So it’s a good idea to “trick” the IAT sensor into not pulling timing so it will run stronger? Doesn’t the PCM pull timing to eliminate spark knock? How do you know you have not created a situation where you are getting pre-ignition but not enough to hear it?
And the most obvious, why not just add the timing through your tuner opposed to building a box?
The before-and-after IAT differences with identical ambient temps as noted in my initial post clearly indicates that this mod forces the engine to suck in more cool outside air and less hot underhood air when the car is standing still. As such, it is not "tricking" the PCM into not pulling timing, and thus it will not cause pinging.
The before-and-after IAT differences with identical ambient temps as noted in my initial post clearly indicates that this mod forces the engine to suck in more cool outside air and less hot underhood air when the car is standing still. As such, it is not "tricking" the PCM into not pulling timing, and thus it will not cause pinging.
Adding timing with the tuner can cause pinging.
It's not tricking anything really. You are actually providing cooler inlet air. This isn't like adding a resistor to the IAT sensor to tell it that warm air is 20* cooler.
I don't think that's the case. He's actually provided cooler air by doing this.
Originally that was the flaw in the testing I pointed out. He has not proven that he has indeed reduced the IAT, only that he has reduced the IAT where the IAT sensor is. I’ll bet money that the decrease I temp he is seeing is negated by the time the air enters the motor which is the only IAT that counts. IAT’s are not linear. If you get a 15 deg drop in air going past the IAT sensor you will not get a IAT drop at the intake port that is also 15 deg less. So, if the PCM is adding timing based on the cooler IAT sensor reading it could very be possibly be on the verge of detonation.
It may not be an issue on a NA car that can get away with running leaner without any horrible side effects but doing this on a FI car could be fatal.
The only true way to quantify the “test” is to have a IAT sensor gage right at the intake port (not very hard). Until that is done there is no telling where the motors new “briskness” is coming from. Case in point, and a extreme one to make the point and make it obvious. If you were to run a teeny tiny NOS nozzle right in front of the IAT sensor it would tell the PCM you are I Alaska and start piling the timing on. But there is o way that teeny tiny nozzle is cooling the “net” IAT going into the cylinders the same amount that the IAT sensors sees.
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Under Construction. Better, Stronger, Faster than it was before.
The before-and-after IAT differences with identical ambient temps as noted in my initial post clearly indicates that this mod forces the engine to suck in more cool outside air and less hot underhood air when the car is standing still. As such, it is not "tricking" the PCM into not pulling timing, and thus it will not cause pinging.
Without having a IAT sensor in a intake port as well as in the OEM location you do not have the data to back up your claim. The only claim you can make is that the air going past the IAT sensor is cooler, that's it. You can't claim the air entering the cylinders is cooled the same amount or if it is cooled at all.
Quote:
Adding timing with the tuner can cause pinging.
Your kidding? Really?
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Under Construction. Better, Stronger, Faster than it was before.
It's not tricking anything really. You are actually providing cooler inlet air. This isn't like adding a resistor to the IAT sensor to tell it that warm air is 20* cooler.
He is tricking it if the temp drop seen at the IAT is not the same as the temp drop see at the intake port. Which we don't know.
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Under Construction. Better, Stronger, Faster than it was before.
So with all the post are we saying cold air intakes dont work? I would agree that a better point to take temp is from the intake but Ford has deemed it safe for N/A cars to take it at maf and calculate out (not ideal but safe) cool air in has to help. For f/i you must move the iat to the intake because of the increase air temp of the f/i and the pmc needs to know the air temp after the f/i not before it. I believe the post was just about a cheap way to get cooler air and the information he has posted states that he was able to get cooler air. Also he is not tricking it cooler air is just that cool air. Are all the cai kits out there just tricking pmc? Putting a tiny nozzle on the ait would be tricking it.
I've always had a little heart burn with the way Ford designed the fresh air intake. Bad idea.
Based on independent testing it has been demonstrated that the JLT fresh air intake and tune does produce the best bang for the buck with C&L a close second place.
When I first bought my '05 back in Jan of '06 the first thing I did was install a C&L true flow, made good power, but I still was not happy with the location due to the heat that built up under the hood when not moving. Believe me when I say that I explored all the options of rerouting the fresh air intake tubing into the fender well or down into the lower grille area. Aint gonna happen, no room to get there.
So, took out the C&L and installed a WMS 80mm ram air intake. To help even further, the top of the intake is sealed against the hood with rubber weather stripping. The WMS bottom plastic bottom piece has two slots on each side 1-1/2" x 7", I ran flex tubing from these slots down to each side of the lower grille where air is forced into the WMS when moving.
Over the last couple of years I have been running a remote temperature sensor attached directly to the intake filter where I can see the intake temperature from inside the car at all times. ($7.95 from Lowes - in the Garden Section)
Dont laugh, but I have been thinking about installing a water to air inter cooler. This should work well. Still in the planning stages.
I'll try to dig up the pictures.
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2005 Mustang GT Automatic Screaming Yellow
WMS 80mm HV Intake W/ Ram Hood
SCTuning by John and Matt - Mustang Muscle Performance
93 Octane Race and transmission tune
Saleen Stainless Steel UDP's, BMR Front Sway Delete,
PH Aluminum DS, Steeda LCA's, Steeda UCA
FRPP 3.73 Gears, IMCO Extreme Axle Back Exhaust
255/50/17 Tires BFG GForce T/A KWDS
WRT this mod, the bottom line for me is that it has noticeably improved my car's performance during stop-and-go driving(90% of my driving mileage) in hot weather by allowing the engine to suck in a larger volume of cooler outside air and a smaller volume of hotter underhood air, and that it has not caused any problems in the process.
by allowing the engine to suck in a larger volume of cooler outside air and a smaller volume of hotter underhood air, and that it has not caused any problems in the process.
No matter how you word it you don’t have the information to back up any of those claims.
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Under Construction. Better, Stronger, Faster than it was before.
No matter how you word it you don’t have the information to back up any of those claims.
My original post has the all of the data you should need for the 1st claim, and my word is all that you'll get for the 2nd claim.
However, since you have not believed anything that I've stated, I'm not going to waste any more of my time responding to your posts in this thread.
My original post has the all of the data you should need for the 1st claim, and my word is all that you'll get for the 2nd claim.
However, since you have not believed anything that I've stated, I'm not going to waste any more of my time responding to your posts in this thread.
If you put a duck in water does it not float? If I put the witch in the water does she not float? So therefore she is a duck.
Ah, I see you are a man of science.
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Under Construction. Better, Stronger, Faster than it was before.
hey thanks ski i might try this.its not like your holding a gun to his head and making him do this to his car just passing along some info from your experience.he is the same one that always trying to make me look stupid because i somtimes ok most of the time am not a great speller or typer.but little does he now at the other end of this computer is a multi multi millionaire and somtimes i dont have time to re read my post i have a large trucking company to run.but the main thing is he can type and spell wow.and he does know a lot about these mustang and has a lot of good info just like you do ski.
