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.
#16176, "RE: Underdrive Pulley Question." In response to Reply # 0
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.
#16177, "RE: Underdrive Pulley Question." In response to Reply # 0
Poo Poo ca-ca!!!!!
AFX UDP from howell. They know there stuff and sell good products. Accept no substitutes.
USED TO HAVE...Everything you wish you had, and then some...
You are somebody special Tim, you matter! - from the admins (but nobody likes you, because your username is just like that other guy's, and you whine a lot)
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!
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