Thread: Unorthodox Racing Underdrive 2 pulley set

K so I installed these the other day. The 2 pulley set of the crank and water pump. Took about 30 minutes to put them on since I had all the stuff I knew I would need to make it go quickly and no AC/PS.

My impressions of the pulleys are that I love them. You wont really feel a power boost since its through out the whole RPM range. But My revs go up a it quicker now and my throttle response is right where I want it to be. I rev match my car on every downshift also and with Just the 10.5lbs flywheel on my DET it would take a good stab to the gas to match the revs. Now it revs easily with a little gas. I love these pulleys!

Agreed I loved the quicker reving of the motor with these. The best part is with A/C on, it doesn't feel like you loose 20whp!

The blue looks better

OK guys here's a question. I have a 2 pc set in chrome color. I did in fact get them after much ado.

Which one do I put them on? My SE-R is boosted and maybe needs some hp (and a tune) but my NX is due for some bolt-ons and that could be more needed hp for a stock dd w/223k. I'm afraid of getting wasted by my homie w/W10/s4s though. Grudge racing and all @PIR.

Stealthy



I would stick them your DD, you will benefit from faster reving and better gas mileage form them more. Put the problem is, if they do throw off the harmonics of the crank that might finish off the 223k DD...

I always have problems finding the correct belt with the right amount of ribs

goodyear... if you need part numbers let me know

UR underdrive crank pulley + no power steering system + no mechanical water pump + a 8.5 flywheel = Auto X Fun

I've got the 3-peice Unorthodox Racing pullies. My crank pulley seperated, became two peices (LOL) and was toast. The idea and expense of a new Nissan OEM crank pulley did not sit well with me.

Every breakdown is an opportunity to upgrade.

I love them.

Zero issues, a noticable amount of additional pep from the engine bay.

Underdriving the water pump also resolves a reliability issue due to water cavitation at extended high rpms.

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BTW with a 3-piece pulley set, AC works a bit better. That is actually a fact.

AC, Fuel Injector, General....questions... - SR20 Forum

Which, in a hot climate zone is reason enough to get the 3-peice set.

Wasn't their a issue with these pullies with the oil seal leaking awhile back? I noticed Gspec sells a pulley spacer would I need to add this to these ?