REVO Airflow on AGU Audi A3 1.8T

[Tallpaul]

Sorry this isn't a SEAT question but the Audi forums are uselss!

I have a 1998 Audi A3 1.8T Sport (AGU, non-dbw, 2wd, 150bhp).

When i bought it i checked the fault codes and logged airflow. It had an occasionally eratic idle and threw a 'Throttle Position Actuator' fault code on VAG-COM. I stripped the throttle body off, cleaned it up and cleared the code and all seemed well.

Prior to getting REVO installed i logged airflow at a consistent 124g/s.

Having had REVO installed the idleing problem returned but without the fault code. Also i'm 'only' getting 140g/s airflow.

Now i was kinda expecting to hit about 150g/s, maybe that was too optimistic?

I have a Forge DV, Green Panel Filter and 80mm cold air feed to OE Airbox. I don't have any 'obvious' leaks or faults (not to say that none are present as the majority of hoses are 8 years old!).

A few things then:

Could my MAF be faulty?

How much can inlet air temp affect the g/s value?

I'm currently using 95ron BP fuel, how would 98ron fuel and it's subsequent effect on timing affect the g/s value?

Can timing pull and boost requested vs actual be measured with full VAG-COM on non-dbw ECU's?

Is 150g/s a realistic target with a fully working MAF, sensible inlet temps and 98ron fuel?

Cheers for any help!

 

[Saul]

sounds like a buggered maf to me

 

[claudefrog]

id be changing the MAF.. seems very low airflow readings, id say you may se closer to 160 with a good maf

 

[Tallpaul]

is 160 g/s typical for remapped K03 Ibiza Cupra's?

On a search, i saw people with 147 g/s that were happy with their remap???

 

[ibizacupra]

agu's dont usually read quite as high for some reason.

 

[Tallpaul]

agu's dont usually read quite as high for some reason.

so would you consider 140g/s in 28deg ambient temps on 95ron fuel an acceptable flow rate?

I was hoping for a bit more, would it be as 'simple' as lowering inlet temps and using Optimax or is that about the best i can expect without changing the turbo?

What are the AGU maping options if i changed to a K03s?

Seems that there is very little mapping on offer for non-dbw.

 

[ibizacupra]

ko3s or some other bigger jobbie and mapping to suit yes..
I vaguely recall having done a remap on an agu and the figures were around the same level as yours, which was lower than dbw cars, but that assumes the maf scaling is the same between models, which it is'nt.

You might get some other agu motor'd people on ukmkivs forum

 

[Simon L]

I always made around 150g/s and on 3 different RR's made around 195-200bhp.

(Thats a K03 with Star Remap.)

So 140g/s, doesnt sound too low.

 

[Tallpaul]

I always made around 150g/s and on 3 different RR's made around 195-200bhp.

(Thats a K03 with Star Remap.)

So 140g/s, doesnt sound too low.

On an AGU A3 1.8T?

I've logged it again today and made 144g/s. I think the lumpy idol was due to my coolant temp sensor so i reckon the MAF is probably ok.

I wasn't worried that my car was down on power, it absolutely flies at the moment. Just wish i could afford a FMIC as my inlet temps are about 60°C on full load!

Was just 'expecting' 150g/s+ and thought that 140g/s and a lumpy idle might have meant a MAF problem.

Cheers for your replies.

 

[Simon L]

No sorry, on a AYP Cupra.