Some observations fighting IAT's with JLT CAI

Discussion in 'V8 5.0L Engine / Mods: Bolt-ons, Exhaust, Tuning' started by pgonza2723, Jul 12, 2019.

  1. Zelek

    Zelek Well-Known Member

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    You should try the Reische 170 thermostat if you haven't already. The fan profile can be set around it. Lund actually preferred it when I got my first tune a long time ago.
     
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  2. BlownGP

    BlownGP Well-Known Member

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    Umm, I have plenty of left over. Guess I can cut a small piece and make it sit in that spot.
     
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  3. 2018GT

    2018GT Member

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    I just put some DEI gold tape on the bottom of my stock 2018 air box. I 'wrapped' the bottom, the side(toward the radiator/engine), and the back with it. I did not put any on the top of it.. didn't have enough and figured that heat rises so didn't think it would make that much of a difference..(putting it on the top). I also like the fact that you cannot really see the tape with it on the bottom/side/back.

    I drove it for about 20 mins with some red lights and a couple miles on the interstate. It looks to be about 5-7 degrees colder(conservatively) than what it was (for the little I drove it). At a steady state it seems to be giving about 6 degrees colder, and seem to be a little slower to move up at a red light.

    FYI: for some reason my car before was running 14-17 degrees warmer at a 'steady state' of speed(much higher than what many of you are seeing with your cars it seems). Today it was 82-84 degrees and it was running 90-91 degrees at a steady state of speed.
     
  4. OP
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    pgonza2723

    pgonza2723 Well-Known Member

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    So just finished a track day at COTA. Outside temps were 98-100* with track temps in the 115*+. Sitting on the grid for 10 minutes in that heat IATs sat 128-130*. Not bad IMO. As it stands right now, it looks to be fairly effective at keeping temps at bay and happy with the results.
     
  5. OneFordGT

    OneFordGT Well-Known Member

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    Nice find, I also have some left over and I'm going to get that sealed asap. Thanks!
     
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  6. Zelek

    Zelek Well-Known Member

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    I wanted to do that track day but I don't feel like I'm "ready" for it yet. I bet it was a blast.

    The fans can also lower the IAT's as well when idling. I've seen that happen before when I was in a drive thru with mine. Unexpected benefit.
     
  7. OP
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    pgonza2723

    pgonza2723 Well-Known Member

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    At this point I would say there would be no reason to worry about being ready or not. There's a whole range of skill levels out there, but the biggest thing is to just get out there period and gain the experience. Every car has an instructor (till you get solo qualified), and safety is their main priority. My first track day was at MSR-Houston with Driven Blessed group and they were the same way. Reason I've been more keen on the Edge Addicts group is because COTA is local so makes it easy. There's an even coming up Oct. 20th at COTA I would say go for it. That's my next event.
     
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  8. Genxer

    Genxer Well-Known Member

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    Remember that with an open element air filter, you want to make sure to allow free flow of air coming in all around it. So it isn't a matter of closing everything off, it is also about making sure there is enough surface area in the box that is open for air to flow in without restriction. That piece of foam on top of the tube is probably the low hanging fruit in regard to keeping heat out. You should see a definite decrease in IAT with just doing that. I am skeptical of doing a wrap on the intake tube, since air is constantly moving through there and not sitting around waiting to heat up. It does look kinda cool and NASA-ish. Maybe shielding the MAF would help? I've explained my mods in several other threads if you want to search for details on what I have done and results I've seen.
     
  9. cib24

    cib24 Well-Known Member

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    When are people going to acknowledge that they are better off keeping the stock airbox on the car as a CAI is simply not worth it? Focus on other modifications rather than replacing this singular item.

    Maybe take driving lessons and become a better driver before worrying about a mod that is terribly inefficient in terms of $/hp.
     
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  10. kh1818

    kh1818 Well-Known Member

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    That is probably true if someone simply slaps on a new intake without anything else, however the power pack 2 for 15-17 GT's can be had for about $600 and certainly makes a difference in the car.

    Is it really that bad for our IAT's to approach 160ish when sitting in hot summer traffic? I understand it might result in reduced performance, etc., but is it actually damaging to the engine? I didn't think it was, but please correct me if I'm wrong. I (happily) have the PP2 on my car and would like to know if I should also be making an effort to drop IAT's specifically during the summer work commute, when i can see IAT's near 160 occasionally.

    Thanks
     
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  11. Bluemustang

    Bluemustang Well-Known Member

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    Excellent. That stock 18 intake is pretty darn good.
     
  12. jmeiers

    jmeiers Well-Known Member

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    I recently switched to JLT CAI with the Dry filter option and also noticed the large increase in IAT's when sitting in traffic over my stock 2019 CAI with AEM dry filter. I took a few ideas from this thread and did some testing yesterday and it got my IAT's under control and very close if not the same as the stock setup. I first used the 1/2 rubber piping insulation around the entire top perimeter of the JLT box, including along the box where it meets the fender where there is a large gap. Then I took a piece of Reflectix HVAC duct wrapping and cut it exactly to fill the entire top of the open box and left no open gaps. The only downside so far, its ugly as hell but who cares. I don't sit around with my hood open so nobody knows and its all easily removable/replaceable.

    I think over the winter I am just going to take the JLT box out of the car and make a custom, sealed fit and removable top for it.
     
  13. VooDooDaddy

    VooDooDaddy Banned

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    The elephant in the room, and what prevents peeps from acknowledging the stock airbox is superior when it comes to keeping the air temps down, is the fact that most people buy an aftermarket CAI for how it LOOKS with the hood open. People want the "wow factor" of a dyno-queen CAI when they open the hood. If people made the decision to buy an aftermarket CAI system based on flow and air temps, the aftermarket companies would be out of business in short order.

    Yes, I have the FORD GT350 CAI, but I only have it because I found it on eGay for $100 plus shipping and the fact that it was engineered by a multi-billion dollar company for a high-performance variant of the S550. Had I not found it, I would be rocking a factory stock '18 or '19 GT CAI plus a high-flow filter with a custom tune as I feel that CAI is probably about the best CAI you can find?
     
  14. BmacIL

    BmacIL Enginerd

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    Or Roush '18 box (closed box, w/ 105 mm MAF vs the 2018 at 98 mm)...
     
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  15. Bluemustang

    Bluemustang Well-Known Member

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    Application people. It depends on what CAI you choose as to whether it is right for your application. Also, in my recent testing with 3 different intakes (cp-e, JLT and Roush 18) I have discovered a prime factor in this IAT quest.

    The Roush 18 CAI (closed box) - I can sit there idling and the IAT will barely rise, UNTIL the fans kick on. Then it's a different ball game. Seems to me a pretty good indicator that backwash from radiator is being thrust into the airpath thus making the IAT rise quickly. I sat there and watched the IAT as I slowly let the car heat up - it would barely change. Soon as the fans kick out, sharp rise like a switch. I bet if I had the Velossa Tech Big Mouth which is designed to help prevent this issue, there'd be no more need for any of this talk.

    In fact, with my testing with the JLT, I don't even think the open box makes that much of a difference in the rising IAT and it some cases it may help a little bit if you're getting radiator backwash in there. With a closed box it almost traps that heat. The closed box does make a difference but I think the radiator backwash is more of a factor.

    I have a feeling that a closed box CAI coupled with the Velossa Tech Big Mouth would be a great setup, possibly with IAT lower than stock. If true, it would be unbeatable and put all the negative talk to bed. Still need to test this theory but preliminary feedback from others re: the Velossa Tech makes me think it's a likely result.
     
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