Carburetor Central
If you have questions about the SU Carburetors, this is where you can find the answers.
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During constant running, I'm getting a steady drip coming from the mechanical fuel pump. Its gas coming out of the two tiny breather holes on the bottom half. (I can plug one and watch it escape with more pressure on the other side). Now before I go sourcing a new one out, I was wondering if any of you experts ran across this, is it something I can remedy by making new seals for the pump itself?
Last reply by impulsive, -
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- 23 replies
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OK, I searched the archives and didn't find much that helped me, so I'm asking here in hopes ya'll can. I want to check and/or adjust my float levels on my 72. The three manuals I have are pretty much useless, since two of them skip the issue and the other has a useless measurement from the top of the gas in the bowl to the inside of the cap, with the float in and the cap screwed in place. How in the heck are you suppose to measure that ???? In any case, I don't know if they are currently set correctly, but I do know that when I pulled the floats out of the bowls the level of the gas at the bottom of the bowls was around .95" - .98" deep. How does one go about adju…
Last reply by Alan O, -
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I wish I had a photo, but it's too soon - I only got my car back from the mechanic last night... Brand new TRIPLE WEBERS on a TWM manifold, fitted and tuned~ Here's some info. for the punters out there considering a triple carb set-up (especially Webers), because I never found a "comprehensive" thread on the website that gives enough info about the topic. So here goes: RESEARCH: The cost of Weber carbs varies greatly between different suppliers, wholesale and retail. I don't want to give any wholesalers or retailers a free "plug" here, especially because I didn't purchase through any. But I did do the research before I bought mine privately, and the price varies a…
Last reply by Curtis240Z, -
- 15 replies
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Hey so I don't know that much about cars so don't kill me if this Q is dumb. I was wondering what the benefits of switching out my SUs with triple weber carbs. What are advantages and disadvantages. any help would be great thx.
Last reply by Zs-ondabrain, -
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I have SU carbs on my 72 240z with a an L28 swap. I tried looking all over the forums for the past few days without much luck. Here's my issue: Once I start the car it will idle fine for a good few mins. It will even rev as high as I want it to, but all of a sudden it would just shut off. After a few starts I was able to isolate that this is a fuel issue. I sprayed carb fluid into the carburetors and the car would stay running. Once the fluid runs out it would die. As soon as it dies I can restart the car back up without a problem. I also checked my fuel pump, it seems to be pumping kinda weak. (have a holly eletrical pump) I disconnected the fuel lines to the carbs and …
Last reply by boostedzed4, -
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I've been looking for velocity stacks now and was recommended pierce manifolds. They have two styles available with two very different prices. What are the pros and cons of flange mount versus the insert type? The one that mounts outside is almost half the price. Flange Mount Insert Mount Thanks!
Last reply by Esc8p2NeverLand, -
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Are the Bob Sharp set ups any good.And how do they perform?? I am thinking of swapping out my su carbs and putting one on my 240z.I see one just sold for $349.99 on ebay.Here's a photo..I would really like to know what some of you think.Thanks again.........................................................Matt
Last reply by Walter Moore, -
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Ok hers the deal.got a 240z with a l28 motor.it ran pretty good when i got it but way to rich.so bad i couldnt stand the smell...so...i bought a ste syncronizer and a color tune.i have the carbs. Pretty close now...they were way out of sync.only thing is it runs like crap know..seems to be popping alot through the exhaust.and stalling out on take off.the front carb fuel adjustment had to be turned all the way up to get the color tune blue..and i will also say it was hard to get them both in sync. At an accceptabal idle..actualy i couldnt even use the idle screws on the linkage because it would idle to fast...are the carbs sopposed to open at the exact same time.because th…
Last reply by segdoh, -
Looks like it. Looks like more than a simple gasket is required.
Last reply by Mikez73, -
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Hi I recently made a post about my 240z carb behaviour in Engine section http://www.classiczcars.com/forums/showthread.php?t=38755 Now i'd like to know how to tune this carbs without flowmeter. After reading all the posts made by this community i think it's running too lean. What's the most safest way to make it run richer without messing up carbs more? Also i'd like to know the reason why it occasionally puffs out white smoke from carbs after car is shut down.
Last reply by Carl Beck, -
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I was rebuilding my carbs today and removed the needle and seat assembly to replace them and noticed the size of the needle in the assembly I removed was larger in diameter than the replacement. I then noticed a "2.0" engraved on the side of the one I removed. I then blew air through them both and the old one allowed more air through than the new one. I understand that the needle and seat assembly regulates the fuel to the float bowls and cuts it off when the floats rise. My question is this: If I use the new, smaller needles and seats am I going to be starving my carbs of fuel? The old ones are in good shape and open and close perfectly so I could put them back i…
Last reply by JohnnyO, -
- 13 replies
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While the tank is out, I'm cleaning up the straps. I'm going to use gasket material for the padded side. For the adhesive, should I paint the padding side of the strap before gluing the gasket material into place, or leave it bare metal? I figure the 3M black adhesive will work well.
Last reply by dankfrye@charter.net,
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