any of you guys know where to get a cog set up for the d1sc ati says no asp wants big dollars any help would help thanks

 

Is a 4th gen a simple matter of a crank/blower pullies and idlers? I'm not familiar with your crank, but ATI makes their own blower pullies and have a limited selection of cog idlers. Larry at ASSC fabs cog idlers that ATI doesn't make. Crank? I don't know what your setup is. Is there anything else I'm not aware of?

 

Why do want a cog? you shouldn't need one to drive a D1, and they are not really street friendly.

Rich Krause

 

...and they are not really street friendly.

I disagree. I've been running cogs on a daily basis for over one year with no problems at all to speak off. You just have to make absolutely sure detonation does not occur because running cogs can be unforgiving.

Willie

 

Well it seems some of the LS1 peeps are having a little trouble trying get to get there belts from slipping. Especially the ones that are really pushing theres upwards to 15-16psi. I thinks its the lack of a 12-rib pulley, ATI doesnt offer one for them.

 

I am using a 12-rib.

Rich Krause

 

LS1's dont have that option, heck they just came out with an 8-rib pulleys not too long ago.

 

Thanks, didn't know that.

Rich

 

If you look at how the Prochargers are mounted on the LS1 vs. the LT1, you'll see why there isn't a 12-rib pulley for the LS1. The supercharger is mounted 180 degrees from where the LT1 is mounted, due to the accessory routing on the LS1's. This limits the clearance for belts. This is also why there are now some really monsterous crank pulley's (and larger supercharger pulleys) to help eliminate the problems with belt slippage.

I know from a few local guys it is a big problem. My car club's webmaster has a P1-SC, running 6lbs of boost, and has had slipping issues. He is going to ported heads/cam and more boost, and is having to go to large crank pulley setup to try to eliminate this problem. A guy I talked to at the strip a little over a year ago was running an ARE motor w/ a D1-SC, running high 10's w/ a 6-speed, and said he was selling the supercharger and going turbo that winter simply because he couldn't get the thing to quit slipping the belts. I haven't seen the car since, so I can't say if that's what he did or not.

 

Some guys have had problems with cogs, others have not. The one thing I can see between the two is the amount of money spent on the setups. The guys with some good money (and design) into their cog setups run with no problems....even with 6spd's.

Jason

 

Hey Jason: you are getting at what is the (potential) problem with a cog. They don't slip, which seems like a good thing. But a blower impeller has a lot of inertia. When it's spinning at high speed and there is an upshift, the blower wants to keep spinning and overruns the crank pulley. This may cause the belt to strip a tooth, and once one tooth strips the whole belt goes. Having a hella big bypass valve will help as this decreases the load on the belt when the throttle is snapped shut.

One of my buddies with a Mustang was having this problem with his Procharger F1R, and that is on a car with clutchless tranny. Solving it required a complete redesign of the setup. Like you said, it's just money (and time and skill). He went through a lot of $125 Kevlar belts getting it sorted. Sounds like there may be no choice on an LS1 car that is running high boost though. I will say that it wasn't easy fitting a 12-rib on my LT1 car either. Took some creative work with the bracket and the radiatir fan housing and radiator. Not a huge deal, but not plug-n-play either.

Rich Krause

 

Hey Rich, yeah I am familiar with the problems when using cogs (stripped teeth on belt) usually occuring between shifts.

I am sure I am missing something, but it seems like cogs (and belts) do just fine on cars that have proper tensioners....something overlooked by alot of people. I could see dropping $1k on cogs/tensioner that would probably work fine on our cars. Even on M6 cars, guys have run cogs with no problems (that I know of); their setup is just huge money.

I am not going to try cogs at this point, too much money! I am going to use an 8-rib setup on my YS and hope for the best.

Jason

 

The cog teeths on the F body setup are very tiny at least last time I saw it in person at ARE.

I am running a cog setup on my LT1 vette. I am using a Rice Burner Timing cam belt out of Toyota supra/celica motor. The teeths on this belt are much bigger.






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hi Jason
How are you doing man. I see you are going to forced induction eh? Stop by some time if you around my neighborhood.


Bruce

 

Hey Bruce, how are ya man? Good to hear from you! I didnt realize you had a cog setup on your car. How has it been working for you?

Did you get any dyno or track numbers with your setup yet?

Yeah, I just realized that I would never go as fast as I wanted to NA, so I sold all that stuff and bought a YS setup. I want a true street car that will run high 9s@140+

I am in Rochester 4 days/week.....we should hook up sometime!
Jason