Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: "Albert Tong" <(email redacted)>

Hi all,

I am experiencing a abnormally loud high pitch noise from the T28
turbocharger. The noise is most noticable when the boost gauge indicate
4 psi and above. Spool up time seem to be ok. I checked the oil inlet
line tonight and there is a steady oil flow. There is a small amount of
play on the shaft, but the shaft seem to rotate freely. Anybody have
any idea what caused the noise? How much play on the shaft is too much?
Corky?

Albert Tong

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This read-only message was archived from a public mail list.
Mail From: "Albert Tong" <(email redacted)>

Hi all,

I am experiencing an abnormally loud high pitch noise from the T28
turbocharger. The noise is most noticeable when the boost gauge
indicate 4 psi and above. Spool up time seem to be ok. I checked the
oil inlet line tonight and there is a steady oil flow. There is a small
amount of play on the shaft, but the shaft seem to rotate freely.
Anybody have any idea what caused the noise? How much play on the shaft
is too much? Corky?

Albert Tong

______________________________________________________
Get Your Private, Free Email at hotmail.com

This read-only message was archived from a public mail list.
Mail From: dlralt <(email redacted)>

At 09:19 PM 8/24/98 PDT, Albert Tong wrote:
>
>Hi all,
>
> I am experiencing a abnormally loud high pitch noise from the T28
>turbocharger. The noise is most noticable when the boost gauge indicate
>4 psi and above. Spool up time seem to be ok. I checked the oil inlet
>line tonight and there is a steady oil flow. There is a small amount of
>play on the shaft, but the shaft seem to rotate freely. Anybody have
>any idea what caused the noise? How much play on the shaft is too much?
>Corky?
>
>Albert Tong
>
Maybe it's a shriek from a vac (boost?) leak? Slightly loose clamp anywhere
on the route from turbo to intake.
bill cardell
Dealer Alternative, Inc.
"We make Miatas fly!"
970-464-0878
dlralt.com

This read-only message was archived from a public mail list.
Mail From: dlralt <(email redacted)>

Time to do some filling in on what's going on with the FM ecus. Lots of
activity on this list regarding a/c, idle problems, etc. I'll cover what's
being done later, but first wanted to unburden myself a little bit.

What we're doing with the ecu and the way we're soliciting feedback from
our customers realtime on this list is somewhat unique, I believe. You are
getting to see development done with our pants down, to put it crudely.
Link has been very responsive to deal with and can now send us new software
to test immediately. We are having a hard time getting the reprogrammable
window chips from Motorola. Had to fill out a form proving we weren't
building Scud guidance systems and now they're telling us a huge lead time.
Don't want to (and can't afford to)send out a huge number of one time only
processors only to find we have better software the next week. As soon as
we have processors to burn, will send latest software to everyone on the
lifetime software upgrade list.

Spoke to Link last night, suspect that the switching threshold may be off
for turning on the compressor in the 1.8s. It works fine in our 1.8, but
may be close enough to the switching threshold that it will not always work
in all cars. This is a software fix. On the a/c fans, we have spent more
time in the manuals to see how Mazda does them and have changed the
software accordingly. Also making changes in the way the idle is controlled
when the a/c is on to limit idle speed changes.
Another big change in the software is that the idle zones are now treated
as though the keypad is unplugged and are limited to only 3% correction if
rpm is below 2,000 rpm. New software also has n/a defaults in it with all
six MAP rows below atmospheric. 1.6 owners, don't feel left out in the
cold, we are simultaneously working on the 1.6s.

Spent some time in the last week datalogging the stock ecus with a custom
datalogger. Quite interesting seeing how active the timing curves are under
acceleration. I believe a lot of people think that setting their idle
timing sets the whole scale, whereas in reality, the timing runs from ten
at idle all the way up into the 40s at cruise and back down into the
twenties under load.

We are truly working night and day to make this the most convenient,
easiest to use ecu available; your feedback is invaluable to us. Once in
awhile, just to make me feel good, fill me in on a couple of the things
that work well with the system.

Thanks for listening!
bill cardell
Dealer Alternative, Inc.
"We make Miatas fly!"
970-464-0878
dlralt.com

This read-only message was archived from a public mail list.
Mail From: Sam Sharp <(email redacted)>

Bill:

I think you should feel great! You've really developed a wonderful
product. I'm sure nobody knows how much time and money you've spent on it,
but I, for one, am really proud to own one!

I'm very happy with the way mine is working. With this latest version of
"The Chip" everything is perfect. I don't have ANY of the classic
problems. (The Knock Control and Boost Control aren't too good, but it's a
1.6, so I'll be patient.....) It learned fast and has stayed very
cosistent. It runs smooth, idles smooth, AC on or off. Mileage is up over
the last version. Baby don't need no steenking keypad!

Thanks for all you do for us!

Sam and Baby, who says *****RAINSUX*****


At 10:48 AM 8/25/98 -0600, dlralt wrote:
>
>Time to do some filling in on what's going on with the FM ecus. Lots of
>activity on this list regarding a/c, idle problems, etc. I'll cover what's
>being done later, but first wanted to unburden myself a little bit.
>
>What we're doing with the ecu and the way we're soliciting feedback from
>our customers realtime on this list is somewhat unique, I believe. You are
>getting to see development done with our pants down, to put it crudely.
>Link has been very responsive to deal with and can now send us new software
>to test immediately. We are having a hard time getting the reprogrammable
>window chips from Motorola. Had to fill out a form proving we weren't
>building Scud guidance systems and now they're telling us a huge lead time.
>Don't want to (and can't afford to)send out a huge number of one time only
>processors only to find we have better software the next week. As soon as
>we have processors to burn, will send latest software to everyone on the
>lifetime software upgrade list.
>
>Spoke to Link last night, suspect that the switching threshold may be off
>for turning on the compressor in the 1.8s. It works fine in our 1.8, but
>may be close enough to the switching threshold that it will not always work
>in all cars. This is a software fix. On the a/c fans, we have spent more
>time in the manuals to see how Mazda does them and have changed the
>software accordingly. Also making changes in the way the idle is controlled
>when the a/c is on to limit idle speed changes.
>Another big change in the software is that the idle zones are now treated
>as though the keypad is unplugged and are limited to only 3% correction if
>rpm is below 2,000 rpm. New software also has n/a defaults in it with all
>six MAP rows below atmospheric. 1.6 owners, don't feel left out in the
>cold, we are simultaneously working on the 1.6s.
>
>Spent some time in the last week datalogging the stock ecus with a custom
>datalogger. Quite interesting seeing how active the timing curves are under
>acceleration. I believe a lot of people think that setting their idle
>timing sets the whole scale, whereas in reality, the timing runs from ten
>at idle all the way up into the 40s at cruise and back down into the
>twenties under load.
>
>We are truly working night and day to make this the most convenient,
>easiest to use ecu available; your feedback is invaluable to us. Once in
>awhile, just to make me feel good, fill me in on a couple of the things
>that work well with the system.
>
>Thanks for listening!
>bill cardell
>Dealer Alternative, Inc.
>"We make Miatas fly!"
>970-464-0878
>dlralt.com
>
>
>

This read-only message was archived from a public mail list.
Mail From: Joseph F Guerrero <(email redacted)>

> I am experiencing a abnormally loud high pitch noise from the T28
> turbocharger. The noise is most noticable when the boost gauge indicate
> 4 psi and above. Spool up time seem to be ok. I checked the oil inlet
> line tonight and there is a steady oil flow. There is a small amount of
> play on the shaft, but the shaft seem to rotate freely. Anybody have
> any idea what caused the noise? How much play on the shaft is too much?
> Corky?
>
> Albert Tong
>
Not sure what your setup is , but after I installed by BEGI System III
I had a high pitched whirring noise during boost conditions. It turned out
that one end of the mitsu surge valve had slipped off. Visually it
looked fine, but as soon as I tugged at the valve I noticed it had slipped
out of the orange pipe connector.

Good luck,
Joe