Interesting Turbo Set UP
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From: The Antagonist
Originally Posted by Slows2k,Jan 28 2007, 06:00 PM
This comes up about every 2 months.
They systems work well on large displacement engines that don't lack low end torque. (most V8's) The gains are smaller with smaller displacement engines, which don't produce the same exhaust volume as a 5+ liter V8.
For those that call it dumb, stupid, Etc. Wait untill a STS equipped domestic walks all over your S2k.
They systems work well on large displacement engines that don't lack low end torque. (most V8's) The gains are smaller with smaller displacement engines, which don't produce the same exhaust volume as a 5+ liter V8.
For those that call it dumb, stupid, Etc. Wait untill a STS equipped domestic walks all over your S2k.
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From: The Beach, CA
Been done on several civics. Doesn't produce the horsepower nor the spool up of the traditional turbo kits. As a matter of fact I believe the boost curve was extremely delayed in comparison. The exhaust gas energy and volume isn't as high as in a large 5.0L+ engine.
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From: Mass
I keep hearing about exhaust volume being too low, but, don't we make up for it with RPMs......
5l motor @2000 rpm = 2500L/m
2l motor @5000 rpm = 2500L/m
Still, this probably why the Civics Kane mentions above have a delayed boost curve.
5l motor @2000 rpm = 2500L/m
2l motor @5000 rpm = 2500L/m
Still, this probably why the Civics Kane mentions above have a delayed boost curve.
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Yeah, these are interesting. I have never seen one work well on a small displacement engine. But I know 2 guys with GTOs who run these things and they are fast! I am not sure what the people who are calling these things stupid, etc are really talking about (and neither do they).
Joined: Jun 2003
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From: Johnstown, PA
Theyre really neat setup except when some kid gets under your car with a hack saw!!!
Ive heard of these setups being stolen before. Just hack before and after the turbo and your gone!
Scary thought actually.
Ive heard of these setups being stolen before. Just hack before and after the turbo and your gone!
Scary thought actually.
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From: Lafayette, LA
Originally Posted by Cubs2k,Jan 28 2007, 10:12 PM
5l motor @2000 rpm = 2500L/m
Yes, I know what you mean. But your example is extreme though.
NA Air Flow rate = displacement * rpm/2 * volumetric efficiency
5 L/rev * (2000/2 rev/min) * 100% = 5000 L/min
2 L/rev * (5000/2 rev/min) * 100% = 5000 L/min
But you are missing a big point. It's not just volumetric flow, it's total energy that drives the turbine. Total energy includes temp, pressure, mass and volume; and energy is conserved. A permutation of the Ideal gas law.
You are losing heat (and therefore energy) as you go downstream. As the exhaust gas cools, it shrinks as well. As it shrinks you lose pressure. With this setup, you're losing pressure upstream of turbine. So less DP across turbine = lower speed of turbine = less boost pressure at compressor.
I have written my opinion on this in a previous thread. Turbine should be as close to head as practical to extract as much energy as possible from exhaust stream.
