BC

Pretty easy actually.

This is the one with the straight cut gears, so it supposed to be a bit less efficient, but "heavier duty".

Supposedly the seals are proprietary, as are the bearings. One is actually marked Vortech.
I called these guys here:
Capa Online

They are in Australia. He said that indeed I could get these parts separatley from him. I suspect that the bearings could be had through here:

Abec bearings supplier

The vortech site says they use ABEC 7 and 9 bearings - I assume those are the really "slippery" ones like you can get for your inline skates. Not much for torque or longevity I guess.





Much simpler inside then I ever imagined it to be. Just two gears lined up for a ratio increase, and a lightweight impeller. It was filthy in mine, so I think the motor oil can really leave some deposits if your not careful. I'll have to get an airgun and get the impeller nut off - then I think there is another seal behind there that needs to be replaced. Oil isn't supposed to be in the inductor are.

Can anyone explain ABEC ratings to me? I would appreciate it. I am assuming I can get the bearings for this unit anywhere. It out of warrantee anyway.

BC

Well, I found that the seal at the outside is a normal size for a motorcycle balance shaft and a skidoo whatever it is.

http://justatv.com/pages/snowmobile_...seals_snow.htm

25x40x7

Nice.

FlyingDog

So much for proprietary...

touque

Brendan - from my roller hockey experience

I'm definitely no expert on ABEC ratings, but it stands for Annular Bearing Engineering Committee (or Council depending on who you talk to). ABEC bearings are numbered from 1 to 9 with the higher number meaning a higher/tighter tolerance (as well as costing more). I have only seen bearings in odd-numbers but that doesn't mean there's no even-numbered bearings out there - I just haven't seen them.

Generally the higher number of an ABEC rating means a bearing which SHOULD be better and could be faster. For example, many people generally assume that an ABEC 5 is always a faster bearing than ABEC 3 but it's not necessarily the case. An ABEC 5 bearing made out of sub-standard material may be worst than an ABEC 3 rated bearing made out of better materials. Depending on the application, you want to match up the ABEC rating with what you're using the bearings for. A 50 lb. child skating on inline hockey skates will not notice as much impact with different ABEC-rated bearings then your supersharger which spins just a 'tad' faster

If you stick with ABEC 7 or 9, you are using one of the top two-rated classifications and really can't go wrong with either...

Imo000

I've refurbished my Paxton SC before it went on to the 928. The seals are usully standard size but not standard rating. A standard seal will only handle a certain amount of rpm before it heats up and wears out. That's the reason I had to orde the impeller shaft bearing from Paxton (now owned by Vortech). This could be the same for bearings too. Make sure they can handle the extreme speeds that the impeller spins at.

BC

Thanks for the info Troy. I assumed that the tolerance was the issue.

I can get the seals from the place I linked in AU, but they are a bit pricey for basic seals. Supposed to be teflon.

BC

I have found that the bearings can be purchased from NACHI or SKF bearing companies, as well as many others. The seals can be had from Chicago rawhide, and some other places.

Where did I get this info? From the Mustang guys who have been doing vortechs for years before us.

http://jobyteknik.homeip.net/corvett...arger_rebuild/

http://www.corral.net/forums/showthr...hlight=vortech

BC

Nope, I know, nobody cares, but just in case another boob like me tries this site first for this info, it will be here.

I site I found has these 6205 and 6003 bearing sizes in ceramic, which should deal with the rpm and heat issues:

http://www.geckermotorsports.com/CeramicBearings.htm

These guys seem to get them from here:

http://www.cbrbearing.com/

Imo000

Brendan,

I know there are a few people that could use this info. I'm one of them. Thanks for the info.

BC

I'm glad. It seems its a bit taboo to take these things apart, but it seems like regular stuff to me.

SharkSkin

This is great info, Brendan. Thanks for posting it! now... hmmm... where to file...

FlyingDog

Funny... a Mustang buddy of mine who hates internet forums was just asking me if I knew anything about DIY supercharger overhauls.

Lagavulin

Brendan, you're good at taking things apart, but will you ever put it back together?

Nice info BTW!

Herr-Kuhn

You going to run this one? I just might have the S4 setup ready to rock and roll sometime early next year...

BC

Actually the 78 is progressing nicely Lag. Engine is finished (for a while now) Oil pump is primed, Transmission and brakes on on the car, body is in final stages of primer wet sanding with 600. Inerior door panels done, wiring system chosen, and megasquirt is ready to be wired up.