Printable Version of Topic

Posted by: tod914 Jul 25 2003, 06:03 AM

Any1 know where i can get a replacement diaphram for my air pressure sensor? Or of any1 that rebuilds them with warranty?

Posted by: Bleyseng Jul 25 2003, 08:47 AM

They are made out of unobtainium which comes from some part of Iraq. This is the real reason Bush made war with Iraq, to get the last of the unobtainium on Earth!


Ray Greenwood is trying to have some made on the STF. I don't know where Beck Industries gets theirs.
I buy good MPS to get their diaphrams and calibrate them for 037's and 043's when I can.
Warranty, hmm...I live test everyone I build.

Geoff

Posted by: tod914 Jul 25 2003, 11:32 AM

Geoff,

do you have any contact info for Beck? Do you have 1 for sale? Jay at Part Werks said he sells rebuilds. He wasnt sure if the diaphrams are replaced are not. Or if they are calibrated.

Posted by: Brad Roberts Jul 25 2003, 11:42 AM

Geoff.. I will need 6500 reminders to bring all the MPS's I have for you to JRust event.

I keep them all in one box..so they are easy to load.


B

Posted by: Bleyseng Jul 25 2003, 05:07 PM

Give them to Kevin Powers as I can't go, too busy with work lately. (for once)

Geoff

Don't worry I'll call your ass a million times before the event.

I get alot of requests for 2.0L MPS's that WORK and are set up right.

Posted by: tod914 Jul 25 2003, 05:53 PM

ok so i assume you presently dont have any available

Posted by: garyh Jul 25 2003, 06:12 PM

I'll get you one.

PM me for my email address; the one in my profile is having server problems.

G.

Posted by: tod914 Jul 28 2003, 06:19 AM

Ok Gary,

Thanks for all the help with this. I tried to email Brad but his email isnt functioning from what he said. I'll PM him regarding this.

Posted by: garyh Jul 28 2003, 10:46 AM

My 'list' email is on the same server. Wonder how many emails I've missed...

Posted by: RustyWa Jul 28 2003, 12:53 PM

Geoff,

One of these days, if you have time, I would like you to put my rebuilt MPS on the Wavetek to see what it's doing. Just to see if it's within specs. If you remember, my MPS is an 037 unit with screws instead of rivets, car is a '75. Epoxy plug is still intact.

I pulled 20" of vacuum on it and it held for 20 minutes, so the diaphram is in good shape.

Posted by: Bleyseng Jul 28 2003, 06:01 PM

Probably set too rich if its 037 is my guess, because you have the orginal ECU too. Way better than too lean.

Geoff

Posted by: RustyWa Jul 28 2003, 09:44 PM

But if it's a rebuilt...aren't all bets off for what its calibrated at?

Posted by: Bleyseng Jul 28 2003, 10:57 PM

Yeah, if its a Beck job it is set up for a 1.7L which is too lean. They use funny diaphrams and steel cells too. They also paint them bright silver.

Geoff

Posted by: ChrisReale Jul 28 2003, 11:01 PM

Do you guys mean Brett, not Beck

Posted by: Jeff Bowlsby Jul 29 2003, 07:27 AM

Actually, its Bret Instruments....

Posted by: Bleyseng Jul 29 2003, 09:10 AM

Ah heck, whatever

Posted by: RustyWa Jul 30 2003, 01:36 PM

Are there any other tell-tale signs of a Bret rebuild? Mine is not bright silver...but it could have been at one time I guess.

Posted by: MarkV Jul 31 2003, 11:37 AM

Does it look like this?


Attached image(s)

Posted by: Demick Jul 31 2003, 11:56 AM

Brett puts a Brett Instruments sticker on it when they rebuild them, but that could be long gone too.....

Demick

Posted by: RustyWa Jul 31 2003, 12:06 PM

That looks like epoxy being used to keep that screw from backing out? Mine has what looks like a dollop of paint holding the smaller screws in. I do have the epoxy over the adjustment plug.

Posted by: Demick Jul 31 2003, 12:42 PM

The epoxy is mainly there as an indication of whether the unit has been tampered with. On the plug, it also serves to keep it from moving.

Demick

Posted by: ChrisReale Jul 31 2003, 01:13 PM

RustyWa, if you still have an 037 unit with the plug and if it holds a vacuum, let Geoff take some readings from it. The 037 is the most rare of the MPS's and finding a unmolested unit that still holds a vacuum is hard to come by.

Posted by: RustyWa Jul 31 2003, 01:23 PM

Chris,

The only problem is that my MPS has screws instead of the rivets...so I'm guessing it's a rebuilt. I would like to get numbers from it just to know where it's at.

Posted by: MarkV Jul 31 2003, 03:15 PM

I think the MPS in the photo I posted is a Brett rebuild. This is what the readings are on it. The certificate shows that it has a leak, turns out it was a bad vacuum pump.


Attached thumbnail(s)

Posted by: RustyWa Jul 31 2003, 04:58 PM

Interesting...

On the inductance graph...It seems to be showing your rebuilt 043 MPS follows pretty closely to an unmolested 043 MPS...but your numbers are slightly different. Does this mean your MPS is running to the rich side or the lean side? Or is it so damn close to a good MPS that it really doesn't matter?

Posted by: MarkV Jul 31 2003, 05:05 PM

I think it is running lean.

Posted by: Bleyseng Jul 31 2003, 06:04 PM

The smaller the numbers the leaner it is, the higher the numbers the richer it is.
Almost all of the MPS's have at idle the value of .71, the 037's are the odd balls.

Geoff

Posted by: RustyWa Oct 8 2003, 11:28 PM

I'm surprised my engine has not burned up.

I recently got a used Wavetek 27XT DMM that can also test inductance. I thought I would check out my MPS, to see where it's at. My MPS looks to be a rebuilt 037 unit.

Testing the secondary coils, my MPS appears to be WAY LEAN. I'm hoping that my meter just needs calibration. I was on the 20H range

0 in. Hg = 1.01H
5 in. Hg = 0.84H
15 in. Hg = 0.64H

Here's my graph..


Attached image(s)

Posted by: Bleyseng Oct 9 2003, 12:16 AM

Your 037 should read:
0hg-1.54
4hg-1.26
15hg-.80

Posted by: Demick Oct 9 2003, 08:53 AM

Brad Anders suggests that the 27XT should not be used because it "lacks sufficient current drive to test this large inductance accurately". I don't know how much error it might cause in your readings. I believe that Brad began his research using a 27xt, so he probably has a good idea for how far off your readings might be by using one of those meters.

Demick

Posted by: RustyWa Oct 9 2003, 10:45 AM

I'll have to read his document again...the one I have printed out suggests using either the 27XT or the LCR55.
I'll check out his site again at lunch.

Yep...he does say to not use it. Well that sucks.