Can someone explain to me why an N53 head is recommended for HP 800s? Compression?

[surge89]

Ive also heard of guys locking the n52 valvetronic in fully opened position but I believe the n54 pistons are designed for di so n53 will probably be far less hassle

 

[EX0PIL0T]

This whole thread - worth the read start to finish.

Technical - Hydra Performance 135 Leichtbau State of the Art Thread

I've decided to create a thread to chronicle all the updates and developments I've put together for my 1er over the past few months. I've given much thought to improving several aspects of our driveline, and came up with several useful observations and - dare I say - new ways of doing things...

www.spoolstreet.com

actual lifesaver