Quote:
Originally Posted by rhodes2010
But at 9lbs I still do not worry about overboost.
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Quote:
Originally Posted by eatont9999
I have not been able to boost over 10Lbs under any condition, so you should be fine, too.
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It's not a question of how much boost the turbo can produce with a functioning wastegate, it's a question of how much boost the engine can survive if the wastegate actuator fails. To quote from
Selling or parting 350SD
Quote:
Originally Posted by vitop
Well, unbeknown to me, the car had a crack in the vacuum hose from the turbo to the wastegate. My son decided to see how much power it had and floored it. The turbo overboosted (luckily the overboost protection kicked in and the car started cutting fuel and jerking). As soon as he came home and told me that, I knew I had a bad hose.
I replaced the hose and everything was fine and my wife took it to work the next day and called to tell me that the car was making a lot of white smoke.
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The quote is condensed for dramatic effect. Hopefully the engine is fine. If not, hopefully overboost protection limited the damage.
Quote:
Originally Posted by tjts1
Engine overload protection was eliminated in early 90s on 60x engines.
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Umm... no. The simple overboost protection solenoid was unneccessary because EDS had at MAP sensor input and
vacuum control of the wastegate actuator. With vacuum control, EDS can and does limit boost under other conditions than just overboost some which have nothing to do with safe engine operation. Disconnect the vacuum line to the EGR valve actuator and see how much boost EDS allows.
Most of us know our cars and have the sense to realize that a sudden burst of power can be as much a problem as a sudden loss of power. It's your car and you'll do what you want but do so in an informed manner.
Sixto
87 300D