Strange SU's

shifty · Post by **shifty** » Wed May 18, 2005 1:26 am

I have a few questions about a pair of 2L SU's - I'd appreciate your help.

The carbs came with a donor engine, block numbers indicate it is from a '69 SRL. The carbs have 1600-style floats and valves unlike the other carb set I have (also from a '69).

At first I thought someone had put 1600 float bowls on, but they are mirror image (unlike the carbs on my 67 R-16). Ever seen that? They appear to to fit properly to the carb body. They also have the thermal/overflow valve.

The needles seem odd - more blunt is the best way I can describe them - with a more rounded taper.

The throttle shafts on this pair seem really good, do I just use 1600 floats, etc. and go with these carbs?

Post by **spl310** » Wed May 18, 2005 6:08 am

Leigh,

Towards the end of the production run, Nissan started using the 1600 type floats and tops on the 2000s. I believe that the carbs that you have are 1970 model carbs. The blunted needles are likely a smog needle - Keith could tell you more about those.

The 1600 type float chambers should be fine...

shifty · Post by **shifty** » Wed May 18, 2005 10:31 am

Thanks Sid! Keith confirmed that the 2000's came with both styles of floats and bowls.

The big question is to rebuild this set - needles, nozzles, floats, etc. or frankenstein the two sets together, if possible.

Or do I forget all this SU business and break out the late-style set of Solexes I've been saving in box for SRL-00139?

Conner · Post by **Conner** » Wed May 18, 2005 12:16 pm

Quick question: how do you guys clean-up your carbs (the metal carb bodies) so well? Mine are all grungy like a "before picture" and I'm wondering how you get them nice and pretty like in the "after" pictures I've seen. Is it just elbow grease or what?
Leigh--on your webpage you have exactly the kind of before and after pics I'm talking about.

shifty · Post by **shifty** » Wed May 18, 2005 1:00 pm

I just use carb cleaner and a toothbrush to start. Then I use some aluminum polish that comes in a can with wadding, then some liquid metal polish.

Lots of elbow grease!

Conner · Post by **Conner** » Wed May 18, 2005 1:30 pm

Lots of elbow grease!

Thanks--I've got plenty of that!

Post by **Datrock** » Wed May 18, 2005 1:41 pm

I've looked in all the parts stores and have never been able to find elbow grease.

.. Bill

shifty · Post by **shifty** » Wed May 18, 2005 1:46 pm

It's right next to the muffler bearings.

Any concerns running an "A" cam with Solexes?

ole skool · Post by **ole skool** » Wed May 18, 2005 3:27 pm

A rare pic of the elusive muffler bearing. Actually, Volvo diid have a part listed as a muffler bearing, but I think this was the result of a poor Swedish to English translation:

http://www.shoclub.com/images/Mufflerbearing.jpg

Enjoy.

Wade

Post by **spl310** » Wed May 18, 2005 8:40 pm

If you want to rebuild carbs, I would rebuild the ones off the car. No reason to swap stuff around and get all confused about what you have. Get some good needles from Keith.

Regarding the Solex/A cam combo, I have talked to several folks and got nothing but good reports. Apparently, the A cam keeps the bottom end you have, while the Solex carbs gives you a bit more at the top (which makes sense to me). So either setup should be good to go!