How to identify twin hitachi carbs [Forum - Main Forum] : Datsun 1200 Club

Main Menu

Home News Forum Photo Album Tech Wiki Downloads Web Links Polls FAQ Members Map

Fast Search

Slow Search

Google Ad

How to identify twin hitachi carbs

Browsing this Thread: 1 Anonymous Users

ddgonzal	How to identify twin hitachi carbs	#1
Moderator Joined: 2001/5/3 7:04 From 48 North Group: Registered Users Contentmaster Usermaster Posts: 31575	Quote: smariese wrote: hi huys.. I am getting flat top twin su carbs and manifold for a series and L series. the manifold and the carbs not attached. now, how to identity which carbs for A series and which for L. the jet and needle size is different for A compare to L? please advice. Posted on: 2019/6/25 6:26

Transfer

ddgonzal	Re: How to identify twin hitachi carbs	#2
Moderator Joined: 2001/5/3 7:04 From 48 North Group: Registered Users Contentmaster Usermaster Posts: 31575	Hitachi sidedraft carbs (SU-style) are almost exactly the same A-series and L16/L18 versions The material differences are: * L-series has stronger Suction Spring * A and L use different needle valve And the practical difference is in the throttle linkage. A uses cable linkage, L uses rod linkage (as far as I have seen) There are only two Suction Springs. So that's an easy change. However there are many needle valves. * I would change the spring and just run the L valve to start with. There are many adjustments you can make. The A valve is for a stock-spec GX engine (hi-rpm, large port) * If you have totally orginal GX or A12T engine (including the cam and exhaust system) then it would be worth sourcing the GX/A12T needle valve #M75 Posted on: 2019/6/25 6:39

Transfer

smariese	Re: How to identify twin hitachi carbs	#3
Home away from home Joined: 2013/12/3 4:41 Group: Registered Users Posts: 369	Many thanks for the reply.. Posted on: 2019/6/25 6:42

Transfer

smariese	Re: How to identify twin hitachi carbs	#4
Home away from home Joined: 2013/12/3 4:41 Group: Registered Users Posts: 369	yes. the suction spring of A series carb is soft compare to L16. Attach file: twin su.jpg (109.56 KB) Posted on: 2019/7/1 4:16

Transfer

smariese	Re: How to identify twin hitachi carbs	#5
Home away from home Joined: 2013/12/3 4:41 Group: Registered Users Posts: 369	http://datsun1200.com/modules/mediawi ... p?title=Hitachi_Twin_Carb according to the above link, the a)flat top b)without IMS c)2 bolt carbs are nissan competition carb? Posted on: 2019/7/1 4:33

Transfer

ddgonzal	Re: How to identify twin hitachi carbs	#6
Moderator Joined: 2001/5/3 7:04 From 48 North Group: Registered Users Contentmaster Usermaster Posts: 31575	British SU dome springs * Yellow, 8oz part number AUC1167 * Red, 4.5oz part number AUC4387 * Blue, 2.5oz part number AUC4587 Not sure which is closest to L-series Hitachi dome spring Posted on: 2019/7/1 4:34

Transfer

smariese	Re: How to identify twin hitachi carbs	#7
Home away from home Joined: 2013/12/3 4:41 Group: Registered Users Posts: 369	i got part numbers for twin su needle and nozzles from a friend. needle: 16354-A8710 / 16354-U0810 nozzle: 16355-H2310 are these correct numbers? Posted on: 2019/8/18 3:35

Transfer

ddgonzal	Re: How to identify twin hitachi carbs	#8
Moderator Joined: 2001/5/3 7:04 From 48 North Group: Registered Users Contentmaster Usermaster Posts: 31575	Nissan sold many needles for different engines. A87 = Needle #M76 is for L18 engine. U08 is the AMC for Datsun 610 SSS. The A12GX needle is M83 (Nissan part number 16554-H2316) Nozzle is 16355-H2310 Attach file: hitachi_m87.jpg (190.79 KB) Posted on: 2019/8/18 11:49

Transfer

Top

You can view topic.

You cannot start a new topic.

You cannot reply to posts.

You cannot edit your posts.

You cannot delete your posts.

You cannot add new polls.

You cannot vote in polls.

You cannot attach files to posts.

You cannot post without approval.