SU carbs

[zenndog]

I have been searching the forum to find out more about SU carbs. I haven't found much info. I have a l20b with SU's that may go in a 510 wagon when/if I fianally get one. Just wanted to bone up a little. Are SU carbs a pain in the @#! or something? Is there a tech thread on here that I missed.

[HRH]

All your search skills are belong to me. Yes, there are multiple topics, SUs rock. I love mine.

[ggzilla]

You can't find it because we specialize in Datsun's Hitachi twin carbs. Not any old british SU carbs.

 

For a good overview, see Hitachi Twin Carb

[Skib]

Hitachi made SU's as well

 

Hitachi SU'S

 

http://www.ztherapy.com/ < get the "Just SU's" video, it contains anything and everything you will ever need to know about SU's

Edited August 15, 2009 by Skib

[ggzilla]

Hitachi made SUs? Mine don't say S.U. on them, just Hitachi. I have two pairs, one set is from a 510 SSS.

 

So Zenndog, what do you want? Factory Datsun dual-carbs, or SUs from a volvo or other european car?

[philip1]

basic sync: (engine off) have someone floor the throttle then grab the linkage for the rear carb and see if it moves. If it does you will need to adjust it to where it just hits the limiter as the front carb does. close the throttle all the way then grab the front linkage and see if there is any movement before the rear. if there is movement adjust the carb mounted idle screw till they both start to open at the same time.

 

Fuel mix: turn the large knob in (as you look down counter clockwise) all the way till it stops then back it off two turns. fire engine and adjust idle to 750rpm. once engine is warm reach in the rear carb and gently lift the slide if the engine quits turn the front big knob out (clockwise) 2 clicks and repeat test. once the engine will stay running on 2 cyl with the rear slide lifted repeat the same on the rear carb by lifting the front slide.

 

This should get you running a Unisync is the best way but this will get you running.

__________________

[zenndog]

Skib-lmao

 

gzilla- from your link quote:

 

Some Datsuns were fitted with sidedraft carburetors right from the factory. Usually fitted with twin Hitachi variable venturi carburetors which are very similar to S.U. (Skinners Union) carburettors from Britain. The Datsun 1200 GX models were fitted with twin Hitachi HJE38W 38 mm carburetors. Some Japan-market B210s were fitted with A12T or A14T engines which also used twin-Hitachi carbs. Many Datsun fans refer to the Hitachis sidedraughts as "SUs", so keep that in mind when you read information. It may be about the factory Hitachi sidedrafts, or it may be about the (non-Datsun) British SU sidedrafts.

 

Thanks for the input, now I know how to look up info and then, sometime in the future when I try to apply it, I will come up with other questions. I just want to read up and now I know that I was calling them by the name of the carb that Hitachi copied then improved.

 

Oh, and lastly, why don't you take a pair of round top hitachi's and pour some oil on them, pull down your pants, sit, and spin.

 

 

I was just reading up and I think I must have the 73 carbs, I think they are flat top. The motor came out of a 620 and the carbs came with it but the motor or the carbs must have come off of something else. I will post some pics when I go down to LA.

Edited August 16, 2009 by zenndog

[Mesh-71]

 

Oh, and lastly, why don't you take a pair of round top hitachi's and pour some oil on them, pull down your pants, sit, and spin.

 

:lol::lol::lol::lol:

[HRH]

I have a pair of British SUs on mine, and (Tony the tiger voice) "THEEEEEYYY'RE GRRRREAT!" :) Poo on Hitachi.

[Skib]

Skib-lmao

 

:lol: couldnt resist