What kind of issues would I see with a turbo with to small of a an AR on the turbine?
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What kind of issues would I see with a turbo with to small of a an AR on the turbine?
Running 2 60 mm compressors at 1000 hp with ex turbin AR of .68. seems very touchy for tulipping valves. It is a 260 ci running e85 @ 15 lbs @ 7200 rpm.
Last edited by jet1 on Tue Feb 18, 2020 6:12 pm, edited 1 time in total.
Re: What kind of issues would I see with a turbo with to small of a an AR on the turbine?
Hard to say without more info.
What size motor? Rpm range? What size turbine wheel? How much boost?
Any backpressure readings?
What size motor? Rpm range? What size turbine wheel? How much boost?
Any backpressure readings?
Re: What kind of issues would I see with a turbo with to small of a an AR on the turbine?
Ya sorry got pulled away and didn't realize that I hit post. Edited it. I do not have any back pressure measurements but will be doing that. I guess wondering what I should be seeing at the turbo flange?
Re: What kind of issues would I see with a turbo with to small of a an AR on the turbine?
Thats doing well on just 15 psi for 260 inches. But i dont think you would have issues with those turbos assuming turbine is in the high 50’s mm low 60’s mm or bigger.
I ran 60mm compressors with 65 mm turbines and .68 ar on my mild 400 sbc and only turned 5500 rpm making 800 hp crank 640 whp. 14 psi. No issues
I ran 60mm compressors with 65 mm turbines and .68 ar on my mild 400 sbc and only turned 5500 rpm making 800 hp crank 640 whp. 14 psi. No issues
Re: What kind of issues would I see with a turbo with to small of a an AR on the turbine?
Thanks, that is good to know. Ya the power is decent if I could keep it together. it will be going back on the dyno in a month, so I am just trying get things to look at. timing is another thing which seems high to me at 32 deg all the way up to 22 lbs.