Wow... I thought Procharger was making them this way now. Ive been running that same setup for a good 3yrs now.... through the shop I bought my Procharger I was told that I was getting a prototype J bracket (from Procharger) with a extra idler on it for better belt wrap. I figured that since it worked so well for me that they wouldve started producing them after that, I never checked to see if they actually did. Guess not!
I actually had the SDCE setup ready to install when the owner of the shop I bought my D1SC through told me to try out the prototype J bracket.... so I sold the SDCE stuff and went with the new J bracket for hundreds less.
Ive had ZERO belt slip issues since I installed it.... only had to replace one idler bearing but that was it.
__________________ ----------|02 35th Ann. Limited Edition SS A4 T-top.|-----------
----------651rwhp/558rwtq. (11.4@128mph. 2.0 60')----------
-------------Tuned by Rick @ Synergy Motorsports-------------- |Procharger D1SC|FMIC|Circle D 4C|Custom Cam|6.0L Heads|Moser 9"|FLT 4L80E|
Awesome! Glad to hear its already a proven design! This is the way the fbody procharger setup SHOULD be!
It really doesnt get any better than this.... the belt wrap is insane. I have the belt torqued down to the point where there is only about 1/8" between the belt surfaces.
Youre right... Procharger should have made them this way from the get go.
__________________ ----------|02 35th Ann. Limited Edition SS A4 T-top.|-----------
----------651rwhp/558rwtq. (11.4@128mph. 2.0 60')----------
-------------Tuned by Rick @ Synergy Motorsports-------------- |Procharger D1SC|FMIC|Circle D 4C|Custom Cam|6.0L Heads|Moser 9"|FLT 4L80E|
Do you know the diameter of the stock LS1 idler pulley? I am hoping that the idler pulley from my F-body LT1 will be the same diameter.
EDIT: Never-mind, I just went out in the rain and measured it. It was hard to get an exact measurement with the belt around it but I am guessing that it is a 3" pulley. The LT1 pulley diameter is just over 3.5" X 1.2" wide but the bearing will fit on the modified standoff. This 3.5" pulley may benefit me since I am running a 6 rib setup with the stock 6" crank pulley?
Took the TA out for some test driving today. Its sunny and about 70* and traction conditions are way better than they were the other day, but I still can't get past 5000-5500 RPM without spinning the tires I even tried in 4th gear a couple times. It sure is scary having the tires break loose at 90mph!
Breaking the tires loose at 90 will make the ass hole pucker really quick Might have to swap out those rubber bands for some real tires.
Do you know the diameter of the stock LS1 idler pulley? I am hoping that the idler pulley from my F-body LT1 will be the same diameter.
EDIT: Never-mind, I just went out in the rain and measured it. It was hard to get an exact measurement with the belt around it but I am guessing that it is a 3" pulley. The LT1 pulley diameter is just over 3.5" X 1.2" wide but the bearing will fit on the modified standoff. This 3.5" pulley may benefit me since I am running a 6 rib setup with the stock 6" crank pulley?
Thought I had mentioned it somewhere in here already, but oh well, the stock LS1 idler is 3.00" diameter. The bigger diameter you put on the standoff, the less adjustment you will have for the tensioner, so keep that in mind.
Quote:
Originally Posted by conan
Breaking the tires loose at 90 will make the ass hole pucker really quick Might have to swap out those rubber bands for some real tires.
No doubt! Yea, I'd like to get some 305/30's next time around. I'm sure they will fit the wheels since they are 10" wide. And actually, when I was having these 285's mounted, my buddy switchin the tires measured, and they are really 10.5" wide, so I bet 305's wouldnt be a problem at all.
__________________ 2002 Trans Am M6, forged 9.2:1 370, F1 procharger @ 12psi, comp SC2 cam, mild ported AFR 225 heads, MAC midlengths, Borla, full suspension, 3.73 12-bolt, Mecham Hood, 19x10 Polished CCW 505A's 700ish RWHP/ 600ish RWTQ (still ironing it out)
Thought I had mentioned it somewhere in here already, but oh well, the stock LS1 idler is 3.00" diameter. The bigger diameter you put on the standoff, the less adjustment you will have for the tensioner, so keep that in mind.
Your crank pulley is 7.65" and mine is a 6" so I should have no problem. I am pretty sure I am going to have to go with a longer belt.
I think I still have my idler pulley that came with the factory Procharger bracket set up before I sent it to SDCE. That should work out for the second idler. Although currently I am not having any belt slip issues.
__________________
1.44 60 ft. 403/D1SC/4L65E/PY3600 3800# street car
Nice pics man! So are you utilizing one of the other bolt holes above the extra idler? Or are you using just 4 bolts to hold the head unit to the bracket?
__________________ 2002 Trans Am M6, forged 9.2:1 370, F1 procharger @ 12psi, comp SC2 cam, mild ported AFR 225 heads, MAC midlengths, Borla, full suspension, 3.73 12-bolt, Mecham Hood, 19x10 Polished CCW 505A's 700ish RWHP/ 600ish RWTQ (still ironing it out)
If at one time there was a prototype j-bracket utilizing a second idler pulley I wonder if ATI ditched it because of the access issue to one of the head unit to j-bracket bolt holes?
__________________ One owner 98 WS6 Ram Air Formula- ATI P1 at 9 psi, nitrous kit, Moser 9" rear(yes it whines), MT street radials, Hotchkiss springs, LCA's, SFC's, Hooker's and a custom catback, Weiand, Centerforce clutch, etc..
I sketched up the system in inventor just to get an idea on what the belt size would need to be for my 3.7 pulley. I did the best I could by just measuring pictures that I had as I didn't want to remove the procharger again just to measure, but I think I am pretty close. If nothing else, this should give a pretty accurate ballpark idea of belt length. Just for grins, I also measured the belt wrap on the head unit and the crank. Here are the results I measured in inventor:
Crank Pulley/ Head Unit/ Tensioner/ Idler/ Belt Length/ SC Wrap/ Crank Wrap
7.65/4.25/2.5/3.0/42.93/229°/272° <--(this belt length verifies my CAD file is pretty damn close- reference my original measurement was 42.75-43.125 with a tape measure- this falls smack dab in the middle of those measurements)
7.65/4.25/2.5/2.5/42.62/225°/266°
7.65/3.7/2.5/3.0/41.85/221°/272°
7.65/3.7/2.5/2.5/41.56/217°/266° (looks like I'll possibly be able to use my 41.5 belt with this setup once I'm ready to pulley down)
Again, remember that the stock procharger idler is 2.5", and the stock accessory idler is 3.0. Hope these results help for some of you guys. If anyone wants me to put in any more pulley sizes, let me know and I'll get them for ya.
__________________ 2002 Trans Am M6, forged 9.2:1 370, F1 procharger @ 12psi, comp SC2 cam, mild ported AFR 225 heads, MAC midlengths, Borla, full suspension, 3.73 12-bolt, Mecham Hood, 19x10 Polished CCW 505A's 700ish RWHP/ 600ish RWTQ (still ironing it out)
Last edited by ChevyChad; 10-26-2009 at 09:42 PM..
Ya know I dont know any different from a J bracket without the second idler.... my D1SC is only held on by the 4 bolts. Again... Ive been running it this way for a few years now with no issues. I suppose we could devise a much smaller idler so the 5th bolt hole would be accessed.
__________________ ----------|02 35th Ann. Limited Edition SS A4 T-top.|-----------
----------651rwhp/558rwtq. (11.4@128mph. 2.0 60')----------
-------------Tuned by Rick @ Synergy Motorsports-------------- |Procharger D1SC|FMIC|Circle D 4C|Custom Cam|6.0L Heads|Moser 9"|FLT 4L80E|
I sketched up the system in inventor just to get an idea on what the belt size would need to be for my 3.7 pulley. I did the best I could by just measuring pictures that I had as I didn't want to remove the procharger again just to measure, but I think I am pretty close. If nothing else, this should give a pretty accurate ballpark idea of belt length. Just for grins, I also measured the belt wrap on the head unit and the crank. Here are the results I measured in inventor:
Crank Pulley/ Head Unit/ Tensioner/ Idler/ Belt Length/ SC Wrap/ Crank Wrap
7.65/4.25/2.5/3.0/42.93/229°/272° <--(this belt length verifies my CAD file is pretty damn close- reference my original measurement was 42.75-43.125 with a tape measure- this falls smack dab in the middle of those measurements)
7.65/4.25/2.5/2.5/42.62/225°/266°
7.65/3.7/2.5/3.0/41.85/221°/272°
7.65/3.7/2.5/2.5/41.56/217°/266° (looks like I'll possibly be able to use my 41.5 belt with this setup once I'm ready to pulley down)
Again, remember that the stock procharger idler is 2.5", and the stock accessory idler is 3.0. Hope these results help for some of you guys. If anyone wants me to put in any more pulley sizes, let me know and I'll get them for ya.
you sir are a good man could you please help me with belt size?
crank 7.25
head unit will be 3.40
thanks man
I can't picture what the 0.59" diameter section of the standoff is for? If the pulley rides on the 0.668" diameter section why mill that short section down even more? Please help me out.
Also how do you keep the pulley from rubbing on the bracket? I see Avengeance has a slight gap between the edge of the pulley and the bracket, how is this achieved?
__________________ "The Corn Chicken" - The First Corn Blown F-Body....10psi->570RWHP/490RWTQ 2001 SOM WS6,M6,#10/195, Procharger D1SC,8rib,CustomFuelSystem,Spohn PHB & LCA,UMI TA & 3ptSFC,TPIS Headers,ORY,MagnaflowCB,DynomaxBullet,RUFF 278's, E85 Flex-Fuel Tune By Andy @ Dynotune
Ricky- I'll check that tonight for ya when I get home man.
Quote:
Originally Posted by No Juice
I can't picture what the 0.59" diameter section of the standoff is for? If the pulley rides on the 0.668" diameter section why mill that short section down even more? Please help me out.
Also how do you keep the pulley from rubbing on the bracket? I see Avengeance has a slight gap between the edge of the pulley and the bracket, how is this achieved?
This is the way the fbody procharger setup SHOULD be! 
I even tried in 4th gear a couple times. It sure is scary having the tires break loose at 90mph! 
Might have to swap out those rubber bands for some real tires.
So are you utilizing one of the other bolt holes above the extra idler? Or are you using just 4 bolts to hold the head unit to the bracket?
One owner 98 WS6 Ram Air Formula- ATI P1 at 9 psi, nitrous kit, Moser 9" rear(yes it whines), MT street radials, Hotchkiss springs, LCA's, SFC's, Hooker's and a custom catback, Weiand, Centerforce clutch, etc.. 
