I just finished rebuilding my YSi. I dealt with 928 Motorsports. They seemed nice, got my bearings to my door in great time and shipped them out in the boxes they came in. I had a friend who had previously dealt with them in porshe stuff and he seemed to think they were decent.

Got it all back together, just waiting for snow to clear to see how it does.

 

Not at all, having actually rebuilt superchargers and had them last would say otherwise. Do it because I can and not making dime LOL.

Now back to theory, when will your car be done? That is a bigger question that would require an understanding beyond a layperson.

 

Does anyone have any tips for getting the shims correct?

 

Keep shims as is. Did you mark off impeller nut, you want to torque to same point plus a bit… That is if you kept original high speed seal.

 

I don't know where any of the shims went. They were in a baggy that came with the case

And I wasn't going to use the old seal. It's definitely gone. I did torque down the impeller nut- maybe I did that wrong. Is there a procedure for that too?

 

The wave washers..ie shims go on the pulley side of the gear case.

They are there to apply a light pre-load to the angular contact bearings.

 

The wave washers..ie shims go on the pulley side of the gear case.

They are there to apply a light pre-load to the angular contact bearings.

 

Can you order a part through them without them doing the work?

 

I pulled apart my Vortech V3 today to replace a leaking seal. Unfortunately when I split the case, my bearing fell apart on the high speed side. I needed a replacement and through lots of searches I found everyone recommending SKF 7003 CD/P4ADGA as the highspeed pair of bearings to replace all vortech models.
As another member posted in this thread, he had a bearing with 7203c printed on his bearing. Mine also happens to have these numbers and according to my research, a 7203c bearing has dimensions of 17x40x12 compared to the SKF 7003 CD/P4ADGA with bearing dimensions of 17x35x10
so Vortech must have redesigned their choice of bearing as these two are not compatible. The bright side for anyone in the future that reads this thread going through the same trouble I did, I found a cheap replacement that appears to meet all specifications.
Boca Bearing Company offers a bearing B7203C that is according to their website (http://www.bocabearings.com/bearing-...2-B7203CTP4SUL)
matching in demensions, has an ABEC rating of: ABEC#7/ISOP4
Has a speed rating of : RPM Oil (x1000) 56, which is great considering vortech recommends no more than 52k rpm.
I am not sure if dynamic load matters at all but Boca Bearing dynamic load has a rating of 1101kgf which translates to 2427lbs, and for comparison's sake, SKF bearings that go for $150 each have a rating of 2074lbs.
So I am not sure why they are so cheap since all my research exceeds the SKF equivalent.
I am going through with the purchase and will keep you updated if I have any failures.



Boca Bearings also offers a Hybrid Ceramic Bearing (Ceramic *****) for ultra high RPM of 71k RPM! However, they are double the price, still much chepaer than SKF, (part number HCB7203C) But it doesn't specific on Boca Bearing's website what ABEC rating it uses. Amazon lists it as ABEC#7/ISOP4 and is sold by Boca directly.
I am choosing the steel ball version because that most closely resembles the same bearing already in my vortech and it still meets my RPM requirements!

Hope this helps someone, someday!

 

As long as you found all the ***** and the bearing wasnt damaged, I've put them back together before and ran them. Never had a problem.

A few times I took my YSi apart, the inner bearing on the large gear would come apart, as the outer race stuck in the alloy casing.
I found it better to have the casing slightly warm before trying to take things apart.

Good info on bearing part numbers though.

I couldnt find any bearings with suitable speed ratings for the high speed side. Bigger low speed bearings were easy enough though.

 

Hey guys, I stumbled across this thread and realized I posted up all that info above 4.5 years ago.
Good news is those Boca bearings B7203C/T/P4S UL have been installed since my post and lasted aproximately 50k HARD track (road course, HPDE) miles. My V3 started making a grumbling noise again so I tore it down and found the low speed bearing burned up but these Boca's were still spinning smooth. I am replacing them again with the same part number because some bearing grit did get into them from the failed low speed bearing that I never replaced originally.
Quick update, they also offer ceramic ball bearings for a 71k rpm limit listed as part# HCB7203C/T/P4S UL for those looking to stay more true to original if the originals did indeed have ceramic ball bearings from vortech.

 

Sounds like they worked out pretty good for you. Great information for others in the future.

 

Good info! I had my V2 rebuilt by Vortech about a year ago. Inspected, rebuilt, and all cleaned up to boot. Cost to have them do all of it is just under $400, was definitely worth it in my opinion. If you're close enough in CA, you can probably bring it in yourself and save on shipping too. I'm about 2 hours away from them, so I shipped it for about $30 each way.

 

Thanks foe the headsup. Im in norcal. I dont really mind tearing things down and doing it myself. Learning is half the fun for me. All in all it runs me about $200 to rebuild myself and this time im investing extra to put in a billet impeller to boost topend performance.

 

Sorry man, I didn't mean to give you the impression that I was discounting any of your findings or choices. Wasn't at all my intention. I was mostly just responding to the title of the thread for future search info if someone was looking at their options.

I checked out the billet impeller option when I was trying to figure out why my V2 seemed to be making more boost than it should, looks like a cool idea. I couldn't find much, if any, info online from people that had actually used/installed them though. And I definitely don't need MORE boost right now haha. Would be a cool option for down the road that would still be "stealth" or emission/smog passable.

 

anyone happen to have part numbers for the low speed bearings on a v3ti as well as the numbers for double wall seals? Looking to rebuild one and convert to oil fed.

 

Are there no part numbers on your bearings ?

And that's the high speed one in pieces.

 

there is a part number on the high speed it’s nachi 7203. I dont see a number for the low speeds on them. Also looking for seal part numbers. Im going with the 71k bearing for high speed. Blower is at 56,000 rpm before slinger let go and took out high speed bearing

 

There should be numbers on them both.

Although when I did my YSi about 15 years ago, they were actually Vortech marked bearings, but I think they stopped that maybe 10 years ago. So finding suitable bearings back then was a total nightmare.

I think the low speeds on the YSi were a 7205 high precision angular contact, although the lower models might just use regular roller bearings ? Not sure. There should be numbers on them though.

Cant recall on the seal on the input/low speed....I just used a regular oil seal bought on dimensions.

I never did find a supply info for the high speed seal, but never did change it anyway as no need to.

I think that supercharger rebuilds place sells complete kits ? Although they probably grind part numbers off.

 

For anyone looking in the future here is what I ended up with for a v3ti rebuild

(2) hcb7203c/t/p4s ul from boca bearings 71k rpm $152

(2) timken 6205 -2rsc3 through amazon 20k rpm
$25

Hybrid seal kit with main gasket and volute gasket from supercharger rebuilds $80

This puts me at just under $400 for a more stout unit that will be over spun

i also got a vortech oil injector for $40 to convert to oil fed so I don’t have oil slingers turning into a shrapnel with a 3.12 pulley

oil feed kit -4an $100