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+--- Thread: om605 w460 G wagen (/showthread.php?tid=7034)
om605 w460 G wagen - Drbiehl - 02-07-2016
Hello there, this is my first post in the forums. I've been reading through a lot through the posts lately and have ultimately resolved to post my own questions. I recently bought a 460 G wagen with a turbo om605 abd 717.460 in it. The carruns well in low rpms but struggles in the upper band. It will do 50 on flat surfaces. I don't think it even gets close to the 150hpitshould be producing. It lacks engine braking and when floored, gives out a little black smoke through the entire rev range. It has a rebuilt (2 months ago) Gt25c. Pump is om602, but I'm not sure about element size. My guess is retarded ip timing. Any suggestions would be greatly appreciated.
RE: om605 w460 G wagen - Drbiehl - 02-08-2016
I forgot to mention, there quite a bit of white smoke on startup, but no rough idle. The EGR is deleted.
RE: om605 w460 G wagen - Petar - 02-08-2016
Yes that definitevely sounds like someone who didn't know what he was doing tampered with the IP. Black smoke and lack of power suggest wrong timing. Even with 0 boost the 605 should get the g wagen to at least 100kph. The reason that it won't return to idle is the adjustment of the pump although that shouldn't be relevant. After you fix the power problem i can explain in detail how to fix the return to idle.
RE: om605 w460 G wagen - Drbiehl - 02-09-2016
Awesome, thank you very much. I'll take down the pump this weekend and adjust timing. Factory specs are pump at tdc and cylinder 1 at 14º ATDC. Should I set it to stock settings or advance to 11 or 12 ATDC like most superpukps run to allow more time for the combustion to take place?
RE: om605 w460 G wagen - Petar - 02-10-2016
Could also be a problem with lack of airflow, either clogged intake or exhaust.
RE: om605 w460 G wagen - Drbiehl - 02-10-2016
I really doubt it. The turbo was rebuilt 2 months ago and on installation all manifolds were cleaned. I will check the exhaust just to be sure but it was also cleaned. Wouldn't reduced airflow increase EGT a lot by highback pressure and incomplete combustion?
RE: om605 w460 G wagen - MrHope - 03-16-2016
I have done a w460 build with om605, it has a gt20 as original.
Used a rebuildt om602 pump with 6mm plungers.
Easly spinns tires when giving full throttle,
1,5bar boost, guessing close to 200hk.
Maby your pump is one the wrong stroke? Its a 50/50 chance it gets wrong if you are not sure how its done. The car will run, but not wery good.