Dyno a Trike

[Mr.Wizard]

There aren't very many indy's or stealerships that can dyno a trike.

How did you get yours done?

This should be an interesting thread. Anyone think they need a dyno map?

 

[saybel]

Mine is an 07 Ultra, never been dyno'd. Don't plan on it. Only changes are air filter and the pipes. Runs great!

 

[Mr.Wizard]

OK but AFR's and VE tables for a SERT or PC III for a trike shouldn't be that difficult to set and the old school way could cost you a cylinder wash or melted components while watching for your blue pipes to get bluer or your plugs to wash out.

I hear this a lot..... "my dyno guy was great".... just to be put on another dyno and find his 02 sensors were off by .5 to 3.5 and so is your map. So now your crank bearings are scored because the dyno guy never calibrates his sniffer. (sounds funny doesn't it)

My thoughts are based on how others are doing trikes. Bikes are easy but trikes bring special challenges.

If your map was correct before your conversion will it be after? Does the extra weight cause your cruising TP to change thus placing you in a richer or leaner table?

 

[Mr.Wizard]

I really like the DFI-3. I liked the TMax w/ auto as well until I tried it on a 96" smog motor. What's the name of the character with a set of six guns and a long red mustache and beard.. Yosemite Sam? Pop.. pow.. bang.

I'm a tinkerer and tweaker.. you know what that means.. "trouble"

I think you will agree with me here that the 96" tour bikes with the crossover tube is the most difficult to tune without decel pop/exhaust reversion when you change to a free breather or baffles over 1.75. 2.0 and up get a little touchy to tune unless you have true duals and slam in something like a set of Andrews 26H cams with some adjustable rods then you'll get back some of the bottom end torque. Right?

There is a way to tune a Harley Delphi trike then take it all off when you're done. I, like you, have spent countless hours tweaking maps. Dayton also makes a Twin Scan II w/ WEGO. (won't explain it because you already know what it is) This is what I have been using since they came out. I was wondering if anyone else would say they have tried it.

I guess we could sit back and chat about this for weeks and compare notes. Maybe we will get a chance to one day next to a camp fire and cold drink.


Oh yeah.. if you use an infrared temperature gun on the pipes and heads after each run it will help you tremendously.

Cheers

 

[Gorilla]

Hi guys, I just thought I would throw my 2 cents worth about TMAX w/auto learn wide band O2 sensors. I installed it on my HD 103 with true dual Rineharts/ K&N air filter, S&S 510G cams. When I first installed the TMAX with the base map for my setup it worked fine. I even took it out to Sturgis, Yellowstone, and Bear-Tooth Pass, after about 2 months it started acting up. Lost the full throttle setting. Anything above 3/4 throttle it would fall on it's face. Low end torque went down and it bucked when cool. Reprogramed the base and it worked fine for a couple of weeks then it started to learn the same issues. I put a Power Commander on (I've used several of these in the past) and installed the eliminators and a correct Map and all is great. Sold the TMAX. My first and only experience with the TMAX. Ted

 

[Nana]

OK Ultraboy and Reksul --- this is encrypted just to keep Nana in the dark, right? Nice goin! You've slowed me down (being a nurse and not an electrical enginner, and all) but you haven't stopped me. I'm getting out my english/dyno-speak dictionary and I'm gonna know what you are talking about before I'm done!!!!

 

[Mr.Wizard]

No worries Nana..

I think UB and I are about done speaking carbon monoxide for a while.. that is until someone hands me a beer. (Hand me three and I can't walk or type)

Oh, except for one thing... "twinkie cams" LOL I like that one. The Andrews are OK for me.. they give me decent pulling torque to mid range over the stock cams and that's where I ride. Rarely do I ever get over 4 grand.

 

[Nana]

You guys crack me up. Don't worry, you are outside of my area of expertise, but with the right dictionary/resource book, I have the brain power to catch on......eventually! I do know enough to know you need to be laughed at, even at this level of comprehension

 

[Mr.Wizard]

UB.. I've read that before.. so, you're the guy!

Nana.. not to worry... Harley didn't use the o2 sensors until the 07 bikes unless you want to count the 06 Dyna. They all run in closed loop now with the o2 sensors in the cruising ranges unless you tell it not to while using a SERT to remap. If you get our of your cruising ranges the ECM will put it in open loop.

UB.. the way I look at it there will be lots of bikes running around with bad sensors very soon as the mileage rolls on. At least it doesn't take much to diagnose a bad one nor do they cost that much to replace. Now if we can get the dyno guys to fresh air calibrate before a dyno run.. that would be a great start.

Yeah.. I can see it will take more than one cold one to have a conversation with you. Hope that happens one day.


Well.. back from the Cardiologist.. said I have four more years left before my energizer bunny retires. Heck.. saddle up! !

 

[Gorilla]

Ultraboy and reksul. Thanks for the in depth explaination. I knew the concept but not the details. Also UB thanks for the info that supports my real time bad experience with the TMAX and my good experiences with S&S 510G's and Power Commander.

 

[Mr.Wizard]

UB.. 10-4 on that. Well said...


Just to reverify my stance on the TMax. Just as I've seen with the Power Commander, there are bad TMax units that went out from the factory . Not all of them are junk. Not saying that at all. Both PC and TMax have very satisfied users out there.

With any product that is available on the market you are going to find one that has issues or just doesn't respond to your needs. Goes double for those who are not sure how to set them without doing the homework involved to match the map to their preferences as UB stated above.

Just because a unit comes with "auto-tune" function doesn't mean to bolt it up and forget about it. Some knowledge of mapping and computers is still required. Finding a qualified and competent tester is as, if not more, important than the EFI device you purchase. A good scenario would be to obtain both.