Hans, The rubber hose tells the wastegate to limit the power so with it disconnected you will be at the highest boost possible until the overboost sensor on the Intake Manifold kicks in and cuts the signal to the ALDA. Without that line connected you should actually have more power (up until the overboost kicks in above typical wastegate pressures).
Andy On 11/26/05, Hans Neureiter <[EMAIL PROTECTED]> wrote: > > After I did a long needed valve adjustment I stumbled on a disconnected > ALDA > pressure line and fixed it. The cars performance improved drastically, ~20 > sec. for 0 - 100 km/hr to under 15 sec. > Now I discovered the wastegate pressure line broken off and replaced it, > but > this didn't make any noticeable difference. > I have a heavy foot to get to 60 mph, but rarely exceed this speed. Maybe > in > that range the wastegate function is not important. > > > On 11/25/05, Marshall Booth <[EMAIL PROTECTED]> wrote: > > > > Hans Neureiter wrote: > > > A while ago a discussion revolved around the 2,000 some rubber parts > > that > > > eventual need replacement. > > > I came across one I never heard mentioned: The hose that lets the > waste > > gate > > > know when to open. > > > Goes from the compressor outlet to the aneroid capsule on the waste > gate > > > actuator, kind of hidden under the turbo. > > > When I changed the motor mounts, I noticed the hose was broken at the > > > wastegate connection. > > > Have no idea how long the waste gate was disabled and how important > this > > may > > > be. > > > > Because the hose was rubber, there was a safety backup. It's called the > > overboost sensor on the intake manifold and when it's activated, fuel > > enrichment is shut off. This limits the power of the OM617.95 engine to > > about 70% of it's rated power so that the engine won't be damaged. It's > > important that primary limit be the wastegate as it provide a > > smooth/seemless control. When the engine is driven with a serious load > > at engine speeds much above 2000 rpm, the wastegate remains open most of > > the time, holding boost pressure to just under 1 bar and the engine is > > able to deliver it's full rated power. When wastegate remains closed > > however, the overboost control operates when boost exceeds 1 bar and > > there there is a sudden ~30% drop in power (from ~112 down to 80 hp in > > early 617.95 engines or from 120 down to 88 hp in later ones). > > > > Marshall > > -- > > Marshall Booth (who doesn't respond to unsigned questions) > > "der Dieseling Doktor" [EMAIL PROTECTED] > > '87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 > > turbo 237kmi > > > > _______________________________________ > > For new parts see official list sponsor: http://www.buymbparts.com/ > > For used parts email [EMAIL PROTECTED] > > > > To Unsubscribe or change delivery options go to: > > http://striplin.net/mailman/listinfo/mercedes_striplin.net > > > > > > -- > Hans Neureiter, Houston, TX > '82 300SD, '95 E300D > _______________________________________ > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://striplin.net/mailman/listinfo/mercedes_striplin.net >
