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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 13th, 2019, 09:37   #1
shone190
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Question Audi AAT 2.5 TDI power increase / limits

Hi guys, I have Audi AAT 2.5 TDI 115HP engine and thinking about power increase.

I know that this engine has cast pistons (AEL 140HP has forged) and want to know what is the HP/Torque limit for AAT pistons?

I would like to make about 250HP/500Nm, but to be on the safe side with the engine.

So is it safe to go with AAT engine or still with AEL?

Thanks a lot in advance.
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Old November 13th, 2019, 15:05   #2
dillenger1
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im gonna need pictures
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Old November 13th, 2019, 15:06   #3
shone190
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Pictures of what?
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Old November 13th, 2019, 15:59   #4
jhax
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The car, the motor. I am certainly intrigued
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Old November 13th, 2019, 18:58   #5
dillenger1
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yes I want it all!!
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Old November 13th, 2019, 22:52   #6
adamss24
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Quote:
Originally Posted by shone190 View Post
Hi guys, I have Audi AAT 2.5 TDI 115HP engine and thinking about power increase.
I know that this engine has cast pistons (AEL 140HP has forged) and want to know what is the HP/Torque limit for AAT pistons?
I would like to make about 250HP/500Nm, but to be on the safe side with the engine.
So is it safe to go with AAT engine or still with AEL?
Thanks a lot in advance.
For what they cost nowadays go for the AEL swap, its cheaper in the long run...
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Old November 13th, 2019, 23:15   #7
shone190
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Why is the car and the motor pictures important for the question about pistons limit?!?!
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Old November 15th, 2019, 04:59   #8
shone190
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Anyone??
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Old November 15th, 2019, 06:05   #9
Markus L
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Why do you think AEL has forged pistons? Cast pistons can be made to bear 200 bar peak cylinder pressure.
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Old November 15th, 2019, 06:13   #10
shone190
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Because I know that Ael has forged pistons.
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Old November 15th, 2019, 09:03   #11
Markus L
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Then it must also have piston replacement scheduled with every oil change due to lack of steel reinforcement for top ring groove.
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Old November 15th, 2019, 09:08   #12
shone190
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So what is the connection between that fact and question about HP/Nm limits of AAT engine?
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Old November 15th, 2019, 17:57   #13
Yourbuddysatin
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What is going on here?!?!
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Old November 18th, 2019, 17:46   #14
dillenger1
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we don't see many 2.5 in the states.love them and I wanna see pictures.didnt mean to offend you.
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Old November 18th, 2019, 22:36   #15
adamss24
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Most c4 audis in europe are pieces o s*it as they old and rotten however you get the odd one thats been loved and cared for but its rare ! I had a c4 a6 and it was a really well put together car, mine was auto and gave me some trouble... The 6 speed gearbox and the 140 Bhp engine really does go well together ! I would keep modding minimal as the 5 speed box in the AAT is kinda weak and clutch will slip with minimal modds...Also the archaic ECU is hard to work with, i know of a few that had later EDC15 ECU from 2000-on transporter 2.5 tdi as the wastegated k14 is difficult to mod due to old tech. However using the wiring harness from t4 150 Bhp opens a whole load of posibilities to tune the old inline5 lump !
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