________________________________________________________________________________________
 
 
• Fits under stock hood*. *Notch on X brace required. No new hood or "Body Lift-Engine Lowering Kit" required.
• Most flexible kit design. Easy to “step up” for racing or “dial down” for street with easy pulley change or Kenne Bell bolt ons.
• Stage 1, Stage 2, Stage 3 Kits for widest power choices (540-801HP / 10-23 psi boost) and ALL the HP the car can handle.
• Largest (Dual 75mm) Throttle Body / Manifold for most HP, lowest parasitic losses and coolest air charge. Competition is limited to 60mm.
• Standard “Mammoth” Dual 75mm Inlet Manifold accepts exclusive Kenne Bell Dual 75mm or stock 60mm.
• Optional Kenne Bell designed Dual 75mm Throttle Body (+26-74HP low restriction meter/filter (48-63HP). Eliminates “mixing and matching” parts from others.
• Headers, cams, porting etc. not necessary. A 4 minute 1/4” size pulley change is 20-36HP depending on kit.
• BIG BORE™ 2.8H (2.0 PR). +56HP over 1.4 PR Twin Screws. Rated 1000HP.
• Billet anodized or polished case vs. painted cast aluminum.
• +125HP (606 vs. 481) over stock Eaton 122. Same 3” pulley and tune.
• +138HP (655 vs. 517) over stock Eaton 122. Same 2.6” pulley and tune.
• + 357HP over stock (801 vs. 444). Stage 3 Kit 2.5” vs. stock Shelby 3”.
• Kenne Bell SCT Flash Tuner and MAF Extender. Kenne Bell calibrated “RACE TUNE” included with each kit.
• Exclusive Kenne Bell Dual BOOST-A-PUMP™ included with all kits. Larger pumps, fuel rails, lines etc. not required.
• Smog Legal. EGR etc. not removed.
• Tested by Muscle Mustangs & Fast Fords and 5.0 Mustang Magazine.
• Quick easy install.
• BUY DIRECT. Eliminate middleman profit, add ons and expensive tuning. Note: Call for Authorized Kenne Bell Installer/Tuners.
____________________________________________________________________________________________
 
_________________________________________________________________________________________
  *BOOST LEVELS 18 PSI AND HIGHER WILL REQUIRE HIGHER OCTANE FUEL. 18-23 PSI FOR COMPETITION USE ONLY.
MAXIMUM RECOMMENDED SUPERCHARGER RPM = 18000. MAXIMUM RECOMMENDED STREET BOOST IS 18 PSI.
3” PULLEY IS MAX FOR STREET AND PUMP GAS (93-94 OCTANE). 3-1/4" IS STANDARD PULLEY.
2-1/2”, 2-3/4”, 2-7/8” ARE COMPETITION ONLY - RACE FUEL PULLEYS.

Note: All boost ratings above based on tests on Kenne Bell '07 Shelby through the stock exhaust system, cams, heads, cats, etc.

• Boost is “peak” data logger reading on our Dynojet Dyno measured after the intercooler. Actual boost will vary depending on 1. pulley size 2. inlet components and 3. engine rpm. See “BOOST RATINGS” below. Stage 2 and Stage 3 Kits increase HP and boost because the larger inlet components reduce air flow restriction. This allows the supercharger to produce more boost with less parasitic loss and cooler charge temps, especially at higher engine rpm/air flow.

• Boost does not “drop off” because the supercharger is too small, but instead because the inlet restricts air flow to the supercharger creating an inlet pressure loss.

BOOST RATINGS
Stage 1 Kits - Peak is approx. 4000 rpm and drops 1-1.5 psi @ 6200 rpm.
Stage 2 Kits - Peak is flat between 4000-6200 rpm.
Stage 3 Kits - Peak is at peak rpm and rises 1.5-3.0 between 4000-6200.

Note: Headers, exhaust, cams and heads can also lower boost.

• Bone stock Eaton 3” pulley 8.5 psi = 441HP.

• HP numbers are SAE on Kenne Bell Dynojet.

• Anyone can make more HP with our kits by revving the engine beyond 6200.

• Keep engine rpm at 6200. Ford DOES NOT recommend increasing the rpm limiter.

• We recommend Dynos that use the AFM1000 ETAS or Horiba AF ratio meters/sensors (oxygen sensors) with a bung - no tailpipe sensors. See “Dyno Testing Variables.”

CAUTION: These kits were designed to produce maximum power and performance. BE CAREFUL. Traction is a problem. The driveshaft needs to be upgraded and a safety plate installed at higher power levels.

    
__________________________________________________________________________________________
The secret to the Kenne Bell kit’s superior performance is the exclusive mammoth sized Dual 75mm Inlet Manifold and matching 75mm Throttle Body. No other kit has it. Supercharger size and efficiency are meaningless if even ONE inlet system component is restrictive or undersized. That’s the best way to kill HP and efficiency (boost, temp and parasitic loss) with ANY positive displacement supercharger i.e. makes it work harder. So, at what HP level does the little stock 60mm throttle body begin starving a supercharged Shelby and killing off HP? One look at our back to back - one change at a time Kenne Bell Shelby dyno tests tells us the answer in approx. 435HP, the average for a STOCK Shelby. So don’t buy a larger throttle body for any Shelby supercharger that only makes 435RWHP @ 6200. At a mere 435HP, the 60mm begins to show it’s limitations. Then at 6300 rpm, the 75mm pulls away by 26HP (658 vs. 632)! And in the 700HP range, the highly restrictive stock 60mm is choking the supercharger off even more by up to 74HP. Note the higher the HP/air flow, the greater the power gains from larger inlet components. For more information on the 60 vs. 75 throttle body/manifold and meter/filter, see “Shelby Dyno Test Summary.” Again, ANY positive displacement supercharger responds especially well to a SERIES of larger inlet components (throttle body, hose, meter, filter). If ONE is restrictive, it chokes off the air flow to ALL of the others, including the supercharger. Anyone who doubts that Kenne Bell 75mm components are a must need only ask Ford engineers why they used a 70mm on the Ford GT Supercar - an engine that makes up to 100HP LESS than a Kenne Bell Shelby.
__________________________________________________________________________________________
STAGE 1, 2, 3 2.8H KITS
(OVERVIEW)

The perfect technological match - Kenne Bell and the fabulous Ford 5.4 4V. Never have there been kits with so much HP potential and flexibility in choice and never has there been a Ford engine like the 5.4 4V. The Shelby 5.4 engineered cars are strong and durable because they were designed specifically for a supercharger. Best of all, the 5.4 4V has tremendous HP potential, given the Kenne Bell supercharger and inlet component upgrades. And it all fits under the stock Shelby hood.

STAGE 1 KIT
For starters, 162HP (606 vs. 444 Eaton) with only the Twin Screw 2.8H Stage 1 Kit with the same size 3” pulley as the Eaton.

STAGE 2 KIT
Replaces the power robbing stock filter/meter with the Kenne Bell Big Oval Filter Meter assembly. Expect 60HP (666 vs. 606) with the 3” pulley. Note: Also includes everything in the Stage 1 Kit.

STAGE 3 KIT
Replaces the stock restrictive 60mm throttle body and inlet tube with the Kenne Bell Dual 75mm Throttle Body and Big Oval Inlet Tube (+26-74HP depending on pulley size). +26HP (692 vs. 666) with the stock 3” pulley size. That’s almost 700HP at 15.5 psi. Then there are the smaller pulleys. 2-7/8” (728HP), 2-3/4” (764HP) and 2-1/2” (801HP) - all the HP the stock engine and drivetrain can handle. This is truly a “max” performance kit. Note: Also includes everything in the Stage 1 & Stage 2 Kits.

Also larger 3-1/4” and 3-1/2” pulleys that lower kit power to as little as 540HP for those who want less HP. Overall HP range is 540-801 (+100-257HP) with NO other engine or fuel system mods except for the Kenne Bell DUAL BOOST-A-PUMP™ and a set of 1 heat range cooler plugs. See “Shelby Dyno Test Summary” for HP and TQ matrix and select the HP that best suits your needs. Think seriously about spending your money on expensive headers (10-15HP), cams (25HP) etc. and labor when the Kenne Bell Kits will give you ALL the extra HP you’ll ever need with a simple low cost pulley/boost upgrade (20-44HP per 1/4” pulley size).

These aren’t kits we just threw together, letting our customers and tuners eventually “figure it all out.” The timing was set at 23°, AF at 11.5 and we made hundreds of accurate SAE back to back Dynojet tests with the various pulleys on the Stage 1-3 kits. Once completed, we organized the test data into a format that helps our customers make intelligent decisions based on fact instead of opinion, heresay or agendas. Most were at 1.03 SAE so for “actual” or “uncorrected” Dynojet numbers, multiply the Kenne Bell HP numbers by .97 if you believe the Society of Automotive Engineers are all wet.

The Kenne Bell Big Oval Meter, Filter and Tube and the Dual 75mm Throttle Body are maximum performance Kenne Bell engineered, tested and calibrated products. Based on the flow bench and dyno data, one would be hard pressed to improve on any of the Kenne Bell inlet pieces.

KIT SELECTION
WHY MORE HP WITH THE SAME BOOST/PULLEY?
We’ve published a lot of information on the Shelby, but the following HP examples will explain why we talk so much about inlet systems. If we’ve learned one thing in our 16 years of Ford Twin Screw kit design, it is KEEP INLET SYSTEM LOSSES TO A MINIMUM. Supercharger size, efficiency and even boost are secondary if the inlet system is undersized and cannot supply sufficient air flow to the supercharger. It acts as a restrictor plate. Like a 2bbl carburetor on a 500” engine. The supercharger must spin faster to make up for the inlet boost loss. It then uses MORE engine HP to make the same boost. Oops! Remember that inlet restrictions LOWER the atmospheric pressure into the supercharger - and the actual boost the engine therefore sees. It’s a lose-lose situation. Example: Here is why the Kenne Bell 75mm manifold, throttle body etc. are so important to the HP a supercharger develops. Compare the Stage 1 Kit (11.5 boost, 3-1/4” pulley, 576HP) to the Stage 3 Kit (11.5 boost, larger 3-1/2” pulley, 625HP). +49HP AT THE SAME 11.5 PSI BOOST AND FUEL OCTANE. But with the SAME 3-1/4” pulley, boost jumps to 13.5 psi and HP is 658 or another 33HP (658 vs. 625) - or 82HP (658 vs. 576) with the same 3-1/4” pulley. Now look at the 2-1/2” pulley (Stage 1 vs. Stage 3). 137HP (801 vs. 664)! That’s how you make more HP with the same boost - and even more HP with the same pulley.

WHICH KIT SHOULD I CHOOSE?
Our kits were designed to leave no one hanging and wishing they could step up the power with some quick simple supercharger bolt ons. See “Shelby Dyno Tests” and above explanation. If your budget allows, go for the larger inlet Stage 2 and preferably the Stage 3 which has a 75mm Throttle Body that eliminates the final inlet restriction - the last part the air sees before it enters the supercharger. Note that any one poor flowing component can limit the flow of the other inlet parts anywhere in the chain. The mammoth sized Kenne Bell Dual 75mm “Mammothfold” flows more air than even the big 75mm throttle body. It blows away the competition. The engine makes more power because the supercharger uses less engine HP with a cooler air discharge temp. In any case, the basic Stage 1 Kit is easily and quickly upgradeable to a Stage 2 or Stage 3 WITHOUT buying a new hood.
___________________________________________________________________________________________
 
__________________________________________________________________________________________
Our flow bench and dyno testing indicated the Kenne Bell 2.8L was capable of inhaling a lot of air - up to 1000HP. So we designed a huge oval shaped inlet system with a Big Oval 130mm Meter and Filter that measures 130mm and flows 1830 cfm. It feeds our own Dual 75mm Throttle Body and matching Inlet Manifold through an equally oversize Inlet Tube.
• Standard with Stage 2, Stage 3 Kits or sold separately.
• Kenne Bell exclusive 130mm Meter / Filter.
• Engineered as a matched pair (internally contoured to meter).
• 1830 cfm @ 28”. 1625 cfm meter only.
• Eliminates restrictive stock canister / filter / meter assembly (1830 cfm vs. 940 cfm stock).
• Works with stock Shelby or Kenne Bell Stage 1, 2, 3 Kits.
• 48-63 RWHP over stock.
• Fits stock or Kenne Bell Big Oval inlet tubes.
• Accepts all Ford MAF sensors (’89 up).
• Developed on Kenne Bell 1000HP Flow Bench and Dynojet.
• Inlcudes filter shroud (not shown).
• See “Shelby Dyno Test Summary” for HP gains.
___________________________________________________________________________________________
 
“84HP GAIN WITH KENNE BELL DUAL 75MM THROTTLE BODY. This is perhaps the largest gain we ever measured from a throttle body swap.”  July ‘07 Muscle Mustangs & Fast Fords Magazine “800HP BOLT ON”
    
  Any one undersized inlet component can starve the supercharger and engine for air (HP). Our testing clearly indicated that the stock 60mm throttle body and manifolds became a major restriction as low as 435HP (stock HP for a Shelby). With our lowest HP Stage 1Kit producing 606HP at a mere 13 psi and the Stage 3 Kit making up to 801HP, we had no choice but to develop our own Dual 75mm Throttle Body to match the HP potential of the BIG BORE™ 2.8 Supercharger. See "Kit Selection" for throttle body HP gains.    
     
  • Supplies whopping 79% more air to supercharger (1880 vs. 1050 stock 60mm).
• 48-68RWHP over restrictive stock 60mm (See “Shelby Dyno Tests”).
• Lowers discharge temp and parasitic loss.
• Matches opening of huge Dual 75mm Kenne Bell Inlet Manifold.
• Kenne Bell “Drive By Wire” Calibration available (Kenne Bell Supercharger only).
• Manifold and Dual 75mm Throttle Body is fed air via the matching Kenne Bell Filter/Meter/Tube Kit.
• For Drive By Wire applications only.
• Polished billet aluminum. 		   
_____________________________________________________________________________________
DO KENNE BELL KITS COST MORE?
Except for our Authorized Kenne Bell Installers, the majority of parts dealers (speed shops, web vendors, dynos and other retailers) typically do not “recommend” Kenne Bell superchargers. The reason is simple. THEY CAN’T BUY, SELL THEM AND MAKE A PROFIT. So they recommend what they CAN sell at a profit. We can’t really blame them, but it’s been our way of doing business since 1968 - and we’re still here, stronger than ever - selling factory direct to our customers.

All Kenne Bell supercharger kits are designed, assembled, calibrated and tuned in house and then sold and serviced (tech support, repairs, warranty etc). factory direct. Selling factory direct to our customers and select Authorized Installers/Dealers eliminates the middleman (web retailer) profit enabling us to offer a better product for less money. And Kenne Bell kits are complete with the industry’s best Installation Instructions. Our kits are not “finished up” or cobbled together by some web vendor, so there are no hidden extras, add ons, custom tuning, agendas etc.

Compare the advantage of buying factory direct, the features, what’s included, and all that “room to grow” and you’ll see that a Kenne Bell kit offers far more but can actually cost less than the competition. And it makes more HP.


STANDARD EQUIPMENT INCLUDED IN KENNE BELL 2.8H SHELBY GT 500 STAGE 3 KIT

$______ “POWER” & “SHOOT OUT” (Street & Competition) Dual Calibration.
Note: Custom Tuning can cost $1000-$1500 in labor alone.

$______ Kenne Bell Factory Direct Tech Support.

$______ MAFIA mass air flow meter extender.

$______ 800+HP fuel system (DUAL BOOST-A-PUMP™). More reliable / less heat than larger pumps.

$______ 627-801HP with ONLY pulley changes.

$______ Pump voltage / fuel delivery / pressure regulated 100% accuracy.

$______ Mammoth dual 75mm inlet manifold (1835 cfm).

$______ Dual 75mm throttle body (1880 cfm) + 74HP.

$______ 130mm meter / 130mm filter (1830 cfm) + 20HP.

$______ Huge Ford GT Supercar inlet tube.

$______ Billet (not cast) high rpm - high boost Twin Screw.

$______ Room to grow. TVS 2.3 Roots Style very limited on HP potential vs. KB 2.8H Twin Screw.

$______ Includes all gaskets.

$______ . . . And it all fits under the stock hood. Saves cost of new hood, fitting and painting.

$______ . . . No engine lowering required.
   
________________________________________________________________________
    
FORD / EATON TVS 2.3 vs KENNE BELL 2.8H KIT COMPARISON
The Kenne Bell 2.8H is the ideal upgrade for the Ford OEM Eaton TVS 2.3L. Engineered by Kenne Bell to be second to none. With the same size 3” pulley, the larger more efficient 2.8H Kit pumps more air, develops more boost and produces more HP and torque (+112HP / 61 FT LBS). And there’s room to grow with the 2.5” pulley - another 9 psi and 114HP (801 vs. 687). Both kits were tested at the same optimum tune (24° and 11.5 AF). To guarantee accuracy, only the kit was compared on our Super Snake test car.

Unquestionably, the new 605HP Ford (Eaton TVS 2.3L) kit is superior to the 500HP ‘07 Shelby (Eaton 2.1L) kit or the 550HP ‘08 KR (Eaton 2.1L) kit - but the Kenne Bell also keeps improving in efficiency. The Eaton TVS 2.3L is available on the lower HP 605HP version of the Shelby “Super Snake.” The Kenne Bell high HP 2.8H Kit, which is also available on the “Super Snake” is rated at 725HP WITH ROOM TO GROW! The TVS is used up at 14.5 psi. Statements about how “efficient” a new supercharger is can be misleading. The real test of a supercharger kits output and potential is to simply compare both with 1. the same size pulleys and 2. with the smallest pulley on a dyno and then datalog the numbers. Below are 3” and 2.5” comparisons.
   
________________________________________________________________________
    
     

Cover Car: March '07 issue 5.0 Mustang Magazine

    Read what Technical Editor, Tom Wilson, has to say about dyno testing and driving the new Kenne Bell 2.8H 800HP Shelby Kit.    
______________________________________________________________
     
     
See more on the Kenne Bell Shelby GT500 at Mustang Life Articles
 

Home | Superchargers | Accessories | FAQ's | Tech Info | Price List | Media | Test Vehicles | Company | Contact Us | Policies

Copyright © 2007 Kenne Bell, Inc. All Rights Reserved