under drive pulley

[neuspeedescort]

my point now is if i balance the pulley after trimming off the serpantine belt section i should see no issues at teh stock hp i have plus maybe 15 for bolt ons i have installed.


NEUMAN

[gtx510]

yes,I am talking about UDP's withnodampener.
If you leave the stock rubber portion on your crank pulley you should be fine.
If that machine (lathe) the metal off evenly the balance of the stock part shouldn't be affected but having it balanced would be added insurance.

This article always seems to come up when people start talking about UDP's.

http://www.atiperformanceproducts.com/products/dampers/damper_dinan.htm

[gtx510]

some more info
http://unorthodoxracing.com/faq_pulleys.html go down to #4 and #5

http://www.billwilner.com/

http://www.cardomain.com/ride/551477 MBSP mod is pretty cool. Same with the Joy Fast pulleys and Jubiride camgears. I like how you could mod the Jubiride gear, but I guess you could do that to most.

http://roadsterjdm.com/ I like the AeroCatch hood latches. ATI crank pulley GB is stalled. Oil pump gears and main caps are nice but expensive.

[projectmx]

i know this is a little old but what if a ruber coating was added to the side of the pulley that connects with the crank?

i am almost done rebuilding my motor and had it all balanced and everything but i'm looking at my crank pulley and it is in terrible condition... doesn't even appear to have any ruber on it and i'm a little confused where the damper part of this pulley is.... can anyone shed more light on this?

[jrally]

Factory pulley with dampening is a bit bulky when looked at it from the back side. It's basically two metal rings one smaller than the other, bonded together by the rubber.

-Jon R.

[FE3-323]

its questionable how deep the rubber goes in the pulley, on the outer ridge there isn't much rubber so it seems. we should really look into this more.

[Shades]

So with using a UDP and a turbo I am gonna blow my oil pump up?... unless I get a billet gear?

Anyone successfully running a UDP and a turbo?

[projectmx]

the billet gear will cost you just a bit under $500 if you only do the innner gear and a few hunder more for both gears cause you have to pay them for the gear(s) / oil pump / modifying the gear(s) for the pump cause each pump is a hair different / shipping

it just seems like there should be a better way to do this cause i'm shooting for around 250 hp maybe a little more and i really need a new pully cause mine is in terrible shape... and i really don't recall seeing these rubber fused plates on the rear of the pulley

jrally... what car can that b3 pulley be ordered from and will we have to worry about this issue with that pulley also?

and what about just adding some ruberized substance to the inside of the udp to dampen the vibrations?

[Shades]

Actually... it cost's around $250-300... click here!

... and trust me there is rubber on the stock pulley.

I don't think putting rubber on the inside of the UDP will help... if you look at the way the stock pulley is designed the vibrations are between the accessory drive of the pulley and the mounting of the crank part... so that means its suppose to stop vibrations between the accessories and the crank.

[therieldeal]

if i really wanted to run an UDP i would use a dry sump system. you can get a dry sump oil pan for the miata

-jon

[projectmx]

where can you get that

and the 250 - 300 is only for the gear go to the webpage and look at the full price it is a lot higher than that

[Shades]

Yeah I already have a pump and work for a machine shop, so I can put it in myself.

[projectmx]

i wasn't sure they would even sell it seperately... i just heard back from a cryo place and they will do the internals for $15.... i might just get the whole thing done cuase it shouldn't be much more...

[mazda terd box]

so is any one runing a UDP witha turbo??????
and is there any way to make a UDp pully work whin your car is hiting the 200 HP mark?

[OUfb2005]

92 BP MX-3 is running 300 hp with a UDP