Just checked my RR graph, and why does my PSI Drop?
#1
Scooby Regular
Thread Starter
Join Date: Jan 2006
Location: Mansfield. Nottingham
Posts: 604
Likes: 0
Received 0 Likes
on
0 Posts
Just checked my RR graph, and why does my PSI Drop?
Car is an MY03 JDM STi
Just having a scan through my Rolling road print out from scoobyclinic,
at 2800rpm it goes from 6psi to 21psi at 4000rpm, then thats it, drops down straight after that going to 19 at 5k revs, all the way down to 16 at around 6.4k, is that normal?
Why cant I have 21 psi all the time ?
Just having a scan through my Rolling road print out from scoobyclinic,
at 2800rpm it goes from 6psi to 21psi at 4000rpm, then thats it, drops down straight after that going to 19 at 5k revs, all the way down to 16 at around 6.4k, is that normal?
Why cant I have 21 psi all the time ?
#3
#4
Scooby Regular
iTrader: (1)
Join Date: Apr 2005
Location: In the Flatlands of Lincolnshire
Posts: 2,892
Likes: 0
Received 0 Likes
on
0 Posts
The main reason for this is that as the volume of air required by the engine increases the turbo starts to run out of puff so pressure drops. To get an idea try blowing hard down a narrow piece of plastic pipe then try down a piece of hose pipe. You will find it more comfortable to blow down the hosepipe as the pressure is less.
Thread
Thread Starter
Forum
Replies
Last Post
fatboy_coach
General Technical
15
18 June 2016 03:48 PM