I have two (dual) SU carburetors but, I cannot find any part/model number on the SU's to identify what they are for. I posted a few pictures in hope that someone can recognize them for me. These SU's are new and never mounted.

Thanks for your help drdufty@midmich.net

They look like 4 screw round tops from an early 240. But I doubt they have never been used. Look at the side of the piston. Looks like the usual accumulation from gasoline.

Also, I'm a little confused by the banjo fitting. I haven't seen that on SUs before, especially since I already see the rubber fuel inlet connected as well as the breather. On mine there are only 2, not 3 connections.

But I doubt they have never been used. Look at the side of the piston. Looks like the usual accumulation from gasoline.

The side of the piston is accumulated with dust. These have been setting on a shelf for a long period of time

the one on the left is a british SU... you can tell by the mounting holes...

This carb was upside down when I took the photo. The two photos though is the same carburetor and is showing the front and back side view of it. I have two of these carburetors plus the fuel lines to link them together.

Hard to tell from looking but I can say they are 38mm from the 2 bolt mount. If they are Hitachis (metric) they came on either SSS 1600 JDM 510s or 1600 roadsters. If they are 1 1/2" SUs they could have come off anything. They look very Hitachiiiiii.....

yeah ddufty. like I said in reply to your gallery post - 1.5" bore carbs off of a 510, Roadster or some other Dat with the smaller bore SUs.

michael

I commented to your photo. It's a rear carb off a 1969 1600 roadster. The bowls are reversed from the 510 models, the 411 SSS and the 68 roadster did not have the recirculation valve. the 1970 roadster had a nipple, not a banjo for the bowl vent.

You can tell the bore size from the mounting flange. 1.75" (46mm) SU's have 4 mounting holes in the square pattern like the Z's - called HS6 type. HS4's are 1.5" (38mm) and have 2 mounting holes at 45 degrees like the one shown. HS2's are 1.25" I think (32mm?) and also have 2 mounting holes but in a vertical pattern not 45 degrees like these. I don't know of any HS2 size hitachi's used for Datsuns - anyone?

Here's a little page I started making but kinda gave up 1/4 way through. It's got some SU carb pics (snagged from ebay) that may be useful.

http://datsunprojects.org/mps210/carbs/

michael

You can tell the bore size from the mounting flange. 1.75" (46mm) SU's have 4 mounting holes in the square pattern like the Z's - called HS6 type. HS4's are 1.5" (38mm) and have 2 mounting holes at 45 degrees like the one shown. HS2's are 1.25" I think (32mm?) and also have 2 mounting holes but in a vertical pattern not 45 degrees like these. I don't know of any HS2 size hitachi's used for Datsuns - anyone?

Here's a little page I started making but kinda gave up 1/4 way through. It's got some SU carb pics (snagged from ebay) that may be useful.

http://datsunprojects.org/mps210/carbs/

michael

Hi michael

I vistited your page and the AUD52 MGB 62-63 HS4 photo you have looks a lot like the SU's I have the throat on my carbs are 1.5 Here is another picture of both carbs Thanks Dan

Hard to tell from looking but I can say they are 38mm from the 2 bolt mount. If they are Hitachis (metric) they came on either SSS 1600 JDM 510s or 1600 roadsters. If they are 1 1/2" SUs they could have come off anything. They look very Hitachiiiiii.....

Hi Bruce

thanks for your input. I posted another picture of the pair of them in this forum and they look very similar to an HS4

Thanks

Dan

I commented to your photo. It's a rear carb off a 1969 1600 roadster. The bowls are reversed from the 510 models, the 411 SSS and the 68 roadster did not have the recirculation valve. the 1970 roadster had a nipple, not a banjo for the bowl vent.

Hi Victor

Thanks for the info. Here is a picture of both of the carbs and the throat size is 1.5 Thanks Dan