Manafold questions.

[zerozero]

I have a 1976 Dastun 260Z 2+2. It has the original 260Z flat top carbs ( Boat anchors)and N36 manifolds with four bolt carb holes.

Recently while in Australia I picked up a set of carbs, aircleaner and manifold as well as an unused manifold that some Dude that reckoned the were off a 240z that he crashed 20 yrs earlier.

The manifold is a webed design that look like they are off a crossflow head. They do not have space for exaust ports. The numbers on them are 41025 and the unused one is 41026.The SU looking carbs have 1G26 and Asian ISO stamped on them.

Hopefully this will mean something to somebody.

So what I want to no is which manifold number do I need to get hold of to bolt the three hole carbs to my head (Engines)

I have tried the search function and have learnt plenty, but hasnt been able to help. Any assistance would be appreciated.

I can post photo's tomorrow if that helps.

Thanks Simon

[Royce]

I have not heard of a carb manifold for the US Z like that. Pictures would be helpful. You can use the N36 manifold, in fact many consider it the preferable manifold to use with the earlier SU style Hitachi carbs. In the US it is common to swap the balance tube from an earlier manifold to eliminate some of the smog gear. But I don't know if this is necessary for a non-US N36 manifold. Anyway, the carb bodies themselves should bolt up to the N36 manifold.

Pictures of the carbs and both manifolds would help.

[zerozero]

Photo as promised. Thanks Simon

[Mike]

I asked the guys from the mailing list to review your manifold picture in the gallery. I'm sure you'll receive a few comments.

[Royce]

I took a look at the picture you attached to this thread. It is hard to see much of the carbs other than the domes. And from that all I can say is they look like SU type carbs. The air cleaner surely doesn't look like a US round top SU type carb air cleaner. It is the right color but the shape of the air inlet is totally different. And the manifold would not work on any of the US Z carb heads. The mount bolts are too far in the corners, US heads bolts are closer over the holes of the ports. Also the US Z carb heads don't have wather inlets between the rear ports. One more thing is that the thermostat housing is not part of the US manifolds and it is further forward on the head.

It also looks like there are vacuum diaphrams on both carbs. US 240Z SU carbs only have a vacuum fitting on the front carb for the distributor vacuum advance.

The linkage looks somewhat Z like. Either this is off a Z with a very different head design or a different straight 6 engine. How about a picture from the other side with the air cleaner off?

Sorry, I cannot be more helpful in identifying these carbs!!!

[Zedrally]

Hi Royce,

Simon was querying the manifold.

I must say it is interesting, I've certainly never seen anything like it and could only guess it may have been associated with a 240K or GL?

That would mean a different head to the types we are used to! Crossflow, the mind boggles......

I wonder if the SU's are actually Zed SU's?

I have seen many zeds running around with smaller SU's from SSS, with owners thinking that they where the correct ones!

Measure the head side of the carb body if you have time.

[zerozero]

They measure 3 1/4 Inches.

thanks

[Zedrally]

Oh my god the're inclined as well!

Absolutely got me, wonder if they might be zed SU on a manifold for another manufacturer? possibly English????

After all no one said it was a 240Z that crashed!

[Royce]

Well, those are certainly not US Z Hitachi SU carbs. The carb bodies are very, very different. I am pretty sure that they are from a non-Datsun vehicle but don't know what they might be from. But hey! That doesn't mean you cannot get them to work on a Z. But you will likely need to get them to mount to a Z manifold.

[zerozero]

Ive posted more photos and are awaiting approval.

Its beginning to look like the boats going to be sercure with two sets of anchors!!

Thats very much for your help.

Regards Simon

[Royce]

Oh, I wouldn't say that at all. If you cannot make these work on a Z than they would certainly be valuable to someone. I would think much more than the "boat anchor" US flat top carbs. I have also heard of people using British SU carbs on Z's with good success. I'll have to take a look at my Ztherapy video again to see if he shows carbs like these. I am pretty sure he goes over British and Volvo SU carbs.

[Z Kid]

Is there any reason these carbs wont bolt onto your boat anchors manifold?

[Zedrally]

Originally posted by Royce

Well, those are certainly not US Z Hitachi SU carbs.

I must be missing something, why aren't these carbs Hitachi's?

What do other''s think as I think they are!

I had thought that the original question in the tread was what head did it fit on?

I would think that you could safly say not a Nissan one, but what?

[Z Kid]

I would think that they are the later british su's, when you look at the side on pic in the gallery, they look more like the integrated(non bowl) pommy ones than the jap hitachis. As to what they came off, no idea, maybe a big healey or triumph?

[zerozero]

Hello Z Kid.

The mystery carbs wont bolt onto the standard N36 manifold as there are three mounting holes in the carb and 4 on the standard manifold. I dont think they are British as they have ASIAN ISO in the casting on the side.

Thanks Simon

[Leeroy]

If you're there ALAN, we beckon you to visit us and to help us solve this problem....all hail ALAN!!! :stupid:

Cheers ppl!

[Victor Laury]

That air cleaner is so very, very Nissan-ish. I can't think of another Nissan inline 6 except the P motor from the Patrol. But, that was fitted with a single carb and a Huge round upright can air filter and was mounted on the passenger side of the engine.

[Gav240z]

Well I can confim that does not looking anything like a Z manifold at all. I see one in my garage everyday so I would confirm not a Z manifold. The air cleaner does look Nissan ish but it's alot shorter than the 240z one.

Best way to check the Hitachi British versions I'd say would be check the mixture nut at the bottom of the carb. If it's a nut I'd say it's British and if it's a Hitachi it should be a nice circular knob like a Television one that's nice and easy to turn.

The linkage does not look Z like.

Unfortunately I'm no SU expert still learning but the only differences between the SU's sold on the US version and Australian ones are:

The 73 mdl US Spec had additional emission controls and valves where as the Aus spec ones were pretty similar all the way thru 70-70..

Feel free to correct me here.

[Zedrally]

Quoting from the other uploaded photo in your gallery [looking in with cover off].

Whilst the aircleaner is Nissanish, it's definately been hacked up to get these SU's to match, and not a good hack either!

So what do we now know.

1. Air cleaner possible Nissan.

2. Manifold possibly British.

3. Definately not a L24/6/8/ series head.

4. Opinions vary as to the SU's [Hitachi or British or whatever].

5. No one has any idea what type of car/motor these where fitted on, but I would be inclined to think British.

Anyone for a game of darts!

[26ounce]

My wild guess would be that the manifold came off an old Toyota Crown. One of the "sports" models came with twin SUs on a straight 6. The motor had a crossflow head which seems to match your manifolds appearance.

[HS30-H]

Ah,

Mr 26ounce is starting to get very close.................

zerozero - that's "AISAN" not 'asian' cast on the side of the carb bodies ( It wasn't only Hitachi that licensed the Skinners Union patent for Japan........... ).

Aircleaner box is not original ( at least not original colour ).

Who's going to take the crown?

Alan T.

( sorry to be so cryptic, but I'm three sheets to the wind and its time for bed ).

[Zedrally]

Ah so Mr Toyota!

So they had a cross flow head on a 6!