Golf 4 GTI engine change

[niijohnnie]

have recently changed engine from AUM to AUG on GTI mk4 2002. realised need some tuning for the ECU since performance is not satisfactory. I wonder if i exchanged AGU head with that of the original AUM will result in better performance with no need for a retuned ECU?

[cullygti]

from what i can make of it your going to be defeating the object of why it was done in the first place or am i missing summat

the tequila and stella is kicking in 

[dan2252]

the whole good point about the agu in my eyes is the fact there not as clever lol so they dont throw up lights when you get rid of the cat, also the heads got bigger ports. so why would you fit a agu bottom end to a aum head? that just sounds a bad idea..got any pics of the engine bay?

[Adz Gti]

if anyone don't mind me asking, what is better AUM or AGU ? Aren't they the same ?

[mar_k]

Different port sizes in the head
AUM has a fly-by-wire where as the AGU has a throttle cable

Think the AGU has stronger internals

AGU is fitted with a K03 turbo
AUM has a K03s


AGU has no VVT

And the AUM has more emissions control sh!te on it

so they are quite different

[Adz Gti]

so to sum it all up AGU would be a better choice ? Damn fcuk im stuck with an AUM lol

[Chris.]

AUM is perfectly fine for any stage 2 car.  Until you start yo go over 300bhp, i highly doubt the large port head is going to make a difference.

Its swings and roundabouts.  If I was to do it for stage 2 and had chance of both engines....id be putting AUM sensors onto the AGU engine bare block and the k03s turbo.

[dan2252]

wish they had less sensors... never known a engine so bad for lambdas and mafs!!! haha

[niijohnnie]

the whole good point about the agu in my eyes is the fact there not as clever lol so they dont throw up lights when you get rid of the cat, also the heads got bigger ports. so why would you fit a agu bottom end to a aum head? that just sounds a bad idea..got any pics of the engine bay?

bought the car just around when the engine was being changed by the owner, only to realised the differnces when i noticed the performance drop. will post the pics soon
 

[niijohnnie]

AUM is perfectly fine for any stage 2 car.  Until you start yo go over 300bhp, i highly doubt the large port head is going to make a difference.

Its swings and roundabouts.  If I was to do it for stage 2 and had chance of both engines....id be putting AUM sensors onto the AGU engine bare block and the k03s turbo.

yeah..how to do this? is it not similar to using an AUM or the original AWP head on the AGU block?  check engine light is for lamda and cam shaft postion sensors.