RS4 B7 - MRC Installs TTS supercharger

[R1RS4]

Hi all,

Thought I would just give an update on my latest change to my car

Following the Surrey Rolling road day back in December, I had joked about saying if my car did not make 400+ then I would have to seriously think about changing things like maybe a charger

So I spent about 3 months investigating/considering different options, APR, Whipple, TTS, JHM ?

I contacted various members, companies, manufactures, considered installing myself, timings, reliability, output and mainly cost to arrive at a MRC installed TTS

I was hoping to have it ready for the recent run what you brung day at Santa pod, but it wasn't to be, to get the kit installed and running right is never plain sailing as many will know,

On the way to MRC for the first time in 18 months the car suffered a hesitant power loss, as luck would have it (intermittent)

Starter motor failed whilst there, covered under warranty (lucky)

Asked MRC to fit my new JHM oil cooler pipes, pissed out from the adaptors supplied with the kit, removed from car inspected refitted pissed out again - changed for OEM

Kit comes with upgraded fuel pump kit, removal of old intake manifold (hooray) no more flaps

The car drives as per normal up to about 3500 rpm then off she goes (flies)

The engine oil temperature I have noticed already runs a lot cooler, before at about 20 deg ambient the car would run 104 to 108 depending on driving now 99 to 102

Early days; on the beans about 12 mpg, a run on Sunday I did a 35 mile trip with a couple of bursts and cruised at 70 - 80mph, got out the car and it was showing 22.5 ? What I have noticed is with the extra power when your doing 70 to 80 the revs are a lot lower and less effort ?

I was worried about the standard brake set up, but as I have not changed my driving style just because of the SC, and still use engine braking where possible alls well for now

The down side I have since found out, that having my revolution intake air system removed (gone back to OEM with performance filter) I do miss that roar, but the off set is cooler air through the engine, and the roars back when the SC's full on

I have had only two goes at the 3k - 8k test

1st run; 6.3 sec

2nd run; 5.6 sec

Both with sport button off

1/2 tank Momentum 99 RON

130 Mtrs ASL

Ambient. 16.5 deg C

[E14STO]

Nice work...
Was the car carbon cleaned or wasnt it needed?
I don't think mines had a carbon clean since charger was installed but it's still pulling 5.9-6.1

That makes me think I'll hang on a bit!

I've never driven a standard one but they go like stink through the gears and fantastic.
Enjoy.

Santa pod for me this year i think.
Never done it and I think this is prob my quickest car to date so seems rude not to!

[R1RS4]

Nice work...
Was the car carbon cleaned or wasnt it needed?
I don't think mines had a carbon clean since charger was installed but it's still pulling 5.9-6.1

That makes me think I'll hang on a bit!

I've never driven a standard one but they go like stink through the gears and fantastic.
Enjoy.

Santa pod for me this year i think.
Never done it and I think this is prob my quickest car to date so seems rude not to!

Yes had the full carbon clean, although it had been done by previous owner about 5k miles ago, so wasn't that bad

How many miles have you clocked up on the TTS?

What's your oil temp like?

Have you run full throttle with ESP totally off is position 3?

Or Launched with ESP off?

Santa pod, still a must do for me, that would be a good one for the video x2 TTS

[marc1]

Good read R1RS4. It sounds awesome. I want one!!

[Ellis]

Goodness me. Here was me thinking a 7.9 sec 3k-8k pull was awfully quick as well. This is in a completely different league.

Jealous much. Keen to see videos from Santa Pod eventually.

[R1RS4]

Good read R1RS4. It sounds awesome. I want one!!

Wherever there's a will there's a way - that's what they say

[E14STO]

I think it was installed at around 39k
I had the car at 57k and I've done 10k in it.
It had a slight rattle earlier in the year. One of the pulley bearings had worn.
About 100 quid from tts. Was out of warranty.

I think highest I saw last summer was 103/104.

What is position 3?
I always have esp flickering as the torque limiter is still on my car although it had a MRC tweak last year.
It's v annoying...

Don't really launch it, well I've never just dumped the clutch.
It's got a loba 800 clutch in it which can take it but it's fairly aggressive

[R1RS4]

I think it was installed at around 39k
I had the car at 57k and I've done 10k in it.
It had a slight rattle earlier in the year. One of the pulley bearings had worn.
About 100 quid from tts. Was out of warranty.

I think highest I saw last summer was 103/104.

What is position 3?
I always have esp flickering as the torque limiter is still on my car although it had a MRC tweak last year.
It's v annoying...

Don't really launch it, well I've never just dumped the clutch.
It's got a loba 800 clutch in it which can take it but it's fairly aggressive

Well position 3 turns off ESP, but does not totally disengage it, i.e. if you were to lose the car it kicks back in for safety reasons

The reason your light flickers on and off and this will be the case on standard non SC car is the ESP system incorporates ADL and ESL I won't go into the finite details (read on wiki) but as the ESP system sees wheel spin, loss of traction, wrong steering angle etc it applies the brakes to that wheel, correcting the car but "momentary" slowing the car...... Wait for replies..... and this I believe happens more so with the extra horses

So if you do your 3k to 8k, with the ESP off ( position 3) I think you will have a faster time

Position 1, light out - normal settings

Press once position 2, light flickering - ADL & ESL off

Press and hold for more than 10 seconds light lit permantly -,ESP off

As soon as the car is switched off and restarted it defaults to normal

Anyone has further knowledge of this system, would be glad to here about what they have found out, I am trying to teach myself via VCD's how to check all the components operate correctly

[E14STO]

Understood. Solid light to me is position 2... Hence why I thought I was missing something else!
That's fine then. I have it flashing which stops the torque limiter kicking in and any traction control.

If I forget and have cause to give it some welly, it's severe.
Tbh is like it mapped out and believe the torque control thing should be. Which confuses me.
Maybe MRC will do it for free if it's part of the standard map!

[Loko]

Early days; on the beans about 12 mpg, a run on Sunday I did a 35 mile trip with a couple of bursts and cruised at 70 - 80mph, got out the car and it was showing 22.5 ? What I have noticed is with the extra power when your doing 70 to 80 the revs are a lot lower and less effort ?

Nope. If the gearbox and diffs are the same, for any given road speed in a gear, your engine speed will be the same. Less effort yes, less revs nope.

[R1RS4]

Early days; on the beans about 12 mpg, a run on Sunday I did a 35 mile trip with a couple of bursts and cruised at 70 - 80mph, got out the car and it was showing 22.5 ? What I have noticed is with the extra power when your doing 70 to 80 the revs are a lot lower and less effort ?

Nope. If the gearbox and diffs are the same, for any given road speed in a gear, your engine speed will be the same. Less effort yes, less revs nope.

So less effort = less fuel required?

[E14STO]

Heard slightly better on fuel with a SC.
Marginal though...

[R1RS4]

Understood. Solid light to me is position 2... Hence why I thought I was missing something else!
That's fine then. I have it flashing which stops the torque limiter kicking in and any traction control.

If I forget and have cause to give it some welly, it's severe.
Tbh is like it mapped out and believe the torque control thing should be. Which confuses me.
Maybe MRC will do it for free if it's part of the standard map!

Not totally sure on what's happening with the extra power that's why I am trying to understand it better, have got into the Abs set up on VCD's (Bosch but you have to request a code from Ross tech and explain why you need it to gain access

Be worth while asking them and see what they think?

I will report back

[Loko]

Early days; on the beans about 12 mpg, a run on Sunday I did a 35 mile trip with a couple of bursts and cruised at 70 - 80mph, got out the car and it was showing 22.5 ? What I have noticed is with the extra power when your doing 70 to 80 the revs are a lot lower and less effort ?

Nope. If the gearbox and diffs are the same, for any given road speed in a gear, your engine speed will be the same. Less effort yes, less revs nope.

So less effort = less fuel required?

What I meant by less effort is that the engine load will be somewhat lower. The main effect of course is that the delta between max engine power (which is now higher of course) and power required to achieve any given speed (which won't have changed regardless of mods, ignore pumping losses from the blower etc. to keep it simple) is bigger. Hence that 'excess power/torque' means more acceleration. It also means more top end if the RS4 is limited in 6th and can't get to the limiter at 8250rpm. If it can (don't imagine so) then no max speed increase because again, it's gearing limited. The latter is pointless in the real world since we don't hoon around at 180mph but just for completeness.

The fuel required aspect is a different story. This depends on many more issues that I'm not privy too for the supercharger set-up. The blower will change the basic fish hook curves of the engine so is it different? Yes of course. When you're on it, volumetric efficieny is significantly higher with the blower and since you're ECU will be looking for (simplistically) stoichiometric burn or 14.7 parts air to 1 part fuel, then more air means more fuel. Ultimately your power comes from this.

When you're not on it, it's more complicated and it depends on what the map is laid out like. As mentioned your basic lambda fish hook is different with the blower and you can tinker tuning here. At part throtle it is always more economical to run an engine with a weak mixture as opposed to a slightly more closed throttle with a richer mixture. With a blower though you have to consider detonation, especially in an RS4 with high compression ratio, so the tuner may choose to pump a little extra fuel into the cylinder to keep the mixture cooler and help with this.

[Cuppa]

I noticed similar when I had my TTS charger fitted. When I'm tootling around with my tunes up high and taking it steady then my MPG is better than previous.

But of course when you pull the trigger the MPG goes out the window and the grin appears