[Vintage914Racer]

Hello all. I am a newby to these forums. I have a questions regarding my 914 race car. For quite some time the engine has been cutting out between 6000 and 7000 rpms (usually around 6300). Usually I can drive through the breaking up eventually, but often it is not worth it because I limit my shifts to 7000 rpms. The car is running a MSD igntion. At my last race at Road America (the Elkhart Lake Vintage Festival) the car started a habit of backfiring once I hit the 6000-7000rpm range. I do not know what to do nor do i know what the problem is and before I bring it in to my mechanic I would like to get some insight.

I have been told that installing a crankfire ignition such as the electromotive unit would solve my problems, in addition to giving me added performance, but before I spend all that money I was wondering if there is anything else I go look into before spending $1000-$1500. I am running a 2.0l engine with weber carbs. Any help would be appreciated.