I currently done some search on svt and google on the 2.55 pulley but have not found anything?? I just wanted to know if the belt would spin with 90mm idler?? and how much more power would it make vs 2.65???
2.55 Pulley HP
- Thread starter whitecobra2387
- Start date
I would estimate 2.5 pulley would add about 1 more pound of boost and increase horsepower 10 to 20 hp depending upon tune being 93 or 91 octane.
Currently have the 2.59 but just wanted find out if the 2.55 would make more 7-10 but don't want risk belt slip
any info?? or suggestions
Would the vmp pulley/tune make more power vs lethals metco/tune? b/c a slightly smaller pulley?
I've never heard of anything smaller than the 2.59 VMP pulley fitting on the stock (unmilled) front drive.
OP, of every .1 in pulley size reduction....you gain 1 PSI.
OP, of every .1 in pulley size reduction....you gain 1 PSI.
Wow, never heard of anything smaller than a 2.65 RR upper pulley
Just learned something new today
op:
Just learned something new today
op:
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Yeah, Sylvain now makes a 2.50" upper that will fit without snout modification. He is making me a 2.40" upper that I am going to install on a snout modified M-122.
I saw on steggys site they modify the snout to accept a 2.2 pulley. I bet that thing would scream.
What is the link to purchase this 2.50 pulley for the stock blower? Your assistance is appreciated.
I would assume the 2.2 upper would be the equivalent of a 2.60 upper with a 15 IW lower pulley.
I do believe the boost is about the same. I may go this route after I port my blower. These crank failures have got me second guessing doing a lower, which was going to be my next mod. I like the idea of keeping my stock belt also.
Must have link!
My thoughts exactly. The only way is to make the thinner, and that doesn't seem to be a good way.
You can make it thinner and turn the snout down to make it clear. You can also change the material to something stronger so you can make it thinner and keep the same strength.
Okay..... Here you go:
Automobiles Libert
Actually, the owner of the shop is a respected member of SVTP. Screen name Autoliberte. His shop is in Canada. There is not any information on his site about the 2.50 or 2.40 inch pullies but you can PM him here or email at [email protected]. for information. He is custom making my 2.40" and shipping directly to Posi who I have given a spare M-122 to for porting.
I considered the 2.50" which he just came out with, but want to maximize boost levels without adding a lower pulley. Not sure how the 2.50 fits without snout modification, but assume like everyone else that he has used thinner materials in the pulley contruction.
Also thought about the the Steigemeier "Multi Stage Boost Kit" which has a 2.2 upper available, but didn't want to spend the cash. Serickson1 is running this setup with a 2.2" upper and a 10% IW lower. He hits 20+ lbs of boost and has run a 10.56 @ 132 with this combo. Here's the link for the Steigemeier kit:
Stiegemeier Front Drive Reconfigurations
Or...you do it my way. I redesigned the grooves so that the pulley retains the same wall thickness and strength.
Precision machined bore to OEM specs with black anodized finish. The result: a 2.50'' pulley that fits the stock s/c
without modding the snout which helped push my 4000lb GT500 to a 10.48 @133.66 :rockon:
[youtube_browser]23LjQpd4k8c[/youtube_browser]
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