Originally Posted by Unreal

I could tell you if it was an ECS kit, but even then there is some guess work involved. I had to try 2-3 belts to find the right size. Current one (52.25" I believe) barely fits on, and took 2 of us an hour to wrestle on. The 52.75 goes right now by myself, and puts tensioner in the middle.

Abdul (local 1300rwhp Dsteck/CBI built car) runs a A&A 8 rib ysi/direct drive, and would be a good person to ask.

Originally Posted by breecher_7

I can give him the correct length using a 8" lower and 2.75" upper and the A&A kit but im not sure about any other pulley combo. 53.5" gets it done...

Originally Posted by realcanuk

I have to check my lower. ATI 8% overdrive. I will get the size. For the upper I don't imagine I will be going that small, but you never know.

Originally Posted by breecher_7

Just do it and use a restrictor plate to limit peak boost. That way you don't loose the bennifit of the blower spinning fast out of the gate.

Originally Posted by realcanuk

I will experiment a bit. I think the smaller pulley I got with it is 2.875 ??

Is a restrictor plate something I buy or make ?

Originally Posted by realcanuk

I have to check my lower. ATI 8% overdrive. I will get the size. For the upper I don't imagine I will be going that small, but you never know.

Originally Posted by turbotuner20v

I actually just emailed them. They say 8" drive diameter (8.19" overall diameter)

Originally Posted by realcanuk

I just looked up the one they sold me. It says 7.53 on there site. Are we talking damper or shell assembly size ?

This is what I have.. quote from ATI email...

8 rib damper P/N 917345 by itself you have to specify that you want it built with the 8% overdriven shell assembly P/N 917107

Guess I will call also.

Originally Posted by Unreal

I would just keep the eforce if it was me. Best blower ever, and PD torque can't be beat.

Originally Posted by Unreal

I would just keep the eforce if it was me. Best blower ever, and PD torque can't be beat.

Originally Posted by turbotuner20v

yea, the whole 'shell #' thing is pretty confusing... took me a while to get mine ordered right

I use this conversion page, even though I just care about the balancer #
http://www.atiracing.com/products/da...harger.kit.htm

8% OD – 7.960” Overall Dia, uses shell assy, 917107

Originally Posted by realcanuk

That's exactly what I am using. So I guess its what they consider 8.0

Good info.. thanks.


Got an IW with this kit, but prefer mine.. I will sell it.

Originally Posted by realcanuk

That's exactly what I am using. So I guess its what they consider 8.0

Good info.. thanks.


Got an IW with this kit, but prefer mine.. I will sell it.

Originally Posted by breecher_7

You prefer the ATI over the IW?

Originally Posted by turbotuner20v

my 8.19" = 8" drive diameter (used for blower rpm calc)

So your 7.96" probably = 7.77" drive diameter

I'd be curious what ATI says though.

Originally Posted by realcanuk

I personally like the ATI better, for no real reason. I have heard nothing bad against either.

In this case I will leave my ATI because it is new, and it is on the car. I see no advantage to changing it.

Originally Posted by breecher_7

Im just trying to start an argument...

Originally Posted by realcanuk

From now on you are known as the "ATI basher"