Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
Sponsored by:
Sponsored by:

PV Auto Tuning Map Question

Thread Tools
 
Search this Thread
 
Old Mar 1, 2021 | 06:43 PM
  #1  
SoCaRider's Avatar
SoCaRider
Thread Starter
|
Road Captain
Joined: Feb 2020
Posts: 615
Likes: 209
From: California
Default PV Auto Tuning Map Question

Hi for you pros out there been working on correcting my tune what do you think about the VE tables after auto tunning around the 3500 rpm range the scale is pretty high and I had to cap a couple of cells.?
Thanks .


 
Reply
Old Mar 1, 2021 | 06:59 PM
  #2  
Quik's Avatar
Quik
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
Default

Looks like too much work, I would just put it on a dyno and let a pro handle it, LoL
 
Reply
Old Mar 1, 2021 | 09:31 PM
  #3  
TOFTS's Avatar
TOFTS
Tourer
Joined: Aug 2015
Posts: 433
Likes: 67
From: NOR CAL
Default

You might ask in the tuning section https://www.hdforums.com/forum/ignit...-injection-55/
 
Reply
Old Mar 1, 2021 | 09:57 PM
  #4  
hattitude's Avatar
hattitude
Seasoned HDF Member
15 Year Member
Community Builder
Community Favorite
Top Answer: 10
Joined: Sep 2008
Posts: 14,156
Likes: 11,247
From: San Diego, CA
Default

Originally Posted by SoCaRider
Hi for you pros out there been working on correcting my tune what do you think about the VE tables after auto tunning around the 3500 rpm range the scale is pretty high and I had to cap a couple of cells.?
Thanks .

You're only talking 4 cells. One in the decel area (3500 rpm @ 20KPa) and three in the medium load area (3500 rpm @25, 30, & 40 KPa)



I'd cap them..

From Fuelmotos's web site:

Q)What is Cap or Scale and what should I select?

A) When you export your learned corrections with Auto Tune and it asks you to cap or scale this means that there is a cell or cells in the VE tables that are at or have exceeded the high limit of the VE table of 127.5. If you select Cap it will “cap” the cell(s) at 127.5 and correct the rest of the VE tables based on your Auto Tune data. If you select Scale it will raise the displacement constant (cubic inch) within the calibration and then normalize (lower) the VE tables. Choosing Cap or Scale will depend on not only the amount of cells that are maxed at 127.5 but also the load range they are located. If you have only a single cell or small cluster at 127.5 in most cases we would recommend capping, especially if the cells are in the lighter load or decel area. If you have a large cluster of cells that are maxed or of they are in the higher load or WOT areas you may need to select Scale. Some important considerations when scaling; you will want to have as much data as possible before selecting scale as the entire VE table will be changed and normalized for the difference in displacement. In some cases depending on the amount of correction and the data itself it may scale excessively, this can result in an abnormally high displacement constant and abnormally low VE tables. Generally speaking, most scaled maps on mildly modified motors should be within 10-15 CI of the actual engine displacement, however it not uncommon on extensively modified motors to end up the CI in the 140-150 range.
 
Reply
Old Mar 1, 2021 | 10:31 PM
  #5  
SoCaRider's Avatar
SoCaRider
Thread Starter
|
Road Captain
Joined: Feb 2020
Posts: 615
Likes: 209
From: California
Default

Yes I did cap them ^^^ just wondering what you guys thought about the map?
Thanks for your input above.👍
 

Last edited by SoCaRider; Mar 1, 2021 at 10:40 PM.
Reply
Old Mar 2, 2021 | 01:56 PM
  #6  
Issysportster's Avatar
Issysportster
Tourer
5 Year Member
Photogenic
Liked
Joined: Aug 2019
Posts: 273
Likes: 151
From: Colorado
Default

Didn't give us much info, but here's mine:


This is a 107, S&S 475C, combo of dyno tuning and wideband tuning, V&H power duals.

Tuning is much more difficult than looking at VE's. They are a result of many other things, and should never be copied from one bike to another, especially as sloppy as Harley's tolerances seem to be.
 
Reply
Old Mar 2, 2021 | 06:53 PM
  #7  
SoCaRider's Avatar
SoCaRider
Thread Starter
|
Road Captain
Joined: Feb 2020
Posts: 615
Likes: 209
From: California
Default

Originally Posted by Issysportster
Didn't give us much info, but here's mine:


This is a 107, S&S 475C, combo of dyno tuning and wideband tuning, V&H power duals.

Tuning is much more difficult than looking at VE's. They are a result of many other things, and should never be copied from one bike to another, especially as sloppy as Harley's tolerances seem to be.
Yes I have been trying to get my tune correct now for several months ,not a hole lot of info out there other than bits and pieces, going to half to go for a Dyno tune.
Thanks for posting114 S&S 475c S&S 2-1 exhaust high flow air cleaner.
​​​​​
 
Reply
Old Mar 4, 2021 | 01:02 AM
  #8  
SoCaRider's Avatar
SoCaRider
Thread Starter
|
Road Captain
Joined: Feb 2020
Posts: 615
Likes: 209
From: California
Default

Originally Posted by Issysportster
Didn't give us much info, but here's mine:


This is a 107, S&S 475C, combo of dyno tuning and wideband tuning, V&H power duals.

Tuning is much more difficult than looking at VE's. They are a result of many other things, and should never be copied from one bike to another, especially as sloppy as Harley's tolerances seem to be.
Just curious if you did your wide band tunning before or after your dyno.
I'm running wide band and do Target Tune on the PV. Thanks
​​​​​​
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Mar 4, 2021 | 07:52 AM
  #9  
Issysportster's Avatar
Issysportster
Tourer
5 Year Member
Photogenic
Liked
Joined: Aug 2019
Posts: 273
Likes: 151
From: Colorado
Default

Originally Posted by SoCaRider
Just curious if you did your wide band tunning before or after your dyno.
I'm running wide band and do Target Tune on the PV. Thanks
​​​​​​
Started with the Fuel Moto tune on the PV I bought. It was terrible. Rather than spending a ton of time on the road experimenting, I took it to a local reputable dyno tuner. Bike ran much better, but real world riding is very different from dyno tuning. Bought the Harley wideband kit (was less expensive than target tune), and fine-tuned it myself.
 
Reply
Old Mar 4, 2021 | 09:28 AM
  #10  
SoCaRider's Avatar
SoCaRider
Thread Starter
|
Road Captain
Joined: Feb 2020
Posts: 615
Likes: 209
From: California
Default

Originally Posted by Issysportster
Started with the Fuel Moto tune on the PV I bought. It was terrible. Rather than spending a ton of time on the road experimenting, I took it to a local reputable dyno tuner. Bike ran much better, but real world riding is very different from dyno tuning. Bought the Harley wideband kit (was less expensive than target tune), and fine-tuned it myself.
Ok sounds like a good balance that way.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
doug62
Touring Models
11
Apr 18, 2020 10:47 AM
Pudge211
Ignition/Tuner/ECM/Fuel Injection
2
May 3, 2016 10:26 AM
keno
Ignition/Tuner/ECM/Fuel Injection
7
Apr 23, 2014 04:59 PM
pmcburne
Touring Models
2
Sep 30, 2009 01:34 PM
Spike_96
Ignition/Tuner/ECM/Fuel Injection
15
Aug 9, 2008 09:36 AM




All times are GMT -5. The time now is 04:42 AM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE