S54 na power

[BinBuilt]

So I was wondering what’s the best way to go to squeeze as much power as I can out of the s54 without actually going forced induction, I know this should be the last of my worries considering I have a 204k mile s54 who the previous owner dogged on but I’m just curious.

[Sharocks]

What's your budget?

Then do maintenance first since it's at 204k.

If you have money left over get a CSL intake and a tune.

[oceansize]

What he said. Then move to e85 and another tune, that's the path on most NA cars. Then if you want to dump money, cams.

[D-O]

Partee Racing stroker motor.

[siamkazi]

Partee Racing stroker motor.

This is the way.

[PSUEng]

OP: At 204k, you need to prioritize basic maintenance. Once that's covered, OK do the mod thing. How much money you got?

[bigjae46]

The simplest formula is headers, bimmerworld race exhaust, epic motorsports tune. Got me to 337whp. It will be loud.

[oceansize]

Out of curiosity bigjae46, why haven't you moved to e85? On many other NA cars that appears to be the progression, if wanting to stay NA. Eek out another 10-20% depending on platform.

[bigjae46]

Out of curiosity bigjae46, why haven't you moved to e85? On many other NA cars that appears to be the progression, if wanting to stay NA. Eek out another 10-20% depending on platform.

Couple of reasons.

First, cost. E85 in TX isn't widespread. Maybe 1 in 50 gas stations will have it. It's TX so gas is cheaper because of state taxes and transportation costs. I'm close to 6 major refineries with two massive pipelines which serve all of the tracks in TX. There is maybe a $1.50 per gal difference between 93 and E85 - most people say they spend more running E85.

Logistics - I'd have to start with a full tank and carry at least 4 jugs of fuel to make it through a full day to end the day on empty. Which means I would need 6-7 jugs to make it through the next day. My car isn't street legal and the tracks in TX do not have E85 on site. That means I am transferring 10+ jugs of fuel into the tank per weekend.

Weight - I'm probably the only one that will be affected. Since my car is 2500lbs or less dry I can feel the difference in weight between a full tank and 1/4 tank. Not massive but a difference nonetheless.

Rules - Most of all, I don't need the power. I detune to 244hp for ST4/TT4 with NASA and I'm getting close to the ballast limit. I will need more power if I get into ST2/TT2, may consider E85 then.

[liam821]

CSL intake, headers with a full exhaust, and a tune is the tried-and-true method. Will get you around 335whp. Anything more requires a lot of money and the right combination of parts; you'd be better off with a supercharger if you're chasing power figures.

[DJAM3]

Add cams to that formula and you'll get closer to 350whp

[Altaran]

At 204k? Rebuild from the ground up with forged internals, ported heads,... I wouldn't start with going outside in, at 204k with unknown state of internals it's better to start clean.

If you're looking for serious n/a power, engine swap or car swap 😂

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[Obioban]

Out of curiosity bigjae46, why haven't you moved to e85? On many other NA cars that appears to be the progression, if wanting to stay NA. Eek out another 10-20% depending on platform.

I've never seen anything like 10% from e85 on the S54, at least compared to 93 octane. More like 5-10 hp, in a comparison where all else is equal (including a bespoke tune before/after, not generic vs car specific e85).

[oceansize]

I've never seen anything like 10% from e85 on the S54, at least compared to 93 octane. More like 5-10 hp, in a comparison where all else is equal (including a bespoke tune before/after, not generic vs car specific e85).

Kind of what I was wondering. A tune and e85 in the 5.0 coyote gets you a solid chunk of go fast for almost no effort.

[Obioban]

I’d also expect e85, and corn in gas in general, to go away over the next decade, so may not be a great idea to build your car around it.