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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Remapped 320d boost?



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      12-27-2013, 12:44 PM   #1
Leah1
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Remapped 320d boost?

What boost pressure should a remapped e90 320d be making on full throttle ?
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      12-27-2013, 01:27 PM   #2
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I cant help but I would have thought it depends on the map
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      12-28-2013, 04:12 AM   #3
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Doubt this is a great deal of help but my e-mapped 330D has a max boost of 1.6Bar. I think standard max was 1.4 so I guess you might expect 0.2 above your normal.
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      12-28-2013, 04:56 AM   #4
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Peak boost and holding boost are very different!

1.6bar sounds a lot of boost to me, too much in fact!

From previous non bmw high powered turbos 1.2-1.4bar was maximum without a lot of engine work!
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      12-28-2013, 08:44 AM   #5
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Seems ok then my mapped 320d is holding 1.5 bar
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      12-28-2013, 02:37 PM   #6
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Quote:
Originally Posted by Alex.J View Post
Peak boost and holding boost are very different!

1.6bar sounds a lot of boost to me, too much in fact!

From previous non bmw high powered turbos 1.2-1.4bar was maximum without a lot of engine work!

Your probably talking about petrol turbo's

Diesel turbos run mega boost!

My old fabia vrs diesel was kicking out 2.2bar
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      12-28-2013, 02:48 PM   #7
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I always thought diesel ran smaller, lower pressure units!

Strange!
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      12-28-2013, 02:51 PM   #8
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Oooooo no. Allot of diesels run lots of boost. That said. Deisels are typically low boost engine. . Someone correct me if im wrong but I think the reason deisels are now running whopping boost is because the compression pressure needed to ignite diesel oil is so high that the more boost produced the more controlled and better the burn thus creating better power??

Last edited by CustomColours; 12-28-2013 at 03:00 PM.
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      12-28-2013, 02:52 PM   #9
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I had a golf tdi same engine as the fabia a 130 hp engine well that remapped runs 25 psi of boost. Our vans at work run around 2 bar of boost. It's petrol engines that run smaller boost pressure depending on engine size.

I have not got a clue what my 330d runs but it's about 1.5bar I think
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      12-28-2013, 06:11 PM   #10
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Quote:
Originally Posted by Alex.J View Post
I always thought diesel ran smaller, lower pressure units!

Strange!
Darkside developments are running 63psi in their 500bhp tdi iirc
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      12-29-2013, 09:55 AM   #11
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Quote:
Originally Posted by CustomColours View Post
Oooooo no. Allot of diesels run lots of boost. That said. Deisels are typically low boost engine. . Someone correct me if im wrong but I think the reason deisels are now running whopping boost is because the compression pressure needed to ignite diesel oil is so high that the more boost produced the more controlled and better the burn thus creating better power??
That would make sense! Im obviosuly stuck in the dark ades with diesels being small turbo small boost! suppose that explains great lag in diesel engines now days!
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