• Hi Guest!
    If you enjoy and benefit from your participation at British Car Forum, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this banner)
Tips
Tips

weber ntuning saga continues

Share this page

well from what I have resourced, there are several versions of the 40DCOE, mine end with 151 and read the idle screws should be between 2 1/2 to 3 turns out and mine are right there, the idle jets are a pain
F6,F12,F9,F8,F11,F13,F2,F4,F5,F7,F1,F3 are the desiginations from rich to lean
the F number denotes the air bleed hole size, and then the fuel hole sizes can go from 0.3mm up to 1.70 mm, in 0.05 mm steps so getting these right can be a real pain. If you are trying to jet webers, best to buy a set of small drill bits from mcmaster carr and drill them out in .05 mm steps, so you dont have to keep ordering jets, thats what I did, and once you get it right you can order the correct jet, if you want the numbers on the jets to match whats in the carb. or do as I did and just make notes


hondo
 
yes lots of notes, but if you spent as much time as I have jetting Webers, it becomes second nature and knowing what to change out. now the emulsion tubes are a different animal, they tell you in the book what each one will do. the main ones used for TR6 are F15 and F16 but then I have F2 and F11's I experimented with. The weber book shows the details and hold locations, all they do is emulsify the gas, but at different rpm's

somewhat black magic

Hondo
 
well the new pertronix coil is installed, and I still have a hesistation and miss at 3500 so now I am convenced its carb related, so me thinks its in the accelerator jets. so I will swap them out for larger ones and see what happens

Hondo
 
Just a simple rule about Webers:

You can adjust them for low revs or you can adjust them for high revs.
You can't do both.

Cheers
Chris
 
Chris
seems that no matter what I do the miss is still there however as seen in my other thread, I have electrical issues to fix first. also I have been drilling out the jets in .05 mm increments and as a result I might have gotten a piece of brass shaving in a orifice so when I get the wiring fixed I will probably take each carb apart and clean them out, check float height and butterfly clearance for closure

Hondo
 
Similar threads
Thread starter Title Forum Replies Date
M TR6 TR6- Weber 3236 downdraft conversion Triumph 5
Celtic 77 MGB Tappet breather to Weber downdraft MG 4
R For Sale Weber Primary Venturi (28mm) for 40 DCOE Triumph Classifieds 0
K Marcos GT Weber Emulsion tubes on ethanol/E85 Kent X flow twin 40 DCOE 32 Other Cars 2
S For Sale twin Weber 40 DCOE 31 set Other British Classifieds 0
Celtic 77 MGB Rerouting heather pipe after Weber install. MG 13
S Weber carb set Other British Cars 7
TomMull Wanted Weber 40 DCOE 18 Other British Classifieds 1
TomMull Weber Carburetors Lotus 18
C MGB More Weber help needed MG 27
C MGB Which Weber DGV is the right one. MG 14
R Weber DGV Advice Requested… TVR 19
Simmo TR6 Weber Carbs and Redline Air Cleaners Triumph 1
A Spitfire Weber Carburetor Triumph 0
rr64 Wanted WTB: Weber 45 DCO 3 Carburetor Air Horns Other British Classifieds 2
J For Sale Two used WEBER DGV 32/36 carbs for Triumph TR 2,3,4 Triumph Classifieds 0
pbraun For Sale Weber downdraft Carb & manifold Spridgets Classified 3
R For Sale Italian Triple Weber Set Triumph Classifieds 1
steveg Weber balancer on HD8s Austin Healey 11
H General Tech Tripple Weber Swan Neck Manifolds for Triumph? Triumph 1
G Triple Weber DCNFs on 280i V6? TVR 1
P For Sale Weber carb/intake, header Spridgets Classified 2
S For Sale Weber Conversion Kit for TR7 Triumph Classifieds 0
H Triple Weber 45's Tipp? Austin Healey 2
JFS TR2/3/3A Weber Air Filters Triumph 7
R Pedal box clearance mod for triple Weber clearance Austin Healey 7
S For Sale Triumph Weber DGV dual Carb Set Up - $325 Triumph Classifieds 0
richie TR4/4A TR3/TR4 Weber DCOE serious fitment issues Triumph 12
T Looking for advice for throttle linkage for Weber DCOE Spridgets 2
toysrrus TR6 Weber DCO45 cost? Triumph 6
T looking for simple Weber Wisdom, and angled air horns Spridgets 1
bugedd Weber intake manifold Spridgets 4
T Understanding Weber DCOE identifiers? Spridgets 0
T Problems disassembling a Weber side-draft DCOE Spridgets 2
T Identifying vintage of a Weber DCOE Spridgets 4
T Weber for a 1275 cc engine? Spridgets 6
M_Pied_Lourd TR2/3/3A Weber Carb Installation Question Triumph 13
drooartz Leaning out/tuning a Weber on a 1275 Spridgets 20
J TR2/3/3A accelerator linkage for Weber 45 DCOE Triumph 4
krswen Comparing Weber kits .... advice sought Jaguar 4
DanLewis Weber 40DCOE - Does it need a check valve in the fuel supply line? Spridgets 4
DanLewis Side draft Weber and smell of gasoline? Spridgets 3
bthompson What fuel pressure does a Weber DGV like? Spridgets 2
W Weber/stromberg air cleaners Jaguar 3
N Spitfire Weber Carburetor Upgrade - 77 Spitfire Triumph 9
B Weber DGV Spridgets 2
TomChar Weber MCHH carbs Triumph 23
A TR6 Triumph TR6 Triple Weber carbs Triumph 9
Pythias Weber DGAV questions Spridgets 8
T Single Weber Redline carb for stock Midget 1275 Spridgets 12

Similar threads

Back
Top