CAI vs IAT results

[Lonmon]

Installed the JLT on mine a couple days ago. I have noticed the same as everyone else I would assume. Temps 20-50* over ambient in traffic on a 80* day (stock would be 10-30 maybe). Temps 5-10* over ambient (similar to stock intake) when moving, especially above 40mph. Not sure how much affect on performance it has from a dig when heated up but it does make me wonder if the extra air flow is negated by the extra intake temp. It took a good 5 minutes at speed to get the temps to drop from 136* to below 100* after being in a drive thru. I can see how on a dyno or at the track it would make impressive gains since they are controlled environments, still very curious about "real world applications" with higher temp vs air flow improvements. I still believe it makes more power, but how much more in real world conditions. Not with the hood up after cool down time and a fan on it. Hmmm.

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[2015 Silver GT]

More airflow (debateable here) doesn't always mean more power. Common misconception.

And at the track it's going to hurt more than help while you're sitting in the staging lanes.

 

[Lonmon]

More airflow (debateable here) doesn't always mean more power. Common misconception.

And at the track it's going to hurt more than help while you're sitting in the staging lanes.

Not sure how this is helpful. More airflow (what makes the JLT make more power then stock airbox, proven), doesn't always mean more power (ok, because there are some situations where this is true doesn't mean I am misconceiving anything). Cooling off in the staging lanes is a disadvantage? Sure heat soaking is way better for your ET's. Sure if you end up with a cold engine, thats not good but you can always warm a motor up quickly, it takes time to cool one off. It just seems like sometimes people just look for a way to pick apart someones attempt at helpful info to try and show how smart they are.:shrug:

 

[2015 Silver GT]

The JLT makes more power than the stock air box? I doubt that very much with iat's through the roof.

 

[Tele5.0]

I quit.....

 

[Lonmon]

The JLT makes more power than the stock air box? I doubt that very much with iat's through the roof.

Multiple people, some on this forum have shared before an after dyno sheets showing the gains from they're JLT CAI. I will do the same when I re-dyno my car this weekend. The only change I have made is the intake from stock airbox and the necessary canned sct tune for the JLT. Has anybody even shared what the computers strategy is for timing retard based on intake air temps? How do we know that 20* difference at initial throttle input (air intakes drop quickly with hard acceleration with the JLT once moving) amount to a noticeable power loss. I don't feel any loss of power from the JLT when the intake temps are higher. I just want to know if anyone has been able to measure or figure it out. You seem to act like its fact that the extra air flow is worthless and the extra intake air temp in traffic causes noticeable power loss with no basis of fact. We need to know how much the computer pulls back the timing and or how much the density of the air is affected by this "thru the roof" increase in air temp to speak factually. There is certainly more proof available from dyno and track times to infer that the JLT ultimately helps more then it hurts but I still wonder about everyday driving situations. I.E. going light to light with someone after sitting in traffic for a while.:cheers:

 

[2015 Silver GT]

I could give two squirts about a dyno sheet. They're about as flimsy as the paper they're printed on.

My 2011 ran a best of 11.2 N/A with the stock airbox. In better D/A the best I could get out of the JLT was an 11.5. I would sit there just waiting to get to the burnout box watching my iat's sky rocket. That was proof enough to sell it and go back to the stock box.

 

[dubster99]

All you have to do is plug in your SCT and run a datalog with the stock airbox, and compare it to a datalog with the JLT. Look at MAF rate in lb/hr and see the difference.

 

[Joe_Stang]

I could give two squirts about a dyno sheet. They're about as flimsy as the paper they're printed on.

My 2011 ran a best of 11.2 N/A with the stock airbox. In better D/A the best I could get out of the JLT was an 11.5. I would sit there just waiting to get to the burnout box watching my iat's sky rocket. That was proof enough to sell it and go back to the stock box.

For the price of an aftermarket intake the power improvement if any isn't worth it to me although on previous cars the iat stayed at a lower temperature then the stock box but still doesnt justify the price which is why I've opted to do a drop in filter on my ecoboost.

 

[Lonmon]

Just got back from the dyno. Same dyno as last week. Temp was 89* today (last week was 85*). Only thing I changed was the stock air box, K&N panel filter and airaid intake tube for a JLT CAI and switched the sct x4 stock box tune for the JLT canned tune. I have noticed higher IAT in traffic but despite that it made 415whp and 378wtq compared to last weeks 391whp 369wtq in 4* cooler weather. I am very happy with the results, sound, and feel on the road. I ran beside my friends 1le which is now making 426whp 411wtq in traffic (intake air temps starting around 134*) and could hang with in a car length of him through 4th gear. He has kooks LT and exhaust but stock air box still. Just some info for those interested. These are MY results.

 

[to_the_darkside]

So for everyone that is experiencing high IAT's with the JLT as I was, I will say that I did a grill delete mod on my car and holy crap what a difference that made. That little triangle of honeycomb blocks soooo much air from coming in through the front tube that its ridiculous! My average has gone down to about 7 above ambient and the highest being about 30 degrees above ambient. Best I've seen since the grill delete is 4 degrees above ambient. It takes A LOT longer to heatsoak and cools very quickly. Even if you dont want to do a full delete I would recommend opening up that little triangle any way you can. Its a night and day difference in the temps you'll see with the JLT intake for sure.

 

[Silver50Pony]

I'll throw this in here see if anyone has any ideas. I have a steeda intake and my IATs while cruising stayed about 5-6 degrees above ambient. I just loaded a Lund tune and now I can't get closer than 10-12 degrees above ambient. Now my fans are running like crazy so my current guess it's drawing hot air to my intake but just curious if anyone else noticed similar things. Thanks.

Same issue here man, not sure if the fans running like crazy are helping anything. My cylinder head temp never goes above 208 but the iats are way higher then before

 

[madweazl]

Same issue here man, not sure if the fans running like crazy are helping anything. My cylinder head temp never goes above 208 but the iats are way higher then before

Hmm, this is interesting.

 

[madsedan]

I noticed the fans running crazy as well after the Lund tune with JLT intake. I am going to use a 3/8" or 1/2" bit to put large holes in the solid honeycomb flats directly in front of the grill intake tube.

 

[ConspicuousConsumption]

for what it's worth...

Roush CAI
Air temp = 75°
Idle temp 5 minutes = 158°
40mph cruise temp = 90°
Driver nervousness = 100%

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