Whipple 3V Pulley Poll -

[white_lightning]

As the thread states -I am wondering what pulley guys are using on their stock 3V blocks with Whipples.

Currently I'm using a 3.625" on an HO system, Gen 2, seeing about 8.5 psi on the dyno. I want to go to a 3.5". But want to be safe. I know a lot is based on the tune. My car has been dyno tuned and will return to the dyno if I install the a smaller pulley. (current ratings 387rwhp, 390rwtq mustang dyno)

Also if anyone has a 6 rib 3.5" whipple pulley for sale I'd be interested, I've been keeping my eyes on the classifieds with no luck so far.

 

[zuritausmc]

Youll be fine with a 3.5

 

[BlownAway05]

I've ran a 3.5" since I've had the kit on. Saw just over 10psi when I got it tuned. Stock exhaust, stock long block.

 

[Riptide]

8.5psi and it only makes 387whp out of a gen2 kit?

Is that normal?

 

[69Mach1-409]

I have the 3.375 and she's seeing 8-9 in the summer and 10-11 in the winter. Not sure weather mine is a gen I or II though..

 

[white_lightning]

8.5psi and it only makes 387whp out of a gen2 kit?

Is that normal?

I did request a conservative tune, I don't know my A/F or timing numbers. I have also been told Mustang dyno #'s will be lower vs. dynojet (10%ish). If thats accurate it would be closer to 425whp ish but I havent ever had it on a 2nd dyno to confirm.

 

[69Mach1-409]

Mustang Dyno's are lower (not sure what %) and alot of other things can skew your Dyno numbers. (Tire pressure, Temp, Humidity, Altitude, Dyno tech, etc)

 

[white_lightning]

Mustang Dyno's are lower (not sure what %) and alot of other things can skew your Dyno numbers. (Tire pressure, Temp, Humidity, Altitude, Dyno tech, etc)

Yes maybe I should have mentioned I'm at 3500 feet altitude.

 

[69Mach1-409]

That'll do it! haha

 

[Riptide]

SAE figures should be corrected for altitude IIRC

 

[Charlie Sheen]

3.625/gen2 and seeing 10+psi.

 

[StangPower05]

When i was stock block with my GEN2 Whipple H.O running the 3.500 6 rib pulley i saw the full 10psi that the pulley is supposed to make. That was also with FRPP HotRod Cams and ARH Longtubes. My car put down 480rwhp and 460rwtq on a mustang dyno.. And the tune was super safe with afr's in the 11.5-11.7 range at WOT. You'll be fine with the 3.500 on the stock bottom end for a while, but just know, it will let go sometime..

 

[white_lightning]

3.625/gen2 and seeing 10+psi.

Is all your exhaust stock? I must be seeing less boost based on the bassani x pipe and corsa exhaust and my altitude.

 

[Charlie Sheen]

Is all your exhaust stock? I must be seeing less boost based on the bassani x pipe and corsa exhaust and my altitude.

With coated JBA shorties/stock cats/Bassani X/SLP LMs or stock mufflers I saw a solid 11psi. Now with the same JBAs/ o/r ProChamber/stock mufflers I'm still seeing over 10.

 

[2006gtmike]

Dyno'd On Mustang Dynamometer

Running 4.00" Pulley
6.1 LBS MIN
7.1 LBS AVG
7.7 LBS MAX ...401 RHP 391 RTQ


Now I'm running a 3.875".

Not sure where I'm at now.

Any estimates?

 

[white_lightning]

Dyno'd On Mustang Dynamometer

Running 4.00" Pulley
6.1 LBS MIN
7.1 LBS AVG
7.7 LBS MAX ...401 RHP 391 RTQ


Now I'm running a 3.875".

Not sure where I'm at now.

Any estimates?

My thoughts were approximately 15 rwhp per psi boost

 

[2006gtmike]

You can purchase a 3.750" pulley?

 

[white_lightning]

You can purchase a 3.750" pulley?

Lethal Performance sells em' as per their website!

 

[jmn444]

3.25

I've not heard of people goin boom with the frpp tune and the 3.25.... But I'm still expecting it to happen someday!

 

[GT E UPP]

Whipple-HO Intercooled, 3.25", 11 PSI, 538 RWHP ( Mustang Dyno)
Steeda-Whipple 10 Rib Belt System , Stock Internals and having Fun !!!