Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Flat spot between 2500 and 3000 revs.
#1
Hi There
I
have just installed a Staintune muffler. Really nice visually and sounds great.I have a flat spot around 2500 revs. I have been told that that is common with big capacity four cyl engines as that is where emission levels are taken and they map them lean. I am thinking of installing a power commander to remedy this. I must add that you could probably live with the problem but correcting it would greatly enhance the ride.
Thanks
Garry
Reply
#2
(06-16-2015, 06:43 AM)Garry Richards_imp Wrote: Hi There
I
have just installed a Staintune muffler. Really nice visually and sounds great.I have a flat spot around 2500 revs. I have been told that that is common with big capacity four cyl engines as that is where emission levels are taken and they map them lean. I am thinking of installing a power commander to remedy this. I must add that you could probably live with the problem but correcting it would greatly enhance the ride.
Thanks
Garry

According to DynoJet:

"...on some models if you are above 2250 rpm and under 30% throttle position, the stock system will gradually and temporarily lean out the air fuel ratio in an attempt to achieve an air/fuel ratio of 14.7:1 (stoichiometric)."

Therefore, a Power Commander may be just the ticket for you to add more fuel in this range. However, you may want to try the cheaper approach using an O2 Lambda Sensor Eliminator first without the Power Commander. Power Commander provides one of these with their complete kit, but you can get one separately to try it out first.

Here is the link to a good eliminator which also provides a good explanation of how it works:

[url=http://www.ebay.ca/itm/o2-Oxygen-Lambda-Sensor-Eliminator-Set-Blanking-Plug-HONDA-CB-1100-2013-2014-/221639679815?pt=LH_DefaultDomain_3&hash=item339ac11f47&vxp=mtr]http://www.ebay.ca/itm/o2-Oxygen-Lambda-...47&vxp=mtr
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  Front Tyre wearing flat across centre Davidjill 8 957 05-29-2025, 07:24 PM
Last Post: Davidjill
  High engine revs on start up CBX1000_imp 21 1,192 06-06-2024, 02:40 AM
Last Post: Charlie Bravo_imp
  flat repair. ‘17 CB1100 EX sleeper_imp 15 773 08-29-2022, 06:31 AM
Last Post: Cormanus
  2014 CB1100 - rotational vibration/wobble - flat spots in tires? rozbabbo1100_imp 7 381 08-04-2022, 10:10 AM
Last Post: 1973cb750
  my new pr3 has a flat spot max 9 493 12-30-2021, 03:53 AM
Last Post: pekingduck
  2017 CB1100ex / Flat tire issue and save Senna02_imp 27 1,290 07-19-2021, 08:28 AM
Last Post: Gone in 60
  Flat Tire I am Stumped!!! holy666diver_imp 25 867 05-29-2017, 11:28 PM
Last Post: curlyjoe_imp
  2500 RPM Just feels lean. quail_imp 16 678 07-28-2016, 08:18 AM
Last Post: Rolls_imp
  Perhaps a sprocket change for lower revs? meowguy_imp 17 617 09-26-2015, 10:10 PM
Last Post: Lord Popgun
  High revs after re-fueling. Tezza_imp 12 952 08-07-2015, 03:29 PM
Last Post: Cormanus

Forum Jump:


Users browsing this thread: 1 Guest(s)