best pulleys 11mm 8 mm or 14mm?

Which style is the best to run?

Thanks,

Sean

 

Best pulley Size

Interesting question, look forward to reading the response's Sean.

 

What application?

 

pulleys

Screw blower outlaw promodified.

Thanks,

sean

 

8mm

The majority of screw blown cars ive seen run 8mm. I believe in classes were there are OD limits you can get closer to the limit with the smaller teeth.
From a mechanical point of view, those tiny top pulleys on the screw would not lend themselves well to run with the big pitch belts which are so stiff and probably dont like being bent so sharply.

 

8MM. 90% of the cars use 8MM. If you use 8MM too, you can bum pullies if needed.

8MM will hold a lot of OD.

 

pulleys

I was thinking the same thing. I have 14mm right now and the bottom is like a wagon wheel but it was given to me. I have some 8mm need to see what I have just think I may only need a top pulley for 116 od.

thanks!

Sean

 

8mm, every supplier has belts and pulleys in stock. Unless you are running top fuel they will hold up.

 

Sean,I think (know) that the belt speed @116 exceeds Gates recom. usage for a 14 mm belt ,IT WILL ONLY LEAVE THE CHORDS.It is within specs with 8 mm but I have no info on 11 mm belt. Maybe J.R.@ RBS or someone else may have this info or can find out.Fact please no guessing

Doug

 

I was running 14mm on my screw blown hemi at 88 over, we turn our engine to 10500 all the time, the belts were not lasting they threw chunks of the back side they started to get stringy on the edges where the chords would start to come out and if they come off or break they wreck everything we blew a hole threw our aluminum belly pan when a belt broke in a burnout once, also a couple of my friends where running the same combo and the belt always walked back real hard on the bottom pulley and tried to tear off the crank trigger, to make it work we had to run a 65mm belt and offset the idler all the way to the front. In an attempt to fix our problems last meeting i switched over to 11mm, best thing i ever did we run the 84mm wide belt and it tracks perfectly belts are lasting better we made 7 runs on one belt and it still looks new after 3 runs my 14mm belts looked trashed, and one of those runs the blower and belt came off and ive got nothing to fix where as the 14mm stuff used to bend and wreck everything soo thumbs up for 11mm

 

With the amount of 11mm stuff i see advertised for sale over there in the U.S, you'd be mad not to use it Every second add seems to have the stuff for sale.The only downside i see, is as far as i know, the selection of belt length is limited! Depending on the o/drive your chasing you may be out of travel with the idler!
Anyone know what's available in 11mm?
8 mm is EVERYWHERE belts are cheap,heaps of lengths,and they seem to last.
Jason.