[Ando]

What a guy!

Your wideband will probably still read correctly even if you botch it and create an exhaust leak... just sayin. Only way to learn is to practice, sometimes that results in failure, no big deal. I believe in you!

 

[Ando]

Nice write up.

You had me on the edge of my seat thinking you were going to bite the bullet and weld-er-up! I'm diggin that print in your garage directly in front of your Z in the first shot.

Bummer that our open/closed ECU communication nonsense isn't as straightforward as the Grom guys. I read through that thread you linked and almost bought an EFIE before I remembered "this isn't our bike... this isn't actually relevant."

What would it take to augment your wideband to log AFRs like the grom thread with the bazzaz? That seems like it would be a very useful tool for this process. Start a go-fund-me to buy the crap and I'll support you. XD

 

[Ando]

...and I would only have AFRs, not throttle position or RPM so not sure how useful it would be.

Oh right, derp.

Sounds like you are making good progress. The ultra rich WOT is kinda odd, I like Honda's system of extrapolating the closed trims into the open territory.

I wish the tuning world weren't so hush hush, it would be cool to hear from some of those guys on what they found in the Kawi ECU that surprised them, what they wanted to fix, etc.

Because, while we appreciate the work you are doing, it's been done before in parallel by multiple companies. So, we could keep the actual tuning secretive but share knowledge of the OEM configuration. In theory that would lower everyone's development cost, but who's going to be motivated to put in the initial work? Open source stuff is so nice... in theory. Just like communism.

 

[Ando]

My only major gripe, after determining that there is basically zero risk of running lean (stock) at WOT is the lean surges you get occasionally around 5-6k RPM with throttle just cracked.

Agreed, that's the big WTF floating around in my head after your first trials.

 

[Ando]

Appreciate your write-ups. You must be an engineer when you aren't hooning around the coast on mini bikes. This is sounding more and more promising.

OT: If it weren't a heavy/awkward PITA to ship I'd like to try your Kaw'ee mod'd exhaust. I've been trying to think of ways to make a non-permanent hole (not technically my bike) in the left side of chamber #1.

 

[Ando]

Whelp! You know what they say about as suming. -_-

Despite it being heavy I actually like the OEM vanity exhaust exit, which is why I want to make the hole on the other side. From what I remember the exhaust goes through both cats before hitting expansion/baffling chambers. Someone (probably kaw'ee) drew a crude representation of the inside of the OEM muffler.

The inner exhaust "tip" goes through chamber #1 at the very back of the can and connects to chamber #3. Removing it allows gas and sound to skip 2/3 chambers.

And yeah, I'd probably just do it... but it's not technically my bike and wifey won't even let me plastidip it purple, I imagine she'd be pissed if I tripled the volume without consulting her!

(Ugh, I gotta stop derailing topics. I'm interested to hear how the bike feels with your new mods, be sure to show off your DIY intake!)

 

[Ando]

Hey Kaw'ee, that's nearly exactly what I was thinking! Not sure on efficacy on a vibey bike though. Maybe the exhaust is isolated enough.

 

[Ando]

I'm starting to err on the side of "ask forgiveness" and do it over the winter.

"Yeah, it always sounded like that..."

 

[Ando]

Hey @MrEvilpirate, sounds like you had a big weekend with intake and exhaust.

In summary from other threads:

You're too feckin' old, the Zoom is too loud for you... So is your pod filter...

Suck/Blow mods completed, ears plugged, and butt dyno calibrated. Result? More power, AFRs happy. Success!!!

So the EFIE is a good idea for intake/exhaust simpletons who want to pinch pennies and keep their engine happy. Right?

I appreciated your observation that with just the exhaust and the stock airbox very little power improvement is made, but consequently you also aren't going to have dangerous lean conditions because the intake is still so restrictive. I am curious if the opposite is also true.