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Old 01-05-2010, 04:44 PM   #1
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Default No brand AFR Gauge

Scenario, want a cheap AFR gauge just for peace of mind whilst street tuning MS.

What do people think about using the no-brand el-cheapo gauges that ebay has to offer with the LC1? Most of them work with a narrow band sensor but that's ok because the LC1 can emulate narrow band.

The question is, will it give useful data to make it worth buying a digital read out gauge or would it be better to have a basic indication of mixture from a guage like the one below? Bearing in mind that when I'm tuning I'll have a laptop, the guage is just to warn me if I'm about to melt a piston.

Opinions?

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Old 01-05-2010, 04:52 PM   #2
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get a cheap digital led gauge. you'll thank me later.
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Old 01-05-2010, 05:13 PM   #3
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Like this one?
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Old 01-05-2010, 05:14 PM   #4
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We've rigged LC-1s to drive these types of gauges before. It's actually better to set it slightly different from narrow band emulation - have it give you 1 volt at 10:1 and 0 volts at either 18:1 or 20:1. Not as good as a gauge designed for it though; if you don't already have an LC-1, it's probably going to be cheaper to order one bundled with a DB gauge.

P.S. The gauge in your first post looks like it's actually from Auto Meter's cheap gauge division, unless it's fake.
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Old 01-05-2010, 05:15 PM   #5
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Quote:
Originally Posted by Duckie_uk View Post
Like this one?
Yes.
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Old 01-05-2010, 05:21 PM   #6
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Quote:
Originally Posted by Matt Cramer View Post
if you don't already have an LC-1, it's probably going to be cheaper to order one bundled with a DB gauge..
Already got one :(

I'm not after any useful data really. I just feel naked without having a laptop on my passenger seat and I want an indication if anything is VERY VERY wrong.
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Old 01-05-2010, 05:21 PM   #7
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Quote:
Originally Posted by Matt Cramer View Post
We've rigged LC-1s to drive these types of gauges before. It's actually better to set it slightly different from narrow band emulation - have it give you 1 volt at 10:1 and 0 volts at either 18:1 or 20:1. Not as good as a gauge designed for it though; if you don't already have an LC-1, it's probably going to be cheaper to order one bundled with a DB gauge.
I use 0-1v 17-10:1

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Old 01-05-2010, 05:26 PM   #8
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Quote:
Originally Posted by Duckie_uk View Post
Scenario, want a cheap AFR gauge just for peace of mind whilst street tuning MS.
You can do this, but you don't program the analog out for NB emulation, there would be no point in that. Set it up something like 1V=10:1, 0V=20:1.
Or you can get a cheap panel display voltmeter like THIS. Then set up the analog out for 1V=10:1, 2V=20:1. Most of these elcheapo displays give you an option of setting up a 10x multiplier to move the decimal, meaning if your air fuel ratio is 10.5:1, the display would read 10.5 because the LC1's analog out would be sending 1.05V to the gauge, 1.05 x 10 = 10.5. Get it?
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Old 01-05-2010, 05:26 PM   #9
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Are you not happy with your sweepy dot gauge Brain?

They do seem an awful lot cheaper

Loving the getto voltmeter idea!
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Old 01-05-2010, 05:46 PM   #10
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The cool part about a numeric gauge is that you know when you're .1 off from where you should be. I was running 11.8:1 on the track before I tuned for heat soak. Now its back to 11.3:1 on the track in boost.
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Old 01-05-2010, 05:51 PM   #11
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Old 01-05-2010, 06:03 PM   #12
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Damn that thing looks brilliant! I can thinks of loads of applications for it.
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