DDK - Die Deutschen Klassiker

Mike , it can also be caused by voltage drop in 30+ year old wiring connections. Check the voltage at 2000 rpm with the headlights and heated rear screen on and you should be seeing 13.5 - 14.5 volts. If not then start looking at voltage reg etc but if ok I would suggest checking/cleaning all connec...

On the side of each carb there is a vacuum operated unit that wprks in conjunction with the speed sensing relay and the microswitch to control emissions on over-run. These vacuum units contain a diaphragm that very often has become brittle and has punctured giving rise to the spitting that you menti...

Is the performance still ok or do you experience hesitation in any part of the rev range?

Have you got Zenith 40 TIN carbs oe Webers?

Neil, the timing is only retarded on a closed throttle (idle) once the butterfly has opened up a couple of degrees the vacuum collapses because the vacuum port is now uncovered. It is a strange system but was the way they tried to keep the emissions down, presumably for the US market.........

Chris

Ok then - how high was the HC reading ?

Mike, I recommend Bob . years of experience, and a very nice guy with a genuine interest in giving you the best result for the lowest cost. Road testing and adjustment on the fly is ok but ultimately the last few bhp can only really be 'seen' on a rolling road.

Chris

Hi, What were the CO (not CO2) and HC readings? MFI run best set to about 4.5 - 5.0% CO at idle when hot - forget the OE specs for when new.
It the CO is too rich OR too weak the hydrocarbons will rise alarmingly.

Chris

Hi Neil, it is operating correctly. To set the timing you must make sure that there is a constant vacuum (not fluctuating) supplied to the distributor hose and that the engine is at OPERATING temperature, not just run for 10 mins or so - if the temperature is too low, you will set timing to what app...

Hi, looks like the engine has been replaced with a 2.4 CIS (T) or a 2.7 CIS (Sor L) but has had the 2.4S shroud retained, the kjet engines had either black or green shrouds - A mehanical inj engine wil not work with CIS.

Chris

Mike, I also have a crank that needs a regrind.

Chris

Hi, Does anyone have 3 (or more) good usable biral cylinder barrels for sale ? Height group 6 if possible but height group 5 ok too. Pistons are not essential.

Chris

Thanks guys, I have now located one from a fellow ddk member.

Chris

Wanted - Rear number plate panel in aluminium for 911 2.4s in good usable condition or near new.


Chris

Hi Mike, I fitted one to Paul Brewsters car - it sounds fantastic, even more so above 5000 rpm ! But it was much too loud and now has a cap over one of the twin outlets. You NEED to hear this exhaust though!! I am sure Paull will post a reply but if not ring me in Willesden/Sunbury. Hope to see you ...