1999Cobra to 2003 Cobra
- Thread starter grizz_man
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stangjunkie
New Member
- Nov 15, 2004
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call kenne bell ask them if the one he got for his 03 is the same part number as the one for your 99...
p.s. ricky shouldn't your HP be higher than that for your mods??
p.s. ricky shouldn't your HP be higher than that for your mods??
jstreet0204
Active Member
Everything will bolt up, it will just require alot of parts to swap also, for example the Kenne bell's of the 03 corbras just replace the supercharger head unit, so you would have to get the lower intake, intercooler, plumbing, plus MANY other parts. It can be done, just probably not very cost effective.
four six
Member
Dan_Soprano
15 Year Member
Kinda +1. It can possibly work, but you are much better off buying a kit from KB, because it will cost you close to the same in the long run.four six said:
I'd personally consider one of the high end Centrifugals, for the simple fact that they're much cheaper, will allow you to reuse your current intake and will make every bit the amount of power than the Kenne Bell will. Not to mention you don't need to tear the top end of your engine apart in order to install one.
But hey, it’s your money.
But hey, it’s your money.
True, but 4.30 gears (which should be mandatory for a 4V anyway) and a quick spooling blower like say a Procharger P-1SC would make that low-end torque difference up in a hurry. Besides, what's that additional “right off idle” torque the Positive Displacement blower provides going to give you anyway, other than unwanted tire smoke? If you're running around with slicks on the back all the time and are given the opportunity to do a proper burn out before every stop light race, then that extra off idle torque is going to mean something. But otherwise, you're gonna just buff ash vault.Rickyll7 said:
Not saying that the little bit of additional grunt down low wouldn't feel nice as a daily driver, but really....how much of that low end torque can you use? Besides, making a little more torque down low isn't going to guarantee you the faster car. Heads up racing has proven that and they're still pretty even as far as that's concerned. You just don't spend near as much doint it with the Centrifugal. I'd say that's a pretty fair trade off for a little bit of low end torque.
hotmustang331
Active Member
You could always pulley the centri to make 25PSI, and then hook up another bypass valve that has a 15PSI spring in it to redirect the extra air back into the blower. That would give a nice kick...but would sacrifice peak HP by turning the blower that fast.
good point to the both of you.
however, when you spin the tires, it is because of your peak torque! a kb and a centri blower will have very similar peak torques. the kb just maintains it at lower rpms.
that said, imagine a kb with "x" peak torque and a centri with the same peak torque, both with approximately the same peak hp. (very possible)
if you assume that the peak torque measured isnt enough to spin the tires on either car,(both exact same cars except blower)
the kb will win. hands down, also assume same driver... etc, etc...
edit:
(it is possible for both cars to have the same peak torque and hp, not that they always do! that would be a completely different story and defeats the purpose of comparing the two for the sake of low end torque."
however, when you spin the tires, it is because of your peak torque! a kb and a centri blower will have very similar peak torques. the kb just maintains it at lower rpms.
that said, imagine a kb with "x" peak torque and a centri with the same peak torque, both with approximately the same peak hp. (very possible)
if you assume that the peak torque measured isnt enough to spin the tires on either car,(both exact same cars except blower)
the kb will win. hands down, also assume same driver... etc, etc...
edit:
(it is possible for both cars to have the same peak torque and hp, not that they always do! that would be a completely different story and defeats the purpose of comparing the two for the sake of low end torque."
hotmustang331
Active Member
^But thats highly unlikely. Reason being that because @ peak torque RPM, the KB car is making FULL boost. Wheras the centri car is NOT making full boost, and thus will not have as much torque.
The motors couldnt be the same, the centri car would have to be an PI motor with low RPM cams or something so there is massive torque being made to even the KB car and then the centri can hold its own with peak power.
The motors couldnt be the same, the centri car would have to be an PI motor with low RPM cams or something so there is massive torque being made to even the KB car and then the centri can hold its own with peak power.
Actually, I think you're confusing the issue a bit. Peak Torque isn't what spins the tires. It’s the power under the curve that breaks the hides loose. Your Peak Torque/Horsepower is the highest figure made across the board, which in most cases comes in between 4,000-6000RPM depending on the set up. Not matter what you drive, peak figures don't come on until later on down the line. As much air as Positive Displacement supercharger moves in a single revolution, even it needs to ramp up some first in order to sufficiently pressurize the motor. Peek boost levels on the other hand come on nearly instantaneously with a PD blower, which is why the Kenne Bell comes on that much under the curve and why your able to feel it down low.Rickyll7 said:
That being said, you could always change the pulley ratio (smaller blower pulley) of the Centrifugal in order to increase maximum blower RPM. A byproduct of this is that airflow levels at all RPM come on that much sooner all the way through until redline (to an extent), at which point the excess could be bled off with some sort of secondary waste gate system (like hotmustang331 stated) in order to keep cylinder pressures manageable. Good idea in theory, but you’ll eventually run the blower out of it’s efficiency range (which again creates unwanted heat), causing horsepower loss (again as previously stated). Not to mention problems with excessive belt slippage.
The same principal holds true of the Positive Displacement blower. The main drawback with them though, is that they’re even more susceptible to heat than the Centrifugals. Run them too far over, or under their peak efficiency level and they succumb to elevated ACT’s. When ACT's go up, timing is pulled and fuel is added to keep things manageable, but cut power making capability in the process. That's why as fat as the torque curve is, horsepower curves tend to mellow out on the top end with Positive Displacement blower in comparison to a Centrifugal when the temperature starts to rise. Each blower is simply just designed to perform differently and move different amounts of air at different RPM.
Regardless what the dyno sheet states, I've seen results of Positive Displacement blown cars get whipped at the track by Centrifugal Cars making much less torque under the curve because either the driver of the Positive Displacement blown car was unable to put the power to the pavement, or the Centrifugal cars horsepower levels continued to climb more aggressively up top and was able to run them down. I've also seen Centrifugal blown cars that made more peak horsepower get beat by Positive Displacement cars because the PD blown car got out first and they weren't able to close the gap between the two before running out of track.
There’s really no definitive winner between the two as far as the horsepower or quarter mile performance goes (regardless of what some may think or try to promote). You’ve really just got to your system based on cost, driving style, ease of installation and “bling” factor.
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