I have finally decided that I want to get a twin screw style supercharger for many reasons, and I want to make sure I know what else I should upgrade to have a safe environment for the added boost.
I plan on getting the Kenne Bell system for my 2002 Supercrew Lariat 4x2. I would like to get the Whipple, but I dont think they will ever release it(any new info anyone).

Crash - I know in past threads you have said that the KB system is "unsafe", but after hours of searching and reading, I cant seem to find out why. I read that it actually caused an engine to blow out of the box, but Im not sure why. Please fill me in on this.

As far as the other upgrades, this is what I have seen so far as needed for optimal safe performance:
42# Injectors
255 Fuel Pump
90 mm MAF
Denzo Iridium Plugs
Shift Kit
?Piston Upgrades? - Still unsure what im looking for on this
?Cooling System?

I plan on running 6# boost for a while, but will probably feel the need to up it if I can do so safely(8? 10?).

My questions are:
1. The KB safety issue
2. What else should be upgraded for the system?
3. After mentioned upgrades, what are safe boost levels?
4. Will I be able to use the 2.2L kit?

Thanks guys for all your help.

 

My opinion is that the tune is the most important part of the Kenne Bell setup. These mail order tunes that Kenne Bell provides with your kit will not be adequate for you. My tune originally caused so much detonation that I had to drive like grandma. This was due to over agressive timing curves.


Do yourself a favor, no matter what supercharger kit you buy, get a custom dyno tune. There is no other way to ensure that you will get the most out of your investment and keep from causing serious damage.

The upgraded fuel pump is your next best investment. The boost-a-pump will not keep the fuel pressure up all of the time. You will also have to change out your fuel filter more often than in the past.

The Kenne Bell 36# injectors included in the kit will be fine unless you go over 8 lbs of boost.

Do not use the Kenne Bell kit without cooler plugs! The Denso Iridium IT20's will work good.

No cooling system upgrades are necessary.

I am skipping the piston upgrade and going with a complete short block with stronger forged internals so that I can turn up the boost past 8 PSI. ( I've been shopping at JDM and JLP's sites).
Only your engine knows how much boost it can take.

Your kit should be the 2.2L kit.

 

For the money, what twin screw kits are more powerful?
For the money, what roots kits are more powerful?

 

My concerns with the procharger are:

1. The 12 PSI that people go with isnt safe for my stock engine. If I need 12 psi to really spin the tires, I wont get there due to safety for internal parts. All other blowers claim to be safe at 6 psi.

2. At 8-9 psi, will this be enough on a VERY HEAVY supercrew. I have several hundred pounds in audio equipment, as well as a heavy snuglid.

3. I may be too passive. I have noticed that I rarely "get on it" so to speak, and when I do it is a short burst. I am worried that daily driving I will not get much feel from the Procharger secondary to its delay in boost.

4. Not going to the track. Therefore, the best 1/4 mile time is not my goal.

Lemme know if Im off track on anything.

 

Well you can go here and read about my supercrew procharged rolling on dubs. traction is a major problem. From a stop I can smoke them all the way to 3 gear and from a 35 mph roll on I can still get some smoke. I'll be more than happy to give you a ride.

http://www.got-pressure.com/yabbse/i...;threadid=1673

http://img42.photobucket.com/albums/...rewOnBudnik20/

[IMG][/IMG]

 

here is the 1/4 timeslip you can look at the 1/8 times and mph also. I'm in the left lane. Soon will be posting numbers like the one in the right lane though.

[IMG][/IMG]

 

Nice times for your Supercrew! Do you have the 2 wheel or 4x4 Supercrew? I have the 2001 Supercrew 4x4 (5800 lbs.) with the Kenne Bell. Last year I took the truck to the local 1/8th mile dragway and had some pretty nive runs; 60' was 1.97, 9.13 in the 1/8th mile. This year I will do much better with the elimination of the Boost-A-Pump and installation of the Walbro in-tank fuel pump (a must for consistent fuel pressure), replaced the stock MAF with the 90mm Lightning MAF (I was maxing it out big-time), replaced the KB filter with a larger K&N filter (same dimensions as Dodge Durango part number), opened the fender inlet to the throttle body to 3.5", replaced the throttle body with a MAC 75mm, and had a custom tune (Superchips 6600) 4-position, 4-bank by Mike Troyer. I do have a homemade Water/Alcohol injection system too that keeps the air charge cooler. For such a heavy truck, I love the Kenne Bell; my wife thinks I drive the truck like a sports car, but this truck can out accelerate any ricer I've come across so far. At the track, on the street, towing (4 horse trailer loaded, long trip, I can easily say I'm very happy with the Kenne Bell setup.

 

Couple questions:

1. At what point will these stock motors go BOOM? I have heard somewhere that they can handle only 450 hp. If so, arent both pretty close to that now(above mentioned setups), or over even?

2. I know I have seen something before, but were are the facts/numbers on the effects of intercooling. Are there any comparisons between the charge temps of a KB, Eaton, and ATI running similiar boosts/HP outputs?

Thanks

 

Well here is my last Dyno run
[IMG][/IMG]

Charge temp is not an issue when your running my setup. My chage temps are only a few degrees over ambient. On the roots and twin screws the temp is only gonna be as low as the temp of the liquid in the intercooler so figure at least around 175-180 on a good day.

 

in all fairness to both types of superchargers, in the above comparison, the KB is making more power than the ATI. when you consider that the 4x4 is probably 3 or 400 pounds heavier than the 2WD and they ran comparably the same times. ET's dont count for much though. bruce what was your MPH?

IMO the KB is the better setup out of these two. bruce is running at 10# boost and making more (or at least about the same) amount of power as screwd's ATI. and i would bet its making a ton more Torque in the right places. as bruce said he has more fuel upgrades to do to get the tune more exact, and i think screwd has got his tune nailed down pretty well. if the KB was tuned at its best i suppose it would be more of a monster.

not everything is about making so much power you blow the motor up. the guy who started the thread stated he didnt care about making the most power or racing down the 1/4. its not always about selling an ATI. crash you mentioned that screwd has some more boost laying on the table. to be honest, i'd be scared to run any more. with that D-1, i think the motor or the tranny would go very soon. its true the Procharger will make a lot of power. but there's just so much a stock motor can handle. especially in the upper RPMS where the procharger is really spinning.

 

Your right Bullit I'm scared of blowing a good motor that's why I'm picking up my 5.4 DOHC 4V motor next Friday. I'm shooting for 700hp before the spray and believe me 700hp will not be hard to obtain. Will be running 11's by christmas. With a car seat in the back. So my boy and my wife can ride back with me from the track.

 

What was the feel from the stock setup on those blowers?

At 8-9psi, could you spin the wheels on the procharger?

What about the KB. Did it do much at the stock 6psi, or did you have to go to 10 to really feel it?

Anyone seen times on these with the base level of boost?

 

You will be able to spin the tires you shouldnt worry about that. just worry about how quick your goin through tires

 

Last year I was running a 10# (2.975" dia.) boost pulley (I have a 6# and 8# (3.125" dia.) too) at the track - boost registered 10#. With the changes to my intake, I have to use the 6# (3.375" dia.) which now registers 10# boost. If I used the 10# pulley, I may be looking for a new engine too! Using the AutoTap OBDII software (Ford extended version) my Mass Air Flow (lbs./min.) registers 47.22 which translates into 684.347 CFM (47.22/.069) @ 4635 RPM's, which translates in about 456.23 hp (684.347/1.5). These are only simple calculations, but I certainly know there is now a big difference from last year's setup verses this year's. I can't wait to get back to the dyno.

Thanks for posting your time slip and dyno run Good idea to build another motor; this power is addictive for sure. I figured that I've reached where I want to be power wise for this truck; If I'm going to spend any more money it will be to build a Mustang for dedicated racing and leave the daily drive alone - maybe.

I will post my new dyno numbers some time in June.

 

if your main concern is short burst of speed and spinning the tires. i would get 4.10 gears, a chip and forget the supercharger, seriously. why have one if you are not interested in speed. if towing is a "big" concern, save you time and money and get a f-250 with a diesel or a v-10, if you are towing somthing that needs more motor, then it needs more truck too (brakes, transmission and heavier axles)

as for the intercooler being a factor in off line acceleration, how can a air to air intercooler, lower the temp without air moving thru it? i can understand that a intercooler involving liquid could cool, but how can an air to air cool if the vehicle is not moving?

will my vortech does not seem to light the tires up, my back tires are needing replacement and my fronts look good, so somethng is going on.