What do we think about the UR crank pulley? I'm replacig mine and I'm not sure whether this would be any good...because I have one readily availabel to me...

What do we think about this?

 

Well this has been discussed a thousand times. 71DSP, a well respected Prelude owner says it excessively wore his bearings and water pump. Due to the pulley not having a harmonic dampener in it. Many people run these things though and never have anything bad to say about it.

I feel that the effects of this are long term and I really wouldn't worry about it if you are trying to make your Lude into more of a racecar and you can check your motor condition every so often. There are nice gains to be had with the pulley.

 

Yes I've actually met Billy...but we weren't talking about Crank Puleys at the time...

The only thing I can say about Billy's is that it was not an actual UR pulley, but a copy of it. Who knows whether it was properly made? I'll go read up on the article just for kicks.

 

Yeah I remember that now. It wasnt even a REAL UR pulley! I'd just use the pulley. You really shouldn't have any problems and the gains are very nice.

 

Ask Dan Yi (DYI01) what he thinks about his UR crank pulley. He's rebuilding his 3 year old motor now thanks to spun crank bearings. I believe he had the UR pulley on his motor for about 35,000mi before it went...

Andrew

 

He said it wasnt't due to the pulley last time I heard. He just isn't using it in his new rebuilt motor to "be safe".

 

Yeah Dan Yi said it was the bearing 4 on the other side, so it couldn't have been the Crank Pulley.

I think it was the SS that screwed everything up

 

i recently read an article in i think super street or scc that agrees with my opinion. why would Honda put balance shafts in the motor if it heavily relies on "harmonic balancer" pulley?

 

Even Honda's performance TypeR versions of cars (ITR, CTR, ATR,...) have harmonically dampened crank shaft pulleys. If there were no downside to it, don't you think that Honda would use a lighter, undamped pulley for better performance on their "R" cars? Honda's engineers saw a reason to use a harmonically dampening pulley on the all-out-performance "R" cars, and it sure wasn't just to reduce engine noise...

Andrew


[Modified by aklucsarits, 7:18 PM 8/21/2002]

 

One last question about the UR pulley set. Are the PS and ALT pullies the same size as stock? AFAIK most UR sets have stock size Accessory pullies and do all the underdriving from the crank, can someone confirm this?

 

ok...well i really dont blame my engine failure on the UR crank pulley *it is a REAL UR pulley NOT a copy like Billy had* I spun the #2 ROD bearing, #1 being furthest from the crank pulley. H22's are notorius for spinning rod bearings. My guess was that i was just running the engine too hard. And my oil was at the low mark on the dip stick, which i know wasnt helping.

Andrew: I am almost 99 percent sure that the CTR N1 crank pulley has NO Dampening mass on it at all. Why would Honda do that if it wasnt all that a big deal to them?

My crank bearings were almost prefect, not much wear on them at all. The ROD bearings in the #2 rod were JACKED! I dont know if any of you saw the pics of my rod, but the bearing looks like it was melted to the rod

i didnt put the UR back on beacuse of all the bad "Who Ha" about the pulley. My motor builder said i had the choice to put it back on or leave it off. He says solid pullies dont really harm H22's. I may run it again in the near future, because after pulling my motor apart and seeing no damage from the pulley itself it seems that it might not hurt the motor.

 

they are a tad bit larger, but they are a whole lot lighter.

One more thing, when i was having my motor built, i had the bottom end balanced. the machine shop said that my Crank was out of balance by quite a bit. They were surprised that a Honda crank was so out of balance. Im pretty sure that an unbalanced crank could lead to uneven bearing wear, or even premature bearing failure.

 

That is correct. The Honda N1 crank pulley is a solid unit. However, Honda sells it as a "race-only" part. CTRs come from the factory with a harmonically dampened crank pulley.

Andrew

 

Right. When I rebuild I will balance the bottom end...so it will all work out.

Given that you had the crank balanced I'm surprised you didn't put the UD pulley back on....

 

I bet he will when he misses the performance the UR crank pulley gave him

 

oh i didnt know that...interesting

 

Well I was thinking if there is anything that doesn't need a harmonic dampener it would be a 4-cylinder fully balanced crank.

If everything's working fine I have a Dyno early next week, so I'll know what kind of gains I got out of it.

 

My crank Pulley is fine...what has actually happened is the KEY broke....which may have caused the timing to go out of whack!!



It's number 23...I believe it's what basically locks in all the pulley/timing wheels. So....Potentially my pistons may have touched the valves! So right now I'm waiting while the investigate the timing issue...the crank pulley itself is fine, so I don't need the UR pulley, go figure after all the discussion...

Now I just hope my timing/valves are ok....I think I will have them do the timing belt now...since they are opening the timing cover....

arrgh this is so frustrating!!

 

WOW!!!! *pulleys 101*

man.. im curious.. wheni pulled my h22a out of its original home.. we rubbed it on the frame.. in turn.. it broke part of the power steering pulley off... just about an inch or so of the edge of it chipped off.... but its rite where there were 2 drilled dots... is this something i should worry about when my car starts working?? will it be off balance like u guys talk about? just curious... thanks...
zane

 

do you mean the part of the crank pulley that drives the power steering assembly? Or are you referring to the actual 3" or so PS pulley?

 

no no no,,
the very edge.. its the actual powersteering pulley.. but i know its attached to the pulley, so that makes me wonder if it will affect the balance...

 

well, if you hurry you can get an OLD-NEW stock UR pulley directly from UR for $114 shipped. just old inventory. they had about 8-10 left when i ordered mine on wednesday(8/21). here's the specials page: http://www.unorthodoxracing.com/specials.html

well nevermind... wrong size for you. oops.


[Modified by del_parker, 5:33 PM 8/22/2002]

 

Ha! I already have the pulley...a buddy had it in his basement....

 

i heard a lot of mechanics and honda specialists say that changing crank pullies on H22's are not recommended. it will do damage sooner or later.

 

Yeah we know...I'm lucky my crank pulley is fine...now I have other problems.