Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
Subforums
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My car smokes a blue fuel smelling exhaust. I am thinking of buying the z therapy rebuilt kit and trying my hand at doing it myself. Has anybody used this kit and what was your level of success.Is it easy to use and does it cover how to adjust the floats Thanks Glenn
Last reply by ajmcforester, -
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- 4 replies
- 1.4k views
I have had my Z therapy carbs on my car for a while and quite frankly they are wonderful. I have had this issue that I wonder if people can shed some light on. If I take my car out for a romp, during the first 15 minutes of driving when I rev it to 4500 slowly it pops at times through the exhaust. But if I step on it and quickly rev it, meaning I do not dwell at 4500 rpm it revs just fine and pulls hard to 6500. Now, if I keep driving around for an extended period of time this occasional popping goes completely away and I can rev smoothly through 4500 with no issues at all. I can even dwell at 4500 rpm with no issues. I wonder at times, if this is due to the manifold…
Last reply by Zedyone_kenobi, -
6-way carburetted 1 2
by H3nrY- 12 replies
- 2.4k views
hey guys, as I am a Belgian guy with a Z-car (very rare ) , I wanted to show you what has recently been done with my standard L26 original with the flattop system: http://i813.photobucket.com/albums/zz51/H3nrY_/Datsun%20260Z/P1000088.jpg and the new system with 6 Yamaha R1 carbs with special manifold and airbox: http://i813.photobucket.com/albums/zz51/H3nrY_/Datsun%20260Z/DSC01922.jpg http://i813.photobucket.com/albums/zz51/H3nrY_/Datsun%20260Z/P1000664.jpg http://i813.photobucket.com/albums/zz51/H3nrY_/Datsun%20260Z/P1000666.jpg http://i813.photobucket.com/albums/zz51/H3nrY_/Datsun%20260Z/P1000662.jpg
Last reply by 70 Cam Guy, -
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Can anyone tell me where the hoses for the fuel system go on the fuel tank and the vapor canister located in rear wheelwell behind the plastic panel. I removed these lines and hoses a few years ago when i deleted the fuel tank and went to fuel cell. now i am putting an original fuel tank back in place. need to hook up the fuel hoses and vapor lines. Was there a charcoal canister on this model when it was manufactured??? It is a low pressure system since it is 302 carbureted motor. it is a 75 500Z (280 Z with a 302 or 5.0 FORD motor)
Last reply by slyhog22056, -
- 5 replies
- 3.8k views
Saw this referred to over in the Help Me! forum. Didn't seem to be relevant to the thread and I have no emergency so I thought I'd ask here: What is a Grose Jet? And why is it apparently a better choice than a needle valve for carbs? Chris
Last reply by Jetaway, -
- 6 replies
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My car has started running very rough once warmed up - almost to a shut down point at higher rpms - rechecked my floats and they were dead on - I deceided to plug my return fuel line and that fixed the problem. Full rpm's and great responce at any speed and rpm. Here is my challange - I would rather have my return fuel line doing it's job and my railing not getting hot with sitting fuel in the railing. 1) What would have caused this error in my fuel system 2) Is it safe to maintain a plugged fuel return line I just finished a 20 mile drive and as soon as I got back in my garage I felt the fuel rail for temp - the rear section (closest to the firewall) was the hottes…
Last reply by ajmcforester, -
- 1 reply
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Just bought a set of rebuilt triple Mikuni 40 pph. About to buy some accessories on Pierce Manifolds, air filters, horns, heatshield, etc. Will any Weber Dcoe accessories fit my Mikuni ? Any recommendations ?
Last reply by spitz17, -
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I bought an SU carb setup to install in place of the current 4bbl setup. I have rounded up almost all the parts to do the swap, but am missing one of the bolts and wingnut to attach the housing. I need the 'connector bolt' that holds the backing plate to the carb that the wingbolt screws into, as well as the wingbolt and washer with the seal. One set came with the air cleaner housing and I need one more. I searched and found this thread - http://www.classiczcars.com/forums/showthread.php?t=28321&highlight=air+filter which reports they are no longer available through the dealer. I live in the Ft Worth area, and have checked with All Z's, but he does not have any.…
Last reply by Diseazd, -
- 3 replies
- 2.4k views
I broke out my Mikunis to look them over for the future install on my Z. I wanted to check out jet sizes and such to get my base line for future tweeks. I went thru great trouble to gasket match my SU's to my e88 before install and thought I would do the same for the Mikuni set-up. But WOW, i couldn't believe what I saw when I layed an extra intake gasket against the manifold. Am I missing something here or is this right? That is a huge difference-not sure what to do here guys, I just seem baffled over this. These are 40phhs by the way. Comments please.....
Last reply by 240ZGL, -
- 31 replies
- 5k views
Well I took advantage of the dyno while at Zcon this year and I am looking for advice based on my chart. The engine is hardly broke in with 800 miles, but it was running great so I thought I would see some numbers. I am very happy with the numbers based on what little time i got to fine tune. As you can see from the chart I ran lean at about 5200 with my SU's with SM needles. I am also suprised at the richness at the lower rpms since I did so well with my MPG on the way here. I did have a richness problem on the front SU before I left and I'm not sure what exhaust pipe they were reading off of. I thought the HP and torque #'s were good for the 2.4(.40 over) and the stag…
Last reply by tlorber, -
- 5 replies
- 1.8k views
I've reviewed the posts and can't find the answer. I'm wanting to change the electric fuel pump on my 73 Z to a Mazda RX7 fuel pump. What year Mazda rx7 pump should I get. Thanks in advance for your help.
Last reply by beandip, -
- 14 replies
- 2.4k views
Well, I just got my colortune in the mail and it confirms exactly what I already knew. I am rich, even with the adjustment knob all the way up on the front carb. Oh, this is on 3 screw 72 round tops Last night I checked the valve lash while hot and only had to adjust a couple of valves from the cold setting. The float seems to be set right at 23 mm from the bottom of the lid. I also synced them at 1500 and 700 rpm. This evening I tried tuning with the gunson and got the rear carb right where I want it. Even the lift the pin method is showing good on it. The front carb is another story. Even though it is rich I can only get it to run good at 1.5 - 2 turns out. I can't g…
Last reply by whamo,
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