ECU flash

[HugoPan123]

Hey guys
I have a mk6 gti. And it has been remapped by HPF (custom dyno tune). Now I have upgraded the intake and downpipe for my car. I feel slower than before.
I'm wondering if I can get APR stage 2 ecu tune straight away or do I need to go for apr stage 1 first?
Cheers


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[HugoPan123]

Can anyone help me please?


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[AdamD]

You can get an APR stage 2 tune straight away (it's simply a different file to the stage 1), but their stage 2 is an off-the-shelf tune designed for their downpipe and other mods (intake, optional HPFP, upgraded intercooler etc etc). Depending on your intake and downpipe it may not play 100% well - you'd need to speak to your local APR dealer to check what they'd recommend.

Failing that, take your car back to the original supplier of your tune for a remap now that you've had new hardware fitted.

[HugoPan123]

You can get an APR stage 2 tune straight away (it's simply a different file to the stage 1), but their stage 2 is an off-the-shelf tune designed for their downpipe and other mods (intake, optional HPFP, upgraded intercooler etc etc). Depending on your intake and downpipe it may not play 100% well - you'd need to speak to your local APR dealer to check what they'd recommend.

Failing that, take your car back to the original supplier of your tune for a remap now that you've had new hardware fitted.

Thank you very much.
I have apr intake and an aftermarket downpipe. So I'm planing to get a better downpipe.


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[Lucas_R]

Downpipe wont make a difference. As long as its around 3" diameter with a hi flow cat then one brand is no different to another - dont waste your money changing it.

[HugoPan123]

Downpipe wont make a difference. As long as its around 3" diameter with a hi flow cat then one brand is no different to another - dont waste your money changing it.

Okay. I did heard ppl say that downpipe gains the same power. Does it worth to go to stage 2?


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[sillyboy]

Okay. I did heard ppl say that downpipe gains the same power. Does it worth to go to stage 2?


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My understanding is that you have a after market downpipe installed already, therefore you should get suitable tune for it, not only to get the extra benefit of the new hardwares, also to make sure your car runs correctly.

[h100vw]

Failing that, take your car back to the original supplier of your tune for a remap now that you've had new hardware fitted.

This should be option one. Did you not consider the need for a re-tune after the downpipe was fitted?

Also, how much better do you expect the replacement downpipe to be. I predict that there will be no measurable improvement for the money you spend on it.

Gavin

[Guy_H]

As long as your downpipe is 3" (and runs a minimum of 200 cell catalyst for legal reasons) the APR stage 2 will run fine off the shelf!

[HugoPan123]

Thanks for your replies.
I'm considering to go APR stage 2 or just go to my original tuner for software update. for update software will only cost me $400-500.


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[HugoPan123]

Anyone can give me ideas? Thank you


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[Lucas_R]

Okay. I did heard ppl say that downpipe gains the same power. Does it worth to go to stage 2?

I don't understand what you are trying to say???

Any aftermarket downpipe of 3" diameter for the Mk6 GTI will be very similar in terms of performance - any differences would be so small you would not even know about it. Certainly not worth the money to swap down pipes simply to try and make 5kw.

I run a Eurojet downpipe on my MK6 GTI with 200 cel cat, and i certainly wouldn't be swapping it with anything else unless it got damaged.

You will need to have your tune updated to suit the new intake and down pipe.

[dArK5HaD0w]

there is not much power increase from stg 1 to a stg 2, compared to going from stock to stg 1.

the apr downpipe requires an ecu remap, hence u get a stg 2 map with the purchase of the downpipe.

[HugoPan123]

Hey guys
So I just did dyno runs.
And the figure shows that it makes the same power as stage 1 tuned. ( I changed to APR intake and a 3" downpipe). I'm wondering why it makes no gain. Anyone could help?
Cheers
Hugo


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[Lucas_R]

As mentioned by about 5 people in this thread - you will need to have the car retuned to suit the intake and downpipe. The tuner will adjust timing, increase turbo boost etc etc to suit the mods.