damic

looks like this: Honda S2000 Sports Injection Kit / 50mm Throttle Body / 63mm Trumpet - Sports Injection - TODA Racing USA / MISANO Motor Sports, Inc.

BLUE TII

iTrader: (9)

OBX-R S2000 throttle bodies work well, are quite adjustable and 1/3 the price.
Gotta ditch the OBX-R TPS though we found and put a proper BMW Bosch one on.

A quick search showed OBX-R S2000 one is 50mm TB and K24 one is 52mm TB and cheaper. Hmmmn.

blackedoutFC3S

iTrader: (7)

That setup makes 550 rwhp? What else is done to it?

damic

Read the article: FEATURE - YUKI KAMAKURA'S QUAD ROTOR 26B POWERED FD3S | 7TUNE

RCCAZ 1

iTrader: (10)

Wow.... just WOW!

One interesting quote from the article...

"One really neat party trick that offers some increased milage comes thanks to a little dash mounted switch that cuts fuel to two of the rotors, thereby extending not only engine life but range. The difference to drivability and noise production is night and day. One little switch seemed to turn the FD3S from an axe-wielding murderer into a playful kitten"

Wonder how that works? I'd imagine they are cutting rotors 1 and 3, or 2 and 4? Do the conversion guys. 1080 Kgs = 2380 lbs! Insane!

Mushiki

I'd say it depends on the design of the e-shaft. It would leave running the rotors that are "facing each other", like in a standard 2 rotor.

Rub20B

Where they really thinking the water pump wasnt going to slip with that belt design? Also they state they use RX8 rotor housings. So either they converted them to PP exh port or the 2 middle rotors are stuck with these really restrictive exh ports in the narrow intermediate side housings.

Ainis

Also they say, that they use rx8 rotors and rx8 apex seals. How rx8 seals works with peripheral port, as they are shorter in height?

Mushiki

That's probably the reason why the engine life is just 20k~30k miles...

I seriously don't get it, most people who go 20B/26B NA do it for "the power of a turbo engine, with the reliability of a NA one"... this engine is 40k USD, develops 550whp (not that hard on a turbo 13B...), and has a short life span

j9fd3s

iTrader: (3)

but its COOL

silentblu

iTrader: (1)

Kids 20, and can achieve that, he's probably going to stick a 6 rotor in there after the 4 rotor goes.

Coinshark

patiently awaits for the next amaze update

GeenIdee

Patience?


....I ran out

John Huijben

iTrader: (1)

Sorry guys, it looks like there won't be any updates in the near future, since I'm currently helping a few buddys with their cars, and I bought a house which needs work. I have recieved the MS3 from diyautotune, and I've sold my old radiator and sourced a pair of cooler cores and a large 3mm plate of aluminium. To be continued

Andrej STIEVOGTR

Do you consider selling engine? I have an FD to put it in.

JDP6693

iTrader: (1)

I doubt with all the dedication, time and effin amazing customization in this build that he'd be willing to just up and sell it before he even gets to break it in fully. But that's just me.

Black and Blue RX

To build a proper 4-rotor, you need dedication.
And experience but that's just me sitting here and just comment without even know how to install a light bulb.
I mean, it's a waste not to finish this build...
I think everybody agrees on that one.
But hé! There are so many things that looks interesting when you have that age!
C'mon John, you ow it to us!

TRINIREX72

Awesome build, it looks it will be quite the road hammer when done.

Syscrush

I'm not very active here, but I like to lurk now and then to see what people are up to.

This thread is the first in a very long time that I not only read start to finish, but that I felt compelled to post on. Amazing work.

In one thread, you've done the improbable (a "home built" 4-rotor), and the impossible (make me lust for an FC!!!).

bdarepat

Hi John,

Are you planning to go to Rotarystock at Lelystad on Saturday, 11th July?

There are about twenty of us from the UK Mazda Rotary Club going and it would be great to meet you!

pippin89

Wow John. I have been following this in the background for some time and have read through it from start to finish at least twice. Your skills are incredible. I do a similar line of work although more computer/solidworks based. I don't get to do the hands on stuff as often as I would like. How you had the guts to start the eccentric machining on the E-shaft I will never know. I would still be there measuring and making sure I had got it right! Looking forward to the next instalment of where you take this amazing build next!

LargeOrangeFont

iTrader: (7)

That's pretty much why people put V8s in these cars.

BLUE TII

iTrader: (9)

perlhaqr

I DID IT! I READ THE WHOLE THING!

Man, John, this is an amazing thread. I kinda want to fly to the Netherlands just so I can buy you a beer. Sadly, I totally can't afford that, so... if you're ever in Albuquerque for some strange reason...

Out of curiosity, how long is the engine, nose to tail?

Also, I know you said you wanted to get away from the slide throttle, but have you considered a throttle plate made of UHMW? You were talking about the tendency to gall as a concern for dropping your clearances, but UHMW wouldn't have that problem. Alternatively, you could do something like oil-impregnated bronze (AKA "Oilite") which might let you put O-rings in the outer intake plate, which would be less likely to drag and roll when the throttle plate was sliding under them, because they'd be lubricated.

Or, yeah, you could just go to butterflies, which also look cool.

Single large oval butterfly under the air filter, into a plenum, into the individual runners? You could even put air horn velocity stacks inside the plenum at that point.

Captain Hook

iTrader: (1)

Subscribed. I wish I had grown up around stuff like this, I'm in school for comp sci and this makes me want to take a year off and just learn. Haven't machined anything since high school, and nothing as precise as anything in this thread. You're amazing, your motor is amazing, holy wow. I hope I have the chance to do something like this in the near future, you're an inspiration, sir.