Perhaps its sucking oil past the valve guides/seals? A leakdown test could help confirm this by filling the chamber with air and using a stethoscope to listen for where the air is going (up or down) Also you could see how quickly the air is leaving the cylinders.
Stefan -----Original Message----- From: Marc Medina [mailto:[EMAIL PROTECTED] Sent: Monday, December 13, 2004 5:01 PM To: Mullikin, Stefan P; Brian Schulteis Cc: SDML Subject: Re: SD> problems and questions Yeah, but if a piston is melted, then wouldn't I have a bunch of blow by shooting out of the oil filler cap, pushing up the dipstick etc.,??? Also, wouldn't it smoke like hell when you get on the gas? Why does it only pour smoke at idle, and smoke some on decel? Thanks, Marc Medina www.pnw-sdac.org 89 Spirit ES 2.5 Super 60 Intercooled Turbo http://www.geocities.com/mcm95403/ <--- updated 11/12/04 "Americans have the right and advantages of being armed-unlike the citizens of the countries whose governments are afraid to trust the People with rms" -- James Madison ----- Original Message ----- From: "Mullikin, Stefan P" <[EMAIL PROTECTED]> To: "Brian Schulteis" <[EMAIL PROTECTED]> Cc: "SDML" <[EMAIL PROTECTED]> Sent: Monday, December 13, 2004 4:54 PM Subject: RE: SD> problems and questions > They are stronger than cast, but they aren't impervious. Do you have > any idea what happens in a combustion chamber that is pinging at 25psi > of boost? The kinds of forces going on will shatter a cast piston, > while a forged will simply melt, possibly allowing you to only replace > that piston, associated rings and gasket then get on down the road. A > shattered cast piston or *shudder* hypereutechnic (Silvolite) will break > like glass is there any hint of detonation going on and will likely > destroy the cylinder wall. > > So 25, 30, 40, 50 psi conceptually could be run provided you're tuned > properly. There are physical limitations of course so that's not all > that probably in the real world, at least not for very long. If his > calibration is only configured to run to 15psi and he's over shooting > that there is a possibility that he melted a piston from running lean. > > Best Regards, > Stefan Mullikin > Portland, OR > Co-Founder > PNW-SDAC > http://www.pnw-sdac.org > 1980 Fiat X-1/9 > 1984 Dodge Rampage 2.2 > 1987 Dodge Daytona Shelby Z > 1987 Shelby CSX #106 > 1988 Shelby CSX-T #3 > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Brian Schulteis > Sent: Monday, December 13, 2004 4:46 PM > Cc: SDML > Subject: Re: SD> problems and questions > > What's the point of a forged piston then? They wear out way faster, you > say they can't take abuse.. What's the point??? > On Mon, 13 Dec 2004 18:09:52 -0600, Jason Arroyo > <[EMAIL PROTECTED]> wrote: > > You can frag a forged piston real quick if you are boosting out of > > tune enough. -----------------------REMOVE-FOOTER-WHEN-REPLYING---------------------------- Questions? Visit http://www.sdml.org/ To be removed, visit http://www.sdml.org/pages/leave.html
