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understanding the 1/4

Old 03-14-2006, 11:18 PM
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robs400
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Default understanding the 1/4

I know the basics of the 1/4 and I have taken every vehicle I have owned to the track before (none of them have been fast but fun nonetheles). What is making me ask this is in one of the recent posts Code3GT had a link to a mod stand that was running high 10's in the quarter mile with a N/A motor that made 387hp. I know a lot of it has to do with suspension setup but what I dont understand is why I have never heard of a kenne bell that is capable of putting a fairly stock mod motor around 400rwhp reaching into the 10's? The fastest I have heard of anyone running with a kenne bell is in the 12's and he had cams. I personally called the guy up to see what he had done to the car and he said he had quite a bit more done to it than just the blower. I'm looking into getting the Kenne Bell but I dont know if that is the route I ultimately want to take if I am going to be limited to 12 second runs because we all know sooner or later we want to go faster. Thanks for any input.
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Old 03-14-2006, 11:23 PM
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demon_head
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Default RE: understanding the 1/4

You can have 400hp w/ a blower, but if you don't have an excellent suspension setup, all that power is just gonna make you spin your tires off and result in higher times. That's probably why the guy w/ the Kenne Bell ran 12's and the other guy w/ the N/A setup ran 10's, he probably had the suspension to back it up.
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Old 03-14-2006, 11:30 PM
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code3GT
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Default RE: understanding the 1/4

I have seen KB's make IMPRESSIVE #'s on the dyno, but not at the track. I am not saying they aren't out there, I just haven't seen any KB cars make good #'s at the track. Ken B's Mustang (the one I posted about) was just plain sick. It's all about balance between HP and traction.
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Old 03-14-2006, 11:49 PM
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robs400
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Default RE: understanding the 1/4

I completely agree that a tuned suspension is needed as your car approaches faster times, I just done see how two cars very comparable in power can have nearly a 2 second 1/4 mile difference.
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Old 03-14-2006, 11:51 PM
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code3GT
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Default RE: understanding the 1/4


ORIGINAL: robs400

I completely agree that a tuned suspension is needed as your car approaches faster times, I just done see how two cars very comparable in power can have nearly a 2 second 1/4 mile difference.
Because if KB's were impressive at the track, Pro Racers would be running them instead of Vortechs or ProChargers...Think about it.
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Old 03-14-2006, 11:56 PM
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newb2000GT
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Default RE: understanding the 1/4

It's all about power delivery. It seems to me that instant torque and power might be fun on the street but not all that practical or easy to deliver at the track.
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Old 03-15-2006, 12:06 AM
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sandcracker21
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Default RE: understanding the 1/4

how would it not?

400 hp is 400 hp is it not????

its all in the drivetrain/suspension/skill of driver
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Old 03-15-2006, 12:11 AM
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SpecterGT260
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Default RE: understanding the 1/4


ORIGINAL: sandcracker21

how would it not?

400 hp is 400 hp is it not????

its all in the drivetrain/suspension/skill of driver

it is, but thats peak numbers. With the KB there is quite a bit more power than with the procharger or vortech in the low rpms cuz it has instant boost instead of spooling like a turbo and buliding boost. So you have too much power at the launch and gain time on ur slip when you cant hook.
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Old 03-15-2006, 12:27 AM
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newb2000GT
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Default RE: understanding the 1/4


+1

The centrifugal s/c's steadily gain boost as rpm's increase and tend to do so all the way up to redline. Twin screw types (i.e. KB s/c) have the same amount of boost (for the most part) through the whole rpm range. The boost you have as soon as you hit the gas is the same as the boost you have at redline.

As Spectre said, you need to connect the power to the track in order for that HP to mean anything. The torque and HP curves are different on similarily setup cars and are WAY different on differently setup cars. I don't have the curves for a twin screw vs. centrifugal in front of me, but if you saw them, you would see how much more torque and HP you are trying to hook up off the bat with a twin screw/KB setup. It's not that it can't be done, it just can't be done easily/cheaply.

Just go turbo and be done with it if you are racing. If you're on the street, get a KB and enjoy!

ORIGINAL: SpecterGT260


ORIGINAL: sandcracker21

how would it not?

400 hp is 400 hp is it not????

its all in the drivetrain/suspension/skill of driver

it is, but thats peak numbers. With the KB there is quite a bit more power than with the procharger or vortech in the low rpms cuz it has instant boost instead of spooling like a turbo and buliding boost. So you have too much power at the launch and gain time on ur slip when you cant hook.
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Old 03-15-2006, 11:53 AM
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Default RE: understanding the 1/4

whats the diffrence in a 1000horse power car and a 600 horsepower car? traction. -for what it was worth
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