914 throttle lag, mag rpm drop

Hello Emil

I have seen this on the type 914 before.  Normally it just needs a bit more fuel in the 4000 RPM range.  (needle adjustment) The high mag drop suggests a lean burn so move the needle clip one position to enrich the mixture and try it again.  Not all 914 need this but the high mag drop suggests your engine does.  Overall running will not change but the hesitation should improve.  

Cheers 

I moved the 2-4 carburettor needle one position richer and the mag drop improved. Thanks for the help on that!

However, there's still that lag when throttling up sharply from lower rpm(2000). Not that noticable if you throttle up above 3000rpm. Tried adjusting the idle mixture but didn't notice difference.

The lag in throttle response may not be the engine, but your throttle system. Double check this to rule it in or out.

Emil Lomliev wrote:

I moved the 2-4 carburettor needle one position richer and the mag drop improved. Thanks for the help on that!

However, there's still that lag when throttling up sharply from lower rpm(2000). Not that noticable if you throttle up above 3000rpm. Tried adjusting the idle mixture but didn't notice difference.

Advancing the throttle up sharply will definitely produce a lag in response! This is normal as the Bing carbs don't have an accelerator pump to pour more fuel in. Also, a turbo takes a while to spool up when first applying power. I have a turbo in my car and it definitely accelerates faster if I slowly advance the throttle.