I hate to do this, as it's inmature however, how many top fuel "being the fastest" drag cars around run centrifugals, you must own a "centrifugal".anyways, I agree that excess weight and wide spaced automatics are a far cry from the correct application for a centrifugal blower, as is the case with my procharged 01 f 150, but I've also ridden in a newish ws6 trans am with a centrifugal at 8 psi and an older 5.0 lx mustang with a Paxton that didn't impress me either, so please don't ask me why I bought one for our f 150, but I did and it runs good like it should but the boost just isn't there throughout the rev range. I'm not sure what the deal was with the ws6 t/a but it just didn't go very well, however once the old 5.0 with Paxton got moving it did scream, but it was an automatic with 2.7x gears so you didn't see decent boost until you where going at least 35 mph, but again, wrong application for this style of blower.
I also replied to this prior to seeing his full list of mods, I just seen t56, p1sc @ 10psi, and built engine. again bad ass mach 1, nice kill, and if he has good traction I'd put 50$ that a roots at the same boost level would beat it at the track by at least .25 seconds, sorry I like pd blowers, but I'd love to ride in a mach 1 with any sort of power adder. "are you listening Phophizzat?"
Yes because the fastest ones are using turbo set ups. But there are more centi blowers in the winners circle than there are PD blowers. You also have to look beyond just the mustang.
At the same boost level? The centri will make more power(given it is properly sized, same with the PD blower) and with the right gearing the centri will dominate at the track. You saw the OP's dyno graph. Now at the same horse power level and with good traction you might have an argument.
Last edited by 97desertCobra; 11-04-2009 at 01:44 PM.
I also know that procharger has had kits out for 03 cobras for a long time and they seem to come off just as fast as they were installed, but yes, they're great.
That has alot to do with the fact that the 03 Cobra has 8.5.1 conpression ratio. Really shitty for a centri setup. Plus the Procharger system uses the factory intercooler. A better setup IMO would be to run a FMIC and a 01 Cobra or Mach 1 intake. However, If I had a an 03 Cobra I would be putting on the Procharger before I put on a Whipple or KB. 600 rwtq is cool at 2500rpms when you are looking at a dyno graph but good luck getting that to hook on the street. Not so fun anymore. But in reality, if I had an 03 Cobra I would really be saving for a single turbo.
Centri blowers work well on light cars with moderate boost as they produce good peak power. I am building a notchback that will use a centri. You can make huge power with large centri blowers running a lot of boost but requires, (massive cooling-inercooler), built short block. For the street with a heavy car like the 03 cobra I prefer the twin screw or eaton.
For the street with a heavy car like the 03 cobra I prefer the twin screw or eaton.
Exactly! Most people do prefer the TS or Eaton. I keep thinking of how my peaky '01 cobra powerband was - gag. Not very streetable, constantly shifting for the powerband. On the highway I'll drop it in 6th, very rarely do I ever need to grap 4th.
Exactly! Most people do prefer the TS or Eaton. I keep thinking of how my peaky '01 cobra powerband was - gag. Not very streetable, constantly shifting for the powerband. On the highway I'll drop it in 6th, very rarely do I ever need to grap 4th.
Most people with 03 Cobra's prefer PD blowers. You are just looking at the mustang crowd here, not the larger picture.
Centri blowers work well on light cars with moderate boost as they produce good peak power. I am building a notchback that will use a centri. You can make huge power with large centri blowers running a lot of boost but requires, (massive cooling-inercooler), built short block. For the street with a heavy car like the 03 cobra I prefer the twin screw or eaton.
As oppose to a large PD blower with massive heat soak issues? And I dont see your argument about the built shortblock. If you want to run a big PD blower like a whipple 3.4L and lots of boost you will need a built shortblock also. The centri is more efficient and produces less heat which will allow you to run more timing. I do however agree with the heavier cars benefiting from a PD blower. But I'm not a fan of heavy cars...........
I can see why people wouldn't want one on an '03 Cobra after looking at Procharger's kit. If I had an '03 Cobra it would have a Whipple or KB before a centrifugal blower.
My main point was that you don't need to spin a centrifugal blower as hard as a roots blower to make good power.
look up the RPM numbers for a Scew blower at 16psi and a Centri at 16 psi then get back to us
I was referring to boost levels when I said "spin," not RPM (just to clarify any misunderstandings).
____________________________________ 1997 Cobra
Vortech SC-Trim, Bolt-Ons, Etc.
2004 MACH 1
Vortech SC-Trim, Alcohol, Full Bolt-On, Weight Reduction, Etc. - SOLD
True a built shortblock is required reguardless of blower type once you start running a fair amount of boost, yes wish they would have made the 03 cobra lighter but with 600 + hp you start to forget about the weight!
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oxford white 03 cobra
Last edited by svt4cobra66; 11-04-2009 at 08:51 PM.
Most people with 03 Cobra's prefer PD blowers. You are just looking at the mustang crowd here, not the larger picture.
The larger picture is a good point, however, I believe that centrifugals are more widely used, because of the ease of plumbing them into the factory intake system of damn near any vehicle, if it weren't for the expense and extra work of fabbing and installing a dedicated intake manifold system to allow a pd blower to be installed, you'd see lots more, especially in the heavier car or truck world,
And I'm sure if the 03/04 Cobra came from the factory with a centrifugal instead of the roots they were dealt with, the success of the twin screw outfits and even the upgraded TVS roots would be no where near to the point it is today, although the Lightning wouldn't have been near as popular if it was equipped with such a blower, instead of a pd.
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Screaming yellow 04 Cobra coupe
Mac cai/Accufab inlet and tb
Steggy stage 4 port/2.93 on top, 4# lower
BBK longtubes and matching catted X, Magnaflow cb.
stock injectors, BAP, Mafia.
MM subframe connectors
spec 3+/ Liberty 26 spline input shaft.
heres the difference between Centri and Roots. This is my 04 cobra stock with an x-pipe and the other car is a buddy of mine. 99 cobra with a procharger made 456rwhp. The race from a dig where the camera guy is on the median is the best showing of it.
HAHAA!!! I am the one who was killed on that run. Nice looking and mean sounding Mach 1. Good run man and congrats on your 1st kill. I was going back to Pensacola, I had been in Lafayette working on my 93'lx all weekend.
I figured you had a procharger, I heard the blow off between shifts.
I was going to post up how I was killed by a mach1...but thought you'd post in here..lol.
heres the difference between Centri and Roots. This is my 04 cobra stock with an x-pipe and the other car is a buddy of mine. 99 cobra with a procharger made 456rwhp. The race from a dig where the camera guy is on the median is the best showing of it.
Notice how the roots car was right there several times with about a 70-90 rwpeakhp disadvantage, now up the boost on the roots car to obtain 46x rwhp and um yeah.
HAHAA!!! I am the one who was killed on that run. Nice looking and mean sounding Mach 1. Good run man and congrats on your 1st kill. I was going back to Pensacola, I had been in Lafayette working on my 93'lx all weekend.
I figured you had a procharger, I heard the blow off between shifts.
I was going to post up how I was killed by a mach1...but thought you'd post in here..lol.
you've got a pm my friend...
You are 2-1 with blown Mach 1's, and I think Nick wants a rematch in his.
Time to finish the LX, sucka!
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00 GT, 3/4 Race Cam, Aluminum High Rise w/ Two Fours, Pop Up Pistons, 4.88 Cogs, Racing Transmission
Good kill, with your mods the Cobra must have been making good power to hang with ya from a 65mph roll. A centri 4valve can be a strong runner from rolling speeds. Anyone remember this Mach1?
Granted it's an F1A but it shares the same "peaky powerband".
Good kill, with your mods the Cobra must have been making good power to hang with ya from a 65mph roll. A centri 4valve can be a strong runner from rolling speeds. Anyone remember this Mach1?
Granted it's an F1A but it shares the same "peaky powerband".
Against a cammed, ported eaton with a 200shot YouTube- greek
nice kill!!!!at a little over 400 rwhp i run with 460 rwhp cobra's all day..power to weight..they pull on the hit and then i start to real them in up top and i get right on the front fender by the end of fourth!!!! so at your numbers the cobra must be well over 500 rwhp more like 550+ due to the weight of both cars!!!!
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vortech e trim
paxton air to air intercooler
cobra mass air #39 injectors
ford gt fuel pump,vortech bov
373 gears
steeda tri-axe shifter
magnaflow catted x sss systems catback
brembo drilled and slotted rotors,hawk pads
eibach prokit, tokico shocks and stuts
fr500 wheels 18x9 18x10.5, toyo proxes 245-40 295-35
m&m full length subframe connectors
alluminum driveshaft
01 cobra front bumper
03 cobra mirrors,and sideskirts
420 rwhp 365 rwtq at 8 psi extremely safe tune
Notice how the roots car was right there several times with about a 70-90 rwpeakhp disadvantage, now up the boost on the roots car to obtain 46x rwhp and um yeah.
Were we watching the same video? Because on every clean run the centri car was pulling multiple lengths on the 04 Cobra.
So you are saying to up the boost to what, 13-15psi to make 460rwhp? The same power the centri is making on 8-10psi? 5 psi more to make the same power......i feel I'm going to be running around in circles with you all over again.
Notice how the roots car was right there several times with about a 70-90 rwpeakhp disadvantage, now up the boost on the roots car to obtain 46x rwhp and um yeah.
For being almost stock ... that yellow 03 cobra did incredibly well against the procharged 99 cobra but it's obvious the 99 cobra had more top end pull. I think the 70-90 rwpeakhp disadvantage your speaking of is somewhat offset by the 99 cobra having a passenger in the car.
____________________________________ 01 blk cobra coupe with s281 Saleen conversion. NX Wet Kit, 4.30 gears, pro 5.0 w MGW shift handle, Borla stingers, MRT catted H-pipe, U/D pullies, minor weight reduction.JLT CAI , predator, RWTD custom tune, 305/35-18 Nitto DR, chrome 18x9 ,18x10 saleen wheels, H&R ss springs, MM isolator and cc plates,Hawks brake with slotted and dimpled rotors. Sub frame connectors, KB boost a pump. Aluminum driveshaft. Fidanza aluminum flywheel, Centerforce DF. HID. Tokico D-specs.
F1 + 4v = Short of a high boost turbo set up or the biggest twin screw... I can't think of any other set up on a 4.6 4v motor that can match or surpass a big centri blower.
But there are more centi blowers in the winners circle than there are PD blowers. You also have to look beyond just the mustang.
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01 blk cobra coupe with s281 Saleen conversion. NX Wet Kit, 4.30 gears, pro 5.0 w MGW shift handle, Borla stingers, MRT catted H-pipe, U/D pullies, minor weight reduction.JLT CAI , predator, RWTD custom tune, 305/35-18 Nitto DR, chrome 18x9 ,18x10 saleen wheels, H&R ss springs, MM isolator and cc plates,Hawks brake with slotted and dimpled rotors. Sub frame connectors, KB boost a pump. Aluminum driveshaft. Fidanza aluminum flywheel, Centerforce DF. HID. Tokico D-specs.
Short of a high boost turbo set up or the biggest twin screw... I can't think of any other set up on a 4.6 4v motor that can match or surpass a big centri blower. 
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