Eaton supercharger questions

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Daz3
Joined: Wed 15 Sep, 2010 20:57
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  Z3 roadster 2.8
Location: Spilsby

Eaton supercharger questions

Post by Daz3 » Sun 23 Feb, 2014 16:34

Anybody got an idea of how the internals should look like on a used charger? I've just stripped mine down none of the bearings have any play just the rotors and bores are scored slightly but I just presumed this is normal.

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Southernboy
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  Z3 roadster 3.0i
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Re: Eaton supercharger questions

Post by Southernboy » Sun 23 Feb, 2014 17:15

I wish I could advise you, but don't know much about them. Have you considered sending the pics to Eaton and asking their advice ?
"Normal is overrated"
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martyb
Joined: Thu 10 Jan, 2013 16:53
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  Z3 roadster 1.9

Re: Eaton supercharger questions

Post by martyb » Sun 23 Feb, 2014 20:08

Cant help either but is this the Eaton supercharger for the 1.9 modification along with gkd fabricated parts?
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Southernboy
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Location: Johannesburg

Re: Eaton supercharger questions

Post by Southernboy » Sun 23 Feb, 2014 20:10

He's doing a 2.8 supercharged conversion... :D
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martyb
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  Z3 roadster 1.9

Re: Eaton supercharger questions

Post by martyb » Sun 23 Feb, 2014 20:32

Ahhh very nice! There was 2 supercharger kits reviewed in performance BMW last month for the z3 2.8 model reported at the 400bhp mark.... :D
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jont
Joined: Tue 18 Oct, 2005 11:54
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  Z3 roadster 1.9
Location: Brisbane

Re: Eaton supercharger questions

Post by jont » Mon 24 Feb, 2014 04:13

Hi
I have just had my unit rebuilt and from what i can see the yours is in is very good condition
Also a suggestion I would advise is put a oil catcher tank on your pcv valve assy also a inline filter to cat any extra oil vapours my unit was a bloody mess when I stripped it down with all of the oil inside.

I have just finished a mileage check and around the city I am getting 31 MPH compared to 26mph before the rebuild also the car feels more responsive

regards JohnT

mnbrennan
Joined: Fri 24 May, 2013 19:30
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  Z3 roadster 2.0

Re: Eaton supercharger questions

Post by mnbrennan » Mon 24 Feb, 2014 06:49

That's a good increase in speed!

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Daz3
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  Z3 roadster 2.8
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Re: Eaton supercharger questions

Post by Daz3 » Mon 24 Feb, 2014 08:35

Thanks for the info johnt I think I'm just going to rebuild the snout with new bearings and seals and possibly do the rear needle bearings while it's out. I was just curious as to what the bore and rotor tips should look like having never seen one stripped. Can't even find any decent pics on google!
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BladeRunner919
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  Z3 roadster 1.9

Re: Eaton supercharger questions

Post by BladeRunner919 » Mon 24 Feb, 2014 13:01

jont wrote:
I have just finished a mileage check and around the city I am getting 31 MPH compared to 26mph before the rebuild also the car feels more responsive
Have you tried moving the waggly stick in the middle away from the '1' position? :D

Vic-Z3
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Re: Eaton supercharger questions

Post by Vic-Z3 » Mon 24 Feb, 2014 18:56

My experience is limited but ................

The rotors are housed central in the bearings at each end and rotate central to the casing.
They should not come into contact with the casing at all unless the bearings get knackered or
the rotors distort under extreme heat or rpm.
Scouring is a sure sign to me that there is a problem.

That is as far as my knowledge base goes on this subject.
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Daz3
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  Z3 roadster 2.8
Location: Spilsby

Re: Eaton supercharger questions

Post by Daz3 » Tue 25 Feb, 2014 16:04

jont wrote:Hi
I have just had my unit rebuilt and from what i can see the yours is in is very good condition
Also a suggestion I would advise is put a oil catcher tank on your pcv valve assy also a inline filter to cat any extra oil vapours my unit was a bloody mess when I stripped it down with all of the oil inside.

I have just finished a mileage check and around the city I am getting 31 MPH compared to 26mph before the rebuild also the car feels more responsive

regards JohnT

With regards to the oil catch can where would this be placed? On the hose that comes off the ICV then recirculate it back into the intake or vent to atmosphere? Thanks
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jont
Joined: Tue 18 Oct, 2005 11:54
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  Z3 roadster 1.9
Location: Brisbane

Re: Eaton supercharger questions

Post by jont » Thu 27 Feb, 2014 03:46

Connect hose to the PCV then into oil catcher can then out of can into intake manifold & put a fuel filter in between the outlet from the to the intake manifold.

Oh one more thing do not purchase a catcher can with a top vent it has to be a sealed unit, this is the type you want.

http://www.ebay.com.au/itm/121019674321 ... 1497.l2649

regards Johnt :shock:

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stu
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Re: Eaton supercharger questions

Post by stu » Thu 27 Feb, 2014 10:01

As said by Vic, I think the scoring is not a good sign.

The clearance between the tips of the rotors and the casing need to be very fine and scores on both suggest there's play in your bearings or something has run through the blower, like dirt/sand and has abraded the surfaces. Basically, the pressure side will always try to find it's way to the none pressure side of the blower, so you're just wasting a whole load of energy if the seals have gone.

I'd suggest you contact the manufacturer or a specialist and get their opinion as there's litte point in putting a 'cream crackered' unit on the car that could potentially cause you some much bigger issues. I'd have thought there are several plating techniques that could be used to bring this back to serviceable, as essentially the casing's not a wear and tear item, nor are the rotor tips.

I'd sure as hell make sure I put in the best bearings of the appropriate spec, which I'd want the manufacturer to confirm.

Bimmerforums seems to have a lot of people with knowledge of FI/blowers.

We have a Vortech V2-SQ on our M52-TU 2.8, but it runs incredibly low boost, 6 psi. It's the ESS conversion and has been brilliant, for the passed 13 years!
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Daz3
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Re: Eaton supercharger questions

Post by Daz3 » Thu 27 Feb, 2014 20:10

Thanks for the input again everyone found this thread which was helpful.
http://rivperformance.editboard.com/t70 ... 62-porting
Seems the score marks are common on this charger. I also found some pics online where the bearings had worn and the rotors are in a lot worse state at the end they've gone. I'm taking the eaton into a bloke at work tomorrow to see what he says. I did show him the pictures and he said looks like normal ware and tare.
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Daz3
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  Z3 roadster 2.8
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Re: Eaton supercharger questions

Post by Daz3 » Sat 01 Mar, 2014 16:00

Just to follow this up I took the charger to a bloke at work that's worked on them before and he said that the marks are just from general use and it's in pretty good nick! On closer inspection the marks on the rotors are just in the coating it's not worn any of the metal away again he said this can be caused by very small pieces of debris flowing through and is nothing to worry about as the tolerances are that fine your going to get marks. The bearings have no play what so ever so I'm thinking I may just change the oil and regrease the needle bearings and see how we go.
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jony9
Joined: Mon 05 May, 2014 19:01
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  Z3 roadster 1.9
Location: Cardiff

Re: Eaton supercharger questions

Post by jony9 » Wed 28 Jan, 2015 18:43

Do you notice its a lot faster with a charger? I am thinking of doing my 1.9

jony9
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  Z3 roadster 1.9
Location: Cardiff

Re: Eaton supercharger questions

Post by jony9 » Wed 04 Feb, 2015 16:42

Anyone?

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