Reply With QuoteDougal I have no idea how to do it but can you do the calculations for the BAS Vnt GT2256V??
Also isn't Lara's max power at 28 PSI not 38 PSI?
ForumSage
Now we get into turbo upgrades. Turbos capable of delivering the higher boost and airflow you need to safely get more power.
First you need to plot out your airflow demands. Then you need to go hunting through a massive library of compressor flow maps.
Like here: Big Collection of Compressor Maps
Then if you're lucky, you can find one that the points fit and which fit your engine.
If you're not lucky, you need to revise your boost and power goals to fit the available compressors.
For this one we get lucky. Here is the map for a garrett GT2056 compressor with a 55trim. I have placed the same green, red and pink dots on it, along with an extra in grey:
Some of you may recognise the name attached to the grey point. I crunched the numbers on that years ago when many were refusing to believe Lara's power claims. Suffice to say, they checked out completely. Back then he was acheiving a safe, if not completely clean, 180kw at the crank with his TD5.
That is ~424Nm at 4000rpm on 38psi boost and an A/F ratio of ~17:1.
The interesting point here is that this garrett 56mm compressor comes attached to the same GT20 turbine as the stock TD5. This means a competent turbo shop can literally rebuild your turbo (or an exchange turbo) with this larger compressor. Virtually a bolt on.
What this larger compressor cannot do is deliver more low end boost cleanly. To do that you need a VNT turbo. But VNT turbos do bring their own compromises. Not the least of which no compressor maps are publicly available.
ChatterBox
Dougal I have no idea how to do it but can you do the calculations for the BAS Vnt GT2256V??
Also isn't Lara's max power at 28 PSI not 38 PSI?
ForumSage
I don't have the maps for the one BAS use, but I'll be doing an approximation next based on a 2256. My GT2256V came from a Merc ML270CDI.Originally Posted by djam1
38psi is needed to produce 180kw remotely clean. It was years ago I ran those numbers and that's the boost figure I have from then.
YarnMaster
Is thread about tuning a diesel or getting 400nm from a RRC?
Sent from my GT-I9505 using Tapatalk 4 Beta
ForumSage
Both. Diesel options for an RRC which can deliver 400Nm.
The turbos that work on TD5's will deliver a very similar result on 200/300tdi also. But the TD5 is a more robust engine.
Master
SubscriberIf you have a TD5 and manual gearbox, Bruce Davis can give you 500Nm remapped ECM ,without any other mods.
Although will benefit with bigger intercooler and exhaust (75mm); not so high exhaust gas temps.
ForumSage
Have a read through this thread. It shows why 500Nm on the stock turbo is a really bad idea.
Master
Super Moderator & CA manager
SubscriberIf you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
ForumSage
I guess there is those that feel it totally safe and are running it, so great for them......one question, how does the R380 put up with 500nm?
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