I always thought gate size was more dependent on power being made not necessarily engine displacement. If you are flowing x amount of CFM for X amount of power then your gate needs to be able to flow enough of a percentage of that overall CFM to keep things in check , also in most cases your turbo back half can't flow enough cfm for the turbos rated power, so the excess CFM has to be provided by the gate. TLDR Gate size is better determined by flow demand not displacement. A 1.8l engine making 900hp will need more gate than a 5l engine making 500hp.
More volume than flow. A 2.0L engine turning 11k rpm at 40lbs of boost will need a larger gate than your standard 2.0L at 15lbs of boost since it’s moving more air. You can’t go just off power, because for large displacement engines that move a lot of exhaust without boost will need to have a larger gate to keep boost from spiking. There’s ways to go into technicalities for many different scenarios, I’m just trying to keep the video relatively short and simple.
Been a minute! I always love to talk about turbo components.
Sick video dude 😊
Dang I missed your videos!
I always thought gate size was more dependent on power being made not necessarily engine displacement. If you are flowing x amount of CFM for X amount of power then your gate needs to be able to flow enough of a percentage of that overall CFM to keep things in check , also in most cases your turbo back half can't flow enough cfm for the turbos rated power, so the excess CFM has to be provided by the gate.
TLDR
Gate size is better determined by flow demand not displacement.
A 1.8l engine making 900hp will need more gate than a 5l engine making 500hp.
More volume than flow. A 2.0L engine turning 11k rpm at 40lbs of boost will need a larger gate than your standard 2.0L at 15lbs of boost since it’s moving more air. You can’t go just off power, because for large displacement engines that move a lot of exhaust without boost will need to have a larger gate to keep boost from spiking. There’s ways to go into technicalities for many different scenarios, I’m just trying to keep the video relatively short and simple.