Has anyone tried this? It looks interesting. I now have a goPro, so I can video the gauges. If this thing is accurate, that could be a valuable tuning tool.

A/F gauge

I like the digital one better. #3918

I like it. I have the mtx-l digital and sometimes it sweeps thru the numbers so fast cant get a positive read. With the needle i think you might get a better idea if its sweeping quickly.

yes the digital reads fast, thats the point, I can see a misfire on my gauge.

I've got a MTX-L
It has connections for simple datalogging.
Much easier to view the numbers afterwards if you can match them with the driving conditions.
But it really shines when you have a digital ECU so you view the gauge and still feed the output into the ECU.

I have been happy with innovate's products. If this is something for the coupe I would recommend two of them. I was really surprised how different the two banks on my car are when I added a second sensor. With 8 carbs you can dial that in pretty good if you have the info.

Never used that feature of it before. Dont know how.

I've used 2 of these gauges in a car with a vintage longram intake setup, just to get the mixtures to (kinda) match each other.

Accuracy can be a problem since wide bands are very sensitive to air leaks. Also, this is digital electronics so it is super important to have good voltage and good grounds. Everything has to be super tight and you don't want interference from ignition wires.

But air leaks are the big killer. Any extra air coming into the exhaust will make the gauge read lean so you can really chase your tail if you don't have the exhaust system super sealed.

Not trying to talk you out of it at all, just make sure your exhaust is sealed tight as a drum and that you follow the instructions on wiring exactly. These things are not like an old school oil pressure gauge where any fool can install one. You have to be careful with a wideband to get accurate results.

The two banks might not have different AFR, you might have an exhaust leak on the side that reads lean. Or you might have one wideband that is reading off. You can swap the sensors side to side to see if the problem follows the sensor or stays with the side. If it stays with the side then I'd bet you have a small exhaust leak.

We see this all the time on the dyno and I've never found the issue to be with the engine. It is always with the sensors or the exhuast system. Most engines just don't run richer or leaner on one side than the other unless the induction system is really strange.

I could see different bank to bank AFR on a long ram as it basically turns the engine into two four cylinder engines. Getting 2 carbs to make identical fuel curves on what is effectively 2 similar but separate engines would be quite a challenge.

I don't think the balance tube would make any difference to speak of on this as far as AFR is concerned at least above idle.

Kevin

Yep you would be correct, but a single plane intake only needs 1 o2 sensor.

Apparently I thought I was quoting BBM's post. Oops..

What kind of induction is Bad340fish running?

Kevin

This would be for my coupe. The 2 plenums on the cross ram intake are not connected, so 2 meters would be a good idea.

Sorry Kevin, confusion on my part lol no harm no foul

Lol. No problem, I thought I was quoting BBM who was talking about a long ram setup when it was actually Bad340fish. He said he was seeing a difference bank to bank so now I'm curious what his setup is.

Kevin

Single plane indy intake for W2 heads. Its got lots of camshaft so it has a lot of reversion which makes a mess of the intake at low flow scenarios. Its port fuel injected so the fuel part is consistent but the airflow will cause variances. I knew that happened and have seen several cases of it but I didn't realize it would be so much. The amount of fuel feeding the two banks can be very different at low rpm and low load. Like I said before once you get tipped into the throttle and the RPM comes up it all falls into line.

Joel, they make a nice digital gauge that runs two sensors but that may not be the look you want with your coupe.

i have often wondered when running multiple carbs, it would be somehow beneficial to set each up for the best [equal] results on a single carb manifold, then switch to the milti-carb intake, and tune from there. would that get quicker, and better [easier to obtain] results ?

Joel My MTX L has been trouble free.

I went ahead and ordered a pair of MTX-L. Thanks for all the help!