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I have no life
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I have no life
Joined: May 2002
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Originally posted by Sapien:
Back to the optimized-throttle-body-thing. $70 for 2.0hp and 8 lb/ft of torque is not that bad. Our cars really need torque anyways. Our engine has about as much torque as needed for a little car like a zx2, or focus, cougars/contours are too heavy. I think I might hit buckshot up for that.
that's not the gaings for an optimized TB. I'm not sure what the dyno'd gains are and they may be around that, but that's what joe got for his UDP.
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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gian with the TB I gained 2mph in the quarter time remained the same however.
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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Originally posted by ZetecRacing:
you wering the lighter hat will not effect the movement of the sled however if you removed a small amout of weitght from the sled it will effect it  just like the UDP 
Yes, it'll make the same difference that it would make if you added or removed a twelve ounce hat to the top of a half ton sled.
How does lightened rotational mass change the behavior of an engine? It changes the speed at which it revs up with a given torque. Now, when you're accelerating the car, how much of the engine's power is going into changing its own rotational speed? Almost none, since with the whole car to push, the RPMs change only gradually from one second to the next.
Originally posted by ZetecRacing:
and yes the Esslinger pully is lighter and a smaller diameter
guess the quarter mile improvements that Sleeper and I had were a fluke as were my dyno gains too 
One more time for the slower students: you can't claim any difference is caused by the pulley being lighter if at the same time you make the pulley smaller. If you're going to claim one of the two made a difference by itself, then you have to test it by itself.
Hell, even most of the effective change in rotational mass comes from reducing the spin rate of the accessories so they store less angular momentum, not from the change of mass in the pulley, which is only a tiny part of the rotational mass of the crank, tranny, etc. The alternator is almost certainly a bigger flywheel than the stock pulley is. So even the fact that it feels lighter is mostly caused by being smaller diameter, not by the fact that it weighs less.
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for one it's not a 12 ounce differance it a 6lbs differance
the Esslinger pulley is the LIGHTEST UDP avaliabe for the Zetec
and this is all I am gonna say on this since some people seem to think they know how something works at which they don't even have.
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\'er
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CEG\'er
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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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paul, obviously the UDP works. It works because of its design, whether because it's lighter or smaller or both. I don't understand why you're trying to disagree with proven gains.
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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God damn, this is frustrating. I disagreed with the person who said that making it lighter gives gains, not with the idea that it gives any gains overall. How slow do I have to talk in here?
I was also wondering if the figure of 8 ft-lbs of torque is really valid, because it seems improbable, but that's a separate question.
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Originally posted by Paul Kienitz:
God damn, this is frustrating. I disagreed with the person who said that making it lighter gives gains, not with the idea that it gives any gains overall. How slow do I have to talk in here?
I was also wondering if the figure of 8 ft-lbs of torque is really valid, because it seems improbable, but that's a separate question.
do you want a copy of my dyno breakdown posted to make you happy?
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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Hard-core CEG'er
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Originally posted by Paul Kienitz:
God damn, this is frustrating. I disagreed with the person who said that making it lighter gives gains, not with the idea that it gives any gains overall. How slow do I have to talk in here?
I was also wondering if the figure of 8 ft-lbs of torque is really valid, because it seems improbable, but that's a separate question.
Do you also question that lighter wheels allow a car to accelerate quicker?
Its the same priciple.
The less rotational mass of the item, the less energy is being wasted to rotate the item.
BASIC PHYSICS.....find a high school science book and read it.
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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Posts: 17,248
CEG road warrior
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CEG road warrior
Joined: Aug 2001
Posts: 17,248 |
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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