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2.2L L61 Performance Tech 16 valve 145 hp EcoTec with 155 lb-ft of torque

Underdrive Pulley

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Old 10-02-2008, 06:24 PM
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lol couldnt hurt then
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Old 10-02-2008, 09:12 PM
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Originally Posted by jbenso4
lol couldnt hurt then
exactly. lighter pullies and maybe a 2.4 tb is what im looking to get soon. then a turbo kit next winter but the massive spray will be good for now
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Old 11-03-2008, 08:18 PM
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We just opened a group buy for those pulley so if you are looking to get one, this is the right time... https://www.cobaltss.net/forums/3047477-post.html
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Old 12-10-2008, 02:32 PM
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opening this thread back up, those who have the UDP we need feedback as this is still a new product that not to many people have.
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Old 12-10-2008, 02:38 PM
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soon as mrz gets mine to me i'll let you know until them we are all just sol.
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Old 12-11-2008, 06:20 PM
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had it since it came out....no problems...voltage is same, car doesnt shake
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Old 12-11-2008, 06:22 PM
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Originally Posted by o3nisoaso3
exactly. lighter pullies and maybe a 2.4 tb is what im looking to get soon. then a turbo kit next winter but the massive spray will be good for now
How much spray we talking about there?
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Old 12-11-2008, 06:29 PM
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Originally Posted by originaladrian
opening this thread back up, those who have the UDP we need feedback as this is still a new product that not to many people have.
No problem with my MRZ UDP since install -- one of the early installers -- car runs strong!
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Old 12-12-2008, 09:32 AM
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Originally Posted by Red07SSNA
No problem with my MRZ UDP since install -- one of the early installers -- car runs strong!
good stuff, think ill order one today.

you bought the new belt as well?
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Old 12-12-2008, 04:05 PM
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i didnt buy the new belt...just got one from anapa...why pay 40 when you can get one for 13
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Old 12-13-2008, 01:20 AM
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So how many miles has everyone with an underdrive pulley put on their cars since installing it? Any issues with it? Any oil leaks? Just asking cause i think i might invest in one soon
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Old 12-13-2008, 11:27 AM
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Originally Posted by BlackLS
So how many miles has everyone with an underdrive pulley put on their cars since installing it? Any issues with it? Any oil leaks? Just asking cause i think i might invest in one soon
Roughly 500 miles, no leaks, no issues.
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Old 12-14-2008, 12:34 AM
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same here
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Old 12-14-2008, 12:39 AM
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Man you guys have had these over 2 months abd only put 500 miles on lol do yous drive your cars ever lol
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Old 12-14-2008, 05:35 AM
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lol i put 500 miles on in maybe a week or less haha.
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Old 12-14-2008, 06:08 AM
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Originally Posted by BlackLS
Man you guys have had these over 2 months abd only put 500 miles on lol do yous drive your cars ever lol
i got my car in july of '06, and it doesnt even have 25,000 miles yet...course thats still like 1000 miles a month
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Old 12-15-2008, 03:03 AM
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haha 10 grand easily...i even have two 12" infinity's with a 1600w infinity amp and all is well
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Old 12-15-2008, 08:47 AM
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ha i got my 08 in early august i just hit 4300 miles lol yay for short NY commutes
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Old 12-15-2008, 12:38 PM
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well since were ono milage talk ive had my car for a year and 3 months and ive got 6700 miles total but i think now its the time to start modding. i believe a udp is coming soon
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Old 01-03-2009, 01:08 AM
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Well i guess i must just drive alot cause mine is an 06 and i have just about 59000 lol One question for anyone that has installed one of these: where did you get the new bolt for the pulley cause i believe i read you need to replace it and what do you need to torque it to?
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Old 01-03-2009, 06:01 AM
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74 ft-lb torque, i did not replace my bolt and its running just fine.
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Old 01-03-2009, 11:26 AM
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Originally Posted by BlackLS
Well i guess i must just drive alot cause mine is an 06 and i have just about 59000 lol One question for anyone that has installed one of these: where did you get the new bolt for the pulley cause i believe i read you need to replace it and what do you need to torque it to?
New bolt: any GM dealer or crateenginedepot.com...PN is 11589123 (bolt and washer assy)
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Old 01-03-2009, 01:45 PM
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i didnt replace my bolt either
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Old 01-12-2009, 02:06 AM
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did i see someone say that the pulley didnt affect their large stereo? I was looking into getting the udp but i think id have to lose my subs and amp
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Old 01-12-2009, 02:32 AM
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um not sure, but they just released a lightweight alternator pulley to help with some of the strain on the accessories this may solve your problem or you could always get a cell capacitor and that would help too.
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