whipple pulley size

[three valve fox]

i have a 2.3l whipple ho kit with gen 2 rotors in it and was just wondering what a 3.0 pulley and a stock lower would get me boost wise any help would be great. thanks

 

[YoungPony]

Any head work or cams? With my 3.125" and stock lower with stock heads and long tubes I was seeing around 11psi. So a 3.0" should be around 14psi on a stock engine.

 

[VectorPat]

I have a 3.125 and see 11-12 on a stock engine and shorty headers

 

[three valve fox]

i have stock heads with hot rod cams 14 is more then i want on a stock long block

 

[YoungPony]

I'd recommend getting a larger pulley then. How much boost do you want to run? Or what horsepower goal are you trying to meet?

 

[jpac811]

This is just weird. My gen 2 with a 3.5 pulley makes 9-10 psi and a 3.375 pulley made 14psi and blew my engine. According to the chart, it shouldnt have made that much. Ive had LTs through out the pulley changes.

 

[BruceH]

This is just weird. My gen 2 with a 3.5 pulley makes 9-10 psi and a 3.375 pulley made 14psi and blew my engine. According to the chart, it shouldnt have made that much. Ive had LTs through out the pulley changes.

Mine always made more than it was supposed to. A 3.375 made 12.6 for me with 9.4:1 pistons. A 3.625 made 10.6 with the stock motor.

 

[three valve fox]

I would like to see 500 or close to it so 11 or 12 i have a 3.0 laying around so just seeing what that pulley would get me

 

[AbdullaGT500]

I would like to see 500 or close to it so 11 or 12 i have a 3.0 laying around so just seeing what that pulley would get me

I would go up to a 3.375 or 3.5 pulley for around 10-11 lbs. That is more than enough to let the motor go!
The 3.0 is rated at 13-14 lbs.

 

[GT E UPP]

Been at 538 rwhp last 4-5 years with 3.25 pulley at 11 psi

 

[striker 5]

Been at 538 rwhp last 4-5 years with 3.25 pulley at 11 psi

^^^^^^^^^^^^^^^^WHAT^^^^^^^^^^^^^^^^

 

[BruceH]

I would like to see 500 or close to it so 11 or 12 i have a 3.0 laying around so just seeing what that pulley would get me

Keep in mind that the whipple supplied injectors and stock maf will both be running out of headroom by 500rwhp so watch that a/f gauge real close.

 

[sportinawoody]

with l/t's h offroad hpipe, blow thru mufflers, comp 127300's bbk throttlebody, port matched plenum for bbk, on stock engine and 3.25 pulley i was at 10.9 lbs. max. just switched to a steeda 10 rib, still at 10.9. higher altitude is going to rob some boost also

 

[GT E UPP]

^^^^^^^^^^^^^^^^WHAT^^^^^^^^^^^^^^^^

Yep, and with stock bottom end at that !!
Currently freshening things up with a Brenspeed B326 (5.3L) Stroker with FRPP CNC Ported Heads etc. etc.
Should make some good numbers ..

 

[VectorPat]

^^^^^^^^^^^^^^^^WHAT^^^^^^^^^^^^^^^^

Dont worry, thats Canadian Horsepower, LOL

 

[striker 5]

oh I get it the numbers are in metric .

 

[GT E UPP]

oh I get it the numbers are in metric .

Dont worry, thats Canadian Horsepower, LOL

, car loves the cool Eskimo air .... LOL