Carb adjustment

MAZDAT · 01-29-2010, 12:49 AM

I have a totally stock 73 Rx2 with a 12a and twin dizzy, Does anyone know how to adjust the stock carb on this thing, any info greatly appreciated

rx4ur7 · 01-29-2010, 12:46 PM

1.5 top 2.5/3.5 bottom are factory settings. Top screw is air, bottom fuel. That should get you going as long as someone has not played with throttle plate. Top is used for idle setting, bottom for emissions.

Kentetsu · 01-29-2010, 01:51 PM

Sterling is our resident expert. He also has a lot of information built up over at www.sterlingmetalworks.com

The settings listed above should get you close, but for fine tuning take a look at the tuning section at the site listed above.

Good luck.

.

MAZDAT · 01-29-2010, 05:46 PM

I'll try it, I just needed direction on how to do it, I really appreciate it!! Thanx

rx4ur7 · 02-15-2010, 12:58 AM

I do the fine tuning with an exhaust analyzer as all street registered vehicles that leave this shop have to pass IM240.
And yes from what I hear and have seen Sterling is the top modifier now.

jerry · 03-21-2010, 05:43 PM

does the 1985 model have two adjustment screws, i only see one

Kentetsu · 03-22-2010, 11:25 AM

One on the body of the carb (idle mixture), and one that is kind of hidden under the linkage at the back of the carb (idle speed). That one, you have to get down low, practically resting your chin on the driver's side fender, in order to see it.

fire85gslse · 03-22-2010, 03:51 PM

Quote:

Originally Posted by MAZDAT

I have a totally stock 73 Rx2 with a 12a and twin dizzy, Does anyone know how to adjust the stock carb on this thing, any info greatly appreciated

My rx2 did not have a Nikki stock, so check yours to see if it is a hitachi. Then from there people will be able to help more. Not sure if the sterling site will help with a hitachi.

MAZDAT · 03-23-2010, 10:27 PM

Quote:

Originally Posted by fire85gslse

My rx2 did not have a Nikki stock, so check yours to see if it is a hitachi. Then from there people will be able to help more. Not sure if the sterling site will help with a hitachi.

my has NIKKI on the side

jerry · 04-06-2010, 10:24 PM

did hitachi build carbs for stock 1985 rx7`s, just assumed it was a nikki, cant find idle adjust screw, looks just like a stock nikki from pics

01-29-2010, 12:49 AM	#1
MAZDAT The Newbie Join Date: Jan 2010 Location: Long Beach, Cali Posts: 9 Rep Power: 0	Carb adjustment I have a totally stock 73 Rx2 with a 12a and twin dizzy, Does anyone know how to adjust the stock carb on this thing, any info greatly appreciated

01-29-2010, 01:51 PM	#3
Kentetsu RCC Contributor Join Date: Feb 2008 Location: Grand Rapids, Michigan Posts: 530 Rep Power: 18	Sterling is our resident expert. He also has a lot of information built up over at www.sterlingmetalworks.com The settings listed above should get you close, but for fine tuning take a look at the tuning section at the site listed above. Good luck. . __________________ "Learn from the past, or it will become your future...." '85 GS 12a + LSD/Sterling carb/Respeed coilovers/Respeed front swaybar/Respeed adj. rear spring perches/Illuminas/Bilsteins on rear AutoX vids @ http://www.youtube.com/user/Kentetsu1

01-29-2010, 12:46 PM	#2
rx4ur7 Rotary since 1972 Join Date: Nov 2008 Location: Tucson Posts: 231 Rep Power: 17	1.5 top 2.5/3.5 bottom are factory settings. Top screw is air, bottom fuel. That should get you going as long as someone has not played with throttle plate. Top is used for idle setting, bottom for emissions.

01-29-2010, 05:46 PM	#4
MAZDAT The Newbie Join Date: Jan 2010 Location: Long Beach, Cali Posts: 9 Rep Power: 0	I'll try it, I just needed direction on how to do it, I really appreciate it!! Thanx

02-15-2010, 12:58 AM	#5
rx4ur7 Rotary since 1972 Join Date: Nov 2008 Location: Tucson Posts: 231 Rep Power: 17	I do the fine tuning with an exhaust analyzer as all street registered vehicles that leave this shop have to pass IM240. And yes from what I hear and have seen Sterling is the top modifier now.

03-21-2010, 05:43 PM	#6
jerry The Newbie Join Date: Jan 2010 Posts: 9 Rep Power: 0	does the 1985 model have two adjustment screws, i only see one

03-22-2010, 11:25 AM	#7
Kentetsu RCC Contributor Join Date: Feb 2008 Location: Grand Rapids, Michigan Posts: 530 Rep Power: 18	One on the body of the carb (idle mixture), and one that is kind of hidden under the linkage at the back of the carb (idle speed). That one, you have to get down low, practically resting your chin on the driver's side fender, in order to see it.

04-06-2010, 10:24 PM	#10
jerry The Newbie Join Date: Jan 2010 Posts: 9 Rep Power: 0	did hitachi build carbs for stock 1985 rx7`s, just assumed it was a nikki, cant find idle adjust screw, looks just like a stock nikki from pics