KLX300 - "Unmuzzled" Power Charts Needed.
#111
You know, it's potato and potatoh.. What he left with did in fact produce the improvements over the blue power curves on run 1 ( Run 1 is what is shown on his chart for blue power curves) ..
All I am saying is a simple FYI for the membership - the delta between a "before and after" on a dyno tune from a typical shop cannot usually be trusted.
And BTW, the charts I've posted in here are ALL showing "best run" on all power curves.
All I am saying is a simple FYI for the membership - the delta between a "before and after" on a dyno tune from a typical shop cannot usually be trusted.
And BTW, the charts I've posted in here are ALL showing "best run" on all power curves.
Last edited by Klxster; 07-18-2022 at 06:06 PM.
#112
I have a 2023 300 ds with full barker exhaust djfc from barker .it has there tune tuned for lidless set up runs great. Deleted pair also. Wish there was a way to add more timing like the early Australian models had 40 degrees i believe it would be 30+ hp if you could add 10 degrees
Last edited by Kris250; 01-01-2023 at 03:14 PM.
#113
Testing different timing schemes has been done - by me.
The Aussie scheme causes significant power loss on the lidless setup for Carb'd KLX250's compared to the stock scheme. In fact, no significant power increase was able to be found in the upper 1/2 rpm range over the stock scheme.
Nominal power increases in upper range were found in the 27 degree (total advance) range compared to the stock 25 degrees.
I assume you've removed the computer controlled secondary throttle valve. If not, then that's your next move for increased performance.
The Aussie scheme causes significant power loss on the lidless setup for Carb'd KLX250's compared to the stock scheme. In fact, no significant power increase was able to be found in the upper 1/2 rpm range over the stock scheme.
Nominal power increases in upper range were found in the 27 degree (total advance) range compared to the stock 25 degrees.
I assume you've removed the computer controlled secondary throttle valve. If not, then that's your next move for increased performance.
#114
I removed that today and it does seem more responsive. Thinking about take it to the dyno to see if the fueling is correct. Btw my 250 rev 10500rpm with ease this 300 seems to go to 9000rpm
Last edited by Kris250; 01-07-2023 at 01:12 AM.
#115
Just got bike back from Dyno
I did most of the things suggested in this form cheap slip on restrictor throttlebody removed EJK w/o2 delete, rubber air box thing pull out, pair valve delete ,EGR delete, and after a long test ride I noticed a VERY blue spot on header (after programming some base ejk settings mentioned in this thread) I decided to take the bike to a local Dyno shop to tune the EJK. And my bike was very lean they said. In the picture the top settings are my doing. And the bottom numbers are from the Dyno shop.. maybe this helps someone. Or if it blows up we can have something in common. Jk … lol
#116
I did most of the things suggested in this form cheap slip on restrictor throttlebody removed EJK w/o2 delete, rubber air box thing pull out, pair valve delete ,EGR delete, and after a long test ride I noticed a VERY blue spot on header (after programming some base ejk settings mentioned in this thread) I decided to take the bike to a local Dyno shop to tune the EJK. And my bike was very lean they said. In the picture the top settings are my doing. And the bottom numbers are from the Dyno shop.. maybe this helps someone. Or if it blows up we can have something in common. Jk … lol
I have done all the same things to my KLX, with the addition of a FMF Mega Bomb head pipe and I'd be interested to see some numbers if you have them.
Thanks again!
dankly
#117
If the shop did not tell him, or provide a chart, for his new fueling, I can say with confidence that they put him at 13 - 13.2 at WOT.
Dyno tuners do not understand AFR burn rates, the connection between the ignition scheme and the operating AFR, or any other deep knowledge about ICE.
They use prevailing dogma as targets for tuning - I believe they get their target AFR from the fact that the Dynojet software on their dyno's has a default position of the red AFR target line of just over 13:1
So, lean WOT fueling is the norm and expected.
12.6 - 12.8 is the correct WOT AFR in most cases.
Dyno tuners do not understand AFR burn rates, the connection between the ignition scheme and the operating AFR, or any other deep knowledge about ICE.
They use prevailing dogma as targets for tuning - I believe they get their target AFR from the fact that the Dynojet software on their dyno's has a default position of the red AFR target line of just over 13:1
So, lean WOT fueling is the norm and expected.
12.6 - 12.8 is the correct WOT AFR in most cases.
#118
Reply
Thanks for posting this! Did they tell you what air/fuel ratios this gave you? Did they give you a printout that shows HP and torque?
I have done all the same things to my KLX, with the addition of a FMF Mega Bomb head pipe and I'd be interested to see some numbers if you have them.
Thanks again!
dankly
I have done all the same things to my KLX, with the addition of a FMF Mega Bomb head pipe and I'd be interested to see some numbers if you have them.
Thanks again!
dankly
I’ll try to post that video link in here
Last edited by JhHad2; 04-12-2023 at 03:05 AM.
#119
Please share any other observations you might remember.
Just the fact that you saw a very flat line is extremely important - it means they were able to create stable fueling at WOT.
Your list of worries are unfounded - forget them.
Just the fact that you saw a very flat line is extremely important - it means they were able to create stable fueling at WOT.
Your list of worries are unfounded - forget them.
#120
Everyone with a newer EFI bike needs to watch that video and capture the data presented.
I will provide information as I work thru the vid.
1. He should not be running pulls on the bike with the seat removed - only "seat on" testing provides accurate testing.
2. As I note in a post above, he has left the target AFR ( red line ) on its' default setting of approx 13.1 : 1 - As usual, it does not look like he knows enough about AFR to know that 13 or more is too lean for WOT ops.
3. His vid becomes very unclear on what he is doing to the airbox and when.
I will provide information as I work thru the vid.
1. He should not be running pulls on the bike with the seat removed - only "seat on" testing provides accurate testing.
2. As I note in a post above, he has left the target AFR ( red line ) on its' default setting of approx 13.1 : 1 - As usual, it does not look like he knows enough about AFR to know that 13 or more is too lean for WOT ops.
3. His vid becomes very unclear on what he is doing to the airbox and when.
Last edited by Klxster; 04-12-2023 at 07:32 PM.