Need new UD pulley....
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St. Jude Donor '09
Re: Need new UD pulley.... (Phil97SVT)
Phillip - I went with the ATI, but it's only 10% reduction. NEVRENUF said he damaged his crank snout when his ASP let go. JMHO. ;) :cheers:
Thread Starter
Le Mans Master
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From: Southern Maryland Maryland
Re: Need new UD pulley.... (binksZ06)
Phillip - I went with the ATI, but it's only 10% reduction. NEVRENUF said he damaged his crank snout when his ASP let go. JMHO. ;) :cheers:
Phillip
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Le Mans Master
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From: Southern Maryland Maryland
Re: Need new UD pulley.... (Phil97SVT)
Email from Dave Farmer *************
ATI is the only real choice, imho. I run the full aluminum setup, 10%
underdrive. It is less than 1/2 the weight of OEM, and of course, 10%
underdrive.
GM Racing was involved in helping ATI pick the proper "rubbers" for the
unit, so I know they know what they are doing.
Dave
ATI is the only real choice, imho. I run the full aluminum setup, 10%
underdrive. It is less than 1/2 the weight of OEM, and of course, 10%
underdrive.
GM Racing was involved in helping ATI pick the proper "rubbers" for the
unit, so I know they know what they are doing.
Dave
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Re: Need new UD pulley.... (Phil97SVT)
GM Racing was involved in helping ATI pick the proper "rubbers" for the
unit, so I know they know what they are doing.
So with GM picking the "Rubbers" we should be safe! :lolg: Sorry, couldn't help myself. :D :cheers:
unit, so I know they know what they are doing.
So with GM picking the "Rubbers" we should be safe! :lolg: Sorry, couldn't help myself. :D :cheers:
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St. Jude Donor '09
Re: Need new UD pulley.... (howardl)
Where do you get the ATI full alluminum pulley??? :confused:
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Le Mans Master
Joined: Oct 2001
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From: Southern Maryland Maryland
Re: Need new UD pulley.... (howardl)
Where do you get the ATI full alluminum pulley??? :confused:
Phillip
Melting Slicks
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From: Frisco TX
Re: Need new UD pulley.... (Phil97SVT)
So what you are saying is the ATI has less harmonics? Even though it has less underdrive @ 10%? This will produce the same HP (in effect) as the ASP @ 25% UD?
Over,
Over,
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Le Mans Master
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From: Southern Maryland Maryland
Re: Need new UD pulley.... (bparker)
So what you are saying is the ATI has less harmonics? Even though it has less underdrive @ 10%? This will produce the same HP (in effect) as the ASP @ 25% UD?
Over,
Over,
Phillip
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Le Mans Master
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From: Southern Maryland Maryland
Re: Need new UD pulley.... (bparker)
The thing that had me puzzled was the ATI rep said that the Crank can flex as much as 8 degrees at high RPM from the combustion stroke. The ATI damper is supposed to eliminate this. All the big nascar teams run them.
Phillip
Phillip
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Le Mans Master
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From: Southern Maryland Maryland
Re: Need new UD pulley.... (bparker)
8 degrees is alot man :eek: - I wonder if he meant on a 200K mile motor :jester
Phillip
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Re: Need new UD pulley.... (Phil97SVT)
So what you are saying is the ATI has less harmonics? Even though it has less underdrive @ 10%? This will produce the same HP (in effect) as the ASP @ 25% UD?
Over,
The ATI is a damper as well as an underdrive pulley. The ATI rep said that it dampens the torsional virbations which cause the crank to flex making timing more accurate to cylinder pistion. You really need to talk to someone at ATI, the pulley really seems to be the hot lick but it comes at a cost. Why do all of the ASA teams run this damper vs just an inexpensive ASP. Also ATI has contigency cash for regional and national races. You wont be able to pass tech at a big race with an ASP nor will you be able to win any extra contingency cash. :seeya:
Phillip
Over,
The ATI is a damper as well as an underdrive pulley. The ATI rep said that it dampens the torsional virbations which cause the crank to flex making timing more accurate to cylinder pistion. You really need to talk to someone at ATI, the pulley really seems to be the hot lick but it comes at a cost. Why do all of the ASA teams run this damper vs just an inexpensive ASP. Also ATI has contigency cash for regional and national races. You wont be able to pass tech at a big race with an ASP nor will you be able to win any extra contingency cash. :seeya:
Phillip