Issue after headers got installed

[corroeric]

I recently got headers installed on my S650 and acceleration is weird now. Anyone having issues after headers installed

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[robvas]

"Acceleration is weird"

can you maybe describe with more detail

 

[corroeric]

"Acceleration is weird"

can you maybe describe with more detail

I accelerate and it sounds like it’s running through the gears not building rpm at all

"Acceleration is weird"

can you maybe describe with more detail

"Acceleration is weird"

can you maybe describe with more detail

 

[Paul's stable]

I accelerate and it sounds like it’s running through the gears not building rpm at all

Any warning lights? is it in limp mode. Headers should generally not cause problems and they don't need a tune. Without anymore information it's hard to diagnose.

 

[Upacurb]

Which brand headers? how many miles since installation?

 

[robvas]

Post a video

auto or manual

 

[Q6543]

Something probably isn’t plugged in, maybe a light will come on

my car drove identical to stock after headers

 

[corroeric]

Which brand headers? how many miles since installation?

Stainless Power and about 300 miles since installation

 

[corroeric]

Post a video

auto or manual

Auto and I’ll record a video tomorrow morning

 

[John boschma]

Mine accelerates weird as well

 

[Junkyard Dog]

Mine accelerates weird as well

What does this mean?

 

[Cz_Ziemniak]

Sometimes when mine accelerates, it goes but the speed does

 

[Junkyard Dog]

Something probably isn’t plugged in, maybe a light will come on

my car drove identical to stock after headers

Did it make a noticeable difference in sound? What about performance?

 

[Q6543]

Did it make a noticeable difference in sound? What about performance?

Picked up 4 tenths in the 1/4… so average roughly 35/40 rwhp gain.
100% worth it, especially if going boosted

I ended up putting a larger resonator on so it’s actually quieter than stock now except going WOT.

 

[Junkyard Dog]

Picked up 4 tenths in the 1/4… so average roughly 35/40 rwhp gain.
100% worth it, especially if going boosted

I ended up putting a larger resonator on so it’s actually quieter than stock now except going WOT.

This is the 2025?

Were the headers on an otherwise stock engine, picking up 4 tenths, or boosted and picked up 4 tenths?

Oh, and would you mind sharing what the larger resonator was? And was this installed with a goal of being quieter or for better flow or another purpose?

Sorry for all of the questions, but I am trying to learn what I can about these cars and what can be done. Thank you for the time it takes you to review and answer.

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