Tegheim - Home made 4 rotor Wolvo 142 - Page 16

Tegheim · 06-17-2012, 05:46 AM

You mean that the combusion is not the same all over?

Pettersen · 06-17-2012, 07:59 AM

It refers to the shape of the combustion chamber.

LDR = Leading deep recess Good performance high emissions.
MDR = Middle deep recess Compromise to get down emissions.

Libor · 06-17-2012, 10:06 AM

Quote:

Originally Posted by Pettersen

It refers to the shape of the combustion chamber.

LDR = Leading deep recess Good performance high emissions.
MDR = Middle deep recess Compromise to get down emissions.

Well, I have seen too much data on this stuff so I forget most, but looking at "Recent Technology Development of High-powered Rotary Engine in Mazda", its clear that MDR design produces highest BMEP from all tested variants, especially in the top-end. Note: this is with both spark plugs. Second best was "leading flat" recess and LDR design was third as far as power goes.

With leading only ignition, leading flat was best and LDR/MDR were about the same at the top-end, LDR slightly better in midrange, but both considerably worse than leading flat variant. But the point is moot since the most people do use both spark plugs.

IIRC R26B and 13G also has MDR rotor pockets. Maybe this desing has bad name due to Renesis rotors, but their problem probably lies much more in inferior gas sealing - low dynamic compression.

Tegheim · 06-21-2012, 07:39 AM

Huh?!

Tegheim · 06-21-2012, 09:49 AM

Finished the lower brackets for the Coilovers.

Have changed my Cad a little. Moved the bracket 50mm to the center of the car, to gain 61.5° angle on the coil at rideheight, and 66.0° angle at full bump.

This is what it looked lite before the change.

Tegheim · 06-21-2012, 12:13 PM

Time for welding!

Tegheim · 06-24-2012, 07:45 AM

Today I got the spindle-surface straightend.
To be sure that the caliper and disc are in level.
And also, to get a fine surface to attach to.

Tegheim · 06-30-2012, 09:46 AM

I did some stabilizer bar knifes a while ago.

I am also satified with the IFS now. This will give me som adjustments and will be good at both road and hopefully track.

Today I worked a little in the CNC.

Turned out pretty good.

Monkman33 · 06-30-2012, 12:13 PM

Amazing work. Really!

lokirx706 · 06-30-2012, 11:51 PM

Amazing, I have worked with CNC in the past, but this is well over my head... Excellent build thus far! Cant wait to see it finished!!

RICE RACING · 07-01-2012, 08:24 AM

Reminds me of designing and building fabricated uprights (and all other parts!) for our Formula SAE cars back and the University I worked at ......... so so so many hours of work and I can relate to what you are doing!@

Keep it up.

Weltall · 07-01-2012, 01:40 PM

This is mind blowing! Hurry and get this done so I can buy one from you to put in my Opel GT!

Yoshi · 07-01-2012, 05:02 PM

This is quite the excellent build, sir!

vex · 07-01-2012, 07:32 PM

I want to make sweet, sweet love with this build.

I may have to pick your brain in a few years about some of your engine stuff. Consider yourself warned.

Raksj04 · 07-01-2012, 07:37 PM

I still wish I had half of the skill to do this.

06-30-2012, 12:13 PM	#234
Monkman33 Still Building my FD Join Date: Jun 2009 Location: Pasco, WA Posts: 255 Rep Power: 17	Amazing work. Really! __________________ Uh.... hi.

06-30-2012, 11:51 PM	#235
lokirx706 Rotary Fan in Training Join Date: Apr 2010 Location: New Carlisle, OH Posts: 71 Rep Power: 16	Amazing, I have worked with CNC in the past, but this is well over my head... Excellent build thus far! Cant wait to see it finished!! __________________

07-01-2012, 08:24 AM	#236
RICE RACING Don Mega Join Date: Dec 2008 Location: Utopia Posts: 1,688 Rep Power: 18	Reminds me of designing and building fabricated uprights (and all other parts!) for our Formula SAE cars back and the University I worked at ......... so so so many hours of work and I can relate to what you are doing!@ Keep it up. __________________ www.riceracing.com.au Worlds best Apex Seals Coil on Plug Water Injection ECU Calibration

07-01-2012, 05:02 PM	#238
Yoshi The Newbie Join Date: Mar 2012 Posts: 21 Rep Power: 0	This is quite the excellent build, sir! __________________ -bump steer makes driving more exciting- (>_<)

07-01-2012, 07:32 PM	#239
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. Posts: 2,113 Rep Power: 19	I want to make sweet, sweet love with this build. I may have to pick your brain in a few years about some of your engine stuff. Consider yourself warned. __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

06-17-2012, 05:46 AM	#226
Tegheim Rotary Fanatic Join Date: Feb 2011 Posts: 210 Rep Power: 15	You mean that the combusion is not the same all over?

06-17-2012, 07:59 AM	#227
Pettersen Rotary Fanatic Join Date: Mar 2010 Location: Norway Posts: 163 Rep Power: 16	It refers to the shape of the combustion chamber. LDR = Leading deep recess Good performance high emissions. MDR = Middle deep recess Compromise to get down emissions.

06-21-2012, 07:39 AM	#229
Tegheim Rotary Fanatic Join Date: Feb 2011 Posts: 210 Rep Power: 15	Huh?!

06-21-2012, 09:49 AM	#230
Tegheim Rotary Fanatic Join Date: Feb 2011 Posts: 210 Rep Power: 15	Finished the lower brackets for the Coilovers. Have changed my Cad a little. Moved the bracket 50mm to the center of the car, to gain 61.5° angle on the coil at rideheight, and 66.0° angle at full bump. This is what it looked lite before the change.

06-21-2012, 12:13 PM	#231
Tegheim Rotary Fanatic Join Date: Feb 2011 Posts: 210 Rep Power: 15	Time for welding!

06-24-2012, 07:45 AM	#232
Tegheim Rotary Fanatic Join Date: Feb 2011 Posts: 210 Rep Power: 15	Today I got the spindle-surface straightend. To be sure that the caliper and disc are in level. And also, to get a fine surface to attach to.

06-30-2012, 09:46 AM	#233
Tegheim Rotary Fanatic Join Date: Feb 2011 Posts: 210 Rep Power: 15	I did some stabilizer bar knifes a while ago. I am also satified with the IFS now. This will give me som adjustments and will be good at both road and hopefully track. Today I worked a little in the CNC. Turned out pretty good.

07-01-2012, 01:40 PM	#237
Weltall The Newbie Join Date: Jun 2012 Posts: 20 Rep Power: 0	This is mind blowing! Hurry and get this done so I can buy one from you to put in my Opel GT!

07-01-2012, 07:37 PM	#240
Raksj04 I have Ultra power in me. Join Date: Sep 2011 Posts: 457 Rep Power: 14	I still wish I had half of the skill to do this.