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A simple map for most VTX's with aftermarket pipes and air filter

35K views 172 replies 55 participants last post by  NDAna  
#1 ·
Hi guys, I trust everyone has enjoyed a fabulous riding season.....I get calls and messages all the time from folks who just can't seem to get their 1800's to run properly after they install pipes and an air filter mod (big gains are to be had here if the flow is right) along with of course a PC3.
After thousands of hrs tuning my VTX 2000cc high compression, Chromeless Cruiser and other 1800's, I'd like to post a very simple map for you to enjoy and share. This map will eliminate all deceleration popping, allow the motor to run much smoother and produce max power. This map is called a "smoothing" map, it effectively turns your FI Honda into a carbed motor.....BTW - There is no need to plug in random numbers all over a PC3 overlay map grid, under acceleration the FI system can't keep up and it will naturally 'smooth the map' on its own, so why not just make it simple. Tried trued and tested, here it is:

0 2 5 10 20 40 60 80 100
500 10 10 10 10 10 10 10 5 0
1000 10 15 15 15 15 15 15 5 0
1500 10 15 15 15 15 15 15 5 0
2000 50 20 20 20 20 20 10 5 0
2500 50 50 20 20 20 15 10 5 0
3000 50 50 50 20 20 15 10 5 0
3500 50 50 50 50 20 10 10 5 0
4000 50 50 50 50 50 10 10 5 0
4500 50 50 50 50 50 50 10 0 0
5000 50 50 50 50 50 50 5 0 0
5500 50 50 50 50 50 50 5 0 0
6000 50 50 50 50 50 50 5 0 0
Note - The 50's are all in the overlay maps 'deceleration curve', you never ride or accelerate there without hitting the rev limiter, so don't worry about it, this extra fuel flow smoothes out the 'on off' throttle condition of a stock FI motor and removes all decel popping by creating a 'too rich to burn' condition in your free flow pipes.
If you've installed aftermarket free flow pipes and an aftermarket free flow air filter or breathing system (BTW this in where the most gains come from on a stock VTX) this map will do wonders for your motor, your riding buddies and the general public! Depending on the degree of your mods adjust the map accordingly - FYI, my beast runs 10-15 numbers higher across the board.
All the best,
Cliff
cliff@randallsearch.com
 

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#2 ·
Thanks for the post on the map this will indeed give many an easier start for their PC3. I love your ride absolutly bad a$# bike you have what cam work did you have done in addition to everything else to get that power out of it?
 
#12 ·
OMG...:shock:.I loaded this afternoon and just got back from a nice little run down the xpressway. What a difference...feels like I have 10 more ponies.

Thanks so much:mrgreen:...and I really like your bike as well.
 
#13 ·
Glad you liked the map, the 2000cc kit was built for me at MotoSpeed in Sweden.........Here's the deal on fueling a motor, it has two power curves. We load her up in the mid range (the torque zone) then we start pulling fuel out as she revs towards her final 'rpm centric' horse power zone. "Rich in the T zone, lean in the HP zone" - simple and proven. Worked just as well on my Muzzy Kawasaki ZX1270, which I tuned 9 yrs ago - makes 200hp at speed.
Cheers,
Cliff
 

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#14 ·
wanna send me that map?

 
#15 ·
Quick follow-up note for folks not so familiar with this mapping stuff. When we produce 'maps' they are really just overlay maps adding to or reducing the fuel flow of the original Honda map in the ECU. My map can't hurt a motor as it only adds fuel, it doesn't take any fuel away, so you cannot run leaner then you're stock Honda map. Just because you see 0's in the high rpm quadrants doesn't mean the motor is getting no fuel, it is, from the stock map, I'm just not adding any more because it's already too rich in most cases......Don't be afraid to try this map if you have aftermarket 'free flow' pipes and an air intake system, it cannot hurt your motor only help it.
Cheers,
Cliff
 

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#17 ·
Many have asked me why the VTX map is rich up top. Simple, the factories have to lean most motors down in the low-mid range to clear the 'emissions police'.....To compensate, they enrichen the map up top where there is limited emissions control.
Cliff
P.S. - The earlier posted sled is my latest passion, it's a 325hp (n2o) 1000cc two stroke Bombardier Mach Z - 150mph ice racer. The thing on the back is a parachute!!
 
#20 ·
No problem sorry for not catching this...........The PC3 used back in 2003 did not have '250rpm quadrant fuel flow over rides', only per 500rpm, that said, you simply apply the next 'upward' number to the 250 opening. In other words - if my numbers call for a change at 2500 from 2000 rpm then you introduce the 2500 number at 2250 etc etc.
Best of success,
Cliff
 

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#22 ·
No problem sorry for not catching this...........The PC3 used back in 2003 did not have '250rpm quadrant fuel flow over rides', only per 500rpm, that said, you simply apply the next 'upward' number to the 250 opening. In other words - if my numbers call for a change at 2500 from 2000 rpm then you introduce the 2500 number at 2250 etc etc.
Best of success,
Cliff
I orginally left the numbers at "0" and the bike ran fine. I really like the map and the bike runs very smooth until I get up around the 3000 + RPM range then I hear a miss that has plagued me for a while, even before the map change. I guess I'll have to so some research to see what may be causing that miss. If you have any suggestions let me know. Thanks again for the map...it's great.:D
 
#23 ·
Hey Cliff,
I know for those that go with after market pipes and air filters/air boxes that fuel economy is not what they are worried about but what MPG could be expected when using this map? If we assume stock is 40mpg, what MPG will this map yield in relation to stock? Will it be way less efficient or only a little less efficient?
 
#25 ·
i have a quick ? on my map list there is one with nothing but 0s in it would it run dont think it would be efeciant though i loaded map above to its kick azz:thumbup: i am also courious about milage also on this map