Fluctuating WG pressure
#1
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Fluctuating WG pressure
Attached are two logs. The first is an older log, one of my first, with the stock injectors and a rough tune. It is a fifth gear pull.
The second is from the other day, new 600's, pretty new tune, autotune only. I have since retuned for 12.0>11.5 at redline.
The question that I have is around 5500, the WG pressures really start to oscillate more and more. Is this just a function of the internal WG? Excessive backpressure? I have a 2 1/2" exhaust but a crappy Flowmaster muffler that was on the midpipe when I bought it.
The second is from the other day, new 600's, pretty new tune, autotune only. I have since retuned for 12.0>11.5 at redline.
The question that I have is around 5500, the WG pressures really start to oscillate more and more. Is this just a function of the internal WG? Excessive backpressure? I have a 2 1/2" exhaust but a crappy Flowmaster muffler that was on the midpipe when I bought it.
Last edited by Stein; 04-15-2009 at 09:16 AM.
#12
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From: Nebraska
Well, no joy on the pop rivet restrictor. It's possible the .060" hole was still too big. I can try smaller. Doesn't cost anything. Didn't notice any difference in how fast kPa's change either when you are on and off the throttle.
Magna mentioned backpressure. That is distinctly possible. I'm running 2 1/2" but it has a Flowmaster on it which I understand restricts flow. It came on the midpipe, so I thought I would try it. I'm planning on a Magnaflow soon.
Magna mentioned backpressure. That is distinctly possible. I'm running 2 1/2" but it has a Flowmaster on it which I understand restricts flow. It came on the midpipe, so I thought I would try it. I'm planning on a Magnaflow soon.
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