Did you say that you are running a blower with out a tune? isn't it extremely important to have a tune on a blower car?

 

huh? no the car has been tuned i just need to get time to go pick it up and get my dyno graph and see the numbers it made. hey ss#1320, yeah i know my setup is pushing it. but the car rarely ever gets driven and i don't mash the gas pedal when i do drive it. if i went to the 6.66" right now with my 3.25 pulley would i gain anything?

 

well, if you do have the 6" pulley and you up it to the 6.66", then your impellar speed @ 5700 rpm will increase from 37,883rpm to 42,050rpm.

how much more boost that will give you, i cant say. but i know it will be more (all things being the same).

the impellar speed @ 5700rpm with 6.66 and 2.75 will be 49,695. and the max recommended impellar speed for the v-1 s-trim and the v-2 SQ is 50,000.

 

so basically to stay with my 3.25 pulley and up the crank pulley size would be a waste most likly? the other comment you said makes me not want to go to the 2.95 cause that pushes the blower to its limits and might break it...

 

im sorry, i figured it wrong before. you have a 6" crank pulley and a 3.12sc pulley. this equals 39,461 @ 5700rpm

if you go 6.66 and 3.12 you will have 43,802 impellar rpm at 5700.

it wont be a waste of money if you want more boost. and your a long way from the max impellar speed.

by the way, do you have a V1 S-trim or a V-2? the impellar speeds are a little different for the two.

 

I would say, stroker kit to a 383 or 396, rev it to 6500 rpms if you can. 9.5 compression pistons, up the booste about 4 psi. What heads are you running? You can probably make alot more hp with some better flowing heads, depends on what you got.

 

i have the V2 SQ, would i have to get the car tuned again for the larger cranck pulley?

i'm running ported stock heads.

 

uhh, yeah that may get you a couple more ponies. on that note, does anyone know if a V-2 SQ can even produce 12psi on a 383 or 396??? (i dont know what the average 383/396 flows) i would think that it would have a hard time keeping up with it, at that boost level. may need a more effecient blower like a T-trim.

i think a good question ought to be, how much do you want to spend?

if you dont want to spend a ton of money, im thinking about a economy 355 blower short block from victory racing engines. about $3K. contact nick at victory racing engines.