10 rib question?

[nstycpe93]

i am running a 335 stroker with t trim. with the cogs it was pullied to 18lbs. of course, the belts dont really last to long and i am tired of replacing them.

i recently purchased a 10 rib kit. it has a 7 inch crank and a 2.80 blower pulley. i also purchased a 2.50 and 2.75 from ian.

now i am wondering what kind of boost i will see with the 7/2.75 pulleys.

for racing i will probably go back to cogs but street use will be the 10 rib most of the time.

i know i should get an 8 inch crank pulley but at the present time i just cant afford it yet. and i am not sure it will clear my cobra water pump pulley.

thanks for any help.

[BLOWNBY]

What pullies did you have before and what kind of boost?

[nstycpe93]

i was running a 74/32 for the 18lbs boost. they are from asp racing 30mm belts.

i have a 74/28 on there right now. but they are coming off as the motor is going back in the car this weekend. had to replace the oil pump cause it broke off the motor.
thank heaven for synthetic oil..they saved the bearings.

[5150 LX]

According to the spreadsheet in our General Tech section, your Cog pulley set-up resulted in an impellar speed of 46,273 RPM's, the 7" and 2.80" combo will result in 51,750 RPM's both were figured at a conservative 6k RPM engine speed.

So with that said, I doubt that you'll lose anything by swapping considering that you don't experience a shitload of belt slip.

BTW- here's the link to the spreadsheet that calc's the impellar speed....

http://www.superchargerhelp.com/atta...tachmentid=686

[mainestreetking]

from what i see i wouldn't waste time with a 7 inch pulley....run 8 inch with larger blower pulley.......less b.s. with belt slip

[nstycpe93]

to late for me right now, i bought the 7 inch already. i could see where the 8 inch crank could hit on my cobra water pump pulley. i am not running a electric one.
what is everyone elses experience with the 8 inch crank clearing the water pump.

[nstycpe93]

to late for me right now, i bought the 7 inch already. i could see where the 8 inch crank could hit on my cobra water pump pulley. i am not running a electric one.
what is everyone elses experience with the 8 inch crank clearing the water pump.

[regattacoupe]

I'll have info on the 8" 10 rib, and waterpump clearance for a stock wp pulley shortly. I don't think it would be a problem if Vortech did thier homework eh?