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Absolutely correct, I have closed the fuel needles in order to have an acceptable reading of the CO but as you said fuel starvation occurred to the extent that it was not possible to accelerate properly .
The system I am thinking about will be used just for passing the MOT emission test.
Quote:
Originally Posted by n plus one
What would happen if you shut off fuel to one carb for the MoT?
Would run very lean.
Lota-A-Landy, the engine will be running on 4 pistons in a shaky manner that will intrigue the MOT personnel.
Yes a solenoid is either on or off but you can add a small needle valve inline as well for the fine adjustment, even a fish tank bubbles adjuster valve might do. Suitable vacuum solenoids are used on older emissions control systems so shouldn't be hard to salvage off something. Some early EFI RRCs used them to speed up the idle with the a/c clutch. Getting the air evenly to both carburettors may involve drilling a small fitting into each carby spacer and using a tee piece between them. If you got creative you could get a 40 - 50C thermostatic switch to operate the solenoid so that the vehicle was legal whenever it was warm.Quote:
Originally Posted by lebanon
Random pics of parts off google:
https://www.aulro.com/afvb/images/im...014/10/873.jpg
https://www.aulro.com/afvb/
https://www.aulro.com/afvb/images/im...014/10/874.jpg
Are you absolutely sure that the air chambers to each bank within the manifold are not connected?Quote:
Originally Posted by lebanon
a 100% sure, I learned it the hard way with a leaking chock system seal that fouled 2 spark plugs on each bank.
one carb feeds piston 1,4,6 and 7 and the second carb the remaining.
Quote:
Originally Posted by Lotz-A-Landies
Water/metho injection will lower emissions if you can get it right
You could put lean needles in the SU's when going for the test or adjust the needles lower into the jets. Also retarding the ignition will help. The air pump system was a cheap Solution back in Leyland's day & pumped fresh air onto the back of the exhaust valve & burnt the unburnt fuel in the exhaust system. A lot of the Jap manufactures used this system. I remember on the Mini's people would take the belt off to discount it but the exhaust gases would get into the pump & seize it & when they wanted to sell the vehicle they would have to get a new air pump & other parts.
I found this valve at the A/C hardware supplier.
https://www.aulro.com/afvb/images/im...014/10/872.jpg
The technician assured me that it will answer my need for regulating an airflow.
The next step is t fabricate thick carb spacer from teflon polytetrafluoroethylene (PTFE) resin. to be able to install small fittings as you suggested, those will be blanked and the valve taken out once the MOT is passed.
Quote:
Originally Posted by bee utey