I hear of everyone using the 2.87 pulley and getting some good gains from it... I also have heard the 34 CoG pulley helps also... (what CoG is on it now?)

Has anyone tried the 2.62 pulley which is also a 6 groove pulley for even more gains?

 

Jeez, Im happy with my 330whp! For now anyway. Ive got lots of stuff waiting to go on. These pullies are the ones on the back of blower itself? Id like to do the 3.12 next summer and have no clue

 

No, these pullies are on the front of the braket on the top right on the opposite side of the CoG pulley...

 

Oh, ok. That doesnt seem like itd be to hard to change. Thanks for the info!

 

BUMP....

Anyone w/ Vortech try the 2.62 pulley??? or know if it will work?

Would 550 injectors and a AAM work with it?

 

The 2.87 has to be made to fit...well mine did . It barely fit over the jackshaft end . So I dont thinl the 2.62 will work . Besides , there will be even less area for the serp belt to grab onto the pulley . I just tried the 2.87 and it slipped sooner [12psi ] than the 3.12 [13 to 14psi ].

 

The 2.87 pulley works Fine, Booger got a bad pulley.

The existing belt and pulley setup sucks, and will slip with 3.33, 3.12, 2.87 and 2.62 no matter what you do.

But, If you rework the setup like I did, no problems. One adjustment in 25,000miles with the 2.87 pulley. The old setup always slipped.

So, to answer your question, the 2.62 will mechanical work fine, but like Booger said it will produce 13psi+ (I'm @ 12.2 with the 2.87) I think you would need a bigger intercooler, and your closer to edge with a stock motor.

But, everybody said 3 years ago the 2.87 would be to much.

 

the 2.87 pulley puts you right on the edge of what the blower can do.

The 2.62 pulley would overdriver the blower by 10%

to my knowledge, no one has ever used a 2.62 pulley. Just upgrade to a T-trim blower instead

 

No, That Blower can handle 20% more RPM than its rated for. Manufactures like Vortech, Procharger, Hampton, Whipple, Paxton, Eaton, B&M, ect always over Engineer there products. I know- I'm an X B&M Designer and did all of the Design work on the roots type Mega Blower back in 1989. Remember your only in the high RPM for a split second, most of the time will be below 6000 RPM, even if you drive it hard. Now if you don't know how do drive a car like this? thats a different story.

 

yeah but if a 2.62 pulley won't fit anyway, seems like the only option is to just get the T-trim in the first place

 

Who says it won't fit, its the same as the 2.87 except 1/8 of an in. smaller in dia. sentry65 explan why it won't fit,

 

The 2.62 fits just fine I had to have 50thousanths shaved off the back face of the pulley the area where the belt rides then space it out on the jackshaft

you can downlaod vid of idling working on full tune but having issue about 4500 rpm @8-9psi

please save then open

http://rabbidperformance.com/gallery...ture%20058.MOV

 

I was just repeating what some other people have said. I didn't know it could fit. I have to wonder though if it's better to overdrive the stock blower which probably generates higher heat and higher intake charges, or if it's better to just use a T-trim in the first place with a 3.12 pulley cause it'll blow more air, but won't be as hot

 

Well I was wrong . But like John said , it has to milled off to get it to work , just like the 2.87 I had did . Over turning the blower isnt a big deal . It just gets out of it sweet spot so to speak .
And again you have less area for the belt to grab on to and will slip easier .

 

.

Tim...I have the stock pulley and belt set up and it works fine . The belts slip every time at 13 to 13.9psi . Even an ATI prochargers belt will slip [ not the cog ] at around 15 psi . Your set up will slip to . As the blower builds boost it gets harder to turn it and it gets to the point where a serp belt will no longer hold with out slipping.

 

I have yet to experiance any slip issues as of yet

 

John
At what psi level are you at ? And if higher than 13psi , when do you hit 13psi ? We are running the same IC and 3 in IC pipe. And did you change the pulley set up like TIMROD has ?

 

AS of now the car is regulated to 9psi @4500rpm so no I am no see the same pressure that you are. You are running T-trim correct this is still the stock SC. Still running the standard pulley set as well. I know I hit 10 just under 5 according to the EU data logging

Oh and this one is running the smaller intercooler not the 4" but the 3" core

 

Thats what Im trying to say . The belt will slip when the boost builds high enough to where the serp belt will no longer hold . With the 3.12 pulley and the belt as tight as possible , boost gets to 13 to 13.9 psi and will start to slip and grab and slip again . With the 2.87 pulley I noticed it slip even sooner...around 12psi . I ddint do much testing with the 2.87 to see if that in fact was the spot it would always slip at like the biiger pulley .

 

Ok, How are you getting 13 lbs w/ the 3.12 pulley? I have seen the highest of 9 lbs w/ it.. Are you running the T-Trim? I am thinking of going with the 2.87 if the 2.62 won't work all that well... I will need the Walbro and AAM kit, correct? or will the stock fuel set work?

I was also looking at this blower... http://www.vortechsuperchargers.com/...s/jt-trim.html

It says rated to 1000 HP... Is that just a dream? Will the belt not handle this? And what can we do to overcome this belt issue to get some real power on this SC?