Triple Mikuni and Webers
Discussions around the triple Mikuni & Weber carb setups
73 topics in this forum
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I have a l28 with mild comp cam 260s and running triple solex 44phh carbs. Here are my specs: outer Venturi 34, jet block OA , main jets 180, main air jet 220, pilot jets 57.5 it runs pretty rich under the high load areas in the mid to high range getting AFR’s around 10s and even high 9s which is super rich. Do any of you guys think I should run main jets to say 160 or 155 or 150? I’m leaning towards 160 to try first but would like some opinions. From what I know the recommended from Mikuni for a stock engine is 150 for 34 Outer Venturi Or 155 if you run larger 37 outer Venturi. Since I have a cam and full exhaust system I figured maybe a richer setting is sa…
Last reply by duffymahoney, -
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Just acquired a 260z with triple Mikuni 40PHH's and would like to learn proper tuning techniques for these carbs. I've done numerous searches for any kind of manuals dealing with the subject, and the only one I've found is the "Mikuni PHH Carburetor Service Manual." Anyone have any leads on any other manuals that deal specifically with tuning these carbs?
Last reply by madkaw, -
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Hey guys, I bought a new and never used Z Store Weber set up on craigslist and upon checking valve position for WOT, I found interference with the bolt for the throttle linkage and the throttle body. Please see attached picture. This interference is not allowing the throttle to open fully. It is happening on all three linkage arms/throttle bodies. Any suggestions? I assume these are the nuts and bolts that came with the Z store kit but have no way of knowing because I bought it already assembled on craigslist. Should I change the bolt for a skinnier one? It is pretty small already. Thanks in advance.
Last reply by DRTY_S30, -
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Hi guys, My pal just got brand new triple webers going (74 260z) and we're having a tough time getting the first carb (one closest to the firewall) to sync with the other two. When we popped the vacuum gauge into the front of each carb, we originally had a reading of "5" for the front two and "7" for the one near the firewall. After turning the screw up on the other two to "7", the carb near the firewall started reading as "10" even though we didn't make any changes to it. Any idea what we're doing wrong here? -chase
Last reply by chaseincats, -
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Just bought a 260Z with a Mikuni 40PPH triple carb setup with TechnoToyTuning 75mm velocity stacks. PO running with no air filters. Can anyone with a similar setup recommend options for air filters? Plan mostly street use. Thanks!
Last reply by shankeroid, -
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A few years ago I found the completely rust-free, orange 240 Z of my dreams. (This is the third Z that I've owned but my first 240.) It had been sitting in barn since about 1992, about 700 miles right after the previous owner swapped the engine for a 28L with a 4-speed and rebuilt it with Mikuni carbs. I have fun working on the interior, some chassis work, electronics and other "soft" stuff, but I turn to my mechanic to get this thing running right. The problem is, I bought this because of the rust-free unmodified body, but I've never had any intention to race this thing. In fact, I really just want something fun to tool around on nice days. So, I now realize that these…
Last reply by Mike, -
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Need some Help... The issue I'm having is idle hanging up around 1500. It will lower to normal (900 rpm) if I blip throttle. Getting tired of doing that in traffic. Middle carb is hanging , but only when engine is running. Carbs open and fully shut very smooth when engine off. Vacuum holding plates open?. Maybe it has to do with the balance tube on the cannon manifold. all carbs have been rebuilt. I swapped carb position and problem stays in middle carb. I heard the cannon manifold suck. Does anyone have some helpful info for me? TIA. 20190815_164848.mp4 20190815_164500.mp4 20190815_180041.mp4
Last reply by Mark Maras, -
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Photo references! Edutainment! Add your photos with descriptions of your carburetors, linkage, inlet manifolds and related parts so we have a visual reference database. So here are some photos of triple Dellorto DHLA 40 with unknown manifold (Datsun 240Z cast into the bottom of the manifold), linkage, and Warneford Design (Bap Geon) air cleaners.
Last reply by grannyknot, -
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i have rebuilt 3.1 stroker motor with brand new 45 webers. My question is what jets should i use to get the car to run good enough to take it to someone who can tune the carbs. the carbs are synced and the car runs and idles great. the car is driveable but between 1-3k it is sluggish im wondering if maybe the jets need to be changed. The 45 webers have stock jets in them. 3.1L f54 flat top pistons 89mm n42 head with big valves and race port 540/290 cam zstory full exhaust system using a stock distributor w petronix ATI damper im located in ventura county CA any help would be great thanks alot
Last reply by 240260280, -
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Im having a bit of trouble figuring out how to replace a figure 8 seal that is supposedly under the jet block assembly? This is for a Solex 44phh carburetor i believe is type 5. Apparently the figure 8 seal isn't listed on the main blow up diagram.
Last reply by fairladyz432, -
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Hope to find some time this week end to start an e-tube project. + = CO is my lathe hero!!!
Last reply by 240260280, -
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Good evening guys, So I'm back for more help. It's almost time to drive my 240z for the first time, but the clutch is stuck to the flywheel. You might remember me. I'm the guy who bought the 72 with a seized engine(that I got unstuck). I'm here because the engine has a really hard time running when engine cold. It's about 60 degrees in Chicago now . So it will start and revs to about 2500 for 2 seconds and shut off, try again and again the same thing. Over and over and over again for about 5 minutes. I'm messing with the throttle the whole time. After a few minutes of that , it runs and idle great! Other that a slight bog when I blip off idle. …
Last reply by hwyix,
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