Much less of an issue with M6. I would also guess that, of all the driven accessories, the alternator is one of the easier ones to spin, so if you're putting an overdrive pulley on your alternator, it's probably not going to negate that much of the underdrive-pulley gains. Still worth it IMO.

 

I wish someone had some info on how many hp the overdrive alt. pulley takes away. Cause if it takes away 3hp then i cant see spending 200$ for 5 more hp. I wish it just added a solid 10 or 15.

 

so has any one found a lower price on an asp unit?

 

im adding one only because im having a cam put in and the stock one is being removed and a new put on

i wouldnt make a special trip just for a pulley

 

Used ASP unit for $185 shipped..let me know

 

It will also spin your water pump slower-I ran about 5 degrees hotter after installing an UDP...until I installed an electric water pump. Now I'm cool again

 

never thought of that... i just went a head and got a new t-stat and had my fans programed to come on at 185*

 

New Era Performance has them on sale right now for $189.95. See this link: http://www.neweraperformanceparts.co...KV=ASP948500|0

They are an excellent company to do business with!

 

LM Performance also has them for $189.99 with free shipping. See this link: http://www.lmperformance.com/599/1.html

 

25% under on the crank and 15% over on the alt. you not losing anything by putting the alt pully on. def do the underdrive crank. stock pully blows *** anyway throws a belt all the time. i suggest the slp do to the highwall design.