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Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI Power Enhancements

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 9th, 2008, 13:29   #46
TheoSweden
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pietch:

Why dont you read the thread before you write in it?
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Old November 9th, 2008, 14:12   #47
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TheSweden:

" bigger VNT (like VNT20 maybe) and ECU program from a Audi A2"

I don't think it is that simple... is the boost control system/ loom different?

Is that what you mean?
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Old November 10th, 2008, 02:05   #48
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Quote:
Originally Posted by pietch
Basically the problem with the 1.4tdi is a limit with the max tunable parameters on the ECU... the tuning box bypass these and apart from the soot the results are a totally transformed car!
????, don't unterstand that one..
Everything what's possible with the engine you can do in the ECU software..

With good software you can get a bit better spool from low rpm.
But it still is a really really small wg turbo.
The best is to adapt a VNT from 90 hp version or KP39 like Rub said.
Better flowing turbo will do good for your mpg's to.

Johan
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Old November 10th, 2008, 02:21   #49
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Turbo Johan:

Regarding: "Basically the problem with the 1.4tdi is a limit with the max tunable parameters on the ECU... the tuning box bypass these and apart from the soot the results are a totally transformed car!"

Basically the max limit the ECU will allow for fueling is not as great as the digital tuning box can allow.
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Old November 10th, 2008, 02:57   #50
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Lol, why not? use a other N75 and 90hp software

You won't get earlier spool if you stick with a non-vnt turbo..
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Old November 10th, 2008, 04:49   #51
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Why not keep the current turbocharger (rebuild it) and just make the compressor side bigger?

Would that work?
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Old November 10th, 2008, 05:07   #52
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Quote:
Originally Posted by pietch
Basically the max limit the ECU will allow for fueling is not as great as the digital tuning box can allow.
Are you stuped?
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Dyno'd area, Old VNT20 setup dyno'd 192whp
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Old November 10th, 2008, 05:33   #53
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Rub87:

"Basically the max limit the ECU will allow for fueling is not as great as the digital tuning box can allow."

This is what I have been told by a VW remapping specialist who only deal with chiptuning ECU's - why would they say this if a digital box (their competition effectively) could produce better results especially off-boost?

Are you trying to say the ECU has zero limitations?
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Old November 10th, 2008, 06:38   #54
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If you know how the ecu has no limitation, offcourse the PD nozzles are the lmitation, if you want to program 40 duration, no problem, but it's not so healthy for the egine etc
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Old November 10th, 2008, 06:40   #55
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So the ECU does have some limitations or can it be programmed to do anything?
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Old November 10th, 2008, 06:45   #56
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if you know how it can do anything.. and much better than a stuped tuningbox..
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Old November 10th, 2008, 06:53   #57
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If I could do just one mod (regardless of the 117bhp made by the remap) I would take the digital box 101bhp mod - the car feels much, much better with it in real world driving as it makes loads of torque where remaps could not
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Old November 10th, 2008, 08:21   #58
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Quote:
Originally Posted by pietch
If I could do just one mod (regardless of the 117bhp made by the remap) I would take the digital box 101bhp mod - the car feels much, much better with it in real world driving as it makes loads of torque where remaps could not
If you know how you can program as much fuel and boost in the ecu as you want.
Way way better to control than a box..

Bigger compressor on stock turbo will cost as much as VNT turbo and will make your turbo problebly spool even later..

Johan
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Old November 10th, 2008, 09:03   #59
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What would be the best modification to the STD turbo during a rebuild to help performance down low and keep top end?
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Old November 11th, 2008, 03:03   #60
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none, as it is now the turbine exducer is the limit, if you take bigger comprssor you have even more work for the turbine so even more backpressure and later spool due more inertia..

The good way of upgrading it would be bigger turbine AND compressor, but that's gonna cost you spool..
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Dyno'd area, Old VNT20 setup dyno'd 192whp
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