MRC stage 2 advice

4.2 V8 32v Naturally Aspirated - 414 bhp
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otb123
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MRC stage 2 advice

Post by otb123 » Tue Sep 14, 2021 11:39 pm

Hopefully booking in for a stage 2 MRC soon, as I’ve had a deflap and decoke.

Is it wise to get some exhaust work done before to take full advantage? Hear people gutting the precats and adding a Milltek etc.

What are peoples opinions/experiences? Or just to go for it and leave the exhaust stock.
Cheers.

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12th
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Re: MRC stage 2 advice

Post by 12th » Wed Sep 15, 2021 7:42 am

I had stage 2 and nothing else, and have been very pleased. The greater power at the top end is not the main gain. The increased torque (which is a bigger percentage gain than the increased power) is more useful, and the full throttle in all gears makes the biggest difference in day-to-day driving. I am now thinking about the pre-cats and exhaust, but it's taken a few years to get to this stage. Not sure that this helps, other than to say that you definitely won't regret going to MRC.
Sprint Blue B7 RS4 Saloon with MRC tweakery.

otb123
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Re: MRC stage 2 advice

Post by otb123 » Wed Sep 15, 2021 11:08 am

Cheers for that, sounds a good option and benefits from it and definitely need it done to map in the deflap. I think I might just go for it now and do the exhaust later on - don’t think the precats or exhaust need to be mapped in do they?

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12th
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Re: MRC stage 2 advice

Post by 12th » Wed Sep 15, 2021 4:33 pm

Looking at the website, it seems that the pre-cat might need mapping, in which case it might also need the rolling road doing again. If so, get them done together.

This is what the website says:

Removal, or gutting, of precats from your standard downpipes. The 400 cell precats are removed leaving your 200 cell main cats giving you a lot less restrictive pair of downpipes. Lambda sensors are left in original positions.

*Requires a Stage 2 remap, as the rear lambdas are used to test for precat efficiency and this will fail the test if not coded.

Check out the exhaust options tab here:

http://www.mrctuning.com/index.php/audi ... /rs4-b7-2/
Sprint Blue B7 RS4 Saloon with MRC tweakery.

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12th
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Re: MRC stage 2 advice

Post by 12th » Thu Sep 16, 2021 9:00 am

Oh, there is one drawback - the non-sport mode is sluggardly. It will pick up its skirts, but the throttle response is dulled and feels like it wants to resist you. I don't use non-sport mode. Ever.
Sprint Blue B7 RS4 Saloon with MRC tweakery.

maars
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Re: MRC stage 2 advice

Post by maars » Mon Sep 20, 2021 12:23 am

12th wrote:
Thu Sep 16, 2021 9:00 am
Oh, there is one drawback - the non-sport mode is sluggardly. It will pick up its skirts, but the throttle response is dulled and feels like it wants to resist you. I don't use non-sport mode. Ever.
Seems a shame to leave it lacking in non Sports mode ...
Daytona RS4 Avant - black optics/decat downpipes/H-pipe/KW springs - featured on the 2012 Audi stand at the Goodwood FoS

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12th
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Re: MRC stage 2 advice

Post by 12th » Mon Sep 20, 2021 7:50 am

If non-sport just kept the exhaust flaps closed, that would be perfect.
Sprint Blue B7 RS4 Saloon with MRC tweakery.

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