lose PSI on headers

[Nico3k]

I was reading some article and it said that if you are sc/FI than you will lose PSI when installing headers. They say you lose intake manifold boost or something.
Is this true? Would headers even be worth it then if you are going FI? Maybe rennsport or anyone can shed some light on this.

thanks

[richbmw323]

Back pressure drops, so yes probally

[K-DOG]

??? Thats pretty much wrong. A supercharger is connected via a pulley to the engine itself. The faster the engine turns(as rpm rise) the faster the pulley spins, the faster the S/C spins and produces boost. By changing the headers all you are doing is making the engine release exhaust gasses faster, thereby making it more efficient. If an engine is more efficient, it will reach top RPM's faster, and make the S/C build boost faster as well.

[Mr Paddle.Shift]

The quick answer to your question about pressure loss is <B>yes</b>. If you install a pressure gauge at the intake manifold, with a better flow headers, you will notice a pressure drop.

But...

the SC will be able to get more airflow through the system. Hence more power even if the boost is less.

The popular misconception is high boost <i>always</i> mplies high output. Not always. If the vanes of the compressor is well designed, along with a less restricted exhaust system, a low boost can produce a good output.

I was reading some article and it said that if you are sc/FI than you will lose PSI when installing headers. They say you lose intake manifold boost or something.
Is this true? Would headers even be worth it then if you are going FI? Maybe rennsport or anyone can shed some light on this.

thanks

[erick-323i]

This is an interesting Thread... I just added Headers and full free flow exhaust (no cats, one highflow resonator); it definetely add more HPs. Haven't done a proper Dyno, but the G-tech shows a half a second improvement in the 1/4 mile.

Now to Mr.Paddleshift's comment about loosing boost; interesting response... could this mean that we could boost more due to lost psi in increasing efficiency? Maybe this means that I can go from 8psi to 10psi :yikes: ..hehe... just speculating :rolleyes: Opinions?