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Old 06-19-2008, 10:17 AM   #1 (permalink)
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Default Easy Question (Not 4 me Obviously)

My question is if I have light mods as Stage 1, a kinetic wastegate, Boost controller set to 18-19lbs, and an intake. Is it really necessary to check my Knock/AF ratio??? I don't have anything to monitor this stuff, so I really don't have time to go to get it to a performance shop to check all that stuff, So with all this light mods do you think I should be ok with out actually checking or is it a big deal and I should definitely find a way to go n get this checked out??? Thanks for any help.
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Old 06-19-2008, 10:47 AM   #2 (permalink)
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MOTHER OF GOD.
tell whoever needs this question answered to sell the aftermarket parts, then sell the car, and buy a hybrid.
YES YOU NEED TO MONITOR THAT.
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Old 06-19-2008, 10:51 AM   #3 (permalink)
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he just said the question isnt for him so he doesnt get flamed to hell.
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Old 06-19-2008, 10:54 AM   #4 (permalink)
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Quote: Originally Posted by 91PumpKing. View Post
he just said the question isnt for him so he doesnt get flamed to hell.

No it is for him, but the question isn't easy for him to answer... Meaning it may be easy for us to understand, but not him

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Old 06-19-2008, 10:54 AM   #5 (permalink)
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i ran a setup like that and my air fuels were at 12.2 or 12.3 .....sooo yeah monitor that
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Old 06-19-2008, 12:10 PM   #6 (permalink)
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Here's what I don't understand. Why? Why do you have to monitor that (for small modifications)? Might as well go back to carburetors then. I thought EFI was the best thing since sliced bread because it auto adapts (to elevation, temperature, etc.).

If you have a scan gauge, you know the PCM gets a shitload of info from various source/sensors all over the car, including AFR. So why can't it see "shit, I'm running a bit lean, let's pump some more fuel" instead of bluntly ignoring what the sensors are screaming at it?

Unless the restriction is at the physical level (fuel pump, rail, injectors, etc). Then it makes sense. Otherwise, you would think the PCM should be able to do that kind of small rectifications.

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Old 06-19-2008, 12:16 PM   #7 (permalink)
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Quote: Originally Posted by tamadx View Post
i ran a setup like that and my air fuels were at 12.2 or 12.3 .....sooo yeah monitor that

What where u using to check ur levels???
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Old 06-19-2008, 12:18 PM   #8 (permalink)
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Quote: Originally Posted by thuggishtavo View Post
What where u using to check ur levels???

His sig says he has an NGK Wideband.
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Old 06-19-2008, 12:24 PM   #9 (permalink)
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Quote: Originally Posted by JPGIII85 View Post
MOTHER OF GOD.
tell whoever needs this question answered to sell the aftermarket parts, then sell the car, and buy a hybrid.
YES YOU NEED TO MONITOR THAT.

It was a simple question either yes or no, don't need to be a fucking douche!! I know u have to check the fuel mods for a big turbo car, I just wasn't sure u had to it for car with such small mods!!
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Old 06-19-2008, 12:29 PM   #10 (permalink)
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Quote: Originally Posted by Crazyced View Post
His sig says he has an NGK Wideband.

Oh I didn't see the lower half of his sig. Thanks!
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Old 06-19-2008, 12:41 PM   #11 (permalink)
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I think it's always a good idea to monitor things such as knock when you are raising the boost levels. Invest in a scan gauge at least.
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Old 06-19-2008, 12:44 PM   #12 (permalink)
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Quote: Originally Posted by Crazyced View Post
Here's what I don't understand. Why? Why do you have to monitor that (for small modifications)? Might as well go back to carburetors then. I thought EFI was the best thing since sliced bread because it auto adapts (to elevation, temperature, etc.).

If you have a scan gauge, you know the PCM gets a shitload of info from various source/sensors all over the car, including AFR. So why can't it see "shit, I'm running a bit lean, let's pump some more fuel" instead of bluntly ignoring what the sensors are screaming at it?

Unless the restriction is at the physical level (fuel pump, rail, injectors, etc). Then it makes sense. Otherwise, you would think the PCM should be able to do that kind of small rectifications.

It corrects at part throttle, but WOT is a whole different map. The oxygen sensors don't read the AFR it should be at at WOT... So it can't tune itself.
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Old 06-19-2008, 12:58 PM   #13 (permalink)
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Quote: Originally Posted by Mana4real View Post
It corrects at part throttle, but WOT is a whole different map. The oxygen sensors don't read the AFR it should be at at WOT... So it can't tune itself.

If the sensor is the problem, wouldn't your gauge's reading be screwed up too then?
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Old 06-19-2008, 01:05 PM   #14 (permalink)
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Quote: Originally Posted by Crazyced View Post
If the sensor is the problem, wouldn't your gauge's reading be screwed up too then?

The wideband gauges use their own sensor.
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Old 06-19-2008, 01:18 PM   #15 (permalink)
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Quote: Originally Posted by b4christ15 View Post
The wideband gauges use their own sensor.

That's true and I assume you can't feed a wideband gauge to the PCM.
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