Drifter
Honorary Master
Bottom line with modding, dont cut corners. Get the best your money can buy or save up until you can. It doesnt have to happen in one go.
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Does re-mapping/software/"chipping" etc. improve both performance and economy?
- Thread starter unknown123
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- fuel efficiency
You just said you have to change the exhaust system first. Probably for one that can flow more air with less restriction. Hence the motor will be able to hold peak boost pressure slightly higher up the rev range which means more kw for the same peak boost pressure. Although boost pressure is not increased, the volume of air passing through the turbo is increased as it holds the original pressure with a higher flow rate. So your turbo is able to work harder and hold boost pressure a little longer as there is a lower pressure behind it.
Peak and average torque gains would be insignificant but the torque would hold a little higher up the rev range.
That's the G6 GTI engine... go to Revo Technik. They will get some decent figures out of that engine.
Edit: just realised you said 1.8t and not 2.0t. Its not the GTi engine...
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Adenoid Hynkel
Executive Member
What Audi 1.8T pushes 155kw stock?
silver6933
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Rather than argue with words.
Read this link.
Prodrive dyno day and results from a stage 2
(IT clearly states 'did not just wind up the boost') (technically a less than 1% increase in boost)
37% increase in usable horsepower.
http://webcache.googleusercontent.c...ubaru-WRX-PPP-Stage-2.pdf+&cd=8&hl=en&ct=clnk
Prodrive was the UK equivalent of Subaru in house tuning. The built the legendary P1 and also ran Ferrari teams. PP kits were available in SA under warranty.
My car has the equivalent of a PP stage 4. To say it was very done, is an understatement.
PS read page 15. It specifically discusses why a car will make less power with the same engine. OEM designed.
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Stage 2 isn't exactly stock from what I read. Decat, changed exhaust, changed intercooler piping and software.
Very nice increases without increasing boost pressure.
I understand Prodrive is a Professional Engineering firm that specialises in motor racing; F1, le Mans, WRC, etc. Not exactly minor leagues, or comparible with the monkeys at revo, sto, sac, etc whom I would expect, up the boost.
The document you linked to is more of a marketing document and doesn't offer much information. They don't mention changing timing or A/F and they stay clear of any torque values or curves.
My opinion is that the mods reduce the exhaust restrictions after the turbo and allow a larger maximum volume of charged air to the engine. Both these changes amplify each other, allowing more air to flow at the same manifold pressure and for the turbo to hold the pressure higher up the rpm range Hence improvemnts in power from 4000 to 6000rpm as stated in the document and no changes below 3000rpm.
The lower pressure behind the turbine wheel due to the Decat and exhaust changes allow the turbo to spin faster and keep its same boost pressure higher up the rpm range. The higher capacity intercooler piping allows for the higher flow of air into the intake manifold.
So no, this is not only software timing and A/F adjustments. But rather mods to optimise the turbo's operating conditions. It extends the torque band higher up the rpm range without loosing any torque lower down. Power is a function of RPM and torque so holding onto the torque a little higher up the RPM range has a drastic effect on marketable power figures.
Very nice increases without increasing boost pressure.
I understand Prodrive is a Professional Engineering firm that specialises in motor racing; F1, le Mans, WRC, etc. Not exactly minor leagues, or comparible with the monkeys at revo, sto, sac, etc whom I would expect, up the boost.
The document you linked to is more of a marketing document and doesn't offer much information. They don't mention changing timing or A/F and they stay clear of any torque values or curves.
My opinion is that the mods reduce the exhaust restrictions after the turbo and allow a larger maximum volume of charged air to the engine. Both these changes amplify each other, allowing more air to flow at the same manifold pressure and for the turbo to hold the pressure higher up the rpm range Hence improvemnts in power from 4000 to 6000rpm as stated in the document and no changes below 3000rpm.
The lower pressure behind the turbine wheel due to the Decat and exhaust changes allow the turbo to spin faster and keep its same boost pressure higher up the rpm range. The higher capacity intercooler piping allows for the higher flow of air into the intake manifold.
So no, this is not only software timing and A/F adjustments. But rather mods to optimise the turbo's operating conditions. It extends the torque band higher up the rpm range without loosing any torque lower down. Power is a function of RPM and torque so holding onto the torque a little higher up the RPM range has a drastic effect on marketable power figures.
Drifter
Honorary Master
What he said ^^^^.