Twin Su's

[L24_skyline]

hey guys

i picked up twin su's for $80 and was wonderin is it a bolt on mod or wat? I also pick up a full parts car for $450 it has 4 good shockys (that i need), 5-speed gearbox, and descent interior, also got spare head and block,i got thrown in was efi manifold, spare su manifold, fuel rails, 2x 240k tail lights.

[blind_elk]

The SUs should bolt straight up.

Which SUs? If they are from a 260Z, then you've done your dough - they are about as useful as an ashtray on a motorbike. 240Z, on the other hand...

[66 skyline gt]

easy wat to tell if they are 240' carbs.... the have a dome top, while the 260' have a square shape top, and i garre with blind elk, if they are 260' carbs ya done ya dough.... they are crap carbs... i gave my last set away, they are that useful!

[coupe72001]

I was running a set of the 260Z carbs ( I got them free - no surprises) on my C210, and they went like the clappers, until I ran the car low on fuel and fouled them up.

A lot of the complaints about these carbies are they are a pig to tune (many carbie places won't even touch them!), and they suffer from vapor lock issues when things get hot. My theory is due to the bigger grill the under-bonnet temperature of the C210 may be lower than that of the 260Z, so this may be less of an issue for you.

I don't expect anyone to back me up with this, they are a generally much hated carby, but if you already have them, give them a go. Worst case you'll have wasted a few hours and will have to put the single carb back on...

By the way, they do bolt straight up, but from memory you will need to modify your linkage and block off a few loose hoses. Actually, now that I think about it, getting them on and off was a bit of a pain.

Finally, if you have the 240Z carbies, then I wouldn't hesitate to get them on there; all the fun, with potentially far less grief.

[L24_skyline]

heres a pic, they came off another l24 so i would be able to tell u the car they came off, yeah i had to mod the acc cable, and a few loose hoses are there.... is there much of a power gain or is it just a fuel guzzler wen richened???????

[blind_elk]

Yep, those look like the 240 carbies.

It should run better, and more economically, because the twin manifold allows the engine to breath a bit easier.There should be a small cogged wheel on the underside of the carby that allows adjustment of the fuel jet for setting mixture. The 260 carbs didn't have that adjustment.

[Alfadog]

I don't think they are 240Z carbs, or 260Z carbs.

Edited September 12, 2006 by Alfadog

[coupe72001]

Alfadog is right. The neck on top of the dome is longer on the 240Z carbs. They are definitely not the flat top 260Z carbs... Triumph maybe?

[aarc240]

English SU's.

Provided they are reasonanly set up (right needles) they should work fine.

Bolt them on and try it - I have a pair like it on a 260Z and it's OK