Q. Are these flashes that have the fuel mapping included in the flash able to calculate AFR no matter what pipe you have?
A. Briefly, we are fine if we do not lift. We lift, that makes the cams overlap, pull a fresh charge out as the intake is open, yes, you have a slight loss of that charge leaving, because the pipe is more open. So to compensate for this, you add a pig to clean up the loss.
So if I start with slips and I like my flash and then go with a full system it will change the map or i'm still running the same map as everyone else?
A. You might say, I have a stock map and when I change to slips, I changed something, so each time I make a change, I have to change the map to match the AFR [wink-wink = hp] or air flow ratio think [overlap speed changes].
Maybe let me ask it a different way. Does the logic of the flash say ok computer make the bike hit 13.1 AFR...
Yes... Under load. During cruise, no. More like 15 AFR. Mine with PAIR still in play, no flash, no pig, no pipe, stock AFR reads at 16.1 cruising. In a few days I'll know what the AFR is with the PAIR closed off.
Q....or does it say add x amount of fuel like the PCV?
No and Yes. We are in open loop so if we are preset to run 13.1, that is our target forever. Load wise, this says to run rich so fuel comes in and we are well into the rich/cool area so no lean happens. So yes, when x meets y, there is an x amount calculated richer when the vacuum load at the IAP [intake air pressure] demands it. Whereas, the pig5 will be programmed to run the best tabled number in that cell, i.e., the learn process.
Do any of the flashes remove or remap safety mode? Thats two accounts I have read saying the guhl flash does not.
This one I'll take as guess at and assume, or until Don or Brock show up to say different. My understanding is to loophole the intervention, you layer the FULL map over the safe map. This way, the cells have the same exact FULL cell to meet and greet at that x to y intersect and when intervened, the first entry is the layered number, or the FULL number that was flashed over the safe map. So, either Smoke or Romes will say ye or nay as to cutting and pasting over the safe cells. Sounds like Mav gets his way as to leaving the whole bike alone without hurting 1/4 and foot times 'entering the intervening goings on.'
Q. Is there a stock AFR sensor in the stock exhaust, and do you reinstall that with your aftermarket pipe or disconnect? Seems obvious you would need one but not everything is as obvious as I think it is.
AFR is an air to liquid detecting device. This is only found in a closed loop system where the plan is to run at a specific number all the time. If you had a euro compliant 14, you'd run with an 02 and be locked into a 14.7: ratio all the time. If you tuned the pig to run 13:1, the 02 would close that ratio down and install the preset of 14.7 out the pipe. So for us to see what the numbers do in the map, we use the air to liquid finder and adjust to our cruise range, highest safe lean running, or all power with all the torque possible in the 12:1 ratio or a touch leaner toward 12.3 say for argument sake.
So think flash more as a stock ECU that has its parameters reset in a FULL locked capacity. We still need the pig to increase grunt at the bottom with the accel mode. We can bring more AFR, or dial in a cleaner math calc with the pig in pc5 mode. We can adjust the fuel map when a pipe or a/c is change. We can run without the a/cleaner installed and adjust the AFR. We can set more maps on the fly. We can turn the pig off and be out of the loop at all.
If you are going to give the bike a tune, a flash is half the tuneup. Yes, you can go flash alone and be done no matter the pipe. But to take advantage of the flash, the pig map will compliment the whole tuning package. Same as if you bought slips and found it a bit more peppy without doing anything else. But, add the pc? Someone is going to make more hp with that pig being added.
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