should i suck it up and change the blower pulley?

[Foxfan88]

i just got some 42 lb injectors with a blow through MAF for blowers. i am going to ditch the FMU and get an inch bigger crank pulley for sure, how much boost do you think i would see after the crank pulley?? i am currently seeing 5-6 psi with my SC trim and a boost pipe with all my mods

or should i just go for the big gun and get a smaller blower pulley also and call it a day?? how much boost would i see then?? i'm just afraid to give up the nice 3 yr warranty i have with this blower.

 

[grey5.0beast]

GO FOR IT!! If the vortech is going to go out, it will go out well after the 3 yrs anyway.

I'd say 7-8 psi with just the crank and add about 2 more for the blower pulley

 

[blown1989saleen]

have you considered you may be over spinning the blower with that pulley combo

 

[RsStanG1987]

I always thought a smaller pulley was the way to go

 

[Chuckman]

I always thought a smaller pulley was the way to go

for the head unit, yes, but a larger crank pulley will do the same. the bigger the ratio of crank to blower pulleys (say 1.6" crank to 1" blower for an example) the more rpms the blower will spin=more psi.

 

[Foxfan88]

you want a bigger pulley for the crank, it will move more belt per revolution, then on the blower itself you want a smaller pulley, will take less belt to turn the pulley, so it will spin faster

the SC trim upgrade kit on superchargers online only upgrade the crank pulley from 6" to 6.87, the same blower pulley size is kept but they give you a new one anyways since they make it 8 rib over 6. its straight from vortech and it claims it makes the SC trim push 9 psi, seems like alot, i duno if it will do that or sure or not.

 

[Blown83GT]

Change both. Since your'e going to the 8 rib setup.

 

[Foxfan88]

if i get the blower pulley i will get the 8 rib belt

 

[cenok is family]

do it and don't look back

 

[jake2582]

the blower should have a max rpm for the blower itself*
engine rpmXoverdrive=blower speed