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ive been getting a mixed response, even from workshops....hence my confusion...

The reason why you have been getting mixed responses is because you haven’t fully thought through what it is exactly that you are trying to achieve. The fact is you have already “boosted” it, by removing the restrictions in the exhaust you have increased the airflow. The turbo is flowing more air, hence it is working harder and revving higher. So if you are intent on not “boosting” in an attempt to avoid turbo wear, you have already failed in that regard.

Secondly, in a turbo charged engine, the real advantage is you can easily, quickly and cheaply increase the power output by increasing the airflow though the engine. Reducing restrictions (as you have already done) is one of those items, increasing the boost to a “safe” level is another, the third is improving the tune for power productivity.

By increasing the airflow you have already put the standard ECU outside its operating parameters. It is currently running rather rich and somewhat retarded in its ignition timing. Any further mods will simply exacerbate that poor state of tune.

So, my best suggestion is to think carefully about what it is you want to achieve, set a power target and determine what uses you are going to put the car. If you enunciate those things then you will find that you get solid and consistent responses.

:P cheers :)

Edited by Sydneykid
Liz - what split pipe did you have?? what was wrong?

I had a 3inch split dump pipe from place in Sydney, the welding wasn't ground back causing more turbulance rather than less, and also the pipe wasn't a direct fit and exhaust hole was actually smaller than stock causing the wastegate to not open fully causing significant overboosting.

The exhaust was done by HiTech in Sydney, and have offered to replace the part free of charge with a correct part. I would recommend HiTech to anyone getting an exhaust, they know what they are doing and released the mistake straight away and fixed me up.

At least I know now to check the parts before they get put on!

i realise a turbo back exhaust has already 'boosted' the turbo because its less restrictive, but what i was trying to say is that i wouldnt go any further. i think i pretty much have said what i want to acheive, if your still confused, i dont know what else i could say.

Basically mechanics and other drivers with the afc and pfc have said in relation to my car, a pfc is over doing it, but they think i should get it INCASE i choose to futher modify the engine

i realise a turbo back exhaust has already 'boosted' the turbo because its less restrictive, but what i was trying to say is that i wouldnt go any further. i think i pretty much have said what i want to acheive, if your still confused, i dont know what else i could say.

Basically mechanics and other drivers with the afc and pfc have said in relation to my car, a pfc is over doing it, but they think i should get it INCASE i choose to futher modify the engine

sounds like youve awnered your question, your final conclusion is spot on! Its just up to you to make the desision cause unfortunatly we cant do that for you and would take away all the fun of customizing your car.

good luck!

i realise a turbo back exhaust has already 'boosted' the turbo because its less restrictive, but what i was trying to say is that i wouldnt go any further. i think i pretty much have said what i want to acheive, if your still confused, i dont know what else i could say.

Basically mechanics and other drivers with the afc and pfc have said in relation to my car, a pfc is over doing it, but they think i should get it INCASE i choose to futher modify the engine

Let’s talk specifics;

1. What is your power target?

2. What do you use the car for? Road, circuit, drag?

3. What other tings are important to you? Reliability, fuel economy, resale value, cost, response?

4. What is your budget?

:P cheers :)

1) Reasonbly happy with the power, just want to improve the other things i have mentioned

2) Everyday use.

3) All of the above, reliability and response & performance mainly though.

4) No expense spared really, i dont like taking shortcuts.

Is there any thing other than what i have mentioned in this thread i could do to improve perfrormance besides boosting?

Edited by PAV34
  • 1 year later...

hey all.. just bringing up a old subject instead of a new one..

im happy with around 200rwkw.. will a apexi neo afc be ok for me?. how much kw at the wheels will this allow until i need to upgrade to a ecu?.. also, will this allow me to get a different afm?, like a q45?. or will i need a ecu for this?. thanx..

Edited by seriesII

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