I bought my kit used from CoOlKiDs1979, and it now has around ~55k miles on it. People freak out when I tell them that. I guess it's alot of miles, but my installer said the bearings were tight, and there were no leaks or anything, and that it was in good condition. Coolkids ran the 3.125" pulley for 10,000 miles too.

I have a 3.125" and 8:1 disc sitting in my room and i'm itching to put it in, but don't want to kill my SC. Realisticly, my engine mounts or gears will probably be in greater danger...


So how many miles is on your blower?

 

600

 

10k (3.125)

 

12K 3.25 pulley

 

Sorry, re-checked this morning on the way to work...775.

 

I would say approx 8K or less on mines.. Running 3.33" v2.. But I boost pretty much eveyday when I drive..

 

About 66000 miles with the stock pulley, and another 2000 with a 3.25" pulley. Bearings are still tight, and no unusual noises except the typical V1 noises at idle. I'm more worried about the drivetrain wearing out than the blower.

 

60,000+, all with stock 3.6" and about 10K with 3.125

 

original owner (My 4DSC) : ???? miles
previous owner (Kevin) : about 32k with too many pulleys
current owner (me) : 6000 miles with 3.33 and 3000 miles with 2.87

 

Thanks for the reply's guys...


PCGuRu2K: I think we all get fairly deep into boost several times everyday. I mean, it's irresistable. And sometimes your not paying attention and your in boost. I know that the Florida humidity has a significant effect on my SC's performance though.

BrianV: Didn't you get your blower rebuilt? Did you noticed any unusual differences when you swapped down to the 3.125?

StephenMax: Sounds alot like me. I know technically speaking that "the smaller pulley you put in, the faster you will wear the blower out", but I know the 3.125 doesn't overspin the blower, and that lots of people are running them. What are your opinions on this matter? Are you concerned that you running 4 more psi then stock, that it will strain things too much?

ejj: Dang man, your blower is pretty much brand new. It doesn't require any type of break in period like a new clutch or car does it? Count your blessings and drop down to a 3.125!! You shouldn't ever have to worry for a long time.

 

Kevin as in KevinG, Kevish, Kev-Poe, Aka administrator? Did he ever get that deal rebuilt? You know that the 2.87 slightly overspins the blower around 6300rpm right?

 

Its been on about a month. No break-in needed (I hope ).

I'm going to go to smaller pullies this summer.

 

Nope, never had it rebuilt.

http://www.vortechsuperchargers.com/...pspeedv-2.html
~6.25" crank pulley

http://www.vortechsuperchargers.com/...rformance.html


2.87 goes over efficiency but never does go past maximum impellar speed.

 

Quote:

Did he ever get that deal rebuilt?

Quote:

You know that the 2.87 slightly overspins the blower around 6300rpm right?

I am more worried about engine than the blower...usually I gave her a good warm-up before I do anything wild with her...make sure all the hot slicky oil is lubricating them well. like foreplay, you know.

 

This talk about foreplay and lubing vortechs is making me start thinking things....


AAAAANYWAYS, I've got over 60k on the car, over 20k of that with the blower...

.. still running the original tranny and will be possibly trying on some slicks this weekend to see what happens with my E/T's...


Nothing has choked - YET -

 

~10K with original owner 3.33 pulley

~17K with me, 3.33 pulley

How do I see if the bearings are going? There doesn't seem to be any play in them, but right before my belt snapped last week, I got these weird metal scraping sounds, then the belt snapped. Right now, when I sping the blower by hand, I hear a slight rustling sound like metal on metal, but it spins freely and there isn't any play. Time for a rebuild?

 

When I spun my blower by hand, it didn't spin alot. Some other guy spinned it and thought something was wrong with it, becuase right after you spun it, it would stop. But my installer said that's just the way the blower is, and that it's fine. When I spun it, there was this hollow metalish sound, but it was just the blower spinning I guess, nothing out of the norm.

My installer also said that when he put his hand in front of the blower and had someone revv, it was moving an incredible amount of air. (this is coming from a professional turbo maker) He told me he was surprised that the power built so slow and high in the RPMs. Could it be that 90 degree elbow? Or how about the piping? It goes from 2.5", with a bend that appears crush bent (never confirmed), to a 3" pipe, to the throttle body. I know Mardi got a replacement for that elbow, but didn't note any dramatic improvement. Tom works mostly on 4 bangers, so maybe it just takes more air to boost our big block V6's.

 

Mine spins pretty freely, not loosely, but it feels smooth. Guess I'll just throw it back on and hope for the best. I'm pretty sure the weird noises were caused by the belt about to go. Worst case, I get to pull the blower twice, more practice I guess.

 

Bought mine form Loren00Miata - as far as I know, he bought it around fall 1999 and always had the 3.25" Pulley on it.

Figuring 15k/year until I bought it last June, that's about 40k, plus the 15k I've put on it in the last year or so.

so approximately 55k on the 3.25" Pulley - no problems.

 

This is normal. Don't forget that you're spinning not only the impellor but also the set of gears inside the housing. There is enough friction in the gears to prevent the impellor from spinning like a pinwheel. Turbo impellors do not have step-up gearing like a supercharger has, so they do keep on rotating a good while after spinning them by hand. That is probably what that other guy was familiar with.

I am pretty new with supercharging and engines, so take this with a grain of salt, but if you look at the compressor maps on the Vortech website, it looks like the V1 and V2 blowers as applied to Maxima engines are operating to the left of the efficiency island, indicating the blower pumps more air than what the engine can take. This makes sense, since Vortech's original and main market is 5 liter and up V8s. This may sound like a good thing, at least better than a blower that doesn't pump enough air, but in actuality it results in loss of blower efficiency and increased air charge temperature above and beyond what you would get just from compressing the air. Increased air temperature results in lower power output from an engine as compared to one coupled with a blower that is making the same amount of boost but operating right in the center of the efficiency island.

 

Never had mine rebuilt. No real differences, more power, but seemed a bit rougher, the boost guage shook a bit more, but nothing unnormal.

 

What do you mean by rougher? Rougher as in harder (torquier) acceleration?

Do any of you have over 78k miles on your car? My car is almost there, with no mechanical problems soo far. I hope it stays that way when I drop in the 3.125".