Help For The New GM Spec 2.8 pulley!
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Joined: 05-27-06
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From: Sumter, SC
After GM installs my stage 2 and does the reflash..I want to go to Jim at pulleyboys for the 2.8 pulley. Do I THEN have to go back to GM for the reflash again after I install the 2.8? If so how will that work? They probably won't do it bc the PB pulley is on there. Can someone clear that up for me? If I don't have to.....is that it, or do I do the battery reset like y'all are talking about and that will solve it?
help
Thx
help
Thx
Senior Member
Joined: 07-06-04
Posts: 2,082
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From: Spaceball 1 or better known as CT
Originally Posted by SUKXOST
After GM installs my stage 2 and does the reflash..I want to go to Jim at pulleyboys for the 2.8 pulley. Do I THEN have to go back to GM for the reflash again after I install the 2.8? If so how will that work? They probably won't do it bc the PB pulley is on there. Can someone clear that up for me? If I don't have to.....is that it, or do I do the battery reset like y'all are talking about and that will solve it?
help
Thx
help
Thx
Senior Member
Joined: 05-27-06
Posts: 2,921
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From: Sumter, SC
Thanks for the heads up! Now I know what to do then!!! Going on 3 months ago ordered stage2....getting a little anxious to say the least!!!!! Everyone else still waiting for theirs been that long?
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Joined: 03-29-06
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From: Eden Prairie, MN
Originally Posted by SS_SC_Cobalt
OH, putting it ON, lol
You put it on with an installer tool, GM recommends an alternator pulley installer, but a lot have used 3rd party install tools for s/c's
You put it on with an installer tool, GM recommends an alternator pulley installer, but a lot have used 3rd party install tools for s/c's
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Joined: 07-06-04
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From: Spaceball 1 or better known as CT
Originally Posted by Mike06cobalt
My buddy and I were talking to some semi mechanics yesterday and they said they would just use a correct sized bolt some washers and an impact wrench. As the bolt and washers pushes on the hub you'll be running out of threads so you just add more washers to compensate. Sounds like a jimmy rig way (not surprised coming from semi mechs) so I'll probably look into the installer tool.
Thread Starter
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Joined: 03-21-06
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From: CT
Originally Posted by SS_SC_Cobalt
I would use the installer tool, it has bearings, but if you go that route, use antiseize between the washers and that will make a rudimentary bearing for ya!
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Joined: 01-15-05
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From: Ottawa
Originally Posted by CTCOBALTSSS
Yeah that should fix it. Let us know....
I updated with an additional 2.8" discussion thread link.
I updated with an additional 2.8" discussion thread link.
Car feels better, does not hesitate but still feels as if its being held back. Can't wait to get my car tuned!
thats it
New Member
Joined: 05-18-06
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From: New York
so how much smaller of a pulley could be made to fit on the gm modular hub?? i don't have stage 2 yet so i have no idea how the fitment of the 2.8 on there looks like. Is there room for a 2.7" or possibly a little bit smaller? Or are the 2.8 and 2.79 that last stand?
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From: Spaceball 1 or better known as CT
Originally Posted by jcbravez
so how much smaller of a pulley could be made to fit on the gm modular hub?? i don't have stage 2 yet so i have no idea how the fitment of the 2.8 on there looks like. Is there room for a 2.7" or possibly a little bit smaller? Or are the 2.8 and 2.79 that last stand?
and a 2.79 is NOT going to give you anything over a 2.8
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Joined: 02-06-06
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From: Hamilton, ON, CA
Originally Posted by SS_SC_Cobalt
2.8 is it...hub is too large for anything smaller
and a 2.79 is NOT going to give you anything over a 2.8
and a 2.79 is NOT going to give you anything over a 2.8
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Joined: 02-26-06
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From: New York
Originally Posted by CTCOBALTSSS
Well for every .1 you take off the pulley size you should gain around 10hp.
Gm Stage 2 pulley is 3"
So a 2.8" pulley should yeild around 15-18hp realistically.
I will update the thread!
Gm Stage 2 pulley is 3"
So a 2.8" pulley should yeild around 15-18hp realistically.
I will update the thread!
correct me if im wrong
Thread Starter
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Joined: 03-21-06
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From: CT
Originally Posted by cobss187
I like the way that sounds, cause mathematically a 2.8 pulley by that scale should yield a 20 hp gain. If it was a 15-18hp gain then the pulley size would be a 2.82-2.85inch pulley. Taking other things into consideration was a smart idea. Well at least thats wut i think you did lol
correct me if im wrong
correct me if im wrong
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Joined: 05-25-06
Posts: 181
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From: New York
Originally Posted by CTCOBALTSSS
No you are absolutely right. I'm just being realistic.
Thanks for all this info - this sounds like the best way to go for those of us not looking to go insane with our cars and still want to have a *chance* a keeping the warranty.
BTW - the bit for the GM hub bolts looks like a star bit, not some special GM only bit. They might be hard to find, but companies like Snap-On or Mac or Matco should have sets or even sell you individual bits. And if you got your bit back and it looks helical (twisted), it's because they tightened the bolts too much. Same thing happens with a Torx bit - they'll get a twist in them if you turn them too hard.
Thread Starter
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Joined: 03-21-06
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From: CT
Originally Posted by xl1200r
Realistic is right...think about it...if the stock pully is 3.6, then going to the GM stage 2 would get you about 265hp, and the 2.8 would get you 285hp...not going to happen.
Thanks for all this info - this sounds like the best way to go for those of us not looking to go insane with our cars and still want to have a *chance* a keeping the warranty.
BTW - the bit for the GM hub bolts looks like a star bit, not some special GM only bit. They might be hard to find, but companies like Snap-On or Mac or Matco should have sets or even sell you individual bits. And if you got your bit back and it looks helical (twisted), it's because they tightened the bolts too much. Same thing happens with a Torx bit - they'll get a twist in them if you turn them too hard.
Thanks for all this info - this sounds like the best way to go for those of us not looking to go insane with our cars and still want to have a *chance* a keeping the warranty.
BTW - the bit for the GM hub bolts looks like a star bit, not some special GM only bit. They might be hard to find, but companies like Snap-On or Mac or Matco should have sets or even sell you individual bits. And if you got your bit back and it looks helical (twisted), it's because they tightened the bolts too much. Same thing happens with a Torx bit - they'll get a twist in them if you turn them too hard.
If I Get My Stage 2 And This Pulley Tomorrow... Swap Them In The Box... I Wonder If The Dealer Would Notice... They've Never Installed One Before. Hmmm... Evil Plans!
Thread Starter
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Joined: 03-21-06
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From: CT
Originally Posted by USMCFieldMP
If I Get My Stage 2 And This Pulley Tomorrow... Swap Them In The Box... I Wonder If The Dealer Would Notice... They've Never Installed One Before. Hmmm... Evil Plans!
BTW! Thanks for all your hard work out in the field bro. We all appreciate it!
