That's probably the case for the vacuum/boost controls upstream of the wastegate, but the version I have had a boost hose running directly from the turbo to the wastegate, and it allowed me to run over 16 psi boost--that is, before it began dumping copious amounts of oil into my exhaust stream (long story - bad rebuild). It's definitely a later model turbo because it doesn't have the ARV incorporated into the inducer housing. But like you said, there are lots of little changes between the engine series. I suspect those challenges are easily overcome by determined DIY-types, but the engines aren't direct drop-ins in any case.
On 7/19/06, Marshall Booth <[EMAIL PROTECTED]> wrote:
The wastegate opens on '90s Mercedes diesels when there isn't proper EGR function or if there is excessive boost sensed at the intake manifold (I believe). In the '80s OM603.96 engines brought to the US the wastegate ONLY opened when boost pushed the wastegate open. LOTS of little differences. The computers are VERY different. Casey
Olympia, WA Biodiesel: "I drive in a persistent vegetative state" '87 300TD intercooler #22 (216k) '84 300D (214k) Gashuffer: '89 Vanagon Wolfsburg Edition (187K) http://users.zhonka.net/zeitgeist/Misc/IMG_0171.JPG
