[Vwdiesel] Convert 1.9TD to spark?

jester at westfailure.net jester at westfailure.net
Mon Jan 21 11:33:03 EST 2002

On Mon, 21 Jan 2002, Harmon Seaver wrote:

>   Any idea how hard it would be to convert a 1.9TD to spark ignition? I
> want to make a woodgas fueled genset with one. Woodgas needs high
> compression, so diesel makes a better base than a gas engine. I figure
> making some sparkplug inserts to fit the injector holes (or glow plug
> holes??) would be easy, but what about a distributor?

I'd say you are much better off with a gas VW head... they will bolt onto
a diesel bottom end.

The gas & diesel blocks are very similar, you can stuff a dizzy in the
diesel block (at least the 1.6) with a change in intermediate shaft.

I wouldnt use a TDI though, too expensive, and the combustion chamber is
inside the piston, a recipie for a mess with gasoline.

A 1.8 or 2.0 16v bottom end with a 8v head gives you 14:1 or so, and there
may be room to mill the head/deck the block for more... and with an 8v
head, you already have injector pockets etc.

A 1.6 diesel bottom end with a gas head may get you even more, but it
might be neccecary to have a little work done on the pistons (pockets cut
for valves or slightly dishing the tops on a lathe..)

take care,


             Fashion Twins, activate! form of: a lemming.

More information about the Vwdiesel mailing list