Behold! The Griso 1400

[guzzisteve]

That stuff fits better than stock too!! So, when's the next one? You start on it yet? How about a Norge.

[bobrebos]

Nice.  Simply a very nice looking bike!   

[oldbike54]

I'm not angry, I've just been in a very bad mood for 50 years!   

 No comment 

 Dusty

[rdbandkab]

Molto bello...

[pete roper]

Well first *Problem* has arisen. It's cracked a breather hose . Not serious but annoying.

Preliminary logging and mapping diagnosis indicates that this engine is going to need considerably more fuel than its 1200 precursor.. It was running lean as buggery when it went home and when I rode it. Once the fueling is sorted it should be much more fun!

Pete

[beetle]

Lean & clean.

[pete roper]

That stuff fits better than stock too!! So, when's the next one? You start on it yet? How about a Norge.

Sorry Steve missed this. The 'Next one' will go into whoever is willing to pick up the tab's bike. I'd like to try a Norge or Sport but my Stelvio's motor is pretty tired, I just don't need any extra oomph though!

Pete

[beetle]

Despite a couple fettling issues, I took it for its first serious logging run today. I first installed a map with more fuel added across the board to reduce the lean running.

Strike me pink! Third gear from 2000 RPM, cracked the throttle wide open. Front wheel leaves the tarmac briefly. A little bit of poo comes out.  Every other run to redline in 3rd gear I had to lean over the bars. It gets very light. I ain't doing it in 1st or 2nd. I don't own enough underwear.

[pete roper]

I can *Just* get rolling air in third on mine but it takes a lot of clutch abuse and the timing has to be impeccable! Sounds like this motor is behaving as we expected. Nothing came flying out @ 8,000! Bonus! 

Pete

[oldbike54]

 Damn fellas , take a bow , this is fun 

 Dusty

[Phang]

does the sacred screw seal need to be broken in this conversion?

it is fine if you guys don't want to reveal it in public forum 

[pete roper]

Good god no!

[Phang]

Good god no!

The stepper motor bleed enough air to keep those big pistons happy at idling, I suppose.

[Chuck in Indiana]

Nothing came flying out @ 8,000! Bonus!

That's generally a good sign. 

ahem, now we know what Charlie Brown has been sitting out in the garden waiting for.
<running and ducking>

[lucian]

Whas uuuup ?

[pete roper]

Well, speaking to Mark last weekend it now looks like it's as close to finished as it will ever be with an inveterate fiddler working the map.

Sounds like a lot of fun, I haven't ridden it yet.

Pete

[beetle]

Big smoothie that can pull down small buildings. All finished now....


Spark plug porn:

[guzzisteve]

Yes, I was wondering also, just last nite. Hope all is well w/Big G.

[lucian]

Awesome!   I am curious if you ended up with anything close to a factory 1400 map , if that even makes sense. Your plug looks a bit richer than either my griso or 1400.  I'm glad it all panned out for you guy's. You must be getting whacked with inquiries from all over the planet and beyond.  Would love to see a video some day of you and Pete doing side by side roll on's .   Or maybe Pete doing a wheelie tutorial.

[Huzo]

Big smoothie that can pull down small buildings. All finished now....


Spark plug porn:

Ummm...
Speaking of porn, that thumb looks damn sore, where have you had that ???

[beetle]

Awesome!   I am curious if you ended up with anything close to a factory 1400 map , if that even makes sense. Your plug looks a bit richer than either my griso or 1400. 

You can't really compare. Cali 7SM maps have three maps per cylinder, plus the three riding map modes. One "main" map, and five correction maps. Effectively 6 maps per cylinder. That excludes MAP sensor correction and temperature correction tables. I'm still try to figure out how they're applied. The 5AM is pretty basic by comparison. Then there's the single throttle body vs dual throttle bodies.   

I'm extremely happy with that plug. About as perfect as it can get.

[beetle]

Ummm...
Speaking of porn, that thumb looks damn sore, where have you had that ???

It's only been split for about 15 years.

[pete roper]

Awesome!   I am curious if you ended up with anything close to a factory 1400 map , if that even makes sense. Your plug looks a bit richer than either my griso or 1400.  I'm glad it all panned out for you guy's. You must be getting whacked with inquiries from all over the planet and beyond.  Would love to see a video some day of you and Pete doing side by side roll on's .   Or maybe Pete doing a wheelie tutorial.

You'll never see me do a wheelie tutorial or even probably a wheelie, not because I don't from time to time but if I was asked to do it on demand I'd almost certainly screw it up or fall off! :D

As for the plug it's very nice, the air/fuel ring is the textbook! This is one of the things that certain other people overlook. If you only pay attention to the EG-AFR and don't actually consider how an individual engine design will work you can end up way off target in terms of the mix and the burn itself can be altered and changed by factors like spark advance and engine speed.

Of course EGA is used! Mark logs data using a WBOS on the road as although more time consuming and more hard work than using a dyno it also allows analysis of what is happening in real riding conditions rather than just taking a few points of throttle and applying load on a dyno. But then those findings are combined with a host of other tests and examinations and plugs are still a vital tool of discovery as they will tell you exactly what is happening inside the combustion chamber, not just in the pipe, which as we've tried to explain before, on the 8V is a somewhat odd environment due the the charge transition issues that affect it, (The same issues that make it such a thirsty pig of a thing!)! Thing is while there may well be a theoretical *Ideal* AFR, (Being very simplistic.) relying solely on EGA is not only naive it won't render the best results!

I've said it many times over the years but it's worth repeating once again you have to look at an engine holistically. They are each and every one of them an enormous melting pot of compromises and trying to look at them and how they work in simple, linear terms is fruitlessly! You have to look at the BIG, overall, picture. Not just one aspect.

Pete

[lucian]

Thanks for the update  and  explanations in terms I can kind of understand.      Stay well !