new ** MRZ Performance UDP and Lightweight Crank Pulleys for the 2.2/2.4 NA Ecotec's
09-25-2008, 09:38 AM
#152
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Ya know what. Gimme dates n ****. I got some paid vacation time that I may want to take advantage of.
I actually have yet to make it back to the track since the 2.4 intake mani and header. Prior to buying header I had only gutted out my cat, otherwise totally stock between magnaflow catback and engine.
I'm actually thinking I should be able to pick up a .10th just from adding the ss/sc springs. I'm getting much better front bite.
I actually have yet to make it back to the track since the 2.4 intake mani and header. Prior to buying header I had only gutted out my cat, otherwise totally stock between magnaflow catback and engine.
I'm actually thinking I should be able to pick up a .10th just from adding the ss/sc springs. I'm getting much better front bite.
10-03-2008, 02:58 AM
#155
i didnt run to great idk whats going on, my best run was 16.1...i need to work on my launching...i launched at 3k and the car boogged down did it for 2k, 2500, and 3k i only got to run 3 times, 
i guess i have launch at a higher RPM cuz the car booged like hell, 60ft was 2.44, ima work on launching than head back, cuz that was rediculous...car has never bogged like that before, it would always pick up after i launched, not drop down to 2k than raise
i guess i have launch at a higher RPM cuz the car booged like hell, 60ft was 2.44, ima work on launching than head back, cuz that was rediculous...car has never bogged like that before, it would always pick up after i launched, not drop down to 2k than raise
10-03-2008, 09:13 AM
#156
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Could RyanRacer48 have been right? ( referring to another thread on underdrive pulleys ) After all that bashing for just me reitterating what I was told by a professional, I may have been right?
These things are a joke, a lil toy for people who have nothing better to blow their money on.
Jn2, I will agree perhaps the OEM one would be useful for getting the rpms up while the clutch is engaged for faster downshifting.
These things are a joke, a lil toy for people who have nothing better to blow their money on.
Jn2, I will agree perhaps the OEM one would be useful for getting the rpms up while the clutch is engaged for faster downshifting.
10-05-2008, 03:23 PM
#157
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Could RyanRacer48 have been right? ( referring to another thread on underdrive pulleys ) After all that bashing for just me reitterating what I was told by a professional, I may have been right?
These things are a joke, a lil toy for people who have nothing better to blow their money on.
Jn2, I will agree perhaps the OEM one would be useful for getting the rpms up while the clutch is engaged for faster downshifting.
These things are a joke, a lil toy for people who have nothing better to blow their money on.
Jn2, I will agree perhaps the OEM one would be useful for getting the rpms up while the clutch is engaged for faster downshifting.
10-06-2008, 01:40 AM
#160
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you need to make an underdrive lightweight pulley for alternator that is sized to complement the loss of rotation for the underdrive crank pulley. just a suggestion and i would buy it asap if you had it.
10-06-2008, 04:35 AM
#161
update...idk how many miles i have on it now, but its still kicking good...cant feel it no more as i got used to it, same way u get used to all the other things, hell the tranny mounts ive had more mroe than half a year i dotn even notice :p but yeah still kickin, no signs of trouble, no CEL's pertaining to engine, only 6 from the second o2 not being there...3 codes, 3 of the same active codes pending...weird...but yeah still going strong...i have noticed no drain in the electrical system, im running a optima yellow top if it makes a diffrence
10-06-2008, 09:55 AM
#162
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Jn2 nice choice on battery.
And to the guy that called me a tool! LOL Damn u!!
Your too blunt for my liking!
haha .. Anywho . Just to clarify, I have heard multiple complaints about people having slower take offs w/ this part.
And to the guy that called me a tool! LOL Damn u!!
Your too blunt for my liking!haha .. Anywho . Just to clarify, I have heard multiple complaints about people having slower take offs w/ this part.
10-06-2008, 10:07 AM
#163
Considering this part has been out for about a month and three people have posted about installing it, where do you live/search to hear about multiple complaints about slower take-offs? That makes no sense........Basic common sense says a UDP will simply slow the AC compressor and alternator while the lighter weight takes less effort to spin (BTW overall weight reduction is minimum when you're talking about the engine's spinning mass). Those 2 areas simply free up a LITTLE parasitic power loss.
10-06-2008, 01:41 PM
#164
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Referring to underdrive pullies in general. Its a widespread failure. Companies make these to suck up peoples money. I personally have been taught to shy away from these things. I respect and trust the person who told me. I merely was posting my research, if you want it GET IT . I care about my car lasting so i wont be getting it.
10-06-2008, 04:51 PM
#165
i havent seen slower take off, just driver error, i failed to launch at the right RPM, its been a while sincei last went to the track...i dont street race, so i coudnt get enough runs to get used to launching the car...which is what i have to work on now :p i probably wont be going back until later next year when i have more mods
10-06-2008, 05:35 PM
#166
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OH ok right on. I knew it jn2 is scared of Ryans Cobalt
He wont drive 2 ohio to get smoked ... LoL j/p bro ..
I dig your work and your a class act gentlemen! Keep it up!
He wont drive 2 ohio to get smoked ... LoL j/p bro ..
I dig your work and your a class act gentlemen! Keep it up!
10-07-2008, 12:23 AM
#168
Referring to underdrive pullies in general. Its a widespread failure. Companies make these to suck up peoples money. I personally have been taught to shy away from these things. I respect and trust the person who told me. I merely was posting my research, if you want it GET IT . I care about my car lasting so i wont be getting it.
As for underdrive pulleys, I guess we need to inform ALL the serious racers of all brands of cars that have them that they don't work and should take them off immediately because they have just been duped into spending their money?!?!?! I guess this would go for the undersized pulleys the 2.0 SC owners are installing on their superchargers....BOY did GM and all the other aftermarket companies fool them. Suprising what a difference little things make isn't it.
No one is saying theUDP pulley will turn your Cobalt into a screaming race car...and for those that want one or are interested let them decide with actual information...provide your in-depth knowledge and I'll even listen.....
10-07-2008, 09:55 AM
#169
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Well, I think I've made it pretty clear on here. I'm no mechanic, by any means. I am a IT guy by career that just happens to know how to work on cars. I can't rip apart and engine and put it back together like some of you guys can.
I'm just stating from personal experiences, what I've seen from friends, & finally recently what I was told by the owner of one of CobaltSS.net's top supporting vendors.
My previous car was a 2002 Cavi z24. I had that thing souped to high hell. Prior to the RSM supercharger I had installed on it there was an under drive pulley. I didn't get the OEM size so it was a true under drive pulley. I admit I had a mild system plugged into it, but I ended up frying my entire ECU because something happened w/ my piggy back device being underpowered or something. This failure was the motivation to take it off and supercharge. I had the unit on my car for about 2000 miles, the whole time even w/o the system on, was an obnoxious pain in the butt. I'd be driving and the headlights would at times dim along w/ the dash. I felt NO performance gains from it what so ever. I did see the known increase that it gives in how fast your car revs w/ the clutch engaged or neutral. Unfortunately either due to the pulley itself, or combination of the pulley w/ my piggy back ecu thingy, it would randomly just stall out upon pushing in the clutch while cruising to a stop sign/light. I did have cams on the car, but this problem never happened until the pulley was on.
The gentlemen who explained this part to me a few weeks ago had it on an Impala, and pointed out similar issues. No performance gains, only troublesome issues that didn't have any positives to balance it out.
Don't get me wrong, this is not intended to be a bash contest. I merely am sharing my personal experiences w/ these things and what I've learned recently that further instills my skepticism of this part.
If you wanna risk throwing it on your daily driver and post some dyno results showing it was a worthwhile upgrade, I'll eat my words and apologize for unknowingly providing false information. Until then I feel my opinions are just, and worthy of being discussed.
I'm just stating from personal experiences, what I've seen from friends, & finally recently what I was told by the owner of one of CobaltSS.net's top supporting vendors.
My previous car was a 2002 Cavi z24. I had that thing souped to high hell. Prior to the RSM supercharger I had installed on it there was an under drive pulley. I didn't get the OEM size so it was a true under drive pulley. I admit I had a mild system plugged into it, but I ended up frying my entire ECU because something happened w/ my piggy back device being underpowered or something. This failure was the motivation to take it off and supercharge. I had the unit on my car for about 2000 miles, the whole time even w/o the system on, was an obnoxious pain in the butt. I'd be driving and the headlights would at times dim along w/ the dash. I felt NO performance gains from it what so ever. I did see the known increase that it gives in how fast your car revs w/ the clutch engaged or neutral. Unfortunately either due to the pulley itself, or combination of the pulley w/ my piggy back ecu thingy, it would randomly just stall out upon pushing in the clutch while cruising to a stop sign/light. I did have cams on the car, but this problem never happened until the pulley was on.
The gentlemen who explained this part to me a few weeks ago had it on an Impala, and pointed out similar issues. No performance gains, only troublesome issues that didn't have any positives to balance it out.
Don't get me wrong, this is not intended to be a bash contest. I merely am sharing my personal experiences w/ these things and what I've learned recently that further instills my skepticism of this part.
If you wanna risk throwing it on your daily driver and post some dyno results showing it was a worthwhile upgrade, I'll eat my words and apologize for unknowingly providing false information. Until then I feel my opinions are just, and worthy of being discussed.
10-07-2008, 10:06 AM
#170
Your opinion is based on problems you had with your Cavi -- now because of your problems with that car you feel it is necessary to jack this vendor's thread. Frankly, the problems you describe in your post above have very little to do with a UDP pulley.
Fact is this UDP will "slow" the alternator, but not to a point that your car isn't capable of providing electrical power. The alterator can put out FAR more power then the car needs, without a regulator it would be capable of frying every electrical component -- with or without the UDP.
Name the top site supporter who is providing you with your knowledge so we can all get educated.
Fact is this UDP will "slow" the alternator, but not to a point that your car isn't capable of providing electrical power. The alterator can put out FAR more power then the car needs, without a regulator it would be capable of frying every electrical component -- with or without the UDP.
Name the top site supporter who is providing you with your knowledge so we can all get educated.
10-08-2008, 09:27 PM
#174
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