The Mammoth 2.8 and 3.6 kits offer huge HP gains at any and all boost levels for 302 GT Boss owners. Preliminary testing indicates a KB Mammoth 3.6LC Supercharged 302 GT/Boss 302 motor with cams, headers, x pipe, higher boost and revved to 8000 rpm (note how HP is still climbing at 7500) hits 1000 + HP – without the NOS “crutch.” 1000 + HP tests will be published at later date. Note: 302 GT HP output would be very close to Boss 302 as Boss heads would be the only HP difference.
• Cool air kit included.
* 2.8 vs. 2.9 tests run at same cfm clearly prove 2.8 superior. PC (power consumption or parasitic loss) and DT (discharge temps) were lower with 2.8 and we can prove it.
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• 50 State Legal '11-'14. '15 Pending
• Whisper quiet. No gear growl or clatter.
• Flash Programmer (Kenne Bell calibrated).
• Oil dipstick. No sight glass to discolor or stain.
• 20+ years experience in Twin Screw supercharging.
• INSTANT BOOST. Optimum acceleration at any RPM.
• Integral Intercooler (no exposed pipes, hoses and fittings).
• Proven 6 rib belt system to 15 psi. Optional 8 rib for 8-24 psi.
• Bypass valve air is AFTER intercooler (cooler and denser air).
• Big efficient Kenne Bell “Dual Pass” intercooler and heat exchanger.
• The industry’s most complete and best illustrated Installation Instructions.
• Twin Screw supercharger. Lower power consumption and cooler air charge temps.
• Easy to upgrade supercharger and throttle body for higher HP (Kenne Bell 168mm).
• “Exposed” supercharger runs cooler. Not buried under manifolds, intercooler and covers.
Nothing is more crucial to supercharger efficiency than the inlet system (filter, pipe, meter and throttle body). Starve the supercharger and it develops less boost, heats the air charge and consumes more engine HP to drive. Not good. It is also well known that the air flow and HP potential of any inlet tract is limited by the smallest component - usually the throttle body. To guarantee our kits produce more HP, we offer only proven superior rear inlet kits - the standard industry leading 4.5” Mammoth® with 168mm/2350 cfm throttle body and optional BIGUN Dual 106mm/3800 cfm. These big inlet systems coupled to the largest and/or most efficient 2L, 3L and 4L superchargers is why Kenne Bell is so dominant in Ford supercharging.
On the other hand, the Hi Flo 80 Kit has been around since 2011 and makes a LOT of power over stock - 200HP. The “168mm” is 225HP. Upgrading at a later date is %499 plus a $249 E-tune. Note: The ‘15 up kit is only available with the “168” throttle body.
FUEL SYSTEM - The KB BOOST A PUMP and 72lb injectors made 737RWHP on the automatic and 755RWHP on manual cars. That was max HP. Both will run low 10’s @ 16psi with 100% stock engines and suspension. And no headers, cams, heads, NOS etc. – just a 2.8 kit. The Boss 302 3.6L car tested for MM & FF Magazine made 845RWHP @ 21psi with a 100% stock fuel system and only a competition BOOST A PUMP and 80lb injectors.
Note: Stock fuel lines and rails are adequate, so save your money on expensive dual pump and plumbing upgrades.
IGNITION – Firing fine with stock ignition so far. BOOST A SPARK will probably not be necessary until 25 + psi.
SPARK PLUGS - Do not use BRISK spark plugs with Kenne Bell kits. Use Motorcraft SP 524 (2.0L FOCUS).
INJECTORS - The stock 5.0 uses a new style “short” EV14 injector in lieu of the popular and longer EV6 style. We chose the 47lb EV6 long style injectors on our 9-11 PSI 2.8 kits to make upgrading to a 60, 80, 120, 200lb etc. quick, easy and economical. Upgrading on a Kenne Bell Kit does not require raising fuel rails with spacer kits, injector adaptors or new fuel rails.
Note: Stock fuel rails will-and do- support 1200HP. At least they do on the Kenne Bell and Accufab dyno engines we’ve tested.
CLUTCH - The Centerforce Dual Disk will hold 1000HP yet has the same smooth low pedal pressure and driveability as stock.
TORQUE CONVERTER - PI (Performance Industries) dual clutch converter for high HP applications Prototype worked great.
SUSPENSION - The Eibach lowering kit is just right for height and ride quality. Just add the Nittos and hang on.
TIRES - Nitto NTO5R’s are hard to beat. We also use them on our Hemi’s, Camaros, and Shelby’ street test cars.
8 RIB KIT - See "Accessories." 6 rib good to 15 PSI. Use 8 rib above 15 PSI on 2.8 and 3.6 kits.
CAT BACK EXHAUST - Magnaflow 3” worked best lowering back pressure from 6psi to 0psi at 550RWHP, and + 10HP. Louder than stock but not objectionable.
ATI O.S. DAMPENER - We are working with ATI on 5.0 10,15 and 20% overdrive crank pulleys. Stock is 6.6" vs. 7.24”, 7.55” and 7.88” (+ 3PSI, + 4PSI and + 6PSI). We don’t sell ATI but it is the ONLY O.S. damper we’ve used that works reliably with the 5.0 and the ONLY damper we recommend. When using O.S. dampeners, use the correct 5.0” or 4.5” Kenne Bell 8 rib kit water pump pulley for clearance. Stock is 5.5” (6” with flange) leaving “O” clearance with an 8” lower.
Note: Since the Kenne Bell 2.8 is over 20% larger capacity than a 2.3, it will produce 5-7PSI more boost with the same size pullies (ratio). See what larger 2.8L superchargers do for you – 15PSI with the stock 6.6” dampener and 3.25” SC pulley vs. 8PSI for a 2.3.
CALIBRATION & CUSTOM TUNING - All Kenne Bell kits are calibrated in house except for “tuner kits.” Our kits do not require “custom tuning” unless modified, so save your money. We do not offer any custom tuning for headers, cams, throttle bodies, injectors etc. Check with us for a Kenne Bell Dealer Installer in your area if modifying our kits or adding product(s) that may affect driveability, emissions and/or performance. Also, Jon Lund Racing (610) 500-9545 is a “master tuner” who specializes in mail order calibration (tunes). We highly recommend Jon for any 5.0 custom tuning.
Note: All Kenne Bell Camaro, Hemi and Ford Mammoth Kits (8-26psi) utilize the same huge 1400 HP rated “rear inlet” manifolds fed by equally large 4.5” Ram Air Pipes.