DDK - Die Deutschen Klassiker

hi guys
i have installed a 2.4t 911 engine in a baywindow camper but have flat spot trouble when the engine is idling on tickover it runs a treat but when i press the throttle a flat spot accurs for a split second then the engine revs quite happily also when i blip the throttle a couple of times it stalls , the engine has weber carbs that have been rejetted ,a bosch dizzy with a msd 6al box , a facet fuel pump set at 4 psi, new points ,new condenser,new rotor arm ,and cap all the plugs & leads are new
any help would be much appreciated
cheers
andy

Hi,

Sounds like the accelerator pumps are not working or are set up wrong. If you look down the carb throat (if possible in a camper installation?) you should see a squirt of fuel at each venturi when you open the throttle.

The other thing I found with my Zeniths (similar to the webers I understand) was that if set up too lean at idle it would fluff and almost die when you blipped the throttle. Open all the idle mixture screws a couple of turns and see how you get on.

Most likely it is the accelerator pumps though. Have a look at the Zenith info on my site and it should point you in the right direction for set up.

Sounds like a cool camper, any pics of the installation?