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Old 12-31-2013, 01:21 AM   #1
superdonkey23
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Default IDC's too high?

Should my IDC's be this high? I'm running a TP stage 2 with a catless DP. Keep in mind it was about 27 degrees during this pull.

https://drive.google.com/file/d/0B8I...it?usp=sharing
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Old 12-31-2013, 09:16 AM   #2
mikeydrives1
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Well, the car isnt knocking which is good, but im assuming you have stock sized injectors?

And yeah, Generally in cold weather you will see boost spikes and more fuel usage.... Reasoning behind that is that cold air is more dense and does not compress as easily, so you will need more fuel to compensate. Any logs of a WOT pull prior to this temperature drop? It seems to me that you need bigger injectors, these are pretty much maxed out.
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Old 12-31-2013, 03:41 PM   #3
Breezio
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Thanks for sharing that. Makes me curious.

My recently data logs (TP Stage1), with cold weather (~37 degrees) show a bit less boost (as expected) but with perhaps a hint of knock in the middle rpm's and up near redline my IDC's are HIGHER then yours...
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Old 01-02-2014, 10:32 AM   #4
mikeydrives1
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Knock isnt good. Who is your tuner? That needs to be addressed soon if its a re-occurring issue.

Last edited by mikeydrives1; 01-02-2014 at 10:40 AM.
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Old 01-02-2014, 10:34 AM   #5
kellygnsd
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Quote:
Originally Posted by mikeydrives1 View Post
Well, the car isnt knocking which is good, but im assuming you have stock sized injectors?

And yeah, Generally in cold weather you will see boost spikes and more fuel usage.... Reasoning behind that is that cold air is more dense and does not compress as easily, so you will need more fuel to compensate. Any logs of a WOT pull prior to this temperature drop? It seems to me that you need bigger injectors, these are pretty much maxed out.
Actually colder air is more dense and comprsses easier that why your more prone to overboost in cold weather. Denser air contains more oxygen therefore requires more fuel.

You where right and wrong at the same time.
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Old 01-02-2014, 10:35 PM   #6
superdonkey23
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Thanks for the input guys. I don't have any logs from warmer weather since I just went stage 2. The only reason I'm a bit worried is that I am in Kentucky right now at like a 2000ft altitude, and I'll be going to Florida next week where I'll be at damn near sea level. Would the thicker air there make my IDC's even higher?
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Old 01-05-2014, 11:04 AM   #7
mikeydrives1
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Yes, yes they would . Good observation though, most ppl wouldn't pick up on that fact. I'm assuming you have a stock fuel pump as well?

Also, as mentioned before, as air warms up it won't compress as readily so you will see a drop in performance to some degree.
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Old 01-06-2014, 05:17 AM   #8
superdonkey23
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Quote:
Originally Posted by mikeydrives1 View Post
Yes, yes they would . Good observation though, most ppl wouldn't pick up on that fact. I'm assuming you have a stock fuel pump as well? Also, as mentioned before, as air warms up it won't compress as readily so you will see a drop in performance to some degree.
Would a better fuel pump cut my IDC's down a bit?
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Old 01-06-2014, 07:02 AM   #9
JonnyV2889
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Quote:
Originally Posted by superdonkey23 View Post
Would a better fuel pump cut my IDC's down a bit?
This seems to be the general consensus. At least a few points.
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Old 01-06-2014, 02:08 PM   #10
mikeydrives1
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I havent proved it myself on paper to show you, but theoretically yes, if you increase the fuel pressure and the ability to deliver the fuel to the injectors, it should ensure better fueling despite the size of the injectors, but only by a little though. Overall, its better to have that abundance of delivery pressure coming up the line.
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