After reding the EVO's brochure got some ?'s
Newbie
Joined: Mar 2003
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overboosting early in the rpm can be a sign of compressor surge which is bad. However, everyone says that 19psi is ok for the evo turbo and engine, so i dont think it will cause any harm. its really just for for safety.
seattle944t wrote-
Also, the turbo itself works not only by the exhasut gas flowing past the wheel, by the pressure differential between the area before the compressor and after the compressor. So you want very high pressure, high temp, high velocity, air before the turbo. On the outlet side of the turbo you want as little pressure as possible.
Also, the turbo itself works not only by the exhasut gas flowing past the wheel, by the pressure differential between the area before the compressor and after the compressor. So you want very high pressure, high temp, high velocity, air before the turbo. On the outlet side of the turbo you want as little pressure as possible.
Thanks
Newbie
Joined: Mar 2003
Posts: 50
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From: Seattle
Originally posted by jfh
Agree with most of your post. Understand that smaller diameter exhaust runners will produce higher velocities than larger ones. Higher exhaust gas velocities will spool the turbine quicker. I think the high pressure is merely a by-product of the small diameter runners required to obtain the desired velocity. I'm sure that there is a Boyle's Law or Bernouli Principle or something at work here but it's been 1) 25 years since my last physics lab, 2) a very long day and 3) I'm not thinking clear enough to remember. Nonetheless, my initial confusion stems from your assertion that high temp air is desireable before the turbo. What role does the high temperature play in increasing the exhaust gas velocity or otherwise improving the turbo's performance?
Thanks
Agree with most of your post. Understand that smaller diameter exhaust runners will produce higher velocities than larger ones. Higher exhaust gas velocities will spool the turbine quicker. I think the high pressure is merely a by-product of the small diameter runners required to obtain the desired velocity. I'm sure that there is a Boyle's Law or Bernouli Principle or something at work here but it's been 1) 25 years since my last physics lab, 2) a very long day and 3) I'm not thinking clear enough to remember. Nonetheless, my initial confusion stems from your assertion that high temp air is desireable before the turbo. What role does the high temperature play in increasing the exhaust gas velocity or otherwise improving the turbo's performance?
Thanks