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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old November 3rd, 2008, 17:10   #16
pietch
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Will a dawes device/ manual boost controller help turbo spool up?

Anyone got any proof? i.e. Dyno Charts showing boost characteristics with and without boost controller?

Thanks!
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Old November 3rd, 2008, 17:54   #17
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not much, some spoolup can be gained with the smoke limiter, but not soo much, also, a tiny bit in the N75 map, but thats risky for spiking.. if you want soon spoolup, mount vnt turbo
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Dyno'd area, Old VNT20 setup dyno'd 192whp
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Old November 3rd, 2008, 21:37   #18
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Quote:
Originally Posted by mojogoes
I'm not sure but it maybe the Gt12
No Mojogoes, The AMF does come stock with the GT1544 wastegated turbo but I do have a couple of those in my shop right now that I am running my S/T Super 17 turbo that is producing 15 BAR-220PSI at 2200 RPM and another that is producing 3300 ft lbs of torque (at the crank) I could show you how I did this, it really is not that difficult.
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Old November 4th, 2008, 03:17   #19
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What about a N75 upgrade valve to increase turbo spool?

Or a 20psi inline check valve?

Also I do not get this boost graph on the previous page... http://users.telenet.be/rub87/rest/c.../1.4%20tdi.jpg
...the RPM and MAP axies seem to be the wrong way around?
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Old November 4th, 2008, 04:19   #20
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Quote:
Originally Posted by Rub87
NOTE: MAP and RPM are switched on the axic by axident..


Just a remap will do fine, the turbo will just not spool sooner, even if you disconnect the wastegate, the software keeps the N75 closed until about 1800rpm then by 2000rpm it's half open because otherwise it would spike.., you can only aid spool by giving more fuel in the smoke limiter.
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Old November 4th, 2008, 04:36   #21
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Thats correct rub! Requested boost is already 2000mbar @ about 1700rpm, but n75 starts to work @ about 2100rpm with 35-37% duty cylce.There isnt enough exhaust gas to make more boost unless you give more fuel nearby to the smoke limiter....

I have tested the dawes device also, it allowas to rise boost, but doesnt make it spool faster....

Greets, Alex
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Old November 4th, 2008, 05:05   #22
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Nice feedback guys!

What is the smoke limiter? Do you mean add more fuel close to smoking point?
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Old November 4th, 2008, 05:19   #23
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smoke limiter is part off mapping. depending on air/fuel ratio
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Old November 4th, 2008, 05:25   #24
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I am pretty sure min must be near the limit with its current setup... its a smokey one!
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Old November 7th, 2008, 04:37   #25
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What is max safe boost on the 1.4 tdi turbo unit? I heave head that more boost after 1.35bar is useless and may damage the turbocharger.

Also on my petrol solenoid controlled turbo car the manual boost controller brought the turbo spool down by 800rpm!! Are you sure one of these dawes devices will not help on th tdi?

Also where can I take a boost feed for a boost gauge on this car? Anyone have an N75 diagram?
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Old November 7th, 2008, 04:43   #26
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Feed for boost gauge you must take somewhere in IC piping.
Max. boost I wouldnt exceed 1.15-1.2bar, short spikes to 1.3 is ok.
The dawes device wont make it spool faster, the wastegate is closed until min. 2000rpm anyway, then the n75 beginns to open it up continously.

I mounted the dawes device on this engine last week, on first setup it made 1.5bar*g* but I reduced it to 1.2bar then. The BEGIN of boost build up wasnt reasonable changed with the valve.

greeets, alex
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Old November 7th, 2008, 04:46   #27
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Thanks ALEX... Can I not take a boost reading from a tee pice from N75 valve feed?

Also you said "The BEGIN of boost build up wasnt reasonable changed with the valve. " - Sorry I do not understand?
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Old November 7th, 2008, 04:54   #28
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I mean it doesnt spool up earlier because of the boost valve.

Yes you´re right, you can take the readind with a "T" ! There is alrady a hose going form IC Pipe to the N75. ( I was to much into VNT which is vacuum controlled actuator*g*)
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Old November 7th, 2008, 04:56   #29
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Thanks did you see my other posts regarding a second intercooler and engine de-coke?

Also has anyone put NOS on this engine?
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Old November 7th, 2008, 05:01   #30
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No, i havent seen the other posts, but i guess a second intercooler gives you quite a bit of more volume to fill up with the "little" turbo. Dont know if thats a soooo good idea.

engine de-coke?

I dont know anyone tryed NOS an the 3cyl. engine, sorry

greets, alex
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