Tegheim - Home made 4 Rotor Wolvo project
http://i815.photobucket.com/albums/z...ps2cf94118.jpg
Wow!
So, now that you've got the thing fully rendered, you should be cranking these out out on the CNC any time now...! ;-)
When do we get to see the fruits of your CNC expertise?
Wow!
So, now that you've got the thing fully rendered, you should be cranking these out out on the CNC any time now...! ;-)
When do we get to see the fruits of your CNC expertise?
Have you thought about trying direct injection? Probably not the best experiment for a 4 rotor with this much work done to it, but a 13b with DI would be very interesting!
Thread Starter
Senior Member
Joined: Nov 2003
Posts: 533
Likes: 3
From: Sweden
We let Mazda do the testing 
They have the money I don't
But it's an idea that me and my friends have talked about for years.
Even to modify a stock 13B-housing, but thoose great ideas often came up when we had some beer
They have the money I don't
But it's an idea that me and my friends have talked about for years.
Even to modify a stock 13B-housing, but thoose great ideas often came up when we had some beer
Senior Member
Joined: Aug 2008
Posts: 493
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From: Belgium (2800)
@redlineracer: that video is bullshit
1. compression losses when there is a overlap on the spark plugs is almost nil and then the loss of forward power is also bs.
2. When a object is in a momentum it wants to stay in that momentum and when you ignite an mixture it takes a few ms before it reaches full force and the rotor has already moved away from the backward momentum.
3. the spark plugs don't ignite on the same time but a few ° apart from each other.
@tegheim: why are those spark plugs holes so airy?
1. compression losses when there is a overlap on the spark plugs is almost nil and then the loss of forward power is also bs.
2. When a object is in a momentum it wants to stay in that momentum and when you ignite an mixture it takes a few ms before it reaches full force and the rotor has already moved away from the backward momentum.
3. the spark plugs don't ignite on the same time but a few ° apart from each other.
@tegheim: why are those spark plugs holes so airy?
I toyed around with the semi-direct injection in top of the rotor housing too a while ago, but I'm not going to use it because it makes everything more difficult and complicated without actually adding power. It might help a tiny bit with fuel consumption and emmissions, but with a 4-rotor, what's the point really?
I think it can work though, maximum pressure in that area of the engine is around 3 bars, so you probably would like to use 6-8 bar injection pressure, which isn't a problem with modern injectors and a fuel pump like a bosch 044. I think using fully sequential injection is necessary though, and you need to be able to program the exact injection timing. By the way tegheim, are you planning to go turbo? You don't need 2, 3 or 4 injectors for a n/a engine, one single 1000cc injector is plenty!, maybe go with a ID2000 injector if you want to use e85 for some reason. I guess you can plug the unused injector bungs, that way you can always add injectors if you need more fuel at a later stage for some reason or end up using the rotor housing in another engine.
I think it can work though, maximum pressure in that area of the engine is around 3 bars, so you probably would like to use 6-8 bar injection pressure, which isn't a problem with modern injectors and a fuel pump like a bosch 044. I think using fully sequential injection is necessary though, and you need to be able to program the exact injection timing. By the way tegheim, are you planning to go turbo? You don't need 2, 3 or 4 injectors for a n/a engine, one single 1000cc injector is plenty!, maybe go with a ID2000 injector if you want to use e85 for some reason. I guess you can plug the unused injector bungs, that way you can always add injectors if you need more fuel at a later stage for some reason or end up using the rotor housing in another engine.
Thread Starter
Senior Member
Joined: Nov 2003
Posts: 533
Likes: 3
From: Sweden
No, John, I'm going for N/A, and the picture with all the injectors are just for fun, and for different placements.
I think I will use only one injector in the periferi-port. The one closest to the rotor. But still, it's just CAD-testing yet...
I think I will use only one injector in the periferi-port. The one closest to the rotor. But still, it's just CAD-testing yet...
Wasted spark plug
Joined: May 2012
Posts: 64
Likes: 0
From: Enschede, The Netherlands
Forget the intake and timing stuff, just add an oxygen injector!
Hé, let's inject with high pressure and you've got yourself a n/a* turbo!
Saves weight too.
Ok, now i stop.
Grtz Dennis.
*= non aspirated.
Hé, let's inject with high pressure and you've got yourself a n/a* turbo!
Saves weight too.
Ok, now i stop.
Grtz Dennis.
*= non aspirated.
Last edited by Black and Blue RX; Jan 9, 2013 at 11:21 AM.
Nice! I did mine just like that too. https://lh5.googleusercontent.com/-f...bB4/s912/9.JPG
You can place the fuel rail really close to the engine if you place the injectors here, it makes for a nice and compact setup. I'd like to try placing the injectors in front of the intake trumpets F1 style like this:
https://www.cloudshops.com.au/WebRoo...lery/PE042.jpg
But I think it might hurt the engine at idle / lower loads.
You can place the fuel rail really close to the engine if you place the injectors here, it makes for a nice and compact setup. I'd like to try placing the injectors in front of the intake trumpets F1 style like this:
https://www.cloudshops.com.au/WebRoo...lery/PE042.jpg
But I think it might hurt the engine at idle / lower loads.
Senior Member
Joined: Aug 2008
Posts: 493
Likes: 0
From: Belgium (2800)
@John: on the 787B (and other cars to) they have multiple injectors like that. 1 on the housing and 1 on the center of the trumpet and it moves along.
Been trying to drawn my own housing the the 12A spec (not easy)
and someday I'm going to let make a 15" version of my rims TWR style :p (original 13")
Been trying to drawn my own housing the the 12A spec (not easy)
and someday I'm going to let make a 15" version of my rims TWR style :p (original 13")
Joined: May 2005
Posts: 2,745
Likes: 0
From: North Bay, Ontario
I hate to ask, but is casting your own housings economically beneficial vs. new ones??? Or are you looking to create a better design, or just wanted to try doing it yourself because you can? Keep up the great work!