kenewagner
Registered User
Anyone know off hand what the stock diameter of the the pully on a stock M112? Or what sizes are available? Thanks
Ken
Ken
Check some of the Cobra & Lightning forums. You'll probably get your answer there, faster than you will here.kenewagner said:Anyone know off hand what the stock diameter of the the pully on a stock M112? Or what sizes are available? Ken
cougarsc said:The Stock 03 Cobra is around 3.7". You can get them all the way down to 2.75. Their quick change setups are about $80 with the hub.
007_SuperCoupe said:What you want to find first Ken is a pulley that is as close to the stock M90 pulley as you can. Simply measure that diameter, then start your hunt for something as close to that as you can find. That'll get you close to the stock drive ratio of the supercharger. What may be an overdrive pulley for them, may be exactly what you need to keep that supercharger spinning at 12,000 rpm at 6,000 rpm engine speed. Anything smaller than our stock pulley and you'll be OD the supercharger. I can get with you offline on this if you'd like. Just give me a call.
bird963 said:There are different stock size pullies for M112 usage:
Ford Lightning - 2.93", Cobra - 3.55", Harley Davidson - 3.16"
You can also buy them in 2.7, 2.8, 2.9, 3.0, 3.1, 3.2 and 3.3" diameters.
Bird963
Yes like over driving 22%, BUT at a lower output temp. because the M112 doesn't have to work as hard or spin as fast, to make the same boost as the M90.kenewagner said:The M112 moves 22% more air so if I use a stock sized pully it will be like I am overdriving a M90 22%. Ken
68COUGAR said:If you get a pulley that is 140% the size of the M90 pulley, the M112 will flow the same amount of air as an M90 at the same speed.
68COUGAR
68COUGAR said:If you get a pulley that is 140% the size of the M90 pulley, the M112 will flow the same amount of air as an M90 at the same speed.
68COUGAR
112/90 = 1.4x100 = 140%
I don't follow your math. Can you explain it? I would think 124%