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

new ** MRZ Performance UDP and Lightweight Crank Pulleys for the 2.2/2.4 NA Ecotec's

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Old 09-06-2008, 07:07 PM
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Jn2
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Originally Posted by tru2nrtt777
The underdrive will add a marginal difference in HP but technically it is considered "releasing hp" not "adding".
.......once more, i am really eager to throw these baby on the rollers...i have set friday up with my dyno shop, that gives MRZ the ability get them to me by thursday, meaning 2-3day shipping
Old 09-06-2008, 07:52 PM
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Originally Posted by Jn2
.......once more, i am really eager to throw these baby on the rollers...i have set friday up with my dyno shop, that gives MRZ the ability get them to me by thursday, meaning 2-3day shipping
good luck! thx for steppin up & testing those for us all!
Old 09-06-2008, 08:02 PM
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i have always been testing thing out for you guys, i tested the OBX header(version1) back when everyone was asking alot of Q's on it, and in a bit more im going to test the OBX header(version 2 that is a shorty with a dp) to see how it fts, works, etc...and this pulley would be something else i would test, i dont mind doin my part for the community
Old 09-07-2008, 02:12 PM
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Originally Posted by Jn2
Figured I would bust your ***** a little bit.
Old 09-09-2008, 10:07 AM
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Originally Posted by Jn2
i have always been testing thing out for you guys, i tested the OBX header(version1) back when everyone was asking alot of Q's on it, and in a bit more im going to test the OBX header(version 2 that is a shorty with a dp) to see how it fts, works, etc...and this pulley would be something else i would test, i dont mind doin my part for the community
That's right and my OBX 4-1 header is still on and I have no problems or leaks. I ordered the Leightweight MRZ Pulley (RED) since I have too many aftermarket 12V. accesories to go underdrive.
Anyone else order it?
Less than $200 shipped it's worth it even if I only get 2-3 WHP and quicker revs
Old 09-09-2008, 07:42 PM
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Originally Posted by pacific cobalt
it's worth it even if I only get 2-3 WHP and quicker revs
Any power is good power lol
Old 09-09-2008, 07:53 PM
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Originally Posted by ProjectBolt08
Any power is good power lol
I am looking foward to Jn2's dyno results.
Just picked up a new Crank Pulley Bolt today from the GM Dealer.
Old 09-10-2008, 12:38 AM
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so did u order the MRZ or one from GM, or did GM or it for u, i dont get it? and as far as the pulley goes i havent heard from MRZ...they said they would ship it monday when they sent me a PM, still no word from them i have to idea if they are serious or not...what sucks is, if they dont send it i will be stuck dyno'n my car anyway cuz i already paid for the dyno time...i had to in order to be able to get off and change pullies...paid them 150 for 2hrs
Old 09-10-2008, 12:46 AM
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Originally Posted by Jn2
so did u order the MRZ or one from GM, or did GM or it for u, i dont get it? and as far as the pulley goes i havent heard from MRZ...they said they would ship it monday when they sent me a PM, still no word from them i have to idea if they are serious or not...what sucks is, if they dont send it i will be stuck dyno'n my car anyway cuz i already paid for the dyno time...i had to in order to be able to get off and change pullies...paid them 150 for 2hrs
I hope they sent them cuz dyno is gonna make it or break it for me for the pulley size and what not...

BTW what mods u got?
Old 09-10-2008, 12:52 AM
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my mods r al follows

KnN intake(2.4 SS version)
Vibrant perfromance 4-2-1 header and dp
Greddy EvoII catback exhaust(2.5" stainless steel)
TTR solid tranny mounts
Cosmo short throw shifter

those r them...if i dont get pullies by saturday the latest, i was told i could have my 2hrs friday or saturday, 5-7pm
Old 09-10-2008, 12:55 AM
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Originally Posted by Jn2
my mods r al follows

KnN intake(2.4 SS version)
Vibrant perfromance 4-2-1 header and dp
Greddy EvoII catback exhaust(2.5" stainless steel)
TTR solid tranny mounts
Cosmo short throw shifter

those r them...if i dont get pullies by saturday the latest, i was told i could have my 2hrs friday or saturday, 5-7pm
Ok cool you'll be testing with those mods good to know...

Hope u get them by then!
Old 09-10-2008, 01:00 AM
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Originally Posted by Jn2
so did u order the MRZ or one from GM, or did GM or it for u, i dont get it? and as far as the pulley goes i havent heard from MRZ...they said they would ship it monday when they sent me a PM, still no word from them i have to idea if they are serious or not...what sucks is, if they dont send it i will be stuck dyno'n my car anyway cuz i already paid for the dyno time...i had to in order to be able to get off and change pullies...paid them 150 for 2hrs
I don't think MRZ is going to leave you hanging after you volunteered to dyno and test fit a new product for them.
BTW I ordered the lightweight version of the 2.2/2.4 Pulley from MRZ. My tracking number shows it left Quebec today. I only bought the 1 Bolt for the crank pulley at the GM dealer since you can only torque it once.

GM Part# 11589123

Old 09-10-2008, 01:07 AM
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Originally Posted by pacific cobalt
I don't think MRZ is going to leave you hanging after you volunteered to dyno and test fit a new product for them.
BTW I ordered the lightweight version of the 2.2/2.4 Pulley from MRZ. My tracking number shows it left Quebec today. I only bought the 1 Bolt for the crank pulley at the GM dealer since you can only torque it once.

GM Part# 11589123

yup TRQ to yield, trq it to 74lbs, than 75*more i think, well mine is being installed at a dealership by my buddy who work there, so the install will be perfect...and i hope they dont leave me hanging, or else i will be stick with 2 hrs of dyno time, idk what the **** ima do with 2 hrs of it, i woudl of waited but for dyno time they made me make a appt since i would need it, than need to get off, than get on, than get off, ya know
Old 09-12-2008, 10:59 PM
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any news yet bro?
Old 09-13-2008, 02:30 AM
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pullies arent here yet, i assume they wont arrive till later next week, as they had to come from canada, also with hurricane ike messing up our weather down here, my dyno money was refunded they said i could just do a walk-in for the dyno, since they have a open book for next week...

from USPS
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Your item left MONTREAL, CANADA on September 11, 2008. Information, if available, is updated every evening. Please check again later.

Last edited by Jn2; 09-13-2008 at 02:30 AM. Reason: Automerged Doublepost
Old 09-13-2008, 11:29 AM
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im looking froward to the stock lighter pulley test and if a group buy price is right, i got 2 people who want in

Last edited by XgunsmokeX; 09-13-2008 at 12:09 PM.
Old 09-13-2008, 03:19 PM
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Once i see results this is on my list. For Sure
Old 09-13-2008, 03:26 PM
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what type of price are we talking if you sold a complete pulley replacement kit.. for the 2.2l
Old 09-13-2008, 03:36 PM
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well this one is 200 so the other one will probably be around same price
so 400 bucks im thinking

So were going to need another bolt for when we install these new pulleys?
Old 09-13-2008, 03:45 PM
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Originally Posted by MP Cobalt
So were going to need another bolt for when we install these new pulleys?
Yes... its like 6 or 7 bucks for a new center bolt...
Old 09-13-2008, 03:48 PM
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Ok. I didn't care how much it cost lol just don't want to be stuck without a bolt. I'm going to buy this pulley once Jn2 gets it dynod and sees a result.
Old 09-13-2008, 04:56 PM
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Originally Posted by MP Cobalt
Ok. I didn't care how much it cost lol just don't want to be stuck without a bolt. I'm going to buy this pulley once Jn2 gets it dynod and sees a result.
just dont base your results on the dyno run, i still have doubts that it will add any serious hp, i can see the undedrive adding something, but the OEM one prob wont, the gain is in the faster rev'n not in the hp gained, remember that...
Old 09-13-2008, 07:55 PM
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Originally Posted by Jn2
just dont base your results on the dyno run, i still have doubts that it will add any serious hp, i can see the undedrive adding something, but the OEM one prob wont, the gain is in the faster rev'n not in the hp gained, remember that...
plus your gains if any will be significantly different than someone who JUST has the pulley.
Old 09-13-2008, 08:23 PM
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Originally Posted by Borderlin3
plus your gains if any will be significantly different than someone who JUST has the pulley.
i agree every car has different mods done to it so gain(s) are dependent on the mods on the car... also tuning will play a factor...
Old 09-13-2008, 08:45 PM
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alright noob question... were does the underdrive pully go? cuz im assumin i should buy both the udp underdrive pully and the light weight pully.


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