Ok, heres the background info first. ;)

I'm currently designing a 2.2 Ecotec pulley for my J-Body community. This will also work on HHR's & Cobalts. I currently have a 2.0 Cobalt SS pulley. I have been told that the only difference between the two are the number of ribs for the belts. I agree with this, but would like to get my hands on a 2.2 ecotec pulley to confirm other dimensions. With out taking it of my HHR. The alternator pulley is currently in production since it is the same as a 2.4L twin cam "quad 4 motor." :smile:

I just really want to know if I can get my hands on a 2.2 crank pulley. Does anyone have one or can obtain one... :poke:

Any comments or remarks are welcomed.

My first option would be to try checking your local junk yard.

Local yards have NONE. :confused:

"Dealer Item" - just buy one from your local dealer (he'll most likely need to order it).

That's what we do when designing new parts. :thumb:

Yeah I can just do that I just do not want a part that I am never going to use again. But worse comes to worse I'll just buy one. :(

It's pretty much the only way with a new vehicle like this, we have had to buy shocks, struts, rotors, rear beauty bar, - all just to get parts to prototype off of. Hopefully you will make your money back in the end...

Got one off a 2004 cavalier. I'll take my fender well lining off to make sure it is the same as the HHR. Hope to have it completely designed by the 4th. :beer:

Ecotec Preliminary update :) Finally NJHK thanks for the pulley :)
http://memimage.cardomain.net/member_images/3/web/627000-627999/627882_169_full.jpg
http://memimage.cardomain.net/member_images/3/web/627000-627999/627882_170_full.jpg
http://memimage.cardomain.net/member_images/3/web/627000-627999/627882_171_full.jpg

dont know but i got that one you sent me and i got my lighten pulley from zspec and the ribs match and width so good work.........getting them installed next week =)

dont know but i got that one you sent me and i got my lighten pulley from zspec and the ribs match and width so good work.........getting them installed next week =)
Please inform me how the alternator pulley fits your 2.4 ecotec.
Thanks,
Mike

Any ideas to what the power increase would be?

i heard like 5hp but i'll let u know my interp

You can get 5 hp from just replacing a lighter pulley???

what some one told me then another said about .8whp dont know just heard it revs alot faster, i have one will get it installed on the 1st i'll let you know if you can really notice a difference

You can get 5 hp from just replacing a lighter pulley???

Your not really "gaining" horsepower. Your more like "freeing up" lost horsepower. A lighter pulley means the engine doesn't have to work as hard to turn your belt. Lighter pulley will make a difference on how quick the engine revs and free up some parisitic loss from turning your accessories (alt and A/C pulleys). Not sure of 5 from a pulley but have heard a 5-8 Wheel gain from using a kit like AEM's that replace more than one pulley.

Hope it helpls!

i gained 8 hp on my sentra from a lightened pulley, gained 10 hp from my lightweight flywheel. or i guess you could say got back 18 hp with the combo. it did rev alot quicker, i think it was something like 1 hp for each 2lbs removed from the crank. aftermarket pulley weighed 5 lbs, and the flywheel weighed in at 11 lbs FYI.

last thing i want to do is lighten flywheel...........after cam's, injectors', all bolt on's, tune, etc.........

I put a lighter flywheel in my Datsun 280Z and it made a big difference in how fast the car revved and came back down. It also made starting a lot trickier. But that, a bigger throttle body, recurved distributer, headers and exhaust, and lighter body parts (fiberglass hood, fenders, hatch, and headlight buckets) all contributed to a mid 15 second car. And it would have been much quicker with slicks. The car had tons of wheelspin, and my quickest runs were when I did NOT powershift 2nd gear (the car broke traction and began turning sideways). It even chirped 3rd gear (right before the finish line) so bigger gears were also needed (the car had a 5 speed).

I just find it hard to believe that enough weight could be saved from the relatively small pulley(s).

Smaller pulley would react the same as the flywheel mentioned. Same philosophy just not as much power is regained though.

How much do these lighter pullys cost? seems like you would get more power from an air intake and a higher flowing muffler. If the price is right I may have to try the lighter pulleys after I get an aftermarket higher flowing muffler. It should increase gas mileage too, since it will make the engine more efficient.

When i made pulleys for my cavalier it made 8 more HP and 6-7 more ft-lbs of torque. When i sold them to the cavalier guys they were 50 for the alternator pulley, and 125 for the crank pulley. Cavy on the dyno. Yes it is an automatic. (http://videos.streetfire.net/search/z24/0/34d32a94-d23e-474a-b77c-983500d2307a.htm) :nuts:

How hard are they to change?? Because 8 HP for $175 is not bad. Between that and the 15 from the intake and exhaust, we could be real close to 200. And that would make for a car in the 15's (although high).

Lee you are thinking just Hp trust me alot goes into whp...there is a huge debate weather or not the 2.4L will make 200whp or not.........What every one agrees on is that you will need intake,exhaust,headers and tune=160whp(proven dynos' and videos if you want links let me know) Then there are these cams coming which should add another 20-28whp...so what the word is, is that it is going to take alot to hit that 200whp N/A...Do able YES! but are you willing to do all these mods'

Or just save your cash and buy the new HHR SS with 260hp stock.

Then you have a much stronger base to start from...

it hasn't been a set in stone yet............

GM announced it today, you can read about it here: HHR SS (http://www.autoblog.com/2006/10/23/chevy-hhr-ss-acknowledged/)

wow wonder what the price will run

Man, ID lose my ass if I traded my HHR in for a SS HHR. :(

L61 & LE5 pulleys (http://www.ecotecforum.com/forums/forumdisplay.php?f=89)