26B E-shaft - where?

m1tch · September 23, 2009, 05:08:12 PM

Hi guys, just wondering about this, and I know the answer is a lot, but roughly how much would a 26B e-shaft be? or indeed a shortblock triple e-shaft (not a 20B one) where would I ask for one of those to be made up?

Speedworks · September 23, 2009, 06:02:16 PM

KIWI racing in new Zealand

kev-yorks · September 23, 2009, 07:15:32 PM

Carl Hayard would probably be you best bet to speak with.

L18M · September 23, 2009, 07:41:08 PM

i guess u r serious about it then lol
bear in mind i had 2 engines and 4 rotors at one point, need to consider if the old housings r useable else Â£300 a pair used, also wont all 4 rotors need to be same weight?

BlitzBoy · September 23, 2009, 10:15:10 PM

Green Brothers in Kiwi Land, ask Erdin about his contacts, down under is where the Pros go

m1tch · September 23, 2009, 11:45:02 PM

Ok I will look into it, how much would I be looking at spending? Â£1k? I saw a 20B e-shaft on the bench, the first 2 lobes are standard and then the 3rd one just screws into the 20B only 3rd rotor lobe, I guess you can\'t screw 2 OEM 13b shafts together and support with a bearing?

BlitzBoy · September 24, 2009, 12:28:33 AM

1k lol and the rest probably closer to 3 to 4k, a 2 piece 13b shaft is well over 1k

m1tch · September 24, 2009, 12:39:42 AM

I will start saving then lol why are they so much? could 2 13B E-shafts be modified to work for less then a billion pounds rather than making a bespoke shaft?

shaunwil · September 24, 2009, 08:12:56 AM

Interesting read :

http://www.rx7club.com/showthread.php?t=638177

Shaun

m1tch · September 24, 2009, 12:06:05 PM

Im thinking a bit like this:

http://www.youtube.com/watch?v=A2nuYyMIVao

Which I guess is a bit like this with 2 V8 engines bolted together to make a v16:

http://www.youtube.com/watch?v=EO2MDBi6uYs

shaunwil - im loving that pic of the 39b build hehe

m1tch · September 24, 2009, 12:22:47 PM

AH HA! this is what I needed to see:

it does rather make sense as 1 end of the shaft is strong enough to plug into the drivetrain lol

rx7boy · December 06, 2009, 02:10:35 AM

Where did you find that and how much

Jono FD3 · December 06, 2009, 09:52:11 AM

oooooo I like that

one problem with it.... well 2 realy:

1: it\'s toooooo quiet
2: where are the blowers??!!

Jono

leeroy_25 · December 10, 2009, 09:53:52 PM

I am looking into the possibility of doing this also and I would plan on making my own E-shaft.. I have a few ideas and also found a thread some US guy had done building one for his Oval dirt racer.. There are ways to put two shafts together.. Just a case of having the ability to design it and get it machined. Splines will probably be expensive to get done.. Could have Square, Hex, key ways etc and I am sure there are other ways to do it too.. Lots of other things to consider as well.. Like setting up the ignition/electronics for one. I see a dizzy and points system seems to be the cheat, I presume that is because the norm is to start with an early NA 13B? Anyway I am in the early days of researching it all.

Gotta finish my RB30 build first! Sorry No cursing! LOL!

Lee

shaunwil · December 10, 2009, 10:14:01 PM

Splines are quite easy, just find a company that manufactures gears and they will have the shaving and hobbing technology to produce a male and female spline. If you can get them to recommend a spline they already produce you don\'t have any tooling cost.

I would say there would need to be a lot of FMEA on the strength of the spline in relation to the predicted torque of the engine to make sure it doesn\'t shred when revved hard.

Its definitely an interesting thing to do, including oil passages. All the offset countersinks for lobe positions and the split of the shaft itself.

All questions from a machinist / Design Engineer. Probably a lot more to think about too like Heat treatment and finishing.

Shaun