Lightweight Pulley ?

[pitbullowner_2]

I just purchased some pulleys and i was wondering if i would need to do some tuning or anything else to compensate the weight difference

 

[SinaiTSi]

Really shouldn't need to. I hope you didn't buy an undampened underdrive crank pulley. Replacing the crank pulley isn't a bad idea, but make sure it's dampened if you do.

 

[paul s]

I have been running U/D pullies for the past 6 years and the car works awsome, quicker spool up and throttle response..

 

[SinaiTSi]

I have been running U/D pullies for the past 6 years and the car works awsome, quicker spool up and throttle response..

Awesome, I honestly can't say that they don't work or will hurt your car as I have never used them, I've just heard many people advise against them and I know MachV generally advises against them. Read this link:

http://www.machv.com/tip11cranpul.html

I'm not saying you're wrong. I'm just curious as to what you think about that.

 

[pitbullowner_2]

WOW seems to me it is a huge gamble that could go either way bad or good. I think i will be selling these to someone else its to big of a risk for the little bit of hp i would be gaining thanx alot for that link sinaitsi you saved my car from possible early retirement. Anymore links for the good or bad would greatly be appreciated.

 

[paul s]

As I said I have been using them for a while with no problems, I also have no B/S and light flywheel(8lb). The engine is fully balanced. Just do whatever you think will work on your car..It's also a big gamble to run 25psi on pump gas everyday but many people including me do it with no problems..

 

[nightracer91]

Go with the dampened, it is does make a difference.

 

[SinaiTSi]

WOW seems to me it is a huge gamble that could go either way bad or good. I think i will be selling these to someone else its to big of a risk for the little bit of hp i would be gaining thanx alot for that link sinaitsi you saved my car from possible early retirement. Anymore links for the good or bad would greatly be appreciated.

Yeah, I too was once thinking about getting an undampened pulley, but I did some reading about it and it seemed that the general consensus is to stick with dampened pulley. I like the idea of having the extra hp because of the less rotating mass, but I would absolutely hate to have it cause my engine to fail pre-maturely. I think it's great that paul is running it and has had luck with it, and I hope no future problems arise, but I'm not sure it's a risk i'm willing to take. IMO, stay with dampened, but it's obviously up to you.

 

[slider85]

I've been using an undampened crank pulley for over a year and no problems. I also did all the reading about it and I found that it does not make a difference which one you get. I believe I read that all the BMW cars use an undampened pulley as well. I'm not saying our cars are Beemers, but it does not make a difference. And, when I looked at my pulley after it was taken off, the rubber is so thin and hard that I doubt it really does anything to help your engine.

 

[SinaiTSi]

but it does not make a difference

That's really not true. People are paid a lot of money to design cars and everything that goes in to them has a purpose. Mitsubishi didn't decided to just make a dampened pulley because they thought it looked better, or wanted the pulley to be a few extra pounds heavier. It's like that for a reason.

Still there is no proven fact that an U/D pulley WILL hurt your car, but there is a general consensus that says don't do it. Oldman summed it up perfectly with an ealier post:

A light weight alluminum pulley is a undampened pulley which as you can see, the majority of the opinions is against using one period, at least in a turbo DSM where the gain is insignificant. You are welcome to disagree but please bring some facts to the table instead of just the opinion.