Hey Bitchn

What time was set at Taupo for the 'Lap Record"??? What class???

 

I think it was Sport Sedans?? Well, this is what he told us anyway. Some one else said something about it too, but must take with grain of salt as it was wet too so does seem a little hard to believe, yet who knows.
Haven't a clue about the time sorry.
It was a red S1 with gold rims (not many of then eh ) and a 3 rotor in it.

 

Yeah, That's how I thought I would get it to fire, with six offsets.
The trick would be figuring out whether I wanted the each adjadcent set of rotors to be offset 180 degrees from one another, or offset by 20 degrees leading all the way back.
I wonder how hurley's did theirs?
I think the "reinforced" 20B would be the easiest, but I like the First option better.

I would built the eccentric shaft pieces out of billet steel, and lightened, of course.

Balancing wouldn't be too much of an issue.

The engine would be mounted up to a Transaxle, Porsche or ferrari if I could find one to handle the torque (unlikely). Clutch would be a problem. Otherwise, maybe an indy gearbox? This seems most likely.

Engine would run on a twin turbo system, and easily make around 1200 hp on pump gas.
Fuel mileage would be about 6 mpg (BUT WHO ******* CARES?).

Drivetrain would be put into a custom chassis'd car, mounted completely behind the driver, using the same wheel dimensions as an FD and perhaps the same suspension setup.
Car would have a full roll cage built into the frame, and then surrounded by the interior, and a carbon-fibre/kevlar body.
Vehicle weight of around 2000 lbs.

I got my ideas from the Saleen S7.
Input?
I would expect $300K for such a project.
Sean Cathcart

 

Bitchn

That was Bob Hyslops car in Kiwi Sports Sedans. The lap record at Taupo is 40.90 held by Gavin Stewart in a Series 1 13B turbo. Bob has done a 40.95-very close to the lap record.

Cheers !!

 

Yip that would be the guy, the names rings a bell, he was a very nice guy to talk to, showed us over his etc.

 

...pics of a 4 rotor in an FC. Probably from that place you guys posted earlier.

 

If this helps any, the 26B has the rotors at 90deg intervals on the shaft, and uses a 1-3-2-4 firing order.

 

I had some more emails with Tatsushi at Yashio Engineering (custom 4 rotors).

For what it is worth, they are fuel injected and the ECU is "the original made for exclusive use of the 4 rotor", which can be programmed for 2 rotor, 3 rotor or 4 rotor use (via PC).

He also told me that it can be turbocharged and the ECU can control this too.

FWIW, just figured I would add the info. Yashiro sells these for about $44K.

I told him because of the price and extensive modification that a turbocharged 3 rotor is more effective (before he mentioned that their 4 rotor could be turbo'd to produce more power).

This is an excerpt from the email:

"Then, it can cope with turbo, too.

Does Matt do his best with 20B?

Do your best.

tatsushi."



http://homepage1.nifty.com/yashiro-eng/

 

How can you make 850hp N/A from a 4-rotor that is based on the 13B?

I'm sorry that just doesn't add up... that's like having a 425hp N/A 13B....

 

Looks like a 6 rotor.....damn!

 

damn tripod...

heres the url

http://cp_www.tripod.com/rotary/unused/HURLEY2H.jpg

 

6! whats stoping them there 8! 12! More, hell get a long box pickup and put it in the bed, with that kind o power you could smoke the rims off the tires at idle

 

haha... dreams are good... to ppl who were carving this thread, and the ppl who posted in it, chill out! ...It's just a bunch of dreams and schemes and etc. Nothing wrong with that, nothing at all...

(I'm a dreamer, look where it got me... (it got me my first RX-7... ))

 

I got a couple of my friends really iterested in rotarys and one who doesn't know much of anything besides skateboarding (he is insane by the way) wants to get a touring bus and put a 24 rotor in it! I go WTF!! are you crazy how would you cool it and he said a really big fan!

just some stupid rambuling from me and my friends thought it would be somewhat funny.

 

2 speed power glide rebuilt for a funny car or similar dragster might handle it. Anything less..........I think would be scrap metal.

 

you are all worring about transmission! This seems to be one of the problems when building this kinds of engines..! Have someone ever thougt of not looking for parts from other cars... Why not look at the aircraft industry...! They have been handling massive power for a long time.. why not use the same technics that are use in aircraft transmissions. Im thinking of the different kind of metal alloys. All the diferent titanium alloys. Magnesium, etc etc...!

sorry for the bad english, im just a 1981 model air Norwegian mechanic ...!

 

damn, just put 2 13B's together like the LeMans car.

 

That wasn't "2 13B's put together" IIRC... Mazda made two different 4-rotors, the 13J and the R26B. (Not counting the experimental engines in the 60's)

 

Transmission? Well, if you don't mind the thing sounding like a rock crushing machine, a Hewland transaxle (from the CanAm days) would handle the power no trouble. Then again, you'd probably not be able to hear the trans over the noise from the engine. 6 rotor? Yes please...
I helped restore a CanAm car powered by an 850 horsepower 500ci Chevrolet, and the gearbox of choice was a fairly ancient Hewland 5-speed.

 

Aircraft transmissions are extremely expensive, use direct drive or a sprague clutch, and only have one gear ratio. High-performance aircraft vary their thrust by changing the pitch of the propeller blades, not by changing the transmission ratio or engine rpms. Some of us would like to drive faster than 30 miles per hour.

The Lenco transmissions are similar to aircraft transmissions, and you can stack the cases to create more gear ratios. The problem is that you cannot downshift, so these transmissions are not an option for speedway racing.
http://www.lencoracing.com/

 

Hmm, with tons of torque, I'd think it would be almost ok to start out in 4th gear (1.00 gearing). Then highway speeds could be reached without shifting.

 

i was thinking about the materials and all the alloys...! not the transimssion!

 

How can you make 850hp N/A from a 4-rotor that is based on the 13B?

I'm sorry that just doesn't add up... that's like having a 425hp N/A 13B....


1971 Mazda naturally aspirated 2 rotor= 110hp
2003 Mazda naturally aspirated 2 rotor= 250hp

1971 Mercedes naturally aspirated 4 rotor= 400hp
2003 naturally aspirated 4 rotor would then= 909hp w/ same advances.

I think 850hp naturally aspirated is attainable, especially since it doesn't have to meet emissions like the production engines in the above examples.

 

i think the mercedes engine was a lot larger in displacement than the mazda engines (3.5 or 4 liters?)
and mazda uses the same 654cc chamber. also don't forget that the lemans cars were making 700+ hp na, and they had enough reliability to run lemans twice without opening the motor.

mike

 

You're showing total ignorance on the math.&nbsp You know the displacement, all you need is VE/BSFC and you can get a much better number.

850hp is impossible short of spinning to over 10,000RPM+.



-Ted