Pulley Size/Boost? Cant Find Info!

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Drew1287

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Mar 13, 2003

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Louisiana

Dec 22, 2003

#1

• Dec 22, 2003

• #1

I have a 97 with the vortech setup. I am running the 3.6 inch pulley and have no detonation problems, nor do I feel the car is being pushed hard. What will a 3.33 pulley produce and would that be safe on my car? Let me know!

 

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Drew1287

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Mar 13, 2003

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Louisiana

Dec 22, 2003

#2

• Dec 22, 2003

• #2

nobody?

 

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Drew1287

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Mar 13, 2003

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Louisiana

Dec 22, 2003

#3

• Dec 22, 2003

• #3

With all the smart people here and no replys?

 

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tranzlucent662

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Apr 23, 2003

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Dec 22, 2003

#4

• Dec 22, 2003

• #4

I have no clue about vortech, but a 3 tenth drop in pulley size should give you something around 3-5 lbs of boost I would think. Going from a 3.65 to a 3.1 on an 03 will gain about that and that usually equates to some good numbers.

 

Firemanz

Only you can prevent Forest Fires!

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Dec 13, 2001

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San Antonio, TX

Dec 22, 2003

#5

• Dec 22, 2003

• #5

Hey bro, do a search for CobraKiller and T&J performance. They're some of the leaders with the vortech kit set-ups. I have a 3.6" and I'm putting out about 8lbs, I think a 3.33" would give you about 11-12lbs total depending if you have a powerpipe along with it. I'm rolling with a stock bottom end for now so I've pretty much put off the extra power mods until I get ready to get the engine internals forged.

Also, changing a pulley should require you to get retuned to be on the safe side.....

 

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Drew1287

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Mar 13, 2003

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Dec 22, 2003

#6

• Dec 22, 2003

• #6

Where do you guys reccomend I get this thing dyno tuned?

 

Firemanz

Only you can prevent Forest Fires!

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Dec 22, 2003

#7

• Dec 22, 2003

• #7

I don't know of any in LA, but you could always hit up I-10 West and come to SA.....

 

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Drew1287

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Louisiana

Dec 22, 2003

#8

• Dec 22, 2003

• #8

How much would the dyno time and tune cost? I need to get it done cause I am going up to 30lb injectors for the 11lbs of boost. I dont know if having a chip made would work. I think it would be to general of a tune.

 

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el_kid_1

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Oct 30, 2003

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Puerto Rico

Dec 22, 2003

#9

• Dec 22, 2003

• #9

Drew1287 said:

How much would the dyno time and tune cost? I need to get it done cause I am going up to 30lb injectors for the 11lbs of boost. I dont know if having a chip made would work. I think it would be to general of a tune.

Click to expand...

I would suggest to call Tim at T & J Performance. Although I don't know him nor have spoken to him in the past, from what I have seen in this forum, he is the man to call when tuning/modifying your stang.

 

Sam98

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Mar 15, 2002

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Albuquerque, NM

Dec 22, 2003

#10

• Dec 22, 2003

• #10

Drew1287 said:

With all the smart people here and no replys?

Click to expand...

There are too many factors that affect your boost to answer that question accurately. You can get a pretty good idea by dividing the diameter of the crank pulley by the diameter of your new pulley, dividing that by the quotient of the crank pulley and your current pulley, then multiplying that result by your current boost level.

[(CP/SP2)/(CP/SP1)]*boost

CP=diameter of crank pulley (inches)
SP1=diameter of original pulley (3.6 inches)
SP2=diameter of new pulley (3.33 inches)

That assumes a linear increase in boost with RPM, which isn't really very likely, but it will give you a ball park figure...

 

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Drew1287

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Mar 13, 2003

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Louisiana

Dec 22, 2003

#11

• Dec 22, 2003

• #11

Who does good tuning in the louisiana area?