Re: A temporary boost can be had by attaching one of these:

I have read that u gain another 5 hp,not sure about torque numbers but what i really need to know is the gain in the upper or lower rpms.

With an under drive pulley you don't gain HP, you loose less.
Driving the secondaries (A/C, Power Steering, Water Pump and Alternator) uses up some HP.
By under driving (running slower) you loose less power.
Happy Plrscheing
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

---

Racecar spelled backwards is Racecar

"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"

"If you wait, all that happens is that you get older"... Mario Andretti

"Being second is to be the first of the ones who lose" ... Ayrton Senna

[tstoaddicts.files.wordpress.com]

I think that was the secret power unit in Oldsmobile of the 50's. Not much for the shop by numbers people when you look at the 0 - 60 time.
[www.topspeed.com]