stmz28

iTrader: (9)

Has anyone made the change from the 7.65 to 8.65 crank pulley with out switching the blower pulley to see how much more boost it makes? Please list you setup.

Thanks

I8UR4RD

iTrader: (16)

If i see an improvement i will buy. in for results.

stmz28

iTrader: (9)

So no one has used this pulley yet? I know he has sold a lot of them so far.

js2fst

iTrader: (12)

I am2 months on mine I have one

+badss+

iTrader: (12)

So what were your results and what size blower pulley and bracket is being run.

Tirefire

iTrader: (1)

Mine is stuck in Louisiana and will be going on as soon as I get it. I still don't know if it will clear my vet water pump since I had to go to it, when I got my Aster bracket. I will have my 3.90 pulley and probably overspinning my F1a by 8600 rpms. We will see what happens. I was only getting about 13#'s with the 7.65 crank pulley.

Bob@BruteSpeed

iTrader: (16)

Andy, back in the day I was seeing 18 to 20 psi of boost with my 408 with an F-1A and a 3.90 blower pulley at 6800 rpm. This was with the standard ProCharger J Bracket, we had to tighten the snot out of the belt on every run.

You have a problem somewhere, either a problem with the (highly unlikely) blower, inlet restriction, valvetrain problem, boost leak or a faulty bypass valve. I would not overspin the blower by 8600 rpm, that will almost surely end up in a disaster happening. What have you done so far troubleshooting wise? Bob

Firehawk441

iTrader: (41)

NO JUICE said he made 2 lbs. of boost on his P1SC when switching from a 7.65 to an 8.65

Tirefire

iTrader: (1)

Hey bob I did do a boost leak test via the brake booster hose. I sealed the tubbing right where it connects to the head unit. I found out I had leaks at my injectors and bought the katech thicker o-rings to seal that up. Also had a leak above the throttle body and i sealed that. A guy I know said he overspins his vortech by 10% and no issues. So you think spinning it passed its max will damage it?

Bob@BruteSpeed

iTrader: (16)

1,000 past max rpm is somewhat safe but I wouldn't overspin it the rpm you are thinking of doing. For one thing, it would probably create cavitation and make less boost, besides the possibility of catastrophic failure. There is a problem somewhere that needs to be corrected. I have seen older LS6 intake manifolds that are the boost problem, as age destroys plastic. Bob

+badss+

iTrader: (12)

To help you with reference tire fire I made 15.8 lbs with 3.90 pulley something is still leaking would be my guess.

Tirefire

iTrader: (1)

Im still using the smaller hat which is getting me 13#. How much more boost would I see with a truck hat and bigger air filter?

The Alchemist

iTrader: (19)

I'm guessing quite a bit more, in the range of 3-5psi more.

Bob@BruteSpeed

iTrader: (16)

Andy, you could try making one or two runs in a dry clean area without the inlet and filter and see if the increase in boost doesn't shock you. Bob

I8UR4RD

iTrader: (16)

i know KP drilled holes in his inlet hat and put smaller filters along the body off it to add flow into the blower. its an idea. I always look to him for ideas when it comes to making things efficient. the guy had a nasty setup and didnt even have the bells and whistles some of us have.

Z-28

You will probably see about 12% more boost than you have now.

That smaller hat will only flow about 13#. Take it off to see true boost potential.

conan

iTrader: (5)

Here's what I did with the F-body blower hat on my D1. This is my version of KP's idea's that came up in a thread a few years ago.

Procharger supplied filter on the left new filer on the right. http://mycarpics.shutterfly.com/276

K/N # for big filter ^^^ http://www.knfilters.com/search/prod...id=449860&rw=1

Added this little filter for the bypass hole. I had a frost plug in that hole to start. http://mycarpics.shutterfly.com/277

K/N # for the small filter ^^^ http://www.knfilters.com/search/prod...id=449856&rw=1

No Juice

iTrader: (11)

D1SC, not P1

But yes, it gained 2psi, stock motor, stock Procharger filter and bracket. Only change was the crank pulley

stmz28

iTrader: (9)

Has any one put the 8.65 on a f1 series blower?

NemeSS

iTrader: (127)

8.65 pulley may get real close to water pump pulley