for those with a centrifugal blower.....
04-29-2007, 11:08 PM
#1
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Join Date: Jan 2006
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Posts: 4,333
for those with a centrifugal blower.....
hows the bottom end power? from stuff i've been reading, they're a little lacking in low end torque. the one thing that would stop me from considering a centri is that; i need power all over. how bad is it? can someone enlighten me as to how the torque curve is with a centri?
04-29-2007, 11:32 PM
#2
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Join Date: Aug 2006
Location: LA
Posts: 1,201
RE: for those with a centrifugal blower.....
You're right about the bottom end. I have a centri. There is no significant boost until about 3800 rpms and that's exactly why I chose it. It's my daily driver and don't want to race from light to light. I wanted the GT to retain its normal city driving characteristics. I also get great gas mileage. At the track, it's a mute point, since launch rpms exceed the threshold for major boost. The 4.11 gears also help the rpms climb.
You have to watch though with a centri like the Procharger. Although it's rated at 10 lbs, over 6000 rpm it will just keep making more and more boost. During dynotuning it showed 14 lbs at 6400 rpm. If you don't have enough juice to match the boost, you can run lean.
You have to watch though with a centri like the Procharger. Although it's rated at 10 lbs, over 6000 rpm it will just keep making more and more boost. During dynotuning it showed 14 lbs at 6400 rpm. If you don't have enough juice to match the boost, you can run lean.
04-30-2007, 12:17 AM
#3
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Join Date: Jul 2006
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RE: for those with a centrifugal blower.....
ORIGINAL: forensicsteve
You're right about the bottom end. I have a centri. There is no significant boost until about 3800 rpms and that's exactly why I chose it. It's my daily driver and don't want to race from light to light. I wanted the GT to retain its normal city driving characteristics. I also get great gas mileage. At the track, it's a mute point, since launch rpms exceed the threshold for major boost. The 4.11 gears also help the rpms climb.
You have to watch though with a centri like the Procharger. Although it's rated at 10 lbs, over 6000 rpm it will just keep making more and more boost. During dynotuning it showed 14 lbs at 6400 rpm. If you don't have enough juice to match the boost, you can run lean.
You're right about the bottom end. I have a centri. There is no significant boost until about 3800 rpms and that's exactly why I chose it. It's my daily driver and don't want to race from light to light. I wanted the GT to retain its normal city driving characteristics. I also get great gas mileage. At the track, it's a mute point, since launch rpms exceed the threshold for major boost. The 4.11 gears also help the rpms climb.
You have to watch though with a centri like the Procharger. Although it's rated at 10 lbs, over 6000 rpm it will just keep making more and more boost. During dynotuning it showed 14 lbs at 6400 rpm. If you don't have enough juice to match the boost, you can run lean.
04-30-2007, 12:18 AM
#4
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Join Date: Sep 2006
Location: Louisville, KY
Posts: 1,502
RE: for those with a centrifugal blower.....
ORIGINAL: forensicsteve
You're right about the bottom end. I have a centri. There is no significant boost until about 3800 rpms and that's exactly why I chose it. It's my daily driver and don't want to race from light to light. I wanted the GT to retain its normal city driving characteristics. I also get great gas mileage. At the track, it's a mute point, since launch rpms exceed the threshold for major boost. The 4.11 gears also help the rpms climb.
You have to watch though with a centri like the Procharger. Although it's rated at 10 lbs, over 6000 rpm it will just keep making more and more boost. During dynotuning it showed 14 lbs at 6400 rpm. If you don't have enough juice to match the boost, you can run lean.
You're right about the bottom end. I have a centri. There is no significant boost until about 3800 rpms and that's exactly why I chose it. It's my daily driver and don't want to race from light to light. I wanted the GT to retain its normal city driving characteristics. I also get great gas mileage. At the track, it's a mute point, since launch rpms exceed the threshold for major boost. The 4.11 gears also help the rpms climb.
You have to watch though with a centri like the Procharger. Although it's rated at 10 lbs, over 6000 rpm it will just keep making more and more boost. During dynotuning it showed 14 lbs at 6400 rpm. If you don't have enough juice to match the boost, you can run lean.
04-30-2007, 07:07 AM
#5
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Join Date: Aug 2006
Location: LA
Posts: 1,201
RE: for those with a centrifugal blower.....
nothing nothing then boom crazy acceleration
04-30-2007, 09:27 AM
#8
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Join Date: Nov 2003
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Posts: 585
RE: for those with a centrifugal blower.....
ORIGINAL: forensicsteve
Traction
Absolutely. You get beyond a certain rwhp and you're spinning your wheels for street use.
Traction
Absolutely. You get beyond a certain rwhp and you're spinning your wheels for street use.
04-30-2007, 10:09 AM
#9
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Join Date: Aug 2006
Location: LA
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RE: for those with a centrifugal blower.....
baha
That's the $64,000 question. It was running high 11s before the Currie, 4.11 gears, spec clutch, short shift etc etc etc went in. Then as we creeped up with the rpms, we started to have fuel problems (running lean). The boost level above 10 was exceeding the 39 lb injectors and pump that came with the s/c unit...so we went to larger injectors 60 lbs and the GT500 dual pump sys. Then car just wasn't running well...seemed to die in 3rd gear. Right nowit seems strong. We've gone down a tad with the rwhp 458 (mustang dyno) to keep things up frontin one piece. We did a simulated 1/4 on the mustang dyno of 11.37 and had to go to 5th gear to finish the run (wrong rear tires)two saturdays ago. Had a crowd of people watching. Many saidthe sprint runwas accurate within a tenth or two of what they did at the track. I'm not so sure.So with the right diameter slicks (MT ET Street) to finish in 4th and the full manual auto (no more clutch, no more missed gears)...theoretically should be mid to low 11s...but as we all know reality can be quite different from theory. Won't go back to track until new transmission is installed, since the whole transmission in the car right now, doesn't belong to me anymore.
That's the $64,000 question. It was running high 11s before the Currie, 4.11 gears, spec clutch, short shift etc etc etc went in. Then as we creeped up with the rpms, we started to have fuel problems (running lean). The boost level above 10 was exceeding the 39 lb injectors and pump that came with the s/c unit...so we went to larger injectors 60 lbs and the GT500 dual pump sys. Then car just wasn't running well...seemed to die in 3rd gear. Right nowit seems strong. We've gone down a tad with the rwhp 458 (mustang dyno) to keep things up frontin one piece. We did a simulated 1/4 on the mustang dyno of 11.37 and had to go to 5th gear to finish the run (wrong rear tires)two saturdays ago. Had a crowd of people watching. Many saidthe sprint runwas accurate within a tenth or two of what they did at the track. I'm not so sure.So with the right diameter slicks (MT ET Street) to finish in 4th and the full manual auto (no more clutch, no more missed gears)...theoretically should be mid to low 11s...but as we all know reality can be quite different from theory. Won't go back to track until new transmission is installed, since the whole transmission in the car right now, doesn't belong to me anymore.
04-30-2007, 10:32 AM
#10
3rd Gear Member
Join Date: Nov 2003
Location:
Posts: 585
RE: for those with a centrifugal blower.....
ORIGINAL: forensicsteve
baha
That's the $64,000 question. It was running high 11s before the Currie, 4.11 gears, spec clutch, short shift etc etc etc went in. Then as we creeped up with the rpms, we started to have fuel problems (running lean). The boost level above 10 was exceeding the 39 lb injectors and pump that came with the s/c unit...so we went to larger injectors 60 lbs and the GT500 dual pump sys. Then car just wasn't running well...seemed to die in 3rd gear. Right nowit seems strong. We've gone down a tad with the rwhp 458 (mustang dyno) to keep things up frontin one piece. We did a simulated 1/4 on the mustang dyno of 11.37 and had to go to 5th gear to finish the run (wrong rear tires)two saturdays ago. Had a crowd of people watching. Many saidthe sprint runwas accurate within a tenth or two of what they did at the track. I'm not so sure.So with the right diameter slicks (MT ET Street) to finish in 4th and the full manual auto (no more clutch, no more missed gears)...theoretically should be mid to low 11s...but as we all know reality can be quite different from theory. Won't go back to track until new transmission is installed, since the whole transmission in the car right now, doesn't belong to me anymore.
baha
That's the $64,000 question. It was running high 11s before the Currie, 4.11 gears, spec clutch, short shift etc etc etc went in. Then as we creeped up with the rpms, we started to have fuel problems (running lean). The boost level above 10 was exceeding the 39 lb injectors and pump that came with the s/c unit...so we went to larger injectors 60 lbs and the GT500 dual pump sys. Then car just wasn't running well...seemed to die in 3rd gear. Right nowit seems strong. We've gone down a tad with the rwhp 458 (mustang dyno) to keep things up frontin one piece. We did a simulated 1/4 on the mustang dyno of 11.37 and had to go to 5th gear to finish the run (wrong rear tires)two saturdays ago. Had a crowd of people watching. Many saidthe sprint runwas accurate within a tenth or two of what they did at the track. I'm not so sure.So with the right diameter slicks (MT ET Street) to finish in 4th and the full manual auto (no more clutch, no more missed gears)...theoretically should be mid to low 11s...but as we all know reality can be quite different from theory. Won't go back to track until new transmission is installed, since the whole transmission in the car right now, doesn't belong to me anymore.
Good luck