Aircleaner, pipes and EFI

Hobbit

ok you are not replacing the orginal ECM you are adding a piggy back item that sits between the ECM and the injectors, it then amends the pulse and duration of the injector to ensure the bike runs ok and it leaves no footprint in the ECM and totally removable.
SERT/Downloads leave a foot print on the ECM and are not removable due to them being tagged to the bike they are attached to

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smitty901

Honestly a TFI basicly allows you to set the fuel on your HD they way Harley would have done it if the EPA was telling them what to set it at.
The HD download for stage 1 only brings the bike back to 14.7:1 air to fuel were the EPA wants it, and gives you a IMO worthless 1000 more rpm. If you do not go with a fuel manager you need the download because the stage 1 will make the bike run way to lean
That the short version.

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The Infantry leads the way

Scubadog

Fuel managers such as the PC III are user friendly, easy to install and you can make custom adjustments to suit your set-up and riding style. You own it and you program it for FREE from then on. Change exhaust, change the map. No charge. Buying a self programmable fuel manager is the best choice if Stage 1 is as far as you plan to go. A fuel manager is like buying a 100ft tape measure. A dealer download is like buying a 12inch wooden ruler that you use once and throw away. Both work, but which one would you really rather have??

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08 Ultra
A/N Big Sucker
Rinehart TD's / PC III

tderksen

What about aftermarket EFI like ThunderMax AutoTune?
has anyone used one of these? I have a 2009 FXSTC that I am still running 100% stock. I was looking at the stage one upgrade from my HD dealer, and there is a componant that they put in that is about $550 which is an add-on to the stock EFI. I am not sure I see the difference between that and a PCIII which is less than the HD part, and I have a client with a Dyno that will tune my bike for free.
But, the Thundermax EFI brags about being a replacement to the stock HD EFI and never having to Dyno it again?
so many options.....

smitty901

Unless your building a 140 UP monster bike got with the TFI
IMO

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The Infantry leads the way

wildspirit97

I like the Thundermax, and there are many +++ to using it other than Auto tunning. It's a lot of $$$ but to me it's worth it. It comes with a 3 year warranty, excellent customer support, The wide band sensors mean better tunning. It keeps a log of your engine temps and and rpm's that you can look at any time. it has an engine temp alarm that you can set to what ever temp. you want to be warned about. you can adjust the AFR to engine temp settings meaning how much AFR during warm up and you can even richen it up a little if it starts getting a little too hot. while "linked up you can monitor you engine temp,afr,timing,outside temp,idle speed, and many others. it's very precise in the tuning, it has 32 throttle position settings for every 2000 rpm's for afr adjustment. If you wanted to you could also put it on a dyno and play timing or the rear trim and probably get a couple more horses out of it, but it runs great out of the box. you could also take it off and put it on a different bike if you wanted.

Bottom line it's a good unit, if you buy it won't be sorry......on the other hand that doesn't mean that you would be happy with something else.

eleft36

And, what's on your FXST.

I'm not satisfied with how my bike runs, it's a lot more comfortable than my '03 sportster but doesn't run as well.

Al

twoup

I agree 100%!

It's an easy install. Tweak it yourself.

It really enhanced the SE Stage 1 on my 88ci T/C.

martysnarf

RE: ThunderMax...

AWESOME piece of equipment and it works FANTASTIC. I have had one on my '05 RK and it runs like a DREAM. Lots of torque, sensitivity, and power. Runs perfect.

That said- there is ONE big downside to it, that Glider actually pointed out that I had never thought of. What if you break down and you are not near a shop that can work on a TMax?? Or if you don't happen to have a laptop and interface cables with you? You are SCREWED, and HD shops can't work on 'em, either. That goes for any of the actual ECM replacement units. The units that BYPASS the sensors and allow you to keep the stock ECM intact (like the TFI, PC, etc) are better in that respect. Now, luckily I have never been in that situation, and I live very close to the TMax dealer where I bought it, so I don't run that risk too often. But for those of you that take long trips into states and places that you are unfamiliar with, you need to factor that into your plans in case God forbid you have a problem and need to have your scoot worked on. There is also the fact that a TMax is pretty expensive, relatively.

Like I said, I'm thrilled with my TMax, but it does have it's pluses and minuses. Take the time and do the research to weigh them out, and you'll find the right one to suit your needs.

Be safe out there!

zyepod

Sorry if I'm sounding dumb here...
1. What exactly is an SE Stage 1? The Intake/Air filter?
2. Is TFI a brand or does it stand for something.
3. If I put a set of V&H Oval Slip-Ons on would I have to re-tune anything?
4. If I put a set of V&H Dresser Duals and the Slip-Ons on would I have to re-tune?