Kenne Bell or Pro Charger

i know that the procharger will be a bit more gentle to your engine internals because the power comes in at a higer rpm. but if u have a forged motor i would say a properly set up kb would give you best instant power. they are both equally good though. ide have a tough time deciding too.

Well I think a Procharger with a 3.73 or 4.10 gear would give you everything you want.

I love my procharger but have no experience with a KB so I can't compare.

ive driven a car with a vortech, and it didnt make real power until up in the rpms, granted its not a procharger... but it is a centri. i have an intercooled 9psi kennebell on my ride, and i love it. it makes boost anywhere in the rpm range, i usually see about 7 psi around 1700 rpm and it climbs all the way to 10 psi at about 5900 rpm, its a pretty steady 9 psi between 2000 and 5700 rpm. my car has a stock bottom end, and i run 93 octane with a really safe tune. my a/f is 11.8 with 13 degrees of spark. honestly the vortech car had more rear wheel horsepower, but my car would eat that car alive at the drag strip, and i think mine is way more fun on the street. my car is making over 400 rwtq around 2200 rpm... i would like to see a procharger do that.

i have 4.10's in the car too, so for all you nay-sayers, im telling you its FUN, and as long as im relatively smart about it (not smashing the gas to the floor), it hooks pretty good, on 245 fuzion HRI's.

usaf_branham said:

ive driven a car with a vortech, and it didnt make real power until up in the rpms, granted its not a procharger... but it is a centri. i have an intercooled 9psi kennebell on my ride, and i love it. it makes boost anywhere in the rpm range, i usually see about 7 psi around 1700 rpm and it climbs all the way to 10 psi at about 5900 rpm, its a pretty steady 9 psi between 2000 and 5700 rpm. my car has a stock bottom end, and i run 93 octane with a really safe tune. my a/f is 11.8 with 13 degrees of spark. honestly the vortech car had more rear wheel horsepower, but my car would eat that car alive at the drag strip, and i think mine is way more fun on the street. my car is making over 400 rwtq around 2200 rpm... i would like to see a procharger do that.

i have 4.10's in the car too, so for all you nay-sayers, im telling you its FUN, and as long as im relatively smart about it (not smashing the gas to the floor), it hooks pretty good, on 245 fuzion HRI's.

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This will be the typical answer in comparing those apples and oranges. For the street, the KB supplies much more usable torque. Great post usaf_branham!

I'm guessing the KB for that year does not provide the IC option... I think you may be able to build one yourself if you are that brave. The thing I like about my KB IC SC is that I can change pulleys. I'm at 9psi but can go as high as 14psi when I feel comfortable with my build up. KB is a nice blower. I'm going to drop their chip and eventually tune this myself.

usaf_branham said:

ive driven a car with a vortech, and it didnt make real power until up in the rpms, granted its not a procharger... but it is a centri. i have an intercooled 9psi kennebell on my ride, and i love it. it makes boost anywhere in the rpm range, i usually see about 7 psi around 1700 rpm and it climbs all the way to 10 psi at about 5900 rpm, its a pretty steady 9 psi between 2000 and 5700 rpm. my car has a stock bottom end, and i run 93 octane with a really safe tune. my a/f is 11.8 with 13 degrees of spark. honestly the vortech car had more rear wheel horsepower, but my car would eat that car alive at the drag strip, and i think mine is way more fun on the street. my car is making over 400 rwtq around 2200 rpm... i would like to see a procharger do that.

i have 4.10's in the car too, so for all you nay-sayers, im telling you its FUN, and as long as im relatively smart about it (not smashing the gas to the floor), it hooks pretty good, on 245 fuzion HRI's.

Click to expand...

lets race

Im biased towards centris because i have a vortech but for what its worth im very happy with my setup. Mine pulls like crazy after about 3500

for the same peak power, positive displacement blowers will usually be faster in a 1/4 mile because they increase power over the entire rev range. Centrifugal blowers make power based on rpms - the faster it spins, the more power it makes, to a point. A broader powerband is usually faster in a fixed distance race like 1/8 or 1/4 miles.

That said, an intercooled centrifugal system can be less susceptible to heat soak and ambient temps. Both will suffer more than an all-motor solution, but a large FMIC is better than none, especially for hot-weather driving.

Reallistically, the OP has done a number of mods to move his powerband up in the rev range and has really short gearing. These are things people do when they want to spend more time at high rpms. So the logical choice would be a centrifugal system, to enhance what has already been done.

I don't get the "You loose the street fun reving the motor that high...." Seems to me every Tom, Dick, and Harry can light up their tires from a stoplight, but not everyone has a top-end screamer that pulls harder up top than from idle. Why be like everyone else and their truck?

I always looked at aftermarket KB blowers as a drag race only mod. Sure the cars are fast, but they get so hot just from driving around. Since they are always compressing the air the same amount, they get hot just cruising around. A centrifugal system is not compressing much of anything at 2500 rpm, so it runs far cooler until you get on it. And there is not much of anything like the rush of acceleration of a turbo or centri as it climbs to redline

40oz, I think it is misleading to say that positive-displacement superchargers are "compressing the air the same amount" all the time. This would only be true if the supercharger did not have a bypass valve, which all available kits do.

I also don't agree with your assertion that positive-displacement superchargers make less power up top. This is completely false. My horsepower peak is at 6k rpm and still climbing. In fact, the power delivery of my engine is much more flexible now; when it was naturally aspirated, it ran out of steam past 5500 rpm or so.