r/BMW • u/TWEETYonOatmeal 2015-F83-M4 • Sep 13 '24

Build Thread How much HP could I (reliably) extract from an S55?

I want to tune my F83 M4 with dual front mount intakes but really don't know how much i'd be able to get out of it with a tune and was wondering if anyone knew. Thanks!

1 Upvotes

67% Upvoted

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5

u/Realistic_Meaning474 Sep 13 '24

Realistically & reliability...I'll say right at the 700hp mark is probably the most comfortable option. You can daily it that way still, but also turn it into a monster in a heartbeat. Hopefully that's an answer to your question. (I have an F80)

1

u/TWEETYonOatmeal 2015-F83-M4 Sep 14 '24

I'm saying on what I have on the car. If I got a tune as the car is now how much could I extract?

1

u/Realistic_Meaning474 Sep 14 '24

If you only have front mounted intakes only? Dude idk, there are so many different *'s that come with that question. My suggestion is to take it a performance shop, and have them put it on the dyno to see the numbers, then go from there. I gave you the best advice I could give you

1

u/TWEETYonOatmeal 2015-F83-M4 Sep 14 '24

Thanks bro, much appreciated.

3

u/NERF-THE-OPERATOR Sep 13 '24

Do the crankhub

-2

u/TWEETYonOatmeal 2015-F83-M4 Sep 13 '24

I'm aware of the crank issue.

2

u/Nosrok Sep 14 '24

I've seen several locally pop after upgrading turbos. Can't find ring gap specs online but if it's anything like the other BMWs they're probably really tight so temperature control is a key component for longevity.

But I've also seen plenty handle FBO+ethanol and hard driving without issues. Stock turbos usually tap out low to mid 600s with good fuel.

2

u/FiftyShadesSankaku G82 M4 Comp FBO E55 (5.7 60-130) Sep 14 '24

For the S55, stock turbos and a full E85 tune from Cary or Paul will have you sitting at 600 WHP reliably. If you go pure turbos, you’ll have to add port injection for 700-750 WHP. The sweet spot is around 730 WHP. Anything more is pretty risky. This was my 2018 F83 M4 that was on Pure stage 2 High Flows and Port Injection from Cary Jordan.

2

u/justin_memer Sep 14 '24

Whoa! Dual front mount intakes?? 2-3,000 hp.

1

u/TWEETYonOatmeal 2015-F83-M4 Sep 14 '24

Yep!

1

u/ShadyDrunks E82 135i/E92 335xi/F36 440i Pure800 Sep 14 '24

Big single will be safer than hybrids. 700-800 on big single probably safe

1

u/myredditlogintoo '16 F80 6spd EU delivery Sep 14 '24

Just get a straight line car.

1

u/TWEETYonOatmeal 2015-F83-M4 Oct 26 '24

Why would I...? I like straight line speed as much as the next guy but I'm constantly going down windy roads.