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Joined: May 2002
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I have no life
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I have no life
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doesn't exactly add that torque, just frees it up.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15
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Hard-core CEG'er
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Hard-core CEG'er
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Originally posted by Paul Kienitz:
I cannot understand how a udp can add that much torque.
it doesn't add anything it allows the HP and TQ that is there at the crank not to be lost between the crank and the wheels.
2003 Subaru WRX some mods
Even if you don't have the answer, you certainly have to admire the problem.
aka ZetecRacing
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CEG road warrior
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CEG road warrior
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Originally posted by ZetecRacing:
Originally posted by Paul Kienitz:
I cannot understand how a udp can add that much torque.
it doesn't add anything it allows the HP and TQ that is there at the crank not to be lost between the crank and the wheels.
Yes! And I lost some the down low rpm torque with the header. 
Hector
2003 Rally Red Mitsubishi Evolution VIII
257HP/259TQ
2005 Lapis Blue Mazda 6s
RET: 00 Cabernet Red Ford Contour Zetec ATX SUPERCHARGED
160HP/141TQ
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Okay, dammit, put great big post-modern ironic quotation marks around the word "add", you buncha subtext-parsing deconstructionist English major weenies... I still don't see how a UDP can add that much torque.
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Hard-core CEG'er
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It decreases the amount of drag on the crank.
Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST
Pre98 Zetec - Some Mods
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Right, but by 8 foot-pounds? That's just hard to understand. How much damn torque are those accessories eating up? If you're not running the air conditioner, the whole pile of them should only use a few horsepower, I would think, and the alternator should actually impose less torque as the speed goes up...
If the power steering and water pump are imposing that much torque burden at higher revs for power they don't need, then obviously it's way past time that Detroit switched them to electrical power. Has anyone dynoed the torque gain from an electric water pump?
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Joined: May 2002
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I have no life
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I have no life
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It's the slowing down of the accesories AND lightened rotational mass that "add" that power.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15
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Joined: Aug 2001
Posts: 17,248
CEG road warrior
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CEG road warrior
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Originally posted by Paul Kienitz:
Right, but by 8 foot-pounds? That's just hard to understand. How much damn torque are those accessories eating up? If you're not running the air conditioner, the whole pile of them should only use a few horsepower, I would think, and the alternator should actually impose less torque as the speed goes up...
If the power steering and water pump are imposing that much torque burden at higher revs for power they don't need, then obviously it's way past time that Detroit switched them to electrical power. Has anyone dynoed the torque gain from an electric water pump?
I want an electric water pump! 
Hector
2003 Rally Red Mitsubishi Evolution VIII
257HP/259TQ
2005 Lapis Blue Mazda 6s
RET: 00 Cabernet Red Ford Contour Zetec ATX SUPERCHARGED
160HP/141TQ
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Posts: 9,442
Addicted CEG\'er
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Originally posted by LoCoZ2:
Originally posted by Paul Kienitz:
Right, but by 8 foot-pounds? That's just hard to understand. How much damn torque are those accessories eating up? If you're not running the air conditioner, the whole pile of them should only use a few horsepower, I would think, and the alternator should actually impose less torque as the speed goes up...
If the power steering and water pump are imposing that much torque burden at higher revs for power they don't need, then obviously it's way past time that Detroit switched them to electrical power. Has anyone dynoed the torque gain from an electric water pump?
I want an electric water pump!
I just want my car to run right again! 
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Um, how does lightened rotational mass make a difference in power? I mean, when you're in gear and pushing against the road, the effective "rotational mass" on the engine equals the entire mass of your car, multiplied by some radius that you could figure out from your total gear ratio and tire size. So a little pulley is hardly going to be significant.
I still have a hard time seeing where 8 foot pounds come from, unless the two pumps are imposing really gross amounts of wasted drag at high revs, which you would think the car companies would not allow if they're trying to squeeze out better mileage.
If a 25% reduction in pump speeds yields 8 foot-pounds, that would imply that using all-electric pumps could give you like 20 foot pounds! At least at the high end. Wouldn't tuners be all over a mod that yielded that much?
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