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Engine faltering under acceleration

22nd Nov 2011.

I fitted the electrics to the rear of the buggy using the coiled wire protectors I had purchased . This gave greater protection to the wiring . With the engine rebuilt I still been having problems with acceleration that had been dogging my new engine for some time . I had tried replacing engine parts to solve this but to date had had little success. The problem was still alluding me and several friends could not resolve this problem either. It had been a busy month with other activities so I was unable to spend as much time as I wanted to.

I replaced the fuel pump with a new fuel pump regulator and pressure gauge in an attempt to see if there was a fueling issue that was preventing fuel reaching the twin carburetors. The fuel pressure was correct and providing 2.5-3 psi on the gauge. I pressure tested the heads and they all came out the same over 980 lbs on each cylinder suggesting I had good compression.

I tried swapping the distributor to see if my 009 distributor was failing this did not improve the situation.

I know I am running 32 Venturi in my DRLA carburetors and am now wondering whether my poor running is because of this ? I rang VW Heratige who told me that the 32 Venturi where better suited to a larger engine they suggested running 30's. I would have to see if I could locate some replacement Venturi/ Chokes to see if this was the fault.

** Photo of Dellorto DRLA 40 Venturi/ Choke provided by courtesy of www.Dellorto.com