Any news??

We sent final payment to Jeff Bruce on Monday. The parts should be shipping out some time this week.

Pics plss....

There was a minor delay due to the exchange rate, but we got it sorted and Jeff sent the parts today and gave me a tracking number. The parts are expected to arrive on the 10th (actually the 11th across the international date line). Looks like I've got to get off my duff and mod that distributor. lol

So did you get the good stuff?

Yeah, the shaft showed up when expected but the other box should be here on Monday. The shaft looks really beautiful. I wasn't able to spend any time alone with it, but I can tell you Jeff Bruce does awesome work. It looks case hardenend and has a special woodruff type key to hold the front rotor journal in place (phase). All the other normal eccentic shaft nooks and crannies were there except the rear part has splines instead of a tapered fit for the rear counterweight.



I can't weight to see the rear counterwight and everything else. Like I said only the shaft has arrived so far. The other parts like the rotor journals should be in the other box. I'll know more tomorrow.

Here you see a front counterweight rebalanced for use in a 4 rotor arrangment, 19 long tension bolts, one long dowel pin rod and two shorter hollow dowel pins (for oil to flow through), a stationary gear machined and fit into an intermediate plate (and one below it), one front plate under the tension bolts (rear plate under it), a special rear counterweight with splines to match the splines on the end of the Jeff Bruce shaft, and finally two rotor journals that slide onto the shaft and are locked in place with a key.



The quality is superb. Jeff Bruce = class act.

In case you're wondering, Jeff Bruce didn't make that box. We did, so we could ship the side plates to Jeff. He needs the front and rear you're going to use and two intermediate plates for a 4 rotor, or one for a 3 rotor, as there are alignment issues. He dowel pins the plates together for an accurate cut to install the stationary gears into the intermediate plates. The box was made with an extra compartment large enough to ship the two new (front) stationary gears down to him. He was then able to fit the counterweights and rotor journals in there to ship back to us. I like his solution for all the tension bolts; looks like he drilled a bunch of holes in the 2x4 to secure them above the plates. https://www.nopistons.com/forums/pub...IR#>/smile.gif



One more thing, the rear nut is 48mm, not 54mm like what we're all used to. Makes sense since the threaded part appears to be a smaller diameter.

Looking good man. Now I'm itching to get a 4 rotor kit https://www.nopistons.com/forums/pub...IR#>/smile.gif. I'm a crack head for the 3 rotor and up applications lol.

What ecu and turbo or na?

NA two Weber 48 or 51 IDAs. Peripheral port.

How is your build going?

Since you can't buy MFR rotor housings anymore, we decided to borrow one from a local racer to see whether we can make some with the same or similar port timing.

Whats the fit like with the rear counterweight being splined instead of tapered? That would be the only concern I have with that shaft.. I am considering buying one right now as well, but havent made my mind up on which supplier to use. Its difficult to get a lot of feedback on the Japanese shafts since they don't seek the global market. Do you anticipate that any extra machining is needed before using the shaft kit, or does it look completely finished?

I'm sure it looks finished, but not being a machinist, it's just a guess. What I'd like to know is how much torque on the rear nut. It is different.

Is anyone else doing a 4 rotor?

only in our dreams https://www.nopistons.com/forums/pub...IR#>/smile.gif

hey Jeff, what makes you so special that your parts were shipped in a wooden crate....



I have not made an ounce of progress on my build, besides wiping the parts down every once in a while. I need to get a new intermediate housing and mod it to accept the stat gear so that all my irons are the same, I just have not had the time or $$$ due to school (graduated a month ago https://www.nopistons.com/forums/pub...1047683329.gif )...Once I find a job, its on!

The parts were sent in a wood crate, and received in same. Jeff was cool enough to drill out one of the cross beams to hold the tension bolts. No carboard boxes for us. Only a carboard tube, with the shaft in it. https://www.nopistons.com/forums/pub...1047683329.gif



Well, put that schooling to work for you and get bizzay on your 4 rotor! Over here we're gearing up to do a couple of peripheral ports. I relinquished three practice 13B housings and provided four practice 12A housings so we can get it right before cutting into good ones.

you guys are very sick indivduals!!!!!!

what did you decide on for port timing and size, and are you making any kind of fixture?

Timing and size will be close to MFR. I don't know the actual numbers. Size is about 2". Yeah we're making a jig.

Ive been reading this thread with great interest



How is everyones projects coming alaong.



what sort of power differences would you expect between a 3 or 4 rotor turbo'd set up, approx figures.

Free Bump

4 rotor anyone?
 

Need some advice. I don't know if I should go and try and find a rare 26B or is it possible to get 2 13B's and make a 26B out of that? I have my 1994 RX7 Rebuilt engine approx 10,000kms.. tasteful mods Australian delivered. Car has done 200,000kms but the engine was rebuilt approx 10,000kms ago (including brand new short motor).

Microtech LT-12S, 3in Turbo-back exhaust, Koyo-N-Flow triple pass aluminium radiator, Series 8 turbos, Series 8 coilpacks, Series 8 injectors, "fast acting IAT sensor", Tweak-It air pump removal pulley, Brand new ISC coilovers, FEED style side skirts, Series 8 front lip
Series 8 Tail lights, Dark tint to windows, SSR Type-C RS style 18x9+30 wheels.

That has a twin turbo 13B, if I got rid of my turbos and got another 13B that is n/a and combined the rotors to make 4 would that work?