I'm pretty sure you are talking about endyn and I can tell you right now you will not see 15 psi. The 2 pullies they sell, one is good for 9psi and in conjuction with the other pulley, you are talking about 12psi.

There are certain things you have to take into consideration. Have you put both pullies on yet? Also I am pretty sure that your stock map sensor is good up to 11 psi. I think anything over that you will need a 3 bar map sensor. Also have you bought bigger injectors?

If you have any questions, shoot me an email. I have experience in this field.

Riptide101@hotmail.com

 

does that shop in texas where you had them do the work have a website by chance?

 

www.theoldone.com

I am assuming this is the shop he is talking about.