jcfast150

the super charger is great i have one on an 06 the reflash from roush will not change thestock rev limiter or the speed limiter sct flash programer and dyno shop will

07thommi

I am new to the F-150 scene and am looking at purchasing one...so I was curious as to why you believe the Whipple and Saleen superchargers are better than the Rousch superchargers...just looking for more information and opinions...

Thanks,
-mt-

Blown Ford

Well let's start with efficiency. It takes 20 less hp to operate the twin screw at 8psi at wot. At 10psi it takes 23-25hp and .9 lbs less fuel per minute to spin the Whipple twin screw blower at wot. That's 20 more hp going to the wheels and less fuel being burned. This is at 10psi. The gap grows considerably as you increase boost. The Roush or eaton roots blower produces a considerably higher amount of heat than a twin screw blower. All blowers create heat and increase intake air temps but no blower gets hotter than an eaton roots. Heat causes detonation and that burns pistons. For example you can push the stock 5.4 to 500rwhp with a twin screw. You can only push one to 460rwhp with an eaton. The reason of course being that 20+ of those HP are being wasted driving the blower and the rest is in timing you can't add due to heat and detonation. These figures are based on a 12psi setup.

The next difference is in power output. Both blowers will produce stunning torque very low in the rpms. The twin screw however will hit peak boost sooner and doesn't require any wind up to produce full boost. The Eaton requires very little wind up and again is a power monster at lower rpms. It begins to give up a lot sooner though. By mid range the power output of the twin screw exceeds that of the eaton on the same boost and this increase continues to the red line. Think of it this way...there's a reason the lightning guys ditch there blowers for Kenne Bell and Whipple.

So when it comes down to it the reasons I chose the Whipple were efficiency, power, less fuel, and cost. The blowers are very close in price.

07FX2

And blown ford makes more reasons to buy whipple.