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Old 01-29-2011, 12:49 PM   #1
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Exclamation Need input from E85 powered miatas!!!!

If you run a knock sensor, please answer this:

Do YOU ever pick up knock around 4500-5500RPM?

Everyone says that is just "miata engine noise range" BUT if E85 miata engines DO NOT KNOCK then that means there is actual detonation at that range for us dinosaur gas folk.
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Old 01-29-2011, 02:02 PM   #2
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Do you ever read what you type before clicking "post"?
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Old 01-29-2011, 02:10 PM   #3
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Turbo not hit block..... or fender well?
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Old 01-29-2011, 02:21 PM   #4
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????? I think the question and the reasoning is pretty clear-

If your knock sensor on your e85 powered motor picks up knock in that RPM range, that will validate the whole theory that our motors are noisy in that range, and no actual knock is occurring.
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Old 01-29-2011, 02:52 PM   #5
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So you're looking for validation of some garbage theory that says your motor isn't actually knocking at 4500-5500rpm because "its noisy", even though your knock sensor says it is?
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Old 01-29-2011, 03:12 PM   #6
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Yes. Personally, I don't believe in the "our motors are noisy" theory. Indicated knock on E85 or lack thereof should prove if it is the motor or detonation.

Last edited by Faeflora; 01-29-2011 at 03:38 PM.
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Old 01-29-2011, 03:41 PM   #7
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pull back 10 degrees of timing and check again?
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Old 01-29-2011, 04:28 PM   #8
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Old 01-29-2011, 04:49 PM   #9
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It might be the pepto bismol you spilled on your intercooler pipes.
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Old 01-29-2011, 05:01 PM   #10
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Quote:
Originally Posted by 18psi View Post
Yes. That ****. Is it present on E85 miatas.

As for everyone else with the smartass comments, I'm trying to get some empirical evidence here. You can act like morons if you want but my question is a good one.
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Old 01-29-2011, 05:05 PM   #11
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It is still present on my car and has been since the 1st day I started using e85.
I know for a fact my car is not knocking

Without fine tuning and verification with det cans/etc the stock nb sensor is absolutely useless. Period.

Last edited by 18psi; 01-29-2011 at 05:42 PM.
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Old 01-29-2011, 05:34 PM   #12
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One more data point from someone please. Anyone?
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Old 01-29-2011, 11:30 PM   #13
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You are asking people with different ECUs, and therefore different sensor filtering, and then making an inxcredibly dangerous assumption based on that irrelevant data.

You've been here long enough to know that if you get snarky comments, the question you asked is probably dumb.
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Old 01-30-2011, 12:12 AM   #14
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Ok then post ur knock **** with ecu. Grr
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Old 01-30-2011, 12:20 AM   #15
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Old 01-30-2011, 12:28 AM   #16
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Old 01-30-2011, 12:29 AM   #17
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Old 01-30-2011, 12:30 AM   #18
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Old 01-30-2011, 01:00 AM   #19
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The fuel you are burning is probably not going to make that noise go away. It is just noise from the engine mechanical components, most of it from the lifters IIRC. It is not 'knock' but engine noise that a knock sensor can mistake for knock.
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Old 01-30-2011, 01:55 AM   #20
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Nothing that can't be solved with a sawzall anyhow
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