REVO downpipe with high flow cat

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Mr Gav

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Hi All

I have the tuning bug and I am wondering if anyone knows how much louder a REVO downpipe with a high flow cat connected to the standard exhaust system is? I all ready have the VWR intake system and uprated hose and elbow to the turbo so it makes sense to do the exhaust downpipe too.

My lady also drives it and I know she won't be impressed if it is popping and banging like a boy racer.
 
it won't pop and bang unless you tune it to over fuel....it will be louder though with a downpipe, but as the catback has valves this won't be so loud until you floor it
 
Pay attention because without remap the engine warning light will appear.
 
SeoTFSI said:
Pay attention because without remap the engine warning light will appear.
Click to expand...

With a high flow cat? I wouldn't have thought so.

A decat, maybe. I'm just waiting on my decat to arrive.
 
RO65ERS said:
With a high flow cat? I wouldn't have thought so.

A decat, maybe. I'm just waiting on my decat to arrive.
Click to expand...

Majority of the high flow cat WILL throw CEL, only way to be sure is to get an Euro 6 cat, that's why I went with HJS Euro 6... Or be ready to get remap or spacer...
 
larbel said:
Majority of the high flow cat WILL throw CEL, only way to be sure is to get an Euro 6 cat, that's why I went with HJS Euro 6... Or be ready to get remap or spacer...
Click to expand...

For 3 quid, a spacer is the easiest and most effective way.

It's my chosen route.
 
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RO65ERS said:
For 3 quid, a spacer is the easiest and most effective way.

It's my chosen route.
Click to expand...

Actually, it's not... Spacer requires adjustment and there's no guarantee that it could eliminate CEL or not at all... Besides, there's always risk of overboost for downpipe without tune...
 
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It doesn’t matter. Maybe you’re light will be ok for some hundreds km but sooner or later it will appear. I asked to a lot of tuners and the answer has been always the same: no remap-> warning light on.

Or you can put a spacer..
 
Thanks for the advise but I'm going go for a REVO Stage 2 remap at same time but seems I also need a bigger turbo intercooler to do this. I have seen people using the Forge ones, are these the best?
 
With stage 2 no problem. I think that various FMIC are more or less the same. Here in italy lot of people go for Wagner.
 
Mr Gav said:
Hi All

I have the tuning bug and I am wondering if anyone knows how much louder a REVO downpipe with a high flow cat connected to the standard exhaust system is? I all ready have the VWR intake system and uprated hose and elbow to the turbo so it makes sense to do the exhaust downpipe too.

My lady also drives it and I know she won't be impressed if it is popping and banging like a boy racer.
Click to expand...
I have this exact setup (with MTM Cantronic) but using Milltek sportcat and DP. It’s no more intrusive but does give a lovely bark under acceleration and the upshift farts (DSG) are much louder. Do it!
 
audi upgrades
batch said:
I have this exact setup (with MTM Cantronic) but using Milltek sportcat and DP. It’s no more intrusive but does give a lovely bark under acceleration and the upshift farts (DSG) are much louder. Do it!
Click to expand...
I take it you used a spacer on the lambda?
I'm contemplating fitting a milltek sport cat but keeping the MTM for a while before going Revo stage 2.
I know the MTM won't allow for the increased flow but could you feel any benifit?
 
-Ju- said:
I take it you used a spacer on the lambda?
I'm contemplating fitting a milltek sport cat but keeping the MTM for a while before going Revo stage 2.
I know the MTM won't allow for the increased flow but could you feel any benifit?
Click to expand...
Definitely Ju, the MTM has a degree of adaptation in it - it’s a very complex piece of kit.
I used a spacer, no fault codes and sounds great/better response/definitely more torque.
 
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That sounds great.
The milltek should be with me sometime next week so might just say sod it and pop it on!
Any experience in fitting it or is it best left to a specialist?
 
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-Ju- said:
That sounds great.
The milltek should be with me sometime next week so might just say sod it and pop it on!
Any experience in fitting it or is it best left to a specialist?
Click to expand...
I paid to get mine done!
 
Revo and others will warn of overboost when running a sport car D/P with a tuning box although exactly what that is and if it brings any long term issues I do not know.


Sent from my iPhone using Tapatalk Pro
 
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larbel said:
Majority of the high flow cat WILL throw CEL, only way to be sure is to get an Euro 6 cat, that's why I went with HJS Euro 6... Or be ready to get remap or spacer...
Click to expand...

Where did you buy a DP with HJS Euro 6?
I guess your S3 is a restyling, right?!
 
Rob2k68 said:
Revo and others will warn of overboost when running a sport car D/P with a tuning box although exactly what that is and if it brings any long term issues I do not know.


Sent from my iPhone using Tapatalk Pro
Click to expand...

Doing some digging through Golf 7R owners’ posts elsewhere, it seems our turbos aren’t prone to it, something to do with the wastegates on these being comfortably oversized. So we should be ok.
 
batch said:
Doing some digging through Golf 7R owners’ posts elsewhere, it seems our turbos aren’t prone to it, something to do with the wastegates on these being comfortably oversized. So we should be ok.
Click to expand...

I'm ok so far with HJS high flow downpipe and JB4, but a friend has a Milltek DP throwing overboost code after returning from Uni to factory map...
 
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I'm Revo stage 2 and using Wagner intercooler and scorpion de-cat also with other various mods.
 
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MikeParkin said:
I'm Revo stage 2 and using Wagner intercooler and scorpion de-cat also with other various mods.
Click to expand...
Mike what’s yours like at that tune? I think that’s what I’m going for if we decide to keep this one - of course you and I are on similar hardware except the cooler, I’m thinking Airtec to save a few pennies...
 
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batch said:
Doing some digging through Golf 7R owners’ posts elsewhere, it seems our turbos aren’t prone to it, something to do with the wastegates on these being comfortably oversized. So we should be ok.
Click to expand...

Interesting; but, if I change a DP with 200cpsi sport cat, I've not clear what kind of issues could there be (with OEM map)?
 
Last edited:
batch said:
Mike what’s yours like at that tune? I think that’s what I’m going for if we decide to keep this one - of course you and I are on similar hardware except the cooler, I’m thinking Airtec to save a few pennies...
Click to expand...

It's fine mate I love it, I just wanted the better parts so I can't change my mind really.
 
MikeParkin said:
I'm Revo stage 2 and using Wagner intercooler and scorpion de-cat also with other various mods.
Click to expand...
I'm going for a stage 2 but I've been told that I don't need to do the intercooler and I don't need to do the fuel pump as its a TSI engine even though it says TFSI under the bonnet. I have a 2015 Audi S3 so I am now very confused.
 
Intercooler would be beneficial and no need for fuel pump upgrade at stage 2 but possibly Stage 3.

Who's told you an intercooler isn't needed ?
 
Someone at the Revo tuning place. Don't think they do a Revo one so got nothing to offer possibly?
Perhaps I need to take them one myself, was thinking a Wagner one but seems you got to alter the fixings in some way.
 
Mr Gav said:
Someone at the Revo tuning place. Don't think they do a Revo one so got nothing to offer possibly?
Perhaps I need to take them one myself, was thinking a Wagner one but seems you got to alter the fixings in some way.
Click to expand...
Wagner is the best intercooler going, it's been proven time and time with stage 3 boys.

Revo do offer an intercooler. They also claim it's OK on their 500hp stage 3 set up.

I'm saving for the wagner as I plan to go stage 3 eventually.
But I've seen good figures from the revo and even the forge intercooler
 
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Pretty sure Revo would highly recommend an FMIC upgrade for stage 2.

Been running a Revo intercooler for the best part of a year now with stage 2 no issues but with constantly low intake temps and no throttling back due to heat soak.

I don’t think it’s been officially released still as they can’t make enough stock as every one they make is sold.

Agree Wagner is the ultimate but comes at a cost premium and requires some dremelling to fit.
 
Rob2k68 said:
Pretty sure Revo would highly recommend an FMIC upgrade for stage 2.

Been running a Revo intercooler for the best part of a year now with stage 2 no issues but with constantly low intake temps and no throttling back due to heat soak.

I don’t think it’s been officially released still as they can’t make enough stock as every one they make is sold.

Agree Wagner is the ultimate but comes at a cost premium and requires some dremelling to fit.
Click to expand...

I picked up a Wagner when I was in US earlier this month and will be installing it next week. AFAIK, Wagner and AMS are the only ones that's tube & fins like OEM and everyone else are bar & plate, and they're the only ones that weights sub-10 kgs (compares to 3.x kgs OEM), and in a long run, tube & fins is better design for prolong operation? Bar & plate tends to dispense less heat after a short while and the only good thing about it is costs less to produce?
 
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It's just trial and error with the dremel on fitment but take you time and it will be fine.
 
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Mr Gav said:
I'm going for a stage 2 but I've been told that I don't need to do the intercooler and I don't need to do the fuel pump as its a TSI engine even though it says TFSI under the bonnet. I have a 2015 Audi S3 so I am now very confused.
Click to expand...

I'm Revo stage 2 and running a Revo FMIC with Revo Carbon Intake and Revo/Scopion Donwpipe. Revo definitely recommended an IC when I upgraded from Stage 1 to Stage 2 a few months ago.

An IC may not be 100% essential but it is all about keeping temps low and reducing the chance of power pull-back and heatsoak. I think you can run Stage 2 without but you may lose out on some power and even-more-so after repeated runs.

I was saving up for Wagner but heard it's more difficult to fit whereas Revo was a straight swap. I also compared the size of cores and technology from Forge, APR, Revo, Wagner. Wagner is the biggest and best but I found the Revo IC a good compromise.
 
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Forbzeeee said:
I'm Revo stage 2 and running a Revo FMIC with Revo Carbon Intake and Revo/Scopion Donwpipe. Revo definitely recommended an IC when I upgraded from Stage 1 to Stage 2 a few months ago.

An IC may not be 100% essential but it is all about keeping temps low and reducing the chance of power pull-back and heatsoak. I think you can run Stage 2 without but you may lose out on some power and even-more-so after repeated runs.

I was saving up for Wagner but heard it's more difficult to fit whereas Revo was a straight swap. I also compared the size of cores and technology from Forge, APR, Revo, Wagner. Wagner is the biggest and best but I found the Revo IC a good compromise.
Click to expand...

Is Revo a direct swap?? I thought all FMIC requires some trimming for S3?? At least both AMS and Wagner is the case...
 
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larbel said:
Is Revo a direct swap?? I thought all FMIC requires some trimming for S3?? At least both AMS and Wagner is the case...
Click to expand...


Sorry to jump in.

Yes it is a direct swap no fettling required.


Sent from my iPhone using Tapatalk Pro
 
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Rob2k68 said:
Sorry to jump in.

Yes it is a direct swap no fettling required.


Sent from my iPhone using Tapatalk Pro
Click to expand...

this makes it slightly more tempted!

but how well will it cope with a TTE525 and that kind of power, where as Wagner once again has been proven.
 
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