The Yoshimura Roadster

[— fwdtamiya —]

I've heard the rumor and seen engine shots awhile back (which I will post later, I'm watching anime, collecting data and doing a lot right now ), but I just ran across this on Speedhunters, which also happens to feature a lot of our forum members. Does anyone else have more information about this car?

http://www.speedhunters.com/2012/11/miata-featurethis/

Mikiya Fukishima’s Roadster from Tokyo is a rare one. It’s a complete car released by Yoshimura (the motorcycle parts company) in 1992. He is the original owner and there were only 14 of them built in total.

[— fwdtamiya —]

http://ameblo.jp/morokosicorn/entry-10594350016.html

Yoshimura special high cam (IN230 ° / EX220 °)
Yoshimura special machined diversion high comp piston (Ford Festiva GT)
Piston connecting rod & precision balancing
Compression ratio 10.6: 1
Port & combustion chamber & valve polishing
Yoshimura special carbon head gasket
· Maximum output 148PS / 7000rpm (Unknown measured for the cab of)
• The maximum torque 16.3kg / 5200rpm (Unknown measured for the cab of)

MCL./Yoshimura owner on minkara
http://minkara.carview.co.jp/en/userid/197231/blog/

92 Yoshimura MCL roadster.
While those who do not know is I think most
I'm a complete car.
Engine Yoshimura, aero dynamics MCL.
September of that was the order in the new car 1992,
1992 The new car newly registered in December.
It is not accurate, but this car will have heard in 13 pcs eyes or 14 pcs eyes of 14 units.
Currently, mileage is still active duty beyond the 250,000 km.
Thank you.

Yoshimura engine main tuning content

Yoshimura SPL camshaft IN lift 9.0mm / working angle 230 ° (1mm lift)
EX lift 8.2mm / working angle 220 ° (1mm lift)
SPL computer unit fine appropriate fuel injection, setting the ignition timing, the improvement of pickup
Weight balance (piston / connecting rod) within 0.5g / 1.0g
Compression ratio UP 10.6: 1
Intake and exhaust port polishing finish
Combustion chamber polished
Intake and exhaust valves, Polished
SPL carbon head gasket
Black crystal paint head cover (Yoshimura logo)

Yoshimura engine specs

Total exhaust volume 1597cc
Inner diameter X stroke (mm) 78.0x83.6
Compression ratio 10.6
Maximum output (PS / rpm) 148 / 7,000
Maximum torque (kg · m / rpm) 16,3 / 5,200
Intake valve timing (at the time of 1mm lift) 13 ° BTDC-37 ° ABDC
Exhaust valve timing (at the time of 1mm lift) 33 ° BBDC- 7 ° ATDC
Valve clearance intake and exhaust 0 ° (self-adjusting)
Ignition timing / BTDC ° 10 ° ± 1 °
Firing order 1-3-4-2
Use fuel unleaded premium gasoline (GP-1)
Lubricant total capacity 3.6L (Yoshimura LCE700 * currently out of print)

Blue car doesn't seem to be an original MCL. Both ARC crossover tubes are aftermarket of course.








Carbs are aftermarket, tubes on the header are aftermarket (for scavenging)

[— Phatmiata —]

wow I don't believe I have ever seen one of these! What issues of the R&S books are you getting the scans from?

[— fwdtamiya —]

I actually just stole those from an online source. But the car appears briefly on Pg. 133 of HyperRev #1

I knew I had seen that style article somewhere in a magazine, where cars were being rated and I couldn't tell on what. Finally found it on Pg.35 of this J's Tipo. There's nothing more to it than what you see in the photo above.

[— freedomgli —]

Sweet. JDM goodness right there.

[etikoner]

I've heard about this car a good while back, didn't know it has such extensive engine work though!

Pretty nice numbers from the 1.6.
I also think I saw a header like that for sale recently, and I've owned the wood grain personal steering wheel in that picture and really loved it!

[— fwdtamiya —]

A trunk/spoiler has popped up for sale

https://page.auctions.yahoo.co.jp/jp/auction/w176510690