I've been looking into a supercharger for my 97 281. Kenne Bell has a twin screw out, that needs no tapping of the oil pan, but I see a lot of centrifugals out there, and they seem to have a lot of believers.
1. Which one gives more boost approximately, if any?
2. Which is cleaner, longer lasting, etc.?
3. What's a good name to look into?
I'm in Canada, a beaver fur trader , so I need somethin non-steel or iron. Something that can't rust after a winter of salt.

 

roots type blowers like the kenne bell make their peak numbers at lower rpm. i prefer the centrifugal style blowers. accessible technologies aka procharger makes a kit that works great for these trucks. they come standard with a two row intercooler and no need to tap into your oil system with p1sc. wich is self contained. the intercoolers cool off the air going into the engine so you do not have as much problems with detonation. the p1sc kit for your truck has a suggested retail price of 4196.00 and comes witheverything you need to install it. it has an fmu to boost fuel pressure under boost to prevent detonation. we installed one for a customer awhile back and he loved it. he has since sold the truck.

 

So how high will the roots type blower work, and at what rpm could I expect the centrifugal to kick in? I need something between 2000 and 4000, basically low end, and a bit of top end. I'm not racing or anything, it's just I use it to haul a lot, pull stuff, and I also have to pull a lot of vehicles in the winter, as our roads are seldom plowed

 

If your truck will not be used for max perfomance/high RPM type driving you definately want to go with the Kenne Bell. The centrifugals create boost based on engine speed. The higher the RPM the more boost. Down low, little or no boost means little or no increase in perfomance. The Kenne Bell on the other hand, creates boost based on throttle position. Step on the throttle at any RPM and you will have great gains in tourqe. Best for pulling, hauling, and otherwise much more fun to drive. The grins never end with the Kenne Bell.

 

So the kenne bell will only work low end? Or can I get some boost top end for passing 90 year olds on the highway?

 

I would have to recommend the Kenne Bell for on a truck application if your looking to boost the low rpm torque along with the highway passing, high rpm gain. The centrificals on a heavy truckdo work very well at the higher rpms and full throttle, but when you need low end, part throttle torque, it just isent there. In fact, part throttle is very sluggish, I ran a centrifical on my 95 Bronco and wish I would have had a Kenne Bell. With the centrifical on a heavy truck, it's like running two air conditioners at once for the part throttle off roading low end you need. KenneBell will work all the way down to idle and and still boost all the way up to red line. Check out Kenne Bells web site, they give you alot of good insight to the advantages of the roots style vs the centrificals.

 

With my 5-speed, I ran within .01 second of a KB equipped 4.6, with ONLY a K&N. Got it on video too. You can see the KB owners disgusted look... I also question the integrity of their fuel system modes (Boost A Pump) because a fuel pump is designed to run on 12 V, NOT 17. Plus the KB is NOT intercooled.

Go Procharger or Allen. The two BEST systems on the market, and YES I have owned both and now the turbocharger on the same platform. I know what works for these trucks based on experience.

Get a good intercooled kit that make plenty of power out of the box. Oh, and the Allen/Magnacharger ONLY makes more power that a Procharger in the lowest 500-750 RPM. Then they drop off on the top end (About the time you shift), where the Procharger is PULLING HARD through 5600-6000 RPM. NO LAG, just time to hook and leave without smoking the meats...

http://img.photobucket.com/albums/v129/Trixter/apurple000312.jpg

www.trixtersracing.com/project98.htm
www.trixtersracing.com/project00.htm
www.trixtersracing.com/project02.htm

Other projects we have had our hands in...

www.trixtersracing.com/turnkey.htm

 

Crash!, the procharger and other centrifigals are great for what you guys are using them for, 2wd and going pedal to the metal. But put one on a 6000 plus pound 4wd and try using it off road or towing on a boat ramp where your after the increased torque at part throttle, not mashed to the floor, they just take away at the low speed part throttle applications, its the nature of the build.

 

Dude, I have to LUG the engine to get my 4000 lb boat up the ramp to prevent incinerating the tires. That is simply not true, and especially when running 12 PSI on the Procharger.

I have run the Allen (Magnacharger), the Procharger, and our new turbocharger system all on the SAME platform. I KNOW which works the best because I have used these three, and have either installed or raced all the rest that are available for our trucks (Vortech, Whipple, KB, and Powerdyne, but save the Holley).

The Allen makes more power in ONLY the LOWEST 500-750 RPM, then falls off. Just the opposite for the Procharger or turbocharger. So, with the Allen, you would not have the power on the top end where you would end up needing it most, on the highway (Towing). The graphs tell the story.

Here is a good example... PROOF actually... A Procharged 4.6 L (NON-PI) in the FAR lane vs a Lightning 5.4 (PI) on an 1/8 mile track... That is two blocks, and the best way to test off the line acceleration.

http://www.trixtersracing.com/mac.htm

As you can see, the Lightning would never have caught up, and DEFINITELY not in the 1/8 mile.

 

with the procharger, a lot of it has to do with the pulleys. Very easily you can adjust the procharger type superchargers to make more boost early on, and max out early. Or, do little to nothing above idle until you see some RPMs. Its all in where you want it, and how you adjust it.

A little cam doesn't hurt either.

Never say "never", because there is always one guy that is doing it. He just might not live next to you

 

That is why I mentioned the 12 PSI pulley. No matter what blower you choose, you will want to do a gear swap to compensate for 33-35" mudders to get the most out of ANY blower.

Right, never know who is next door. Heh... Or might drive to where you are... LOL!

 

It is interesting to note that Ford is going to the Kenne-Bell style on the new Lightning and the new GT-40 instead of the Eaton type.There is more power in the K-B than the Allen/Eaton...

 

Crash, you have to spin the centrificals up and off idle "part throttle" has more drag on it than running your air conditioner because its not putting out any boost, where the KB is putting out boost off idle.

Quote from Motor Trend "At low RPM and partial throttle the centrifugal blown Cobra feels as if it has less torque than the second hand of a $4 alarm clock."...regarding a 1996 Mustang Cobra 4.6 4v.

I had the same experience with a centrifugal on a HEAVY Bronco. (with 4.56 gears running 33's, yes it has great gears for off the line).

Anyhow, many have had this same experience...so, without getting into a urinating match, for those interested, KenneBell has alot of information regarding the lag experienced with the centrifigals vs the twin screws.

 

Well, I run a Vortech SQ with a Ford Powerstroke Diesel intercooler on my 94 GEN 1 Lightning with 42lb injectors and a host of other mods. With the pulley setup I have, I can nail it from a 35MPH roll and the boost jumps to 7psi and hits just under 14psi at the shift...and I haven't even maxed out this blower and it's only an SQ Trim. Also, with this pulley combo, I do see boost levels of up to 4psi at part and 3/4 throttle, and even that small boost level makes a difference under load. But keep in mind...it's not all about boost levels as much as it is CFM's. The Vortech, ProCharger, and even better, Novi 2000 will push more CFM's than a 2.2L KB...and do it with cooler dishcharge temps.
Some of the advatages the centrifs have is that there is more cooling options for them, and they ride on their own belt instead of the using the same belt as the engine accessories, which can result in accelerated belt wear and excessive slippage. A centrif will give you more belt/pulley options such as a Renegade 8 rib(and even 10 rib) setup which is what I am running now.
Also, with a centrif, you can drive your rig should you ever throw a belt (I actually had to do this once).
In the end, it's not about which is the end all, be all blower on the market. It's more so about the best blower for your application.
The KB produces great HP/TQ down low and the centrifs can be pulley'd to make the same power down low as well. However, if you do that with a centrif, then you better have the fuel system and a good tune to support the boost and power it's going to make at higher RPM's, otherwise you will be back on here talking to us about engine rebuilds.

 

hey crash i copied this from your other post. anyone that question your respons to low end with procharger should read this. i have also installed these on trucks and they work great. the keene bells have great low end but max out qiuckly compared to the centrifugal blowers. i have driven vehicles with the kenne bell and it was not as impressive as the centrifugal i have driven. im not saying that the kenne bell is a bad blower just not my first choice. http://www.procharger.com/TRUCK_SUV/truck_suv.shtml.