Rinehart True Duals

I am certainly NOT a pro in answering this question, but my understanding is that if you are running stock pipes with slip ons, then go to true duals, you will have to re-map or play with the carbs. Slip on to slip on will depend on what to what you are going to and the air flow going through. As to what pipes do what, I can't answer that as I am waiting for my slip ons to arrive to change out from stock pipes/mufflers. Hope this helps a little bit.

The HD se slip ons and a stage 1 flash with se air filter would be fine, once you go outside IMHO of the "HD PARTS BIN" then you need to consider aftermarket tuning devices.

For simple add on pipes, Rinehardts or vance and hines etc with the filter and stage 1 chip I'd look into a DFO which allows you to add fuel to the mix.

If however you think you'd want to do more down the road, cams, heads, big bore etc then do a powercommander as you can take fuel out, change timing things you cannot do with a ecm or a dfo.

Cracker yes you are running lean without bumping the fuel, if you run a dyno on it and get the AFR you'll probably find you are way lean, and that means hot which means longer term engine problem potential is up there.

You can do it, but it's not in the best interest of your motors life JMHO and with the MM system you have the fault tolerence of the ECM isn't there like the newer delphi's which can accomodate mild changes.

BTW add a dfo (techlusion or any manuf) and pop on a bit of fuel it will probably wake up the motor and improve your fuel economy and power.

CC

wouldn't call anyone I haven't met face to face anything like that LOL

Hey it's newschool LOL

Downloads are simply the burning or processing of information from one device onto or into another electronic device.

In this case All HD EFI bikes have a ECM or Electronic Control Module (a computer on board) This module contains a master chipset that has fuel and timing codes which are setup to run from the factory with the stock components.

When you change air filter and pipes to less restrictive the ECM doesn't know that (neither does a carb so it's the same principle) So the ECM continues to provide the electronic injectors and ignition the same information that the stock parts needed to operate.

Now we drop on pipes and filter and the motor goes leaner and detonation etc can happen so we need to rejet the ECM.

You can do this a couple of ways

1) HD can download Stage Upgrades from 1 to 3 for your mods depending on what you do. A stage 1 is Pipes, SE Air filter and chip download,
2) Get an aftermarket ECM adapter like a powercommander (PC) that changes the signals to or from the ECM depending on the model PC you have. So it gets its own special download called a map, this map adds fuel and timing or takes it away where you need it to, you do have to program or download a map, then maybe hand adjust it (just like changing jets only you don't get fuel all over your hands, pants, motor, wifes new rug).

When you hear DFO thats a digital fuel optimizer or electronic carb tool for tuning EFI. it has 4 dials that you set, one is pilot jet range, one is needle, one is main, and one for pump. So you can tune EFI like a carb without getting dirty. Problem is that you can't take fuel out when you need to nor can you setup timing.


3) A combo of a Stage 1 download from HD to get rid of the rev limiter and set a higher fuel base, then a powercommander or DFO to fine tune.

4) get a full iginiton system like S&S VFI which has a knock sensor that tells the system to retard timing at detonation or advance under proper conditions for full power. Pretty cool stuff.

EFI and Carbs are similar in use, they just do the job differently same results. EFI is easier to start and a bit more work to get power out of , but that's changing.