Modded Mustang Forums banner
1 - 11 of 11 Posts

03_StangGuy

· I Poop Entirely Way Too Much
Joined
·
11,127 Posts
Discussion starter · #1 ·
I just found out this weekedn that I bought my car with under drive pullies, and I was wondering which ones they are. They lookin to be bare aluminum and have the stock crank pulley installed for the vibration dampener. I can get pics lata today if need be. TIA.
 
Discussion starter · #5 ·
I have the crank pulley, the stock pulley is bolted to the under driven crank pulley so i dont loose the harmonic balancer. Ill be able to get pic after work.
 
ah, you have the piggyback style BBK's... which is what I have. A lot of people on here will tell you that your car will explode immediately unless you take them off, but i have been running mine for almost 2 years with ZERO problems
 
ah, you have the piggyback style BBK's... which is what I have. A lot of people on here will tell you that your car will explode immediately unless you take them off, but i have been running mine for almost 2 years with ZERO problems
same here. i've actually heard that non-piggyback style UDP's can lead to premature oil pump gear failure because the rotational mass of the new crank pulley isn't enough to properly dampen the vibrations, leading to premature failure of the oil pump gears. i've had my March pullies for a while without any issues at all...
 
Discussion starter · #10 ·
Ive put almost 15k miles on the car since Ive had the car and the were there when i bought it. I would think the non piggy-back setup would weigh less, can I buy jut the one peice crank pulley?
 
the non-piggy back ones typically do weigh less, that's why some people have problems with the oil pump gears failing. the non-piggy back pullies don't have enough mass to properly dampen crank vibrations. the piggy back ones do because you reuse the stock crank pulley (which is not only a pulley, but also the harmonic damper). if you haven't had any problems with the UDP's that are on there now, i'd just stick with those...
 
1 - 11 of 11 Posts