Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - SR Owners... More HP Easy Mod... Catch Can Setup

akara · 04-09-2013, 08:19 PM

Quote:

Originally Posted by Kingtal0n

Naturally Aspirated
Dyno Test Results
Without Vacuum Pump With Vacuum Pump
762ft [email protected] 772ft [email protected]
[email protected] [email protected] 6800

http://www.strokerengine.com/vacuumpump.html

this is actually a common modification among the big horsepower V8 crowd. its percentage based, the more displacement, the more boost, the more payback.
And you have to actually be making power, to notice a difference in power.

Thanks a bunch! I totally agree with you like you said that its percentage based, the more displacement, the more boost, the more payback.
In your example the 25hp gain equates to about 2.8%, in line with what I was thinking.
I will be curious to see the difference when I am on the dyno as I am only making around 300WHP(guesstimate) on a 2L