This is something we are working on at the moment.

and this.

This is what we have run previously, and Ally rotor with titanium inserts for the apex seals.

very nice!

so whats the final weight ?

I'll put up more details as this progresses.

Very nice work Put some pics up of rotor houseing and the rest of the motor to would be nice stat gear and so on e shaft.

Ill be watching this thread

interested on how you are going to keep it cool enough with what looks like no oil flow?

nice work

What were your findings with the aluminium rotor, and why make them from titanium now?

The ally rotors were running in a full bridgeport 13b with Garret GT40/94 turbo at 1.3 bar boost on the road in an FD RX7.
We did two versions of ally so far so far both with Titanium inserts.
They fared well with the second set doing better with minor mods.
Each time we ran over 1000 miles before pulling the engine and stripping.
What was really noteceable was not the power but the way the engine revved and went through the revs so much quicker than Mazda rotors do.
I limited the revs to 9500.
Of course with the new rotors we have yet to run them but that will be soon.
I will give out more details as time goes on.
By the way we are running our own design apex seals.
The reason for Titanium now is the long term stability of the material and another reason that I am not wanting to reveal yet but it should be something good for the future!(I will reveal soon)
Regards
Carl

That's awesome, keep us up to date with anything new
Cheers!

What sort of apex seals do ya make ya self and size 3mm 4mm 5mm seals ?????

And what ya make ya apex seals from.

i would like to know how much power ya seals can handle and springs before it falls to bits.

Very good work on the rotor to

Titanium my arse. I call bullshit. There is nothing on the linked site about this project or anything else on home made rotors, from any material.

That part being machined is aluminium. The chips are aluminium and the color and texture of the milled pockets is aluminium- probably 6082 grade. The display rotor on the blue background looks like a cast iron item with an aluminium insert of some sort grafted into it.

Apart from the expense- a rotor sized slice from a round bar of a suitable grade Ti. would cost around $2500, the stuff is unsuitable for rotors. It is difficult to machine- forming the narrow, deep side seal grooves would be almost impossible. Titanium is very prone to galling, it dislikes sliding contact of the sort rotor seals perform, and has various other properties that would make it unsuitable.
Real 2012 lightweight rotors would probably be formed from a metal/ceramic hybrid material if there was a need and a way to justify the enormous expense.

dude..... go back through and 'read' all posts.... ally rotors with titanium inserts for the apex seals.

i take back my quote

Update.
Finished rotor

What's the final weight?

70 miles driven so far.
All looking good, a couple of issues with fueling to deal with.
Will keep updating when we have more time.
Regards
Carl

Have done over 100 miles now all looking good.