Looking to get a crank underdrive pulley and I see that there are 10% and 25% retards, does one release more HP than the other? Also, which one would you recommend, (ASP...etc) I've also heard that if you have a A4, (which I do) that you should just get the crank pulley, if so, why is that? Any and all comments and suggestions would be greatly appreiciated. Looks like a great mod for the price. Posted by DaddySS (Member # 848) on :
The ASP 25% for the crank works well, the 15% alternator pulley is not recommended for A4s since at idle it will slow the alternator below charging speed, especially with accessory use.
SLP has a new pulley out that has a larger lip to prevent belts from jumping off, and their stuff is usually pretty good.
There have been many complaints about underdrive pulleys, wobbling, causing knock retard, etc. but I attribute many of them to incorrect installs.
[ 23. March 2004, 04:11 AM: Message edited by: DaddySS ]
Posted by Hawkeye (Member # 88) on :
make sure you have a big wrench - very hard to undue the stock pulley.
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