Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: Wile E Coyote on June 23, 2011, 10:14:32 PM

Title: 4 Rotor Crank ??????
Post by: Wile E Coyote on June 23, 2011, 10:14:32 PM
Anyone know where I can get a 4 rotor crank from ? I know they are expensive but where can I buy one ?
 
Cheers
Ashley
Title: 4 Rotor Crank ??????
Post by: Ada7 on June 23, 2011, 10:19:48 PM
There\'s a company in New Zealand that do them. Cant remember there name tho :confused:
Speak to Carl at Hayward rotary or Pip At WGT

Adam
Title: 4 Rotor Crank ??????
Post by: m1tch on June 23, 2011, 10:25:19 PM
I know a place that you can buy one off the shelf, but I am banned from mentioning the name of the seller on this forum, they are £2,800 for the shaft alone, plus many more for all the mods, plates and pins you need lol
Title: 4 Rotor Crank ??????
Post by: Ada7 on June 23, 2011, 10:29:22 PM
You\'re banned from naming a seller? :confused:

Adam
Title: 4 Rotor Crank ??????
Post by: Ada7 on June 23, 2011, 10:30:35 PM
If you\'re thinking of doing a 4 rotor FD i hope you\'ve got around £30k to play with

Adam
Title: 4 Rotor Crank ??????
Post by: m1tch on June 23, 2011, 10:37:21 PM
There is always the \'G-spec\' (ghetto spec) 4 rotor setup:

(http://i93.photobucket.com/albums/l49/m1tch_2006/1223005652_0a53509908.jpg)
(http://i93.photobucket.com/albums/l49/m1tch_2006/1223005646_4cfd44737f.jpg)
(http://i93.photobucket.com/albums/l49/m1tch_2006/1223005630_af29a5a07e.jpg)
Title: 4 Rotor Crank ??????
Post by: Speedworks on June 24, 2011, 08:27:03 AM
check Kiwi racing in NZ
Title: 4 Rotor Crank ??????
Post by: TiddlesRX7 on June 24, 2011, 09:04:16 AM
Ash, I\'ll let you know the name of the seller Mitch is on about later (im sure it\'ll be the same person that shall not be named). Are you popping round with my gearbox on your way home mate?

Oh and I\'ve been thinking that we might be better going down the 20b route with forced induction for this one anyway.

Ade
Title: 4 Rotor Crank ??????
Post by: Grant Monkhouse on June 24, 2011, 09:25:58 AM
You can\'t make statements like that ^^^ and not tell anyone\'s else what your plans are.

It almost like saying I know where the fountain of youth is but I\'m nit going to tell you.
Title: 4 Rotor Crank ??????
Post by: BlitzBoy on June 24, 2011, 09:42:36 AM
Tiddles might be speaking about Rotaryart maybe?
A vendor may be banned, but cant see why we are not allowed to say the vendors name, its not swearing and not a police state this forum LOL
Title: 4 Rotor Crank ??????
Post by: BlitzBoy on June 24, 2011, 09:43:08 AM
PS Green Brothers down under do the E Shafts as well I think
Title: 4 Rotor Crank ??????
Post by: Mir on June 24, 2011, 09:52:22 AM
Ummmm four rotor! Good see that someone els shares the same dream!! I have done a complete home work on this topic! If you need help do let me know!

Mir
Title: 4 Rotor Crank ??????
Post by: TiddlesRX7 on June 24, 2011, 11:43:31 AM
Quote from: BlitzBoy;771342Tiddles might be speaking about Rotaryart maybe?
A vendor may be banned, but cant see why we are not allowed to say the vendors name, its not swearing and not a police state this forum LOL

Actually that was gonna be my 2nd suggestion.

QuoteYou can\'t make statements like that ^^^ and not tell anyone\'s else what your plans are.

It almost like saying I know where the fountain of youth is but I\'m nit going to tell you.

Ha ha. I could tell you but that would spoil the fun! It\'s Ash\'s project and it is just in the thinking about stage atm. All I have done is supply a blown 13BT to Ash for insparation so far. You know something to tear apart to get the juices flowing.
Knowing Ash if this does come off it\'ll be a monster.


Ade
Title: 4 Rotor Crank ??????
Post by: Wile E Coyote on June 24, 2011, 05:39:13 PM
Quote from: Grant Monkhouse;771338You can\'t make statements like that ^^^ and not tell anyone\'s else what your plans are.
 
It almost like saying I know where the fountain of youth is but I\'m nit going to tell you.
Ok i\'ll give you a hint . First of all I want to get all parts together before I build this and the deciding factor is the crank . The motor will have 4 rotors and housings from 2x13Bt\'s and will be running 2x throttle bodys off the same motors , 2xinlet manifolds machined and welded to from one . to top this engine off it will have a twin turbo setup . 1 turbo for 2 rotors and another 1 for the other two rotors . Turbos will be hybrid ceramic roller bearing turbos build by me(was thinking size of gt30) . Once I\'ve built this I\'ll buy a FC or a RX8 depending on funds as a donor car
 
Quote from: Mir;771348Ummmm four rotor! Good see that someone els shares the same dream!! I have done a complete home work on this topic! If you need help do let me know!
 
Mir
Any Ideas would be welcome
Title: 4 Rotor Crank ??????
Post by: Dr Hoo on June 24, 2011, 06:00:15 PM
Quote from: BlitzBoy;771342Tiddles might be speaking about Rotaryart maybe?
A vendor may be banned, but cant see why we are not allowed to say the vendors name, its not swearing and not a police state this forum LOL

Are you allowed to say why?
 
I was thinking about ordering something from Rotaryart, but now I\'ve got little alarm bells ringing in my head.
Title: 4 Rotor Crank ??????
Post by: shaunwil on June 24, 2011, 06:10:51 PM
GT30 is too small, you want at least a GT35 per 2 rotors. I\'m looking at a GT3794r for a streetport ported FD engine.

Shaun
Title: 4 Rotor Crank ??????
Post by: Wile E Coyote on June 24, 2011, 07:15:13 PM
Quote from: shaunwil;771437GT30 is too small, you want at least a GT35 per 2 rotors. I\'m looking at a GT3794r for a streetport ported FD engine.
 
Shaun
GT35 will be easier
Title: 4 Rotor Crank ??????
Post by: m1tch on June 24, 2011, 07:39:12 PM
I was looking at a GT4088 until deciding to go all out and get a T88 :D there is a T78 going for silly low money in the for sale section btw!
Title: 4 Rotor Crank ??????
Post by: BlitzBoy on June 24, 2011, 11:42:23 PM
Quote from: Dr Hoo;771434Are you allowed to say why?
 
I was thinking about ordering something from Rotaryart, but now I\'ve got little alarm bells ringing in my head.

nothing wrong with Rotaryarts, ordered loads of stuff from them in the past, prompt service . Just politics between them and MRC
Title: 4 Rotor Crank ??????
Post by: Indian on June 25, 2011, 02:45:47 AM
http://www.xtremerotaries.co/engines//4rotor.htm (http://www.xtremerotaries.co/engines//4rotor.htm)

and I believe these guys can point you in the right direction: http://www.chipsmotorsports.com/home (http://www.chipsmotorsports.com/home)

Good Luck if you start.
Title: 4 Rotor Crank ??????
Post by: Rivalrx on June 25, 2011, 09:47:04 AM
pulse performance in NZ do these engines to order...26b is a thing of beauty
Title: WARNING deal with the manufacturer NOT THE MIDDLE MAN/MEN!!!!
Post by: PGiljevic on June 26, 2011, 10:19:43 AM
Title: 4 Rotor Crank ??????
Post by: m1tch on June 26, 2011, 10:26:51 AM
Ooo a towel set for $150 :D
Title: 4 Rotor Crank ??????
Post by: Grant Monkhouse on June 26, 2011, 11:11:21 AM
$2400 nz dollars!! That is cheap!!
Title: No problems ;)
Post by: PGiljevic on June 26, 2011, 11:17:28 AM
Quote from: Grant Monkhouse;771669$2400 nz dollars!! That is cheap!!

You kun7s can thank me later for my immense knowledge and contacts! :WaveBye

There is too much bullsh7t in the rotary/performance car game! :Typing and its only getting worse with the internets and exponential hype in general.

I\'ll continue to debunk it for many a year into the future, but my tolerance for the internets/forums/blogers/gen Y+ know it all fu7kturds is pretty low these days :WaveBye
Title: 4 Rotor Crank ??????
Post by: TiddlesRX7 on June 26, 2011, 11:42:29 AM
I\'ve just text the OP to have a look at this. Thanks for the info.

Ade
Title: 4 Rotor Crank ??????
Post by: HaywardRotary on June 26, 2011, 05:55:43 PM
The Kit does not include all of the parts needed to build one of these engines and the expense is not in the block alone, also the time for doing the build is much more extensive than a 2  rotor engine contrary to what people might think with for example maching needed doing for the side housings.
Ontop of the block price there is the custom fitting,speial ancillaries and manifolds for the inlet which depending on what you want to achieve can be fairly straight forward or complicated.
As for turbo charging one then you run into difficulties trying to keep the engine cool,up the drag strip is easy for 10 seconds but on the road it is an entirely different matter,hence why no turbo 4 rotor engines are raced on circuit as of yet even by Mazda.
Engine management is expensive too that will run a setup like this.
So it is wrong to paint a picture that it is a doddle and cheap when it clearly is not.
Regards
Carl
Title: 4 Rotor Crank ??????
Post by: Wile E Coyote on June 26, 2011, 08:54:44 PM
Machining isn\'t a problem . I\'m a toolmaker by trade but do on-site machine for a living . The only thing that worries me is sorting a crank . I\'m thinking of machining a Ghetto spec crank as mentioned earlier . Might consider doing 2 , one for someone else .
Title: 4 Rotor Crank ??????
Post by: Grant Monkhouse on June 26, 2011, 10:03:21 PM
i cant see there being a problem with the said ghetto spec e shaft, i just wont have that distinct 787B lemans car sound, i also think that from reading many threads on 4rotor build is that the 2 joined 13Bs is easier to tune, timimg etc.
 
and i would have thought it was easier balanced as you essentially have 2 up 2 down so to speak, instead of the 90* split between each lobe on the 787B shaft, admittedly t
i dont think the 787B shaft goes 0*, 90*, 180*, 270* from front to back. anyone understand that?? think i have just confused myself
Title: 4 Rotor Crank ??????
Post by: Grant Monkhouse on June 26, 2011, 10:06:16 PM
with the ghetto shaft you would have to build a custom centre to cover the join.
 
there was a tread on ausrotary where 2 have put 2 12a\'s together like this and got it running on carbs with no exhaust, lets just say it sounded like Ares the god of war clearing his throat!!!!!!
 
i will try find the page and post the link
Title: 4 Rotor Crank ??????
Post by: Wile E Coyote on June 26, 2011, 10:08:11 PM
The G-spec would be the easiest to tune
Title: 4 Rotor Crank ??????
Post by: shaunwil on June 26, 2011, 10:27:28 PM
Would have thought the LinkECU G4 Extreme would be a good option for tuning.

There is a good thread on rx7club stating the firing angles for up to 6 rotors I think, not sure if its the ghetto 4 rotor thread !

Shaun