Basic Question
- Thread starter akwilks
- Start date
jjorgensen52
NHSTE - I'm the only one!
Re: Basic Question
As I understand it, the stall speed has everything to do with turbine A/R. Essentially, A/R is a measured of the amount of exhaust the turbine can flow. So, the higher the A/R, the higher your stall needs to be. The stock A/R is .6x if memory serves, and the stock stall is 2300 or therabouts. I could build 10 - 12 psi on the brakes with that combo. My garrett is a .82 A/R and I'm still running the stock stall, so now I can build about 4psi off the line. You need the RPM's up a little higher to get the additional flow. I'm planning a 2800 stall for my truck in the future, as that seems to keep turbos in my range happy.
Now, there isn't a set ratio as there are other factors, but that is a rule of thumb I have observed
As I understand it, the stall speed has everything to do with turbine A/R. Essentially, A/R is a measured of the amount of exhaust the turbine can flow. So, the higher the A/R, the higher your stall needs to be. The stock A/R is .6x if memory serves, and the stock stall is 2300 or therabouts. I could build 10 - 12 psi on the brakes with that combo. My garrett is a .82 A/R and I'm still running the stock stall, so now I can build about 4psi off the line. You need the RPM's up a little higher to get the additional flow. I'm planning a 2800 stall for my truck in the future, as that seems to keep turbos in my range happy.
Now, there isn't a set ratio as there are other factors, but that is a rule of thumb I have observed