Shrimp

Simply amazing. I operate CnC equipment in our shop, we have a 7'x14' 150a HDplasma, 5'x10' 50k waterjet w/ taper control, and we just got our first 3-in-1 (hobby level) Patriot CnC as a starter machine to get into precision machining outside of flat cutting.

How did you determine the correct layout and dimensions of the 4-rotor you are building? Did you design it from the ground up or start with something and take measurements?

tegheim

I have looked at 20B-shaft and 13B-shaft. Then measured, searched for info and designed.

Havn't done much lately, but have done some with the steering, the wattlink and finally some on the intermediate-plates.

This was a LEGO i designed




And this is how that goes in the car.


Here the intermediate-plate is prepared for the bearing

fazdaRX_8

subscribed

17a n/a pp

wow sub'd

Vierte

iTrader: (2)

Those are some robust uprights! In your design, did you perform an FEA? Also do you plan to install the steering rack below the frame rail or above?

tegheim

They are my own design yes. Better safe than sorry, but no FEA on those.
The steering rack will be below the frame.

stevensimon

iTrader: (11)

what size throttle bodies are you going with?

im starting to shop for my 4 rotor build and was thinking on 50mm tb's but that also seems a bit small..

tegheim

Havn't desided yet. But I'm thinking of 50mm also. Will have the runners about 50mm, so it would suit.

FB_rad

awesome work! this project goes beyond most peoples comprehension of "custom" two of my favorite automotive mfg's, mazda and Volvo.. I would love to rotary swap a p1800, with your help of course

tegheim

Have lately spent some time with the porting of the engine. Most in SolidWorks, but also in reality.













Thought I run with V-band instead of what is in the renderings. However, I must turning one half of the V-band myself, and it seems difficult to find the measure of it.
If anyone has seen it, or know how they should look like, I am receptive :-) Happy to metric! The tubes I intend to use is 50x2, ie 46mm internally.

driftxsequence

iTrader: (8)

Will blocking off that entire coolant passage effect reliability?

tegheim

All PP's are blocked on the cold side around the intake som I'm not worried :-)

Narfle

iTrader: (16)

That's the coldest part of the engine, so it should be OK. As he said, all pports have to do this. It's the give and take with this setup.
PPorts are generally less reliable than side ports, due to a number of factors(including use and rpms, etc.).

rx7 SE

iTrader: (5)

The renderings of your solidworks models are fantastic, wish I could get proE to look half that good. Might I ask how you got all of the dimensions for your coolant passages, or did you just measure each round individually?

tegheim

Thanks, I think Solid does a good job :-)
The answer is measure, measure and some measure... Its time consuming, but in my opinion worth it in the end.

I like this one to. Would say 99% acurate to the real thing. Took me a few hours to measure.





I got all my published renderings at:

http://s815.photobucket.com/albums/z...142/SolidWorks

rx7 SE

iTrader: (5)

wow, very impressive CAD work!

tegheim

Continued today with the trash-housing.
Did a test sleeve in the cnc-lathe. I am very satisfied with this. Have minor improvements to do with the real ones later.

indispeed

iTrader: (3)

man!!! i must come to sweden to see this project!! awesome project. keep up the good work

Furb

iTrader: (2)

First time I've ever seen someone put in a threaded sleeve!

engdahl

awesome

damic

Nice

tegheim

I'm looking an flexplate from a Automatic FD (or FC if they ever was made?)
Anyone?

My flywheel is going to so small so I need the flexplate to start the engine :-)

Copeland

iTrader: (42)

They were both available in automatic but you're most likely to find one from a 20B swap.

eage8

iTrader: (9)

All automatic FCs were non-turbo (in the US at least) so they have smaller diameter flywheels... You're going to want an FD flex plate.

or you might be able to make one....

mazdatrix also has some nice ones that accept small clutches:
http://www.mazdatrix.com/r-clutch-flywheel.htm

tegheim

In this case you're right. I need the bigger flywheel because of my gearbox.

But, why should the smaller flywheel from N/A be less better in other considerations?