Stage 4 supporting mods?
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Joined: May 2023
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From: Northern California
'21 C63S, '24 GLE53
Stage 4 supporting mods?
For those of you who have gone Stage 4 turbo, what supporting mods have you done? There isn't much posts or literature on this for this platform.
DP and intakes are a given, but what else?
Water meth? Heat exchange? Fuel? Maybe even internals?
DP and intakes are a given, but what else?
Water meth? Heat exchange? Fuel? Maybe even internals?
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C43
I am not sure what you mean by “stage 4” - as the “stage” concept is generally a marketing term/concept. Generally stage 1 versus stage 2 for this platform denotes downpipes and a tune to adjust for the reduction in back pressure.
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C43
900+ horsepower (whp) would put you in rare company on this platform. That said, most certainly fueling upgrades and cooling upgrades are necessary (WMI would be a good thing too - as assists with these two points). Custom tune is obviously necessary too.
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From: Northern California
'21 C63S, '24 GLE53
Just spoke with my tuner. He says that heat exchanger, water methanol, and intakes should be enough for ~950 horsepower (crank).
It's not until you want to run more boost (1000 crank hp and beyond) that you need to do fuel injectors and engine internals.
It's not until you want to run more boost (1000 crank hp and beyond) that you need to do fuel injectors and engine internals.
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Thread Starter
Junior Member
Joined: May 2023
Posts: 57
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From: Northern California
'21 C63S, '24 GLE53
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2007 E350
it's pretty well known that our stock fuel pump maxed out at around 700 whp. Trans need reinforcement for stage 4 turbo along with cooling upgrade, some internal upgrade (piston) and lastly a tuner such as PTG who knows what they're doing
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