RX7Club.com - Mazda RX7 Forum

What's required to run a 20B on carbs?

Thread Tools
 
Search this Thread
 
Old 12-01-12, 03:41 PM
  #1  
Still got it.

Thread Starter
iTrader: (2)
 
Prometheus's Avatar
 
Join Date: Jan 2007
Location: Seattle, Washington
Posts: 1,687
Received 3 Likes on 3 Posts
What's required to run a 20B on carbs?
I've been looking, but have been turning up fairly empty handed.

The mobile search function is crap on iPhones...
Prometheus is offline  
Reply Like
Old 12-01-12, 06:20 PM
  #2  
500+hp club

iTrader: (26)
 
silverfdturbo6port's Avatar
 
Join Date: Sep 2007
Location: .
Posts: 2,211
Likes: 0
Received 4 Likes on 4 Posts
Hows that 20b coming along? Now im in the market to buy another to put in my fd. If you have any extra parts let me know. -Nate
silverfdturbo6port is offline  
Reply Like
Old 12-03-12, 12:13 PM
  #3  
Full Member

 
chiquito1228's Avatar
 
Join Date: Mar 2006
Location: in the city
Posts: 190
Received 10 Likes on 5 Posts
here are some pics of 3 rotor carb intake. i have been wanting to do this for a while now. i was searching on the su carbs but i dont think they will flow enought for a 20b
Attached Thumbnails What's required to run a 20B on carbs?-0722_5mg.jpg   What's required to run a 20B on carbs?-28507772-900-mazda-rx3-all-fiberglass-20b-3-rotor-m.jpg   What's required to run a 20B on carbs?-triplecarb.jpg  
chiquito1228 is offline  
Reply Like
Old 12-03-12, 03:07 PM
  #4  
Still got it.

Thread Starter
iTrader: (2)
 
Prometheus's Avatar
 
Join Date: Jan 2007
Location: Seattle, Washington
Posts: 1,687
Received 3 Likes on 3 Posts
Mostly. I'm trying to figure out the timing split.

Trying to run leading & trailing spark on 3 rotors, with a distributor is what I'm trying to figure out.
Prometheus is offline  
Reply Like
Old 12-03-12, 04:20 PM
  #5  
Full Member

 
chiquito1228's Avatar
 
Join Date: Mar 2006
Location: in the city
Posts: 190
Received 10 Likes on 5 Posts
Racing beat sells a kit to modified a 12a distributor to run the 20b
chiquito1228 is offline  
Reply Like
Old 12-03-12, 05:12 PM
  #6  
500+hp club

iTrader: (26)
 
silverfdturbo6port's Avatar
 
Join Date: Sep 2007
Location: .
Posts: 2,211
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by Prometheus
Mostly. I'm trying to figure out the timing split.

Trying to run leading & trailing spark on 3 rotors, with a distributor is what I'm trying to figure out.
There is no need to run any split if your not going turbo.
And that is one of the hardest things you will have to figure out since your not going to run a ecu.
Id look into that racing beat distributor as the 20b fires 120* as oppose to the 13b firing every 180*
silverfdturbo6port is offline  
Reply Like
Old 12-03-12, 06:25 PM
  #7  
Moderator

iTrader: (3)
 
j9fd3s's Avatar
 
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes on 1,831 Posts
Originally Posted by chiquito1228
here are some pics of 3 rotor carb intake. i have been wanting to do this for a while now. i was searching on the su carbs but i dont think they will flow enough for a 20b
it depends on which SU's you pick, actually since the SU is straight thru when its WOT, they flow quite well. i'd think three 2" SU's would be plenty, it should flow about like a 3 barrel IDA.

it looks like they are more expensive than a Weber or a PMO, and getting THREE carbs to be consistent is not easy
j9fd3s is offline  
Reply Like

Trending Topics

Old 12-03-12, 07:41 PM
  #8  
Full Member

 
chiquito1228's Avatar
 
Join Date: Mar 2006
Location: in the city
Posts: 190
Received 10 Likes on 5 Posts
I think the 4 barrel intake witha nice carb will be better and easier to tune .
chiquito1228 is offline  
Reply Like
Old 12-03-12, 08:07 PM
  #9  
Luis Rx3 Project

iTrader: (3)
 
chino_rx3's Avatar
 
Join Date: Jun 2007
Location: SARASOTA ,Florida
Posts: 1,314
Received 11 Likes on 11 Posts
I think 3 nice throttle bodies will look hot ..
chino_rx3 is offline  
Reply Like
Old 12-03-12, 08:11 PM
  #10  
500+hp club

iTrader: (26)
 
silverfdturbo6port's Avatar
 
Join Date: Sep 2007
Location: .
Posts: 2,211
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by chino_rx3
I think 3 nice throttle bodies will look hot ..
I agree!
Rx7, Rx8, Mazda Rotary Engines, O ring, Race Car Engine Parts
Attached Thumbnails What's required to run a 20B on carbs?-20b-rotary-complete-kit-sizes-50mm-55mm_2367.jpg  
silverfdturbo6port is offline  
Reply Like
Old 12-03-12, 11:05 PM
  #11  
Luis Rx3 Project

iTrader: (3)
 
chino_rx3's Avatar
 
Join Date: Jun 2007
Location: SARASOTA ,Florida
Posts: 1,314
Received 11 Likes on 11 Posts
FL
Originally Posted by silverfdturbo6port
That's so nice ,,, I want mine longerrrrrrr lol like the 787's engine 26b long trumpets look
chino_rx3 is offline  
Reply Like
Old 12-03-12, 11:08 PM
  #12  
Luis Rx3 Project

iTrader: (3)
 
chino_rx3's Avatar
 
Join Date: Jun 2007
Location: SARASOTA ,Florida
Posts: 1,314
Received 11 Likes on 11 Posts
Image Detail for - Mazda 787B - LeMans Winner

Not this long but you get picture
chino_rx3 is offline  
Reply Like
Old 12-03-12, 11:11 PM
  #13  
Luis Rx3 Project

iTrader: (3)
 
chino_rx3's Avatar
 
Join Date: Jun 2007
Location: SARASOTA ,Florida
Posts: 1,314
Received 11 Likes on 11 Posts
Actually this look in any car but going straight up like 787 niceeeee
Image Detail for - Reveil Auto Mazda RX7 26B Redbull Ca Chante Chez Les Kiwis Videos
chino_rx3 is offline  
Reply Like
Old 12-04-12, 09:15 AM
  #14  
Full Member

 
chiquito1228's Avatar
 
Join Date: Mar 2006
Location: in the city
Posts: 190
Received 10 Likes on 5 Posts
here is another carb setup. any body know what kind of carbs are this?
Attached Thumbnails What's required to run a 20B on carbs?-ay0f0609.jpg  
chiquito1228 is offline  
Reply Like
Old 12-04-12, 11:19 AM
  #15  
Moderator

iTrader: (3)
 
j9fd3s's Avatar
 
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,578 Likes on 1,831 Posts
Originally Posted by chiquito1228
here is another carb setup. any body know what kind of carbs are this?
kind of ghetto, its 3 IDA's sawed in half...
j9fd3s is offline  
Reply Like
Old 12-07-12, 02:19 PM
  #16  
Still got it.

Thread Starter
iTrader: (2)
 
Prometheus's Avatar
 
Join Date: Jan 2007
Location: Seattle, Washington
Posts: 1,687
Received 3 Likes on 3 Posts
after looking at Racing Beat's distributor setup, I have figured out how to make the ignition work.
Prometheus is offline  
Reply Like
Old 12-07-12, 03:30 PM
  #17  
500+hp club

iTrader: (26)
 
silverfdturbo6port's Avatar
 
Join Date: Sep 2007
Location: .
Posts: 2,211
Likes: 0
Received 4 Likes on 4 Posts
Lets hear it
silverfdturbo6port is offline  
Reply Like
Old 12-08-12, 12:11 AM
  #18  
Full Member

 
chiquito1228's Avatar
 
Join Date: Mar 2006
Location: in the city
Posts: 190
Received 10 Likes on 5 Posts
Originally Posted by silverfdturbo6port
lets hear it
x2
chiquito1228 is offline  
Reply Like
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RX7 draw through turbo back on the road
Th0m4s
Build Threads
25
02-26-19 02:04 AM
20b with th400 or th350 trans
Sobr609
20B Forum
8
02-11-19 03:19 PM
Float bowl runs dry, car stalls
Rotospectre
New Member RX-7 Technical
3
03-28-18 03:33 PM
Tags
Back to Subforum
20B Forum
View Next Unread
20Beast in a GSL-SE




Advanced Search
Quick Reply: What's required to run a 20B on carbs?


Reply Closed Thread Share

All times are GMT -5. The time now is 08:24 PM.