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Old 11-30-2012, 01:10 PM   #26
Badler
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Drew, let's just be honest and not derail the thread anymore. You and/or your buddy are never building, getting the supporting mods and tuning one of these. Ever.




























Ever.
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Old 11-30-2012, 01:32 PM   #27
drewvdw
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I never did say we were for sure. I said we were considering it. You've been an ******* at multiple points with no justification. Even if we didn't, what business is it of yours?
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Old 11-30-2012, 01:45 PM   #28
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Whatever. You're the one that brought it up and asked if a guy was interested in you guys making them one.

Post a build thread.
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Old 11-30-2012, 01:58 PM   #29
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Post a build thread... and link it here. I have a theory on this. But its not going to be in the time or money budget for the racecar this year.
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Old 11-30-2012, 02:09 PM   #30
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That's our problem, time and money. We're short on both as well as me moving to Wyoming in a month.
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Old 11-30-2012, 02:15 PM   #31
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You guys realize that the turbo alone that is capable(that's even relative) of surviving is $10k+ for a used one.
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Old 11-30-2012, 02:18 PM   #32
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I'm not sure why, it only operates at 600*C (1100*F) and doesnt create massive thrust and impact loads like normal anti-lag. The only way I can see it damaging the turbo is if you dont have a way to prevent compressor surge.
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Old 11-30-2012, 02:23 PM   #33
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I guess I should be more specific, a turbo that can handle anti-lag without having to be constantly rebuilt. Not to mention the location the turbo needs to be in.

FYI: You can just buy them already made: http://www.subaruwrcspares.com/11.html


I'm really done this time. Sorry Turbo for the derail!

Last edited by Badler; 11-30-2012 at 02:31 PM.
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Old 11-30-2012, 02:36 PM   #34
Leafy
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But theres a significant difference between normal, bang bang anti-lag and the rocket. One of them creates high pressure shockwaves in the exhaust that beat the heck out of the turbine and the bearings, and significant egts. The rocket, if it works any where near how I think it does, creates a smooth controlled burn at sub sonic speeds and egts lower than my normal operating parameters. The only real difficult thing on the turbo you need is the speed sensor, which requires some tricky machine work on the compressor housing unless you're using an EFR. But the devil is in the details, designing and testing the thermal reactor, and actually manufacturing one that wont fatigue fail and actually functions. Preventing surge, providing fuel for the reactor. And the controls nightmare of everything involved.
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Old 11-30-2012, 02:40 PM   #35
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^^^Exactly, that's why I said that theoretically it isn't all that difficult. The practice is the hard part.
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Old 11-30-2012, 09:45 PM   #36
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^^^ this is correct
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Old 11-30-2012, 09:53 PM   #37
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Quote:
Originally Posted by hutch959 View Post
^^^ this is correct
Insightful post chap.

Leafy, I was basically using the turbo as hyperbole. Your last few sentences summed it up perfectly.The idea of building it/tuning it/taking advantage of it is far out of the realm of anybody in this thread. Just the $$$$$ involved to start is crazy enough.
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Old 11-30-2012, 10:23 PM   #38
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And its outside the need of most of us. I may not even attempt it if I find the transient response of the efr6258 sufficient for my racecar. If not I'll prototype with mild steel, which my rough math says should withstand the thermal enhanced fatigue under an hour of runtime. That would cut development costs significantly, rather than trying multiple combuster geometries out of inconel. I did discover today that OpenFOAM can also model combustion which should help to further cut costs and time. I dont have time to go further in depth, got to go back to working on this nuclear engineering paper.
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Old 11-30-2012, 10:29 PM   #39
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Quote:
Originally Posted by Leafy View Post
And its outside the need of most of us. I may not even attempt it if I find the transient response of the efr6258 sufficient for my racecar. If not I'll prototype with mild steel, which my rough math says should withstand the thermal enhanced fatigue under an hour of runtime. That would cut development costs significantly, rather than trying multiple combuster geometries out of inconel. I did discover today that OpenFOAM can also model combustion which should help to further cut costs and time. I dont have time to go further in depth, got to go back to working on this nuclear engineering paper.
Are you going to get a Pectel to run it? Something else in mind?
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