Thats What I Was Thinkin Low 14's Hopefully. The Reason Im Asking Is Cuz One Of Our Guys At Work Wants To Race Him Again. They Raced Once Already When The Harley Truck Was Stock, And The Other Guy Has An 04 F250 Diesel 6.0 Crew Cab 2wd, With A Superchips , Cia, And Magnaflow Exhaust, And He Ran 14.30 Sumthin At The Track, And The Last Time They Raced The Harley Truck Won. Like 2 Times In A Row From A 4o Roll And From A Dead Stop. Now The Guy In The Deisel Has Replaced The Supchips Whith An Edge Juice Box And Wanst To Run Agin, So Thats When My Boss Put The Programmer And The Bigger Boost Pulley On, So I Guess Well See, Hehe

 

No, the HD's run a larger upper pulley as well. A 3.10 I believe. I could be wrong on that, don't feel like searching to confirm it right now.

 

I believe your correct with 3.10, or at least very close to it.

 

Huh.That's news to me.

 

my Harley Davidson F-150 (which is currently for sale) has a 4# pulley only (with Predator) and ran 8.62 in the eighth... that would be a low 13 quarter. also got a buddy that can back that up as he has ran low 13's with a similar setup.

 

so explain to the chevy boy again, what doess he have stock for the upper pulley on the hd? and since he went the next step up, as far as power goes, what pulley would that be?

 

Stock upper - 3.10
Stock lower - 7.5


The next step up would either be a 2.93 upper or an 8 inch lower (2lbs). Most people tho when they do a lower go for a 8.5 inch (4lbs) lower.

 

stock Harleys have a 3.25" upper pulley and 7.4" lower pulley. stock Lightnings have a 2.93" upper pulley and a 7.4" lower pulley.

 

Thanks for the correction.

 

no problem!