20B N/A with RX8 rotors?? - Page 4

warwickben · 11-25-2008, 04:42 PM

Herblenny have you thought of this if you go carbed.

***Herblenny*** · 11-25-2008, 04:48 PM

WOW!

Actually, I'm going to be building 2 x 20bs. One NA (carb or EFI) and one FI low compression... This is my only chance right now to build both engines.. Once I have the S5 rotors, building will begin this winter... This time, 100%!

warwickben · 11-25-2008, 05:01 PM

how hard would you saw it is to build your own 20b. like buy a core 13b and the parts needed to make a 20b. what i mean is finding the parts.would it be more money then buying a 20b and rebuilding. cause my sa is going to be off the road for a few years and i know i want to replace my 12a with at least a 13b but like every rotary owner i really want a 20b. id really like to keep it carbed.

***Herblenny*** · 11-25-2008, 05:10 PM

You are going to have hard time finding 20B specific parts.. ie, one iron and the eshaft.

You could go 3 rotor or 4 rotor by going with aftermarket single piece eshaft and stack 12A or 13Bs. But you would have to go peripheral intake or go renesis irons and housings like the pictured earlier.

Personally, I would go oem 20B for turbo and stackable 3 rotor for NA... reason being, single e shaft doesn't handle high HP as it could twist easier... Think of it as a long wire vs. short.. It takes less force to twist long wire vs shorter one..

I just got off the phone with my builder and we are now shooting for Feb. 09 to get at least one engine built!

warwickben · 11-26-2008, 05:53 AM

dregg100 pm sent.

warwickben · 11-26-2008, 12:14 PM

Thanks. I was going to run a singal msd box then found out the down sides of it with a rotary. The great thing about this is it only cost me 45 for the ignitors and 30 for the 3rd coil.

Jeff20b is work on a setup like this for 20b's and the 4 rotor he is building.

rotaryextreme · 12-01-2008, 12:15 PM

I LOVE RCC because it is so much more civilized then other rotray forum's. This was a very nice way that things were discused in difference. Other forums you get flamed and labeled...ugh.

Ben

warwickben · 12-01-2008, 04:33 PM

iam so used to getting flamed on the other site. i had a huge problem when i put that ignition setup in my car. the coils arced out ect ect ect. turned out i used a 1981 dizzy wiring drawing for the dizzy to ignitors. turned out all i had to do was swap red and green. 15 post calling me dumb ect read the manual search ect. iam one of the few people on that site with this setup with a 80 dizzy lol yeah no help.

any ways i hope the build on your na motors is coming along good ect.

dregg100 · 12-26-2008, 06:07 PM

updates?

RX8Ualiv · 02-06-2009, 12:17 AM

has anyone looked at the rotary in the mazda furai prototype? it has a
renesis based R20b, which means that it has multiside ports, a more
powerful coil setup, high compression renesis rotors, and is N/A.
it produces 450 whp on E100 ethanol, but will run on good premium fuel
like shell v-power 93 octane. Racing Beat developed the motor under
cooperation with Mazda Motorsports, and i would like to get more
technical specs. i do know that the e-shaft and rotor assembly is
lightened and computer balanced and has what we could call a
stage 2 street/race port job, and a sprocket drive setup
with a better high flow oil pump and aluminum rotor housings
to replace the ones that are cast iron, which is lighter and
dissipates heat more efficiently, ceramic apex seals, and only consumes
half of the oil of the earlier 20b.
if anyone knows anything more please add to this thread, as i would
like to find out the exact specs as i intend do install this with a T56
6-speed and a l99-00 vette differential with a custom track bar, custom rear
trailing arms and custom a-arms.

RETed · 02-06-2009, 04:54 AM

You're asking about an engine in a prototype vehicle...?
Uh, good luck.

-Ted

gmonsen · 02-22-2009, 09:10 PM

As Herblenny knows, I have an FD powered by a 20b NA using high compression Rx8 rotors, monster street port, custom headers, ignition, with rotating assembly balanced to 10,000 rpm. It was making around 360-365 WHP in early runs. I haven't played with it at all over the winter, but will be tuning it this spring. I don't think it can do better than maybe 375 even at 9,500-10,000, if it can even get enough air there. (But it sounds great at those rpm's...)

The power is just fine, as this setup was developed for linear power, instant response, big low down torque, reliability, and great sound.

Gordon

11-25-2008, 04:42 PM	#1
warwickben sa rat rod Join Date: Mar 2008 Location: tewksbury ma Posts: 408 Rep Power: 18	Herblenny have you thought of this if you go carbed. __________________

11-25-2008, 04:48 PM	#2
*Herblenny* Founder/Administrator/Internet Pitbull :) Join Date: Jan 2008 Posts: 644 Rep Power: 10	WOW! Actually, I'm going to be building 2 x 20bs. One NA (carb or EFI) and one FI low compression... This is my only chance right now to build both engines.. Once I have the S5 rotors, building will begin this winter... This time, 100%! __________________ DGRR 2013 - Year of 13B www.DealsGapRotaryRally.com http://www.facebook.com/Herblenny

11-25-2008, 05:01 PM	#3
warwickben sa rat rod Join Date: Mar 2008 Location: tewksbury ma Posts: 408 Rep Power: 18	how hard would you saw it is to build your own 20b. like buy a core 13b and the parts needed to make a 20b. what i mean is finding the parts.would it be more money then buying a 20b and rebuilding. cause my sa is going to be off the road for a few years and i know i want to replace my 12a with at least a 13b but like every rotary owner i really want a 20b. id really like to keep it carbed. __________________

11-25-2008, 05:10 PM	#4
*Herblenny* Founder/Administrator/Internet Pitbull :) Join Date: Jan 2008 Posts: 644 Rep Power: 10	You are going to have hard time finding 20B specific parts.. ie, one iron and the eshaft. You could go 3 rotor or 4 rotor by going with aftermarket single piece eshaft and stack 12A or 13Bs. But you would have to go peripheral intake or go renesis irons and housings like the pictured earlier. Personally, I would go oem 20B for turbo and stackable 3 rotor for NA... reason being, single e shaft doesn't handle high HP as it could twist easier... Think of it as a long wire vs. short.. It takes less force to twist long wire vs shorter one.. I just got off the phone with my builder and we are now shooting for Feb. 09 to get at least one engine built! __________________ DGRR 2013 - Year of 13B www.DealsGapRotaryRally.com http://www.facebook.com/Herblenny

11-26-2008, 05:53 AM	#5
warwickben sa rat rod Join Date: Mar 2008 Location: tewksbury ma Posts: 408 Rep Power: 18	dregg100 pm sent. __________________

11-26-2008, 12:14 PM	#6
warwickben sa rat rod Join Date: Mar 2008 Location: tewksbury ma Posts: 408 Rep Power: 18	Thanks. I was going to run a singal msd box then found out the down sides of it with a rotary. The great thing about this is it only cost me 45 for the ignitors and 30 for the 3rd coil. Jeff20b is work on a setup like this for 20b's and the 4 rotor he is building. __________________

12-01-2008, 12:15 PM	#7
rotaryextreme i like spinners Join Date: Sep 2008 Location: Union City Posts: 250 Rep Power: 17	I LOVE RCC because it is so much more civilized then other rotray forum's. This was a very nice way that things were discused in difference. Other forums you get flamed and labeled...ugh. Ben __________________ The ingenious and decidedly weird Wankel rotary engine works by using internal combustion to bounce a fat metal triangle around inside a hollow metal kidney bean, which hula-hoops around a central shaft to generate power.--- Jalopnik www.rotaryextreme.com, after more then a 2 year break, Rotary Extreme Re-opens 9/11/08.

12-01-2008, 04:33 PM	#8
warwickben sa rat rod Join Date: Mar 2008 Location: tewksbury ma Posts: 408 Rep Power: 18	iam so used to getting flamed on the other site. i had a huge problem when i put that ignition setup in my car. the coils arced out ect ect ect. turned out i used a 1981 dizzy wiring drawing for the dizzy to ignitors. turned out all i had to do was swap red and green. 15 post calling me dumb ect read the manual search ect. iam one of the few people on that site with this setup with a 80 dizzy lol yeah no help. any ways i hope the build on your na motors is coming along good ect. __________________

12-26-2008, 06:07 PM	#9
dregg100 Rotary Fanatic Join Date: Feb 2008 Posts: 432 Rep Power: 18	updates? __________________ '93 SSM Touring-S475... '87 Tii-LS1/T56

02-06-2009, 12:17 AM	#10
RX8Ualiv performance genius Join Date: Feb 2009 Location: palm coast, FL Posts: 2 Rep Power: 0	has anyone looked at the rotary in the mazda furai prototype? it has a renesis based R20b, which means that it has multiside ports, a more powerful coil setup, high compression renesis rotors, and is N/A. it produces 450 whp on E100 ethanol, but will run on good premium fuel like shell v-power 93 octane. Racing Beat developed the motor under cooperation with Mazda Motorsports, and i would like to get more technical specs. i do know that the e-shaft and rotor assembly is lightened and computer balanced and has what we could call a stage 2 street/race port job, and a sprocket drive setup with a better high flow oil pump and aluminum rotor housings to replace the ones that are cast iron, which is lighter and dissipates heat more efficiently, ceramic apex seals, and only consumes half of the oil of the earlier 20b. if anyone knows anything more please add to this thread, as i would like to find out the exact specs as i intend do install this with a T56 6-speed and a l99-00 vette differential with a custom track bar, custom rear trailing arms and custom a-arms.

02-22-2009, 09:10 PM	#12
gmonsen The Ancient One Join Date: Mar 2008 Location: Eastern Pennsylvania Posts: 144 Rep Power: 18	As Herblenny knows, I have an FD powered by a 20b NA using high compression Rx8 rotors, monster street port, custom headers, ignition, with rotating assembly balanced to 10,000 rpm. It was making around 360-365 WHP in early runs. I haven't played with it at all over the winter, but will be tuning it this spring. I don't think it can do better than maybe 375 even at 9,500-10,000, if it can even get enough air there. (But it sounds great at those rpm's...) The power is just fine, as this setup was developed for linear power, instant response, big low down torque, reliability, and great sound. Gordon __________________ 1993 Rx7 R1 20b NA 1994 Rx7 20b supercharged project 1991 BMW 850 6 speed 1991 BMW E30 M3 Evo II