Hello,
What brands of underdrive pulleys are people using, what are their thoughts as far as HP and generalized speed gains.. and what are people's thoughts on this auction; http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=1808441455&r=0&t=0
Has anyone ever used a "Top Fuel" product? How reputable do you think they are? Vs. the A/FX what's better? Sorry for all the questions. Thanks in advance.

Gary

AFX manufacturing make swhat most poeple say is thew best one. 160 dollars for the pully and belts. soem have said 10-11hp to the wheels. that pne on ebay might be ok. i dont know the name, but the afx is probably better. click the howell automotic banner at the top of the page they have them.




weapon-r intake
greddy headers
apex-i n1 catback
afx udp
energy suspension
motor mounts
cf altezza tail lights
bored t/b
magnecore wires
hotter plugs

Poo Poo ca-ca!!!!!

AFX UDP from howell. They know there stuff and sell good products. Accept no substitutes.

That looks like an AFX clone.



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current status - No 3rd Gear synchro


http://hometown.aol.com/ohshootuhh/
www.Fast420A.com

That thing is made out of T-6061 Forged and Hardened Billet Aluminum can't be half bad....

>That thing is made out of T-6061 Forged and Hardened Billet
>Aluminum can't be half bad....

Ours is made from T6061 with 651 heat treat (harding), with a 304 stainless steel center bushing.

>and what are people's thoughts on this auction;
>http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=1808441455&r=0&t=0
>Has anyone ever used a "Top Fuel" product? How reputable do
>you think they are? Vs. the A/FX what's better? Sorry for
>all the questions. Thanks in advance.
>


Well it looks like a nice clone of our AFX pully, but it has some important differences.

1) The most obvious on that I see is the lack of a steel center bushing. Our AFX pully has a stainless steel center bushing for a very important reason. Steel and Aluminum react chemically with each other in a process called galling. This reaction eats the material in the crank over time. We place a stainless steel bushing in the center of the crank to prevent crankshaft galling. This knock off has no bushing.

2)Another problem the lack of a bushing will cause is deformation. Keep in mind your pulley is press fit. When you press it on, it will roll tiny bits of aluminum up in it, as the aluminum is much harder than the steel. The stainless steel bushing in the AFX prevents this. This means this knock off is basically a disposable pulley, you take it off you get another one. The AFX is reusable, and should the bushing ever become damaged we will replace the bushing.

3) The performance gains are not in line with an AFX, meaning it is most likely larger in diameter.

But imitation is the greatest form of flatery, and I will worry when they make one as good as ours, and they haven't yet. We are also proud to say made in the good ol US of A!

ya, go with afx, i did, and no problems. see my site for a udp install writeup

go with AFX!