Autotune - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 60 (permalink) Old 01-12-2015, 10:07 PM Thread Starter
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Autotune

Is there anyone here with a degree in hydro-dynamics? Where is the best location to place the dual autotune for a PCV on the other exhaust to give the best numbers for the PCV, ie no eddys, not too hot, not at tip of exhaust......

Anyone put one of these on, or any ideas?
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post #2 of 60 (permalink) Old 01-12-2015, 10:09 PM
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I planned on calling dynojet once I got one. But I'm sure someone here knows, just not me
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post #3 of 60 (permalink) Old 01-13-2015, 12:44 AM
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As close to the head as possible.

-2001 Honda RC51 sp1 " Slightly Modified "
-2001 Honda 929RR Erion Edition
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post #4 of 60 (permalink) Old 01-13-2015, 12:52 AM
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Not closer than 30mm to the ex.port IMO. Usually you place each Oxygen sensor about 100 - 150mm from the ex. valve port though


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post #5 of 60 (permalink) Old 01-13-2015, 01:26 AM Thread Starter
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As the autotune is held up in customs I'm not sure of the length of cable to get to front header. Previous sensors I've seen are more or less under the rearsets. But That's on inlines with single exhaust.

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post #6 of 60 (permalink) Old 01-13-2015, 01:49 AM
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V2 engine with 2 oxygen sensors



Check the oxygen sensor mounts in this KTM RC8 exhaust header



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post #7 of 60 (permalink) Old 01-13-2015, 07:54 AM
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Are you going to run dual Auto tune set ups?
or can the auto support running two 02 sensors?
The one I have I bought for my R1 but it only has one input. Not sure how you will make the table adjustments to run a dual set up.
Personally I would put it in the collector so you get an equal amount of flow from both heads and tun it to get that number right. even dyno guys typically only run one sniffer.
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post #8 of 60 (permalink) Old 01-13-2015, 08:25 AM
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The AT-300 has duel sensors.

I guess that 02's don't have to be the same distance from the exhaust port? Or a few inches/centimeters don't make a difference?
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post #9 of 60 (permalink) Old 01-13-2015, 08:35 AM
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Nice. didn't realize it supported dual sensors.

and no they do not have to be exact. I would make sure they aren't so close they restrict flow.
Make sure they aren't in a bend.
and make sure they are far enough away from the collector to not be picking up exhaust from the other cylinder.
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post #10 of 60 (permalink) Old 01-13-2015, 11:36 AM
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Nice. didn't realize it supported dual sensors.

and no they do not have to be exact. I would make sure they aren't so close they restrict flow.
Make sure they aren't in a bend.
and make sure they are far enough away from the collector to not be picking up exhaust from the other cylinder.
So just about anywhere above the oil filter and somewhere it doesn't get hit by the shock? got it
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