Which AFR gauge for a motorcycle "

afterburn 549 · 06-08-2015, 08:17 AM

Any experiences with them?
In my quest for perfection (lol) I considering some new technology with the old .
Instead of endless runs (carburated ) or dyno trips, a AFR set up might be the deal to invest in.
Any thoughts?
thanx
(old evo, carburetor , weld in some bungs)

afterburn 549 · 06-09-2015, 02:33 AM

Ding ?

Chocaholic · 04:55 AM

Try HDForums.com or such. Suspect that might provide your answer quicker and more accurately than a Porsche off-topic forum.

BTW, tons of threads on the topic. Here's one that should lead to your answer:

http://harleytechtalk.org/htt/index.php?topic=71545.0

bleucamaro · 06-09-2015, 06:42 AM

Big question, Do you want it permanently mounted, or is this just going to be installed for testing and tuning? After all, once you get the carbs tuned, there's not much use keeping it installed unless you change elevations a lot, and are constantly re-jetting.

I would take a look at AEM's (yes, the company known for ricer doo-dads) UEGO because the controller is all contained within the gauge, and there is less stuff you will have to zip-tie or otherwise hide.

Conversely, I would stay away from Innovate's LC-1 because I've had 2 fail. Their LM-2 is really great tuning tool though, just big and clunky for bike use.

afterburn 549 · 06-09-2015, 07:35 AM

I would like a gauge, but will suffer with a temporary unit to get the job done.
There were some gauges for sale by RB racing. But, they are out and have no clue when more will be in or restocked.

bleucamaro · 06-09-2015, 08:33 AM

Just googled that RB racing one. Its pretty ugly. Get the AEM one.

afterburn 549 · 06-09-2015, 09:08 AM

link to it?
I would like one that is complete with sensor and bung to be welded in.
One that will not get mad at most gasolines.
PS- I sure like the advertisement for the "Inovate motor sport gauge"...But there seems to be issues with most of them.

bleucamaro · 06-09-2015, 10:00 AM

Digital Wideband UEGO AFR Gauge | AEM

P/N: 30-4110

comes with
AEM Gauge-Type UEGO Controller Parts
1 x UEGO Gauge Assembly
1 x UEGO Sensor
1 x O2 Sensor Bung
4 x Butt Connectors
1 x Installation Instruction
1 x 4 Lead Harness
1 x UEGO Sensor Harness
1 x Silver Bezel
1 x Black Lambda Faceplate
1 x White AFR Faceplate

Pick your favorite vendor to buy from.

I like the look of their failsafe gauge better, but it does more and there-by is more expensive.

afterburn 549 · 06-09-2015, 10:45 AM

Thanx a Bunch!

asphaltgambler · 11:39 AM

My opinion is that what ever cost they are; a half-day and a handful of pulls on a dyno with a good tuner does a much, much better job. The reason is that ignition timing plays (both initial + total advance) an important role as well as the fuel curve. You can accomplish soooo much more with a half-day session of getting everything dialed-in with the bike stationary under controlled conditions with a knowledgeable guy.

I would thoroughly research a good dyno guy in your area that has a 4 gas analyzer. Don't confine those searches to just "Harley" shops as good tuners usually know more than, just say, "Jap" or "Cruiser" bikes.

You would not believe how many guys will spend thousand's of $$$$$ on parts and so much time on putting it all together, but refuse to spend the $300-$500 for dyno time to dial it in. Like all the ***** they bought is supposed to get friendly and work their magic automatically.

afterburn 549 · 06-09-2015, 11:49 AM

Good info.......but i have zero for dyno people somewhat conveniently near me .
They are at least 3 hours away.
I have Daytona twin tech for ign. 2 plugs per cyl.
Pretty adjustable .
The local dyno guy here has zero for understanding of this set up and disagrees with my needs.
So as per usual i am on my own, which is OK

asphaltgambler · 12:04 PM

Well don't give up. Better to try on your own then if no good guy is available. Nothing worse than a bad or ignorant dyno guy. Your timing module should come with basic set-up / directions. Usually for 2 plugs-per cylinder you can reduce total timing by @ 2 degrees.

My experience tells me that whatever total timing curve you choose, just make sure it's all in by 3500 RPM. That is a good starting point, then you can concentrate on jetting. Your carb from Zipper's should also have some basic tuning instructions. Most likely the low speed jet will be spot-on, the Thunder-jet will be spot-on so you can concentrate on the main (now mid range) jetting which should be close. It takes a patience and a little time to ride, remove and read the plugs. Be aware that with today's fuels that reading may require more riding time to color the plug.

After you establish this then you may want to back up your total timing point to an earlier RPM; like 3200 RPM. Then ride and see if it likes it.

afterburn 549 · 06-09-2015, 12:32 PM

OK, thanx!

afterburn 549 · 07:09 PM

When the dude at the dyno shop said " dual plugs are just good for a cleaner burn, and thats it, "
I knew i could not trust him.
Dual plugs in a big bore have a lot of advantages .
I thought about what he said for a moment ,and figured my time was worth more then trying to educate him!
End if discussion about paying him to dial in my lil engine.
I figure with a AFR gauge I can get this pretty close with respects to timing and mixture .
I have had my Daytona twin tech on for 3000 miles now .
Seems to be fine.
The carburation sucks.
i think the cam is making the vacume diaphragm flutter.
The carb is 21 years old with over 50K on it.
There could be hidden problems in it from other well meaning people.

asphaltgambler · 06-10-2015, 06:25 AM

Dual plugging a Harley allows you to reduce total timing by a tad, which makes more HP and torque, by a tad. Depending on what engine, cylinder head, combustion chamber design, sometimes it's a must, sometimes a waste. Generally speaking, all iron, EVO and early twin cam stock combustion chamber designs benefit from 2 plugs where the 2nd is located correctly.

afterburn 549 · 06-10-2015, 07:08 AM

Yes
I have understood that for years, it does not take genius to realize with high dome piston(s) it better to have two plugs if one can not be installed in the center.
The Daytona tech 3 is nice because i can keep the timing under control.
Like i said if i had to explain basics to the dyno guy, I figure he will not know what i do not know what to ask of him (from the dyno report)
I do know you have to be savvy to run a dyno properly .
I do not need one for Hp /TQ bragging rights. Thats just the dividend from the run(S)