Today's Message Index:
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1. 07:02 AM - Re: Re: LM3914 Bar Graph circuit question (Mike Welch)
2. 03:05 PM - Re: Battery Relay post too short (rvg8tor)
3. 10:32 PM - Re: Battery Relay post too short (jmjula)
Message 1
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| Subject: | Re: LM3914 Bar Graph circuit question |
Hi Bob=2C
What an incredibly astute understanding of the thermister's role. As far
as I
can gather=2C 99.99% of what you said is how I understood it=2C too. IIRC
=2C the
coolant temp sensor is one wire=2C depending on the body of it for ground.
I agree
the pot is being used basically a rheostat.
I haven't started the engine yet with the new turbo installation. For lo
w(ish)
RPMs=2C the stock ECU is supposedly capable of proper A/F ratios up to 5 ps
i.
(with an unaltered coolant temperature sensor setup) I have a low-range
pressure switch (2-7 psi) attached to the throttle body intake housing. On
ce boost
goes over 4.5 psi=2C it clicks over to the modified portion=2C allowing me
to 'dial in'
my own F/A ratio=2C from information displayed by the EGT=2C and A/F ratio
=2C and boost
gages.
Since most airplane engine's run at extended periods of time at specific
RPMs=2C
I would also expect that the rheostat settings would be 'set it=2C and forg
et it'.
I have not fired up the engine yet. I am in the very final stages of hoo
king up
my overhead and front panel. In fact=2C today=2C I will be installing the
overhead panel=2C
and set the front panel into its premade brackets. All I do then is connec
t the two DB15
wiring harnesses=2C and the two panels are done. Hook up the various sendo
rs=2C and
I ought to be able to hear some engine noises pretty soon.
I can't really say how much of the rheostat's range would be needed. I'l
l do some
internet searching and see if there are any 'posted' voltage outputs. I wo
uld suspect
there is not=2C though. But=2C I'll look.
I think what I need to do is A) get the electrical things finished B) s
tart the engine
and get the timing set correctly C) begin the anaysis part where I can fi
nd out what
the stock ECU can handle...and what I need to augment.
Once I have a whole lot of data to know what I'm dealing with=2C then I t
hink I can
answer some of your well though-out questions.
With your description of the complexities of the whole process=2C I think
before I build
any kind of LED indicator=2C I ought to get the engine going first=2C do so
me testing=2C and THEN
determine how best to display the rheostat's setting.
Thanks for the help=2C Bob
Mike Welch
Message 2
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| Subject: | Re: Battery Relay post too short |
Thanks everyone for the inputs, I will try the Loctite idea.
Mike
--------
Mike "Nemo" Elliott
RV-8A QB (Fuselage)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=323782#323782
Message 3
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| Subject: | Re: Battery Relay post too short |
I have the same issue. I am planning to chuck the washer and outer nut for a NAS
21042 self locking small profile nut. That should leave room for two connections
and self lock, but I need to order some to be sure.
--------
"What is chiefly needed is skill rather than machinery." - Wilbur Wright,
1902
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=323796#323796
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