Build Thread: 999S "4VSBK"

[viva_brasil]

Originally Posted by jumph4x

Very pretty things.

What's the assembly that sits above the intake runners?

Thanks

Not sure exactly what you're referring to, but working from the head backwards:

cylinder head -> intake manifold / runner -> throttle body -> velocity stack with molded injector holder -> injector

The throttle bodies have a metal brace that connect them. The velocity stacks are usually sealed inside the OEM airbox.

[viva_brasil]

Some updates:

Front headlight / gauge holder coming together with the PIAA lights:


Originally I was planning to use the aluminum piece as a mold and make some carbon fiber parts out of it... But on the other hand I'm considering just powdercoating it and using as-is, it's very sturdy. Getting impatient...

Got these extra lights, planning to mount on the sides with the brackets / using the frame tabs for fairings:

Also not as happy with how bulky these are in person... May replace them with something stealthier.

Transferred the 2VSBK bike over to the jig table, got the swingarm mounted. Getting caught up with that one while I wait on final things for the other one...


And I finally got around to making a reinforcement brace / parts tray for the jig, need to weld on the mounting tabs and get some steel sheet cut to put inside it:

[jumph4x]

Injector holder?! Holy hell, isn't that a bit early to be misting fuel? That's hardly injection at that point.

I don't imagine atomizing fuel that far up can possibly be effective. I'd be curious to see what that motor's specific output is.

EDIT: I am disappointed you're not using the steamtrain headlight assembly.

[viva_brasil]

All the superbikes use the same "suspended injector above velocity stack" design: 749/999, 848/1098/1198, and the panigales... Outputs range from 120ish for the 749 and up to 200.

Edit: forgot to comment on the headlight. That blob is the most plastic-looking metal lump of shit I've ever seen. I was considering doing a metal tubular frame for the projectors, but the cast aluminum on those is junk too... So fastening them down would require a lot of work and didn't feel right with the rest of the bike. Biggest issue with the stock headlight housing is how far forward it protrudes because of the fairing design.

[viva_brasil]

Slightly unrelated, but relevant... happened to be reading about this car today and noticed the super special motor has the same "injector suspended above velocity stack" design... which I learned is referred to as a "gantry fuel injection", and here's some commentary:

The new motor has a gantry fuel injection system, which has the injector nozzle as far upstream of the intake port as possible. This gives the fuel time to atomize while being tumbled in the natural turbulence of the intake tract. With a whopping redline of 10,200 rpm, the engine inhales a huge volume of air and injects the fuel upstream, giving the fuel a much better chance to create an even air/fuel mixture. In theory, an upstream injector cools down the intake charge to make a denser mixture with oxygen resulting in more power—in Billy's case, about 10 additional ponies.

[viva_brasil]

Some updates - almost done....

Working on the gauge and headlight mount:


Eye safety is of top concern:


Everything mounted up - PIAA lights with some extra LEDs, designed this to be super visible on sunny days for splitting. The PIAA lights are on their own circuit - powered up when ignition is turned on, will likely leave them on so they turn on whenever the bike is on. The LEDs are wired to the high beam, but the PIAA lights stay on when high beams are on, so I can flash them and keep them on.


Another angle:


I'll likely powdercoat the mounts black and add a X-brace type reinforcement for the front mount.

Final exhaust mock-up for the mounting tabs:


I fired it up and it sounds incredible. The pod filters are interesting, can hear what the injectors are doing - sounds like they give a little spritz of fuel after the fuel pump primes - kind of like spraying starter fluid in your intake... Mufflers actually pretty effective, thought it would sound basically the same as open headers, but it's very much tolerable with the mufflers on.

[viva_brasil]

Couple more before wrapping up today:



And the chain side:

[Blankpage]

Do those covers stay on over the headlights?

[viva_brasil]

They're removable and seem quite secure when on.

[Johndicezx9]

Bravo, sir... BRAVO!

You made the 999 "desirable"!

[NoneMoreBlack]

Originally Posted by viva_brasil

The pod filters are interesting, can hear what the injectors are doing - sounds like they give a little spritz of fuel after the fuel pump primes - kind of like spraying starter fluid in your intake

Almost sounds like an FI version of an accelerator pump.

[viva_brasil]

Originally Posted by Johndicezx9

Bravo, sir... BRAVO!

You made the 999 "desirable"!

Thank you sir

Finished up tacking the exhaust tabs today - off to the welder this week.





Once that's done will plan to do some test rides and then remove the aluminum parts to powdercoat and take the exhaust off to get wrapped.

[viva_brasil]

Made a little bracket for the tail light / license plate, will get this powdercoated with the other aluminum bits:





Also picked up some aluminum rod to weld up an x-brace for the front mount - should reduce vibration and make it look a little more robust.

[FreeRyde]

I was all hard and aroused, then I saw the nasty clipon's.

Now I am disgruntled and turned off.

[Maddevill]

Are you going to wear asbestos soled boots? Exhaust may fry your feet....