Bruce, I run heavy water injection in my single turbo car. I inject onto the compressor wheel in the hopes that the water would be atomized there and cool the entire intake track into the engine as well as helping to control preignition. I monitor the intake manifold temperature and see it drop dramatically with extended boost, as when climbing a long steady hill. When I run out of water, performance drops and preignition immediatly shows up. At first I used a boost pressure switch to initiate water flow but found it was to little too late. Now I have a throttle plate microswitch that is set to immediatly get the water flowing any time I give it enough throttle to get positive boost. It seems to have worked well for the last ten years and the plugs always look good. I have not had anything apart to check on carbon deposits. BTY I use Mobile 1 sinthetic oil. I have eliminated the cat and run a single transverse glasspack muffler. Only on one occasion have I noticed exhaust smoke on startup. I will start trying to monitor it better and report in the future. Don Ekhoff 2097 ----- Original Message ----- From: "B Benson" <delornut@xxxx> To: <dmcnews@xxxxxxxxxxxxxxx> Sent: Wednesday, August 07, 2002 2:52 PM Subject: Re: [DML] what kind of turbo? > Any oil introduced to the combustion chamber will create a carbon build up > on the valves, pistons, and cylinder head. The results will be an increase > in the compression ratio and a tendency to create pre-ignition because of > the retained heat in the carbon deposits. Both are arch ememies of > turbocharged cars. > > Bruce Benson > > > >He maintained that if you read the > > label and it stated that it was refined from "paraffin based" crude that > it > > would burn clean (like a candle). I didn't question it at the time but it > > seemed to work just fine. Maybe it would work equally well for our oil > > burning turbo cars now? > > > > Don Ekhoff > > > > > To address comments privately to the moderating team, please address: > moderator@xxxx > > To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >