LM1 Digital AirFuel Ratio Meter

2503 Views 8 Replies 0 Participants Last post by Mike Adams (Drmike), May 10, 2006

Discussion Starter · Mar 26, 2005

Has anyone used this product?

Has anyone used this product? What are your thoughts

http://www.innovatemotorsports.com/products/lm1.php

Thanks.

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Discussion Starter · #2 · Mar 26, 2005

It looks like it should be abl

It looks like it should be able to do the job of reading the exhaust and allowing adjustments to be made to set the mixture within spec.

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Discussion Starter · #3 · Mar 26, 2005

Don't mean to hijack this

Don't mean to hijack this thread or anything. But I would like JRV's...and others...opinions too. I recently purchased a SUN MGA-1400 4-Gas Analyzer in mint condition with very little usage on it. The unit was service/calibrated a few months ago and is ready for use. I bought it so I fine-tune my TR fuel system.

Is this a good unit?

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Discussion Starter · #4 · Mar 26, 2005

Jeff,

imo a true Gas Analyz

Jeff,

imo a true Gas Analyzer such as the one you bought is by far the best way to test exhaust easily & accurately.

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Discussion Starter · #5 · Mar 27, 2005

Yes
I am using an Innovate LM

Yes
I am using an Innovate LM-1 to tune my webers 'on the road'. I will later get the rpm input, and wish I had gotten the package to start. It's really intersting to watch the real time A/F under different real world loadings, a bit different from the dyno I'm finding. As example, here's a trace of dumping the throttle at 60 mph cruise in 5th gear. You can watch the A/F drop as the accel jets fire, then it lean back out as I come off the throttle for traffic. Then you can see the effect of partial throttle movements as I go up hills and around in highway traffic. Note the closed throttle over-run up over 14 which tells me I should be ok in not wanting to overload the plugs. It's fun to set the idle and cruise A/Fs, and I am making an adaptor to the individual sample ports where I can set the A/F barrel by barrel. Once the A/F fully sorted under the 'street WOT dyno run', I know I'm making max hp. I've ordered one size down on the accel jet based on this trace. I think tuning a K-jet would be even easier.
In short, so far, it's really cool.
Just my experience
rt

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Discussion Starter · #6 · Mar 27, 2005

cockpit and sensor view.
It h

cockpit and sensor view.
It has an internal memory to later download. The cable runs out the right window along the side of the car and through the engine compartment down to the sensor. I have a plug for the exhaust bung (both included w/ LM-1) when not in use.

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Discussion Starter · #7 · Mar 27, 2005

Neat setup Russ.

does the

Neat setup Russ.

does the LM-1 also indicate HC?

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Discussion Starter · #8 · Mar 27, 2005

JRV
I don't think an HC i

JRV
I don't think an HC is part of the basic kit components. There are numerous programmable inputs (e.g. rpm, MAP, TP) but do not remember seeing an HC probe specifically. I'm not near my manual, but will re-read when I get home in a week.
I've also heard that with pretty radical cams, readings at low rpms may not be as accurate as you might expect, but regains accuracy as the cams come in their power range.
The basic kit had the Bosch 5 wire wide band, LM-1 unit, power, software and computer interface cables in addition to the bung and threaded insert.
best
rt

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Discussion Starter · #9 · May 10, 2006

I have a 5-gas analyzer. It wo

I have a 5-gas analyzer. It works well. BUT it's response speed is too slow to analyze anything but steady state rpm/load. The LM-1 is fast enough to tune the transition circuit and the accel pumps.

Also, you can plot AFR vs. RPM, Manifold Pressure, and Timing Advance with the LMA-3 add-on.

The LM-1 does not directly measure free HC. But there are conversion tables for AFR vs. free HC and CO

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