500 bhp?

[Bladerider]

If you go the next tyre width up ie 255 to 265 but keep the same profile you will actually be getting the same amount of rubber and ride quality. Speedo error will be minimal. I have 265/30/20 instead of 255/30/20 so same height of rubber as 255/35/19 which means the same ride quality with my 20s as OEM 19s.

I must need a new calculator !!!!

Cos mine says;

255/35 gives a sidewall height of 89.25mm
265/30 gives a sidewall height of 79.50mm

which is more than 10% reduction in an already harsh tyre, so not sure I would agree. Only 1% speedo under-read which is good though.

J.

[MikeFish]

Ok maybe I got the actual height bit wrong but the principles the same; go for a wider tyre to lessen the impact. 275/30 will be even less difference and still only a 1.8% change overall.
However, if you think the tyre was harsh to start with then 20s might not be for you. I didn't think the ride on the OEM 19s was harsh at all and it feels no harsher now with 20s (albeit with a higher profile that I'd have if I went for an exact rolling radius match).

[Bladerider]

I suspect we drive differently lol

[TechNick]

Nick has 20s on his widebody S4 doesn't he? Speak to him if you're worried about ride quality. I'd defo be looking at 20s if it was me.

No, not actually fitted yet Mike. Some cosmetics and spacing R&D to carry out before I really get to test the ride quality.
I'd add that, along with sidewall height, other factors obviously come into play such as tyre compound/construction, tread depth, alloy width, suspension setup, alloys/brakes weight, vehicle weight, personal preference, etc.
Some of these will apply to a direct comparison between otherwise OEM setup, some won't, but you get my drift!

[TechNick]

Fitted now and I like them. You notice things like cats eyes more on the motorway but no worse than even my largely standard Cupra!

[t20ary]

Seen that MRC now has a front banner on their site showing they have broken 500 bhp. I did put a message on their page on here to try and find out the list of mods required and advised to achieve this but am yet to hear back. Be interested to hear from Saint400 or any others who know the answer to this question and highlight what is a must and what is optional.

Many thanks

Gareth.

Its PS not BHP

500PS = 493.2BHP

[S5 tony]

I'm running stage 2+ at the moment but waiting for APR to release stage 3 figures are showing 596 hp

[S4WON]

Tony is your 2+ with APR? If so, what is it pushing put?

[S5 tony]

Hi s4won when I had it on the Dyno it was doing 400awhp but it wasn't running right it was suffering from gear change lag it kept dropping off when it was changing gear. to be honest it wasn't nice to drive so it went back in and they mapped the box APR sent a file over from the states now it will hold to around 7100 rpm and much smoother and quicker it's never been back on the rolling road since as the car was away for around 8 months having the body work conversion. Hoping to go stage 3 next year when it's released and yes it's running stage 2+ APR

[S4WON]

Not bad, just curious but i assume you are aware of MRC and thier wizardry? If not, I would strongly recommend you speak to doug first before going stage 3 with apr.

My guess is money is not an object, but hypothetically if you can get 500 awhp from MRC today at a quarter of the cost of the stage 3 from MRC, it may get your attention.., let us know how you get on.

[S5 tony]

I wasn't aware that MRC was getting 500AWHP I thought they was getting that at the crank which mine is probably doing now ? So if they are what are they doing different ?

[S4Player]

I'm running stage 2+ at the moment but waiting for APR to release stage 3 figures are showing 596 hp

You will be waiting a while for that kit I heard they ran into problems with it

[S5 tony]

Not sure about that as they have given a rough price and figures so I'm hoping back end off this year there saying £10K my car is only used when the sun comes out so I'm not pushing but yeh I think I will be getting it

[S4WON]

I wasn't aware that MRC was getting 500AWHP I thought they was getting that at the crank which mine is probably doing now ? So if they are what are they doing different ?

I'm afraid we have surpassed my technical knowledge at this point! What I can say is that I've probably read every thread on the internet about mrc, apr, giac (US) and others.

And my conclusion is that the story on apr is mixed, both here and abroad and is definitely *not* a custom tune (to the car) but MRCs definitely is,

Also that stage 3 will set u back significant cash (and the wait), so if i were you, id check all options. I have a b8 s4 and am seriously considering mods and will definitely be going to MRC if the time comes

[S5 tony]

Iv all ready got the intercooler and the carbon fibre air box back pipe and running stage 2 software engine and box so I'm running what they are doing now give or take a bit with the new charger will give me another 100 bhp and 90 of torque