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JRSC belts & pulleys: please discuss it here

49564 Views 819 Replies 63 Participants Last post by  iamsyko
I know a lot of us JRSC guys having or had problems with our belts and pulleys and a lot of time we hijacking other threads because of it, so I thought it was a good idea to start up on a thread just about jrsc belts and pulleys. The thread is not only for current jrsc peeps but also for the newbies as well so they won't get us frustrated asking the same question over and over again.

I'll start off with one question, I read around and found a member who is using a goodyear 070775 belt which is 7 rib and 77.5 inches long. I tried a dayco belt that was 77.5 long and it wasn't even anywhere close to fitting onto the 3.4 pulley. The dayco 78.9 belt fit extremely well for the purpose. What I want to know is that anyone else tried the goodyear 77.5 long on a 3.4 pulley or is it because different makers make belt a little bit different in length.

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3" Pulleys; where to buy 'em...

I loaned this guy my stock JR pulley as a model and he did up a 3.2" and a 3" for me. Quality is better than stock (nice black anodize finish and +-.005" on dimn.) :thumbsup:

Click on "Acura RSX-Integra".
Not yet...haven't taken delivery on my car yet. :jigglemad
Kind of concerned about the scissor bracket though, keep us all posted on having a steel one fabricated.
alphaSSmale said:
Does anyone know the easiest way to remove the blower pulley? Do I need to buy a pulley puller?

The're not that expensive...try a pawnshop for used or buy new at Sears.
You never "beat" a pulley off of a SC shaft, you'll fawk up somthing for sure. I'm amazed you guys didn't warp the shaft or the pulley.
MOROSO Honda Crank Pulley Wrench :thumbsup:
You hold the crank pulley with this and loosen the bolt thru the center hole.
So what in hell did they find wrong, how did JR fix it and did they use any different parts than are in the kit?
Just saying "they fixed it" is useless :lame: info...all of us who live outside of CA may have to deal with this belt shred issue and we could benefit with more meat and less rice. Did they replace everyones' idler pulleys with metal ones? Or what?
lanman2000 said:


alpha has contributed more to this board than 95% of the people on it... his experiences have helped countless JRSC installs go smoother (including mine)... so shut your face and get lost... NOOB :firemad:
I did read alpha's post. I wasn't talking about him. I was talking about you, you post-jacker. This is a thread about JRSC belt problems not what kinda bumper Jackson has on their car.
I was looking for specific mods that anyone could try that is having a problem. It's nice that some Jackson customers are close enough to them to get their cars fixed, but what about someone in say Florida? Jackson can't fly down and rent a shop to fix their car, so having specific info would be a great help. And I'm not a NOOB. I wrenched together my first hot car in 1976, my first Integra fourteen years ago and was trained by Gates/Dayco in design, installation and troubleshooting of belt drives in 1980.
Asshat? Maybe you should change your post handle to "LAMEMAN 2000" :flame:
wdsonny said:
RC 750cc injectors and K24 crank pulley. Install both of those, hook up the laptop, retune, datalog, tweak and hit the dyno. Not too worried at the moment. Got big plans come October time frame. Looking at a port/polish of the head, 3inch blower pulley, sleeved block, forged pistons/rod, upgraded valve springs/retainers, bored out TB and to top it all off 75 shot of nitrous.
Hey wdsonny,who's gonna do your port/polish?
tt061880 said:
take it easy guys, this thread has a lot of good info on it, I go back to this thread from time to time so the last thing we want is for this thread to be deleted.

anyone here tried out pulleyboys 9psi pulley yet? I want to step up to 9psi but I dont know if I should trust pulleyboy or not, what does everyone else think?

I had pulleyboys work up the JRSC pulleys for RSX's and assisted with development (pulley pictured on their website is mine). My dealings with Brian W. were rewarding, he's a true professional and I measured the pulleys I received against my JRSC pulley on a surface plate and tolerances were +-.005, shaft bore was perfect, finish & plating were better than Jackson pulley and belt grooves were cut to ASTM specs. and checked on an optical comparitor. Thought the prices were fair and quality great. I would recomend...go for it! :thumbsup:
i VieTEC said:
I need a 3.6" pulley. Do they have that?
No, but e-mail them for a price quote for one. It is not difficult to change the diameter after the original CNC program is created, so it shouldn't cost you an arm and a leg. ;)
JordoKap said:
What would happen if you were to put "underdrive pulleys"?

like if i were at 8psi, then put a oversized pulley on my alternator?
Nothing would happen to the boost. It's driven off the crank pulley (as is the alternator). You might pick up a fraction of a hp, but depends on the electrical load on your alternator i.e. turn off everything you don't need like CD player, vent fan, etc. :thumbsup:
TypeSupercharged said:
How much are you selling the pulley for, and what psi is it, also anotha question, whats the best way to route the belt, the jrsc way or a diff way?
Ive thrown like 4 belts already, kant seem to find the problem, still a newbie wit the supercharger.
Sorry, pulley is sold. I'll mod my sig. :eek:
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