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Date: Mon, 21 Dec 1998 01:19:15 +0100
From: "Ivar Finnvik" <ivarfinnnopsam.com>
Subject: Re: Turbocharged Engine pings under boost


Chris Wilson skrev i meldingen ... >In article <75jl41$30c$1nopsamme.online.no>, ivarfinnnopsam.com says... >> >> Chris Wilson skrev i meldingen ... >> >In article <36854b94.359059810nopsam.preferred.com>, >> >You could drop the CR,by machining the pistons or the head >> >chambers...time consuming,maybe a full engine strip >> > >> Remove head and install two headgaskets! Sounds crazy, but works. > >Hi Ivar.Take your point,but on a blown engine they are a bit >suspect.Naturally aspirated engines rarely have a problem running dual >head gaskets,but I have never had much success on a turbo engine,they >always seem to let go across the fire lands. > >Of course,it may well be worth a try.. ;-) > Since this is a Volvo newsgroup i want to tell a little curiousity. On the scandinavian market Volvo themselves produced a bolt on turbokit for the B19-23A engines. In some of this kits two headgaskets was included to lower the comp. ratio. I have used this solution on only one car, a VW Golf GTI turbo. It produces 186,7 HP (dyno) and has now runned 56K kms. with double head gaskets. The main reason for a head gasket failure is lean A/F ratio and/or bad ignition curve and of course to high boost pressure combined with low octane fuel. Ivar Finnvik Norway

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