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Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion > Diesel Performance Tuning

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  #16  
Old 07-18-2014, 09:20 PM
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Quote:
Originally Posted by scottmcphee View Post
Isn't this the job of a wastegate?

I put a manual wastegate controller on my car because the spring was getting soft and this held it closed until a certain dialed-in boost pressure was reached. My turbo spools up a little quicker as a result...

The stock Garrett I'm sure is good for 2 bar...easy. If only I could deliver as much fuel as is needed for that...
Waste gates do not lessen the time it takes to reach full boost.
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  #17  
Old 03-02-2018, 06:38 AM
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No one has tried a quick spool valve with the 617-95X?
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  #18  
Old 03-05-2018, 05:38 PM
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Quote:
Originally Posted by MTUpower View Post
No one has tried a quick spool valve with the 617-95X?
I think I am going to go that route with a s200g turbo.

My current thinking is to set the valve to get the turbo to come in when I want it to and control it with EMP.

The internal wastegate will control boost limits.

I do not like the two piece valves (where the shaft and butterfly are two separate pieces), and have been thinking of how to build a one piece valve into a spacer plate. I am almost ready to sit down and start the drawing phase..

OEMs are using this method to improve low end turbo performance, so it is not an unknown thing. I think it is the best of both worlds if set up properly, (early boost with high turbine flow capability)

I have not seen anyone using one on a MB of any kind.

I will post what I come up with.
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  #19  
Old 03-06-2018, 06:32 AM
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I just bought a 617 block with the wagon head and will be altering the head for better air flow, and using the prechambers after drilling them out to larger than my current altered ones. I think I'm going with a td05 turbo and 3 inch exhaust as well- but want it to spool sooner. My OM648 is awesome with that in the CDI; it pulls hard from 1300rpm on up. The td05 doesn't have a divided housing so I don't think I can go that route of the quick spool valve. 24 volt electric supercharger? IDK but ...
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  #20  
Old 10-17-2018, 03:12 AM
jabroni tig weldor
 
Join Date: Oct 2018
Location: whales vagina
Posts: 43
Quote:
Originally Posted by scottmcphee View Post
Isn't this the job of a wastegate?

I put a manual wastegate controller on my car because the spring was getting soft and this held it closed until a certain dialed-in boost pressure was reached. My turbo spools up a little quicker as a result...

The stock Garrett I'm sure is good for 2 bar...easy. If only I could deliver as much fuel as is needed for that...
this so far is the most grounded/practical response. well except for the part about a tiny garrett doing 30 psi lol. i wouldnt want one of those above 20, probably just hot air above that anyways.



diverter valves dont make more boost. they make the same boost sooner but even then its at the expense of having more drive pressure. the easiest way to get more boost is to trick the wastegate. either mechanically with a hole in the boost elbow or electronically with a controller as stated above.
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  #21  
Old 10-17-2018, 03:13 AM
jabroni tig weldor
 
Join Date: Oct 2018
Location: whales vagina
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Quote:
Originally Posted by MTUpower View Post
Waste gates do not lessen the time it takes to reach full boost.
they do if the spring is old and sloppy. what he did makes more boost, but also makes better boost cause the wg leaks less.. which equates into faster spool.
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  #22  
Old 12-21-2018, 09:54 PM
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Quote:
Originally Posted by MTUpower View Post
No one has tried a quick spool valve with the 617-95X?

Quick spool valve requires a divided inlet turbo, which the 617 does not have.
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