have an aluminum driveshaft and a HKS GP Pro twinplate clutch/flywheel.

the stock pulley that i have is not in very good shape and i want to upgrade it anyway.

[nwmrkt]

GReddy/ERM/Megan/etc includes alt, water pump, and PS pump pullies.

Thanks! and which pulley is this one for? (ati super)

[doridori23]

ATI is a replacement Main/crankshaft pulley

[corey240]

hey karma what color is your clutch? like the pressure plate, i got this one from mamotorsports for really cheap in very good condition, its an hks, its chrome, kinda heavy but its way beter then my act was, just wondering if you had the same thing or knew anything about hks clutches. btw, he has alot of money into this motor

[nwmrkt]

ATI is a replacement Main/crankshaft pulley

thanks so the greddy kit has nothing to do with said pulley right?

[karmakaze]

thanks so the greddy kit has nothing to do with said pulley right?

correct.

the greddy kit does not come with a crank pulley or damper.

[karmakaze]

mine is a copperish orange color.i can take a picture if you like.

[DrifterProdigy85]

Mazworx told me to run ATI on mine. Ill be revving to 8500-9000rpm on solid lifters too. They said the UR pulley isnt gonna dampen any vibration caused by the high rpm which will eventuallly take its tole on the internals.