Will you sell/ship to the US? If so, I want it!
(it has the oval ports right?)

Michael

Hey Guys,
I'm also looking for the "SU" GX manifold (have been for awhile now). Please post info on possible leads!!

As for using other carbs on the SU manifold such as real Skinner's Union carbs (MGs etc), there are a couple of things to consider. I've found that if it's an HS4, 1.5" bore it will have the correct mounting holes, ie 3" centers at 45 degrees to the vertical (or horiz whichever). But the GX manifold has the 45 degrees running the opposite directions so you have to make sure the carb pair you find run the opposite directions. To help clarify that, on the GX the bolt angles are something like \ / vs / / or \ \ for some carb setups. On the other hand, i've seen very simple adaptor plates that can be used to bolt any carb pair to any manifold. It's basically a square with 4 holes at the 45 degrees spots on 3" centers. But you still have to be careful that you can fit the carbs to the manifold if they're not mounted in the preferred direction ie with the bowls facing "out" or away from between the carbs. Also there is something else to consider. Some carbs were designed to be mounted to the engine at 20 degrees or 30 degrees, so their float bowls will be angled to keep the bowl level when the carbs are mounted. I've heard that you can replace the bushings to set any float bowl from an angle back to 0 degrees, but I haven't tried it. As for linkages, you're on your own there. I'll figure that out when I get to it!

I don't know if the 1.25" HS2's will fit without an adaptor. The 1.75" HS6's are 4-bolt carbs on 3" centers (I just measured my Z carbs). So they will bolt up but only with 2 holes and the bores won't match.

Oh one plus to using real British SU's is that they have a LOT more performance parts available. Much wider range of needles etc. That's what I've found in my research anyway (which I'm still working on...)

michael

Right L18_B110. I've been doing some searching and I've found just that.

The early Roadsters (1.6L and smaller), the GX Hitachi's carbs and at least some of the 510 carbs were 38mm (1.5"). The Z's and 2.0L Roadsters are 46mm (1.75"). That number comes straight out of the part number: The Z's are HJG46W (46mm) and the early Roadsters are HJB38W (38mm). Still trying to figure out what the "B" and "G" mean - there is also an HJL which is a 510 "flat-top" Hitachi.

So in short, my 240Z carbs will not fit on a GX manifold unless I bore the manifold. I've also found an article arguing against putting the larger bore carbs on an engine smaller than 2.0L (http://www.jetlink.net/~okayfine/su/zsus.html).

Well, for now I'm looking for some more details on which 510s' used which carbs to widen the number of interchangable parts. But in any case, I still dont' have a GX manifold anyway... still looking for one. BUt when I finish my "research" I'll post a more comprehensive report here, if anyone is interested anyway.

Michael

I think the reason the Z guys call the carbs SU's is because that's the best way to differentiate them from the flat top Hitachi's. Most Z owners wouldn't be caught dead with a set of flat tops - they generally refer to them as "boat anchors" so to avoid any confusion if they're talking about Hitachi's they shorten "SU style Hitachis" to "SU's". The one's who know their stuff know they're not really SU's. LOL Anyway, I'm getting off topic here. I'll post what I find out about the carbs.

Michael

Sorry dd - bad habit from hanging with Z folks. They all call the round-tops SU's.

I've looked at the carb link but still didn't find a solid answer about whether the carbs are the same or not. The P/N given doesn't lead to any Z car hits on google so they're probably different. I'll do some research. Thanks
Michael

Yeah I've been looking for the GX setup but they're hard to find in the US (and hard to find someone to ship it to the US from Oz). That's why I'm wondering if the size is different between the US Z model and the GX model. Maybe you only need one if it's a higher flow carb. ANyone got a spec sheet on the GX carbs? That could answer my question. I'll go look through the Tech articles to see what I can find there.

Oh yeah, and the reason I'm considering the US carbs is because I have a really nice set ready to use. Just don't have a manifold or know whether I need them both or not.
Michael

I was just thinking, the Z SU's are commonly used on 2.8-3.0L L series engines, so would a single Z SU carb work on a 1.4L A series engine? Would duals be too much for a 1.4L? I don't know how the GX dual SU's compare to the Z SU's - are they smaller? I'm considering doing a custom intake to use my Z SU's on my A14 but I dont' know if I need one or 2.

Hey kegs, you may be onto something there!! Anyway, congrats 1200, and good luck putting it to good use both for your career and your fellows dat freaks over there. Michael

Hey Leosnake, did you weld that yourself or have it done? Got a pic with the carb mounted? I checked out your Yahoo gallery.
michael

I'm interested if you'll ship to the US. Actually I just posted a thread about this very manifold. Do you have a pic? Does it fit the oval port A14 head? Here's a pic of the head I want to use it with: head Also I've got a set of carbs, but if you want to sell them as a set I'll take it if it's what I'm looking for. Thanks
Michael

ps Please send me a PM or email at "michael(at)datsunprojects.org"