I have March. I really didn't see a difference. I don't really see how one brand would differ from another besides looks. I would check the classifieds since there are always some for sale cheap.
I would try to get aluminum ASP's but I don't think it really matters. I bought some March pulleys from Joe (vibrantredgt) and I think he dyno'd them to like 8rwhp and similar torque. Try to find something cheap in the classifieds. Used pulleys are a great bang for the buck.
ASP is by far the best, they use great quality aluminum, and are some of the lightest weight you can buy for the price... don't save on money and go w/ steel... no performance difference really... ASPs also have a great warranty and come in different colors... March are also ok, but way overpriced for what you get...
-you can get a good set of new ASPs for around $85-$95 + shipping... just look around...
Basically I would suggest you just get aluminum udps...part of the point is to lower the rotational mass, so don't settle for steel pulleys, go as light as possible, and get the aluminum pulleys!!!
Aluminum is better cuz of less rotating mass but the degree is marginal. You can get a REALLY nice set of ASP pulleys for a decent price or get some Mac or similar steel pulleys for considerably cheaper. Both will do the same thing to nearly the same degree. I dont think any brand is better than the other either. Basically, unless you really want aluminum, just look for the best price. Thats my opinion.
no. there are 4 bolts in the crank pulley, and the water pump pulley, the hardest one is the alternator pulley, just remove the alternator and take it to autozone and they will swap it for free
I bought my first set from a "racenet" and they went bankrupt and ran away w/ my money... trust me, don't take the chance... just order them directly from www.aspracing.com they are aboug $100, but they are directly from them... no seconds hand crap...
-and actually, the reason of aluminum is parasitic loss... not the same as rotating mass (was a physics major )