[Alka panwar]

Just came back from 100km ride in hilly twisties.
Haridwar- Rishikesh- shivpuri- jollygrant - haridwar.

[Alka panwar]

So the weekend is here! Few more things need to be sorted on the bike.
Horn- horn was installed where I have placed the turbo, so it needs an alternative location. Poon-poo
Intercooler is rattling like crazy, some 3m double sided tape is in demand.
Primary chain is so loose, you can feel it jerk at every throttle change, need to be adjusted. Don't know when it was done last time.
Power vision tuner needs to be placed somewhere, preferably on handlebars, currently it sits in a phone mount.
Some more riding and tune refinement, I would call the current level to be good 90% on VE( volumetric efficiency) and 50% on boost spark timing.
Hopefully 2 days will be enough to get these things done.

[Alka panwar]

Just the things people do with Turbos to kill time.

https://youtu.be/ojhbycW0DAU

[Alka panwar]

Just for the love of Turbo Fluttering sound. Headphones recommended. This run was just 4 psi, trying to correct spark timings for optimum. All other parameters, bike is doing extremely well. In city kmpl as high as 19, highway 24 @100kmph

https://youtu.be/-wqRFELow5M

[Alka panwar]

First 1000km completed. Initial 400-500 went into tune itself so not much of fun there.
Absolutely beautiful riding experience. Tons of pulling power/ acceleration.
Lag is minimal till 3rd gear( as revs rise fast enough for you to not notice), 5 and 6th gear, lag is about . 8-1 sec ( not measured), Definitely experienced if accelerating form low rpms like 1600-1800. If you open the throttle from cruising speed like 80-90 in 6th gear, it definitely takes some time, seems like system is processing something, app hanged.
But then it builds, builds and keeps on building that acceleration.
In most bikes as the speed increases, the acceleration gets slower and slower. Like when it was NA, it would get to 100 quite fast and sort of scary fast, 100-130 also fast and exciting. 120-150, slowly building, beyond 160 it was like keeping wot for quite a long time and it will reach 190-200 or thereabouts sometime in future.
Now it goes from 100-120 like ok fast in 6 gear but then it builds this maniac fit of rage. You look at 120 and then try to look where you are on the road and again look at speedo and it's already past 170-180. It's pretty much same awesomeness that you get accelerating from 40-100 in 3rd gear in non turbo stage 1 fat Bob.
It has been an awesome undertaking till now, definitely makes more power if you pour in higher octane fuel.
This one is a keeper.

[ssjr0498]

Awesome work!! For the lag part, how are you on the ignition values for that area of your load map? Is there scope to bump it up slightly? It might just give you that extra oomph you're looking for!

Originally Posted by Alka panwar

First 1000km completed. Initial 400-500 went into tune itself so not much of fun there.
Absolutely beautiful riding experience. Tons of pulling power/ acceleration.
Lag is minimal till 3rd gear( as revs rise fast enough for you to not notice), 5 and 6th gear, lag is about . 8-1 sec ( not measured), Definitely experienced if accelerating form low rpms like 1600-1800. If you open the throttle from cruising speed like 80-90 in 6th gear, it definitely takes some time, seems like system is processing something, app hanged.
But then it builds, builds and keeps on building that acceleration.
In most bikes as the speed increases, the acceleration gets slower and slower. Like when it was NA, it would get to 100 quite fast and sort of scary fast, 100-130 also fast and exciting. 120-150, slowly building, beyond 160 it was like keeping wot for quite a long time and it will reach 190-200 or thereabouts sometime in future.
Now it goes from 100-120 like ok fast in 6 gear but then it builds this maniac fit of rage. You look at 120 and then try to look where you are on the road and again look at speedo and it's already past 170-180. It's pretty much same awesomeness that you get accelerating from 40-100 in 3rd gear in non turbo stage 1 fat Bob.
It has been an awesome undertaking till now, definitely makes more power if you pour in higher octane fuel.
This one is a keeper.

[Alka panwar]

Originally Posted by ssjr0498

Awesome work!! For the lag part, how are you on the ignition values for that area of your load map? Is there scope to bump it up slightly? It might just give you that extra oomph you're looking for!

On spark advance, I started conservative and then increased the values by 2* in the range I was tuning till the ecu detected knock events. I reduced the timing by 1.5-2*c wherever the knock was detected and extrapolated in nearby areas.
So i would say I am pretty much near to values where it would start knocking. However at that time afr was not in 1:12 range, now it is.
May be i will give the spark timings a bit of stick again and see how long 1:12 suppresses knocking and if it helps spool up times a bit. Thanks for suggestion.

But otherwise it is running fantastic, I have a 3-4 day tour planned soon, will have plenty of time and road for experiments.

[ssjr0498]

I haven't tuned bikes, however, tuned cars (petrol) extensively! Wanted to ask isn't 12:1 too rich for your bike? Maybe its the head design of the harley that might not be giving you the confidence to go leaner!

But on Japs, off idle, very light throttle to 30% throttle and cruzing, I generally hover around the 15:1 to 13.8:1 mark and never before have I gone richer than 12.8:1 and that too on a cammed racecar with pretty high compression for the motor!

Again, hats off to your perseverence and efforts, I am sure everytime you whack that throttle open, you must be having a super wide grin!

Originally Posted by Alka panwar

On spark advance, I started conservative and then increased the values by 2* in the range I was tuning till the ecu detected knock events. I reduced the timing by 1.5-2*c wherever the knock was detected and extrapolated in nearby areas.
So i would say I am pretty much near to values where it would start knocking. However at that time afr was not in 1:12 range, now it is.
May be i will give the spark timings a bit of stick again and see how long 1:12 suppresses knocking and if it helps spool up times a bit. Thanks for suggestion.

But otherwise it is running fantastic, I have a 3-4 day tour planned soon, will have plenty of time and road for experiments.

[Alka panwar]

Originally Posted by ssjr0498

I haven't tuned bikes, however, tuned cars (petrol) extensively! Wanted to ask isn't 12:1 too rich for your bike? Maybe its the head design of the harley that might not be giving you the confidence to go leaner!

But on Japs, off idle, very light throttle to 30% throttle and cruzing, I generally hover around the 15:1 to 13.8:1 mark and never before have I gone richer than 12.8:1 !

1:12 is only in high kpa/boosted region. Off throttle/light load regions (till60kpa) are running 14.2-14.6 range.
Also factory tune already had 12.5 afr in 90 and 100kpa column as original tune.
Harley dishes out 12.xx afr in high speed/load areas
From factory itself because they know people are going to put in all sort of intake and exhaust upgrades and never bother changing the tune. So that covers up 10% or so air flow improvement by such changes and not go catastrophic lean. Although everyday sedated riding will still happen in areas that are 14.6 from factory if exhaust or intake is upgraded.
Also higher afr (up to a certain point) cools the charge due to latent heat of vaporization of petrol and charge dilution due to heat is minimised. Charge dilution is a big factor with Intake manifold being placed in between two air cooled big displacement cylinders on these motorcycles.
Only reason I can think of for running any leaner than 14.6 is for economy, but these being air cooled, they get overheated quite fast when lean.

[Alka panwar]

Exciting night! Don't know how will i sleep, looks like 2 extra cans will be drained just to sleep
Going for a bike trip to mountains tomorrow morning 6am. Hope to reach Haldwani by 10-11 am. Then on all twisties and mountains.
It has been 4 years for a proper bike ride, largely due to covid .
Will also do a comparison between riding relatively lighter Sportster in mountains and a fat Bob (320+78kg myself).
Over the years 2013-2019 I have absolutely enjoyed Sportster in hills and himalayas, flickable, stable and predictable. Most if it's 44000 km have come about in twisties, absolutely loved it .
Let's see how much bigger and heavier fat Bob likes some of the world's highest roads.

[Alka panwar]

https://youtu.be/nhRCBuBkx9s

[Alka panwar]

Four day trip, bikes buddies and beauty.
4km walking trail in jungle to reach an almost abandoned village with 18 houses and only 7 people present in whole village. Somewhere 80km from Ranikhet.



This blue house was our two day home, century old construction with stone walls and open fire cooking.


3 days and some 900km of good weather and fun times.

[Alka panwar]

What did I tell you, riding in mountains is 100x kilometres.
One mistake and curtains.

https://youtu.be/e5P8PHDsEZk

[Alka panwar]

More heart trouble! Old ticker wants to stop. I just keep getting parts replaced.
Anyway, got hold of a bunk selling 100/99 octane.
Thinking of doing a max/12psi acceleration test for acceleration and gather some data about it. Probably sunday

[Alka panwar]

And now the battery is dead! Absolutely stupid crank1 battery, dead on 1year and 6days. I anyway did not have the battery purchase receipt so getting it changed in warranty was always going to be uphill. I have heard that these crank1 usually lasts only about 1year or so.
Have asked Foothills HD if they have new unit in stock, let's see.