96-98 Cobra Kenne Bell Guys
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Old June 26th, 2010, 03:31 PM   #1
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96-98 Cobra Kenne Bell Guys


Attention all owners of 96-98 cobras with kenne bells or other twin screw superchargers, could you please post some pictures, along with information about install, power numbers, or anything else you can think of.
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Old June 26th, 2010, 06:03 PM   #2
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Hmmmm.... I have seen alot of things but this is not one of them. Goes back to the whole intake dilemma for the B heads
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Look at the runners...This is
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Its for a big breathing engine...
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Old June 26th, 2010, 06:28 PM   #3
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could u elaborate a bit?
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Old June 26th, 2010, 06:45 PM   #4
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I have never ever seen a kenne bell adaptor intake to put one on a 96-98 4v. this is because the heads are different. The heads are called B heads. the 99-up 4v heads are called C heads. the B heads have 8 intake runners per head whereas the C heads have 4 intake runners per head. The intake is different, so you cant use a 99-up twin screw intake on the B heads. You're better off buying a Cenrifugal SC and an MMR Intake.
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Old June 26th, 2010, 07:06 PM   #5
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Originally Posted by 97_4V_Sleepa View Post
I have never ever seen a kenne bell adaptor intake to put one on a 96-98 4v. this is because the heads are different. The heads are called B heads. the 99-up 4v heads are called C heads. the B heads have 8 intake runners per head whereas the C heads have 4 intake runners per head. The intake is different, so you cant use a 99-up twin screw intake on the B heads. You're better off buying a Cenrifugal SC and an MMR Intake.
KB makes a kit specifically for the 96-98's. The older kits used a smaller 1.7 blower, and the newer ones are 2.1L. They are an ok blower, but not very efficient due to them not having an intercooler option like the 99-04 kits.

The top option in the twinscrew game would be to basically duplicate an 03 cobra set up with a set of 03-05 heads (or atleast 99/01's), complete eaton swap (minus the eaton), and get an 03-04 specific twin screw ........EXPENSIVE!

The 2.1, with a post blower methonol kit can also some serious power.

For simplicity, its hard to beat a properly set up centri 4v. Dont go too low on the compression (I never suggest less then 9.5:1 on a street driven centri 4.6). My next centri build will be 10:1

Dont wast your time with a p1sc. Jump right to a d1sc, and if you plan on making over 700 eventually, think about getting an f1

If you like vortech, the S trim will make pretty good power, and do a little better then a p1sc when spun hard, but a T trim is a nice starting point for a be head 4v with a built bottom end. Jump to the YSi if you want more then 700.
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Old June 26th, 2010, 07:12 PM   #6
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Originally Posted by mpe331lx View Post
KB makes a kit specifically for the 96-98's. The older kits used a smaller 1.7 blower, and the newer ones are 2.1L. They are an ok blower, but not very efficient due to them not having an intercooler option like the 99-04 kits.

The top option in the twinscrew game would be to basically duplicate an 03 cobra set up with a set of 03-05 heads (or atleast 99/01's), complete eaton swap (minus the eaton), and get an 03-04 specific twin screw ........EXPENSIVE!

The 2.1, with a post blower methonol kit can also some serious power.

For simplicity, its hard to beat a properly set up centri 4v. Dont go too low on the compression (I never suggest less then 9.5:1 on a street driven centri 4.6). My next centri build will be 10:1

Dont wast your time with a p1sc. Jump right to a d1sc, and if you plan on making over 700 eventually, think about getting an f1

If you like vortech, the S trim will make pretty good power, and do a little better then a p1sc when spun hard, but a T trim is a nice starting point for a be head 4v with a built bottom end. Jump to the YSi if you want more then 700.
^

exactly what this guy said is what i want to do with my B head 4v some day when money allows. dont mess with a roots blower on a B head 4v for the reasons MPE331LX has mentioned above.
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Old June 26th, 2010, 07:12 PM   #7
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i knew that kenny bell had a specific kit and yes i know it isnt intercooled which makes me sad. i really want a twin screw. I dont care for centri's too much. I autocross my cobra so a good soild torque band that starts low is what im after. Im considering a new engine anyway so maybe just doing the termi swap. Does Ford racings aluminator accept a kenne bell?
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Last edited by brharris777; June 26th, 2010 at 07:20 PM.
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Old July 20th, 2010, 03:59 PM   #8
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Yes, they have the lates revision of the terminator heads
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Old July 20th, 2010, 05:11 PM   #9
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Originally Posted by brharris777 View Post
i knew that kenny bell had a specific kit and yes i know it isnt intercooled which makes me sad. i really want a twin screw. I dont care for centri's too much. I autocross my cobra so a good soild torque band that starts low is what im after. Im considering a new engine anyway so maybe just doing the termi swap. Does Ford racings aluminator accept a kenne bell?
You might as well just get the 03 Cobra heads and lower intake and get one of the newer Water cooled 2.8 Kenne Bells that are amazing and good for 950hp with a pair of custom cams and of course full bolt ons. And Centris are the worst for autocross and even for the strip or street they just arnt as effecient, they have to be placed right behind the radiator which is the worst for heat, and how they dont have the lower end torque and power band you would get out of a twin screw.
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Old July 20th, 2010, 10:52 PM   #10
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[QUOTE=CammedMysticCobra;3019216] And Centris are the worst for autocross and even for the strip or street they just arnt as effecient, /QUOTE]

Centris more efficient than twin screws
1) Turbo
2)Centri
3)twin-screw
4)roots

Twin screw will definately give you the low end grunt you want for the autocross tho.
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Old July 21st, 2010, 01:39 PM   #11
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god i thought this thread died. Im glad it didnt though. Yeah the twin screw is what im set on. thinking maybe i need to swap for c heads. gonna start shopping around. i think i know what i need to do for now. am i goin to need to tune if i just switch the heads out right now?
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Old July 21st, 2010, 04:05 PM   #12
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i love my twin screw
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Old July 21st, 2010, 04:07 PM   #13
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If you're going boost, keep your b-heads if you can.
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Old July 21st, 2010, 06:15 PM   #14
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any particular reason i would want to keep the b heads as opposed to going with c heads so i can get a mammoth blower?
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Old July 21st, 2010, 08:20 PM   #15
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B heads flow more. little lesss on lower end tq, but they flow like the mississippi up top with boost, and with 4:10's u dont really see a loss down low. heck a friend of mine had 4:56's and that thing screamed!
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Old July 22nd, 2010, 12:00 AM   #16
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well i have 4.10's and i still feel like im lacking bottom end but i really dont have any other power mods. and i guess im confused on if u can port your heads and still run a supercharger at all with all this talk of port sizing and what not. I also dont really want to run the 2.1. i know that you can make good pressure but its alot of stress on the blower to run alot of boost out of a small supercharger. Im thinking my dream of a 700 hp 600-700 tq twin screw are going by the way side.
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Old July 22nd, 2010, 12:05 AM   #17
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aviators also have the same heads as the cobra/mach 1. See if you cant find a wrecked one and buy the motors and then sell the aluminum block etc to make back some of your money
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Old July 22nd, 2010, 12:15 AM   #18
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yeah which cobras and i dont have any idea what heads the mach ones have.
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Old July 22nd, 2010, 04:46 AM   #19
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all 99 up 4V motors, with the exception of the FR500, have C heads. Pre-98 4V's had B heads. there is an ongoing debate on which ones flow better, but for boosted applications, I will always say stay B heads. If you are dead set on the Twin-screw, and have the money to do it, you could consider water methanol injection. I have it on my 98 with a T-trim, due to the fact that I didn't want the added weight of a Intercooler. It works great and it's adjustable so that if I decide to up the boost, I don't have to worry about buying another intercooler, just buying a different set of jets...kinda like nitrous without the risk of blowing the motor. plus it's like I am running 116 octane all of the time in my car, which means I can pull timing and fuel and make her scream... and she loves to scream.
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Old July 22nd, 2010, 01:16 PM   #20
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i dont know much about meth but we cant use any kind of chemical power adder/helper in the SCCA. well if C heads are good enough for terminators then i guess theyre good enough for me. think im just gonna plan on a c head swap. any other info is always appreciated. reps to everyone who helped.
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