Ultra S Unorthodox Racing Underdrive Crank Pulley

[Dimitrios]

lol @ twiz.

Sorry for the comment earlier; I just have always had bad experiences dealing with the folks at Pep Boys and Autozone - some would try to find you muffler bearings if you told them something like that existed and you needed it.

 

[DiS]

call UR customer support, they will give you correct part numbers

 

[Hobbit998]

Ok, got the right sized belts, just waiting for the pulley to arrive before i install it... it's been 30k miles already so i have new Autolite Double Platinum spark plugs to go with my pulley. (lol2) Still want to know detailed results on the gain from the pulley tho... can anyone describe the changes more? like can an auto transmission burn out by flooring it at a complete stop? or how much lag is reduced before accelaration...? or does it pull more? etc.... (huh)

 

[Lord_Zath]

It pulls more at low end. This is due to the engine having to work less in a sense. It seems much happier now for me. It will rev much faster (starting it up from a cold start it shoots up to 2k rpm where it used to slowly rise). The engine just feels as if it's got a load off of it.

Good luck w/the install. Lots of fun times.

 

[Installshield 2]

One way to look at these mods that essentially only free up power (such as pulleys or lightened flywheels/axles/wheels etc.) is that the car will behave identically to if you did a massive cut in the overall curb weight...just switching to a 9lb flywheel over the stock one is similar to removing nearly 300lbs from the car for first gear...second gear its like 180lbs or something (there is a calculation, but it is dependant on the gearing...so it is mostly beneficial in lower gears...but you get the point)...

aside from that though, there are excellent increases in throttle response...which makes it much easier for rev matching, and fast shifting overall...

 

[Hobbit998]

Thanks for the info guys, looking forward to the results!

 

[Hobbit998]

OK, finally got it installed. You do notice the difference right away. Most of you guys says you get more power at lower RPMs but I seem to feel more of a difference in the mid range. Overall, power spread throughout the RPM band. Definitely feels like a big load is off of the car... the stock crank pulley is VERY heavy.... Anyways, I'm satasfied with this mod.