90mph lean spot

kinger

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This isn't a huge issue but I noticed when I run at 90 mph I go really lean like 14-15:1 just a titch more gas and it drops to 10.8:1 and climbs to 11.5 ish, almost like the GEMS is kicking in that last stage. I just ride 85 or 100 and really dont spend that much time at 90mph crusing.

Everything else is dialed in on the GEMS works great with the new fuel pump!
 
Yea buddy spend no time there with those numbers, it will not last! What kind of boost?

Skydog
 
At that speed about 10-11 psi. I usually blip the gas and it drops instantly then adjust my speed. Be nice to not have it but its perfect every where else.

Holy crap boost rules!
 
good luck getting rid of that, i tried all last winter to deal with that and i never got rid of it, the only way i got it to run smoother was to put a pc111 on it. with the gems box my a/f was constantly dancing all over the place, and yes i spent alot of time tring different settings from people and from mpi. i eventualy gave up and just rode it.
 
Actually Im fairly impressed with the GEMS so far, it holds perfect A/F from idle to WOT with the exception of that light load cruising at that certain RPM/mph combo.

Just playing around though your right; there will be no way to get rid of it if I adjust the main up it will be rich down where I cruise the most, if I adjust the boost accel up WOT goes pig rich.


Oh well for now she runs like a raped ape and I will hardly ever spend time at 90 it will be faster or slower then that. Least its not 60!
 
From what I have been reading, the GEMS is made by dobec. I have played with alot of dobecs on my ATV's and it's junk. PCIII/V's are way better and easier to use and setup.... Much better consistent readings of the AFR with a PCIII. I would not even bother to use that...
 
kinger said:
At that speed about 10-11 psi. I usually blip the gas and it drops instantly then adjust my speed. Be nice to not have it but its perfect every where else.

Holy crap boost rules!

Right on buddy!!! ;)! Man becarefully those are some VERY scary numbers buddy!!
 


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