Are underdrive/lightened pulleys a good investment, do they show any gains? On ebay i saw underdrive crank pulleys and OBX underdrive pulley kits for my engine (98 civic Si D16y8) I think one of them may be for power steering so i wouldn't need it but i wanted to get some feedback on these types of mods.

Thanks!
VINCE

 

a very BAD idea...............

10,000 miles with a lightweight pulley.........



underdrive pulleys for the alt. and PS, won't hurt much, just the battery.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone &raquo;</TD></TR><TR><TD CLASS="quote">a very BAD idea...............

10,000 miles with a lightweight pulley.........


underdrive pulleys for the alt. and PS, won't hurt much, just the battery.</TD></TR></TABLE>

What does a pulley have to do with how F***** up thoes Crank bearings are? i dont understand, youre not changing anything but the weight and material of the pulley itself.

 

lol

I think mista is talking about the crank pulley.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1991_jdm_sleeper &raquo;</TD></TR><TR><TD CLASS="quote">lol

I think mista is talking about the crank pulley.</TD></TR></TABLE>

Yeah so am i, there is no reason a Crank pulley should affect how your Bearings wear out like that, lol, 10k thats BS pulleys didnt do that, thoes bearings look like they never had oil on them, lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honda_guy_83 &raquo;</TD></TR><TR><TD CLASS="quote">

Yeah so am i, there is no reason a Crank pulley should affect how your Bearings wear out like that, lol, 10k thats BS pulleys didnt do that, thoes bearings look like they never had oil on them, lol</TD></TR></TABLE>

FIRST: light weight crank pulley don't have any harmonic ballancer ( I know for shure that unorthodox racing don't have them) that's why they worn out bearing like that.

Second: you are calling BS on Mista bone comment, wich generally is totally stupid since this guy is one of the most respected guy out here, he know more about honda trany that you will probably never ever do in you entire life.

third : Before calling BS on someone you should really search the topic itself cause right now you look like an *** hole cause this subject have been covered many time and you are not going to change anything in the fact that light weight crank pulley destroy Honda engine cause of missing engine ballancement.

KRanked

 

you wanna relax a bit guy, i was not calling BS on anybody, i was saying that its BS that thoes bearing wore out like that, because i never saw that before, i know he is very respected and as you can see in my post before that i did not say anything offencive to him, yes i might be a noob on honda tec but notice that i'm more respectful then most guys on here and dont use obscene language, so maybe you should relax man i just want to get to know people off here so dont give me a hard time, thanks


Modified by honda_guy_83 at 4:33 AM 11/2/2003

 

also i came here to learn a bit more about hondas since i have a CRX, so maybe you can explain to me why bearings would wear out like that and teach a guy a few things, cuz i'm clue less in why that would happen. how does ballance affect wear?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honda_guy_83 &raquo;</TD></TR><TR><TD CLASS="quote">also i came here to learn a bit more about hondas since i have a CRX, so maybe you can explain to me why bearings would wear out like that and teach a guy a few things, cuz i'm clue less in why that would happen. how does ballance affect wear?</TD></TR></TABLE>


yea mang, I would like to know also

 

Take a look at the Crank pully, they didn't make them that heavy for the hell of it, they are needed to dampen harmonic vibrations that resonate in the crank, all engines have then and for very good reason. Take it off and all sorts of bad things can happen and will driven enough miles. Race motors aren't expected to be drive 100,000 plus miles.

I would take Mistabone at his word. He is extremely knowledgible and probibly moreso than most members of this board.

 

ok so you wanna talk BS...........

same motor, 30,000 miles, 25 bottle of nitrous....damn near a 12 second car, and I put the stock pulley back on.........



I've been doing stuff like this for 20 years now.......

 

wow 12 seconds must be fun.

look man i did not intend to insult you, so i hope everything is cool now.

also i know now to get thoes cheep pulleys now, thank you.

 

so crank pulleys are a big no no but i'm safe with the alternator one for my engine...i'm not running an amped stereo or anything so will i notice any negative affects on my engine/performance/reliability if i do use an alternator pulley?

Thanks,
Vince

 

I've been racing my crx for 3 years now with the Unorthodox Racing crank pulley. I'm very happy with it. The factory D16a6 provides no harmonic dampning what so ever. On the D16a6, the dampning is done by the oil pump. My good friend that I race with has an 85 SI and has been racing for every with the UR crank pulley. Over 200,000 miles on his motor and going strong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honda_guy_83 &raquo;</TD></TR><TR><TD CLASS="quote">

What does a pulley have to do with how F***** up thoes Crank bearings are? i dont understand, youre not changing anything but the weight and material of the pulley itself.

</TD></TR></TABLE>


Don't come off with an attitude when you have no clue as to what you are talking about. Honda's pulley is harmonic balanced for a reason, inline with the rod/stroke ratio. It is meant to be that heavy for a reason. A lightened pulley may give quicker revs for a while, until you throw a rod or spin a bearing due to NO balancing. They are iffy to use. 34 posts and you are cursing at MistaBone? This guy is a seasoned vet, stop being a @#%hole. Read up before you act like you know what you are talking about.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honda_guy_83 &raquo;</TD></TR><TR><TD CLASS="quote">wow 12 seconds must be fun.

look man i did not intend to insult you, so i hope everything is cool now.

also i know now to get thoes cheep pulleys now, thank you.</TD></TR></TABLE>

Hah as soon as you realized you screwed up, you jumped right on his johnson....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ef ***** &raquo;</TD></TR><TR><TD CLASS="quote">

Hah as soon as you realized you screwed up, you jumped right on his johnson.... </TD></TR></TABLE>

look man dont give me a hard time, ok so i dont know alot about crank pulleys, and no i did not screp up, how did i screw up? i'm just saying that i did not intend to upset anybody, so why dont we all drop it eh?

 

Screwed up=realized he was right. Lighten up bro...just a joke. Crazy Canadian...j/k. Just don't curse at an H-T vet(mistabone) when you do not what you are talking about, or "assume" to be true-- and you'll learn alot here.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ef ***** &raquo;</TD></TR><TR><TD CLASS="quote">Screwed up=realized he was right. Lighten up bro...just a joke. Crazy Canadian...j/k. Just don't curse at an H-T vet(mistabone) when you do not what you are talking about, or "assume" to be true-- and you'll learn alot here.</TD></TR></TABLE>

And thats what i'm here for, is to learn, now that its all good
and i'm not canadian, lol, i'm a polak

 

Explains it all...

 

so in the same sense...light flywheels would do the same thing?

 

Fom AEM's website (www.aempower.com)

Question
Why doesn’t AEM make a crank pulley?




Answer
Virtually all of the cars we make Tru-Power pulleys for come equipped with a vibration dampener mounted to the crank from the factory. Aftermarket crank pulleys require the removal of these dampeners, which are required for engine life. Their removal can cause damage to your engine over time. If the manufacturers could save on vehicle costs by eliminating this device they would have done so.

 

just FYI, 88's dont have any harmonic dampener.

 

from what i heard they mess up your alt. and the main fuse box underneath your hood. which is rather expansive to replace. they're not worth 200 bucks

 

Thanks for the few posts that actually adressed the topic...looks like a bad idea and definitely not worth the money. I'll save up for some better goodies