Timing

I have a dune buggy with a 71 type 1 engine.I did a tune up,points,plugs,condenser,new wiresand cap,I also rebuilt the carb solex30-3
My problem is that set at 10 degrees BTDC stactic[009 distributer] it will not accelerate from idle without back firing thru the carb.The only way it will accelerate is with an excessive amount of advance dialed into the distributer, maybe 25 degrees, then it accelerates fine.

Any suggestions,all help will be appreciated.

A common mistake with timing is going by the engine or car year specifications. While in reality, the engine and car have nothing to do with the timing.

It's all based on the distributor. Which model dizzy you have will determine the timing.

Now the .009 is basically an industrial centrifugal distributor. Very good for constant speed/varying load requirements, such as a generator, water pump or air compressor. But not very good for smooth acceleration or power band running. Back in the '70s, VW gear heads found out that they worked excellent in drag strip applications, where there were 2 speeds. Stop and WFO.

VW streeters thought that if the .009 was favored by the drag guys, then it was good enough for street use. There are literally tens of thousands of .009s installed on bugs across the nation and world. They were wrong. There is an inherent delay in the .009 when going through the speed curve. So much so, that a lot of very knowledgable VW guys believe that the hesitation or "stumble" in VW acceleration is natural.

For every day driving, the SVDA (single vacuum/dual advance) or any other vacuum advance distributor will give much more desirable results.

But enough of the history/tech lesson, and on to your dilemma.

For the .009, static timing should be about 5 - 7.5 degrees BTDC, with total advance 30-32 degrees at 3000 RPM. Never higher than 32.

If you have to advance it to 25 degrees just to get it to accelerate, the distributor may be installed 180 degrees off.

Also make sure you have the correct ignition components for the .009. They ARE different from dizzy to dizzy. Again, it's based on the distributor and NOT the engine or car year.

Points: 01 030
Condensor: 02 086
Rotor: 04 033
Cap: 03 010
(all Bosch numbers)

Hope this helps.

One other note on timing the .009. The only way to do it is at running speed with a timing light. Bring the engine to 3000 RPMs and set the timing to 30-32 degrees.

If you don't have a degree pully, measure 1 3/4" from TDC (28 degrees) and go a slight bit further. Mark that with liquid paper (white-out) or fingernail polish. That will be right around 30-32 degrees.

Make sure the engine is at TDC. The only true way to do this is to pull the #1 plug, and use a pencil or something in the plug hole until it's truely at TDC.

Good luck.