Maggie IAT's
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2004-2007 Cadillac CTS-V Performance Mods Discussion, Maggie IAT's in Cadillac CTS-V Series Forum - 2004 - 2007; I just got an aeroforce gauge for Christmas and have been watching my IATs. They seem to build to 50F ...
  1. #1
    2007V is offline Cadillac Owners Member
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    Maggie IAT's

    I just got an aeroforce gauge for Christmas and have been watching my IATs. They seem to build to 50F over ambient even when driving easy and I've seen 140f when under boost for a while. Just seems high. I was wondering if those are typical temps.

    Also when the bypass valve is open does the air still go through the heat exchanger or is that bypassed as well?

    Thanks

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    rand49er's Avatar
    rand49er is offline Cadillac Owners 10000+ Posts
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    Re: Maggie IAT's

    Hopefully, Twitch sees this thread. He's one of the IAT gurus around here. I'm just a bump guru.
    HAMSTAR and HAMSTAR like this.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: Maggie IAT's

    I watch my IATs and they will sit in the 120s during cruising on a warm day. I use meth injection so my IATs actually drop under boost to into the low 100-110 range. I am also running a 2.6 drive pulling so I'm spinning about 9% faster.

    The HEX is down in front of the radiator i think you are speaking about the intercooler which is sandwiched between the SC and the intake manifold. I believe the bypass shoots air down straight into the intake manifold.

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    2007V is offline Cadillac Owners Member
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    Re: Maggie IAT's

    One Fast V, can I ask what size of methanol nozzle are using and did you adjust the tune for it? I have a small nozzle on there now and I believe the same size pulley but I would need to verify that.

    Yeah, sorry intercooler would have been the better term. Basically the IATs are rising even when not in boost so if the air is bypassing the IC as well then I guess it is just heatsoak from the manifold design, well and the intake and engine bay heat as well.

    Thanks!

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    OneFast V is offline Cadillac Owners Enthusiast
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    Re: Maggie IAT's

    Regardless of whether or not the bypass valve is being used, the Maggie is still spinning and generating heat and heating up the intake mainfold etc. The intercooler fluid temperature definitely doesn't run much cooler than the iats.

    I will find the link for the injector I use for meth but its the cooling mist cm3 nozzle.

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    2007V is offline Cadillac Owners Member
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    Re: Maggie IAT's

    That's real similar flow to mine. I just checked and I'm running a the D05 from Devils own, 315cc/min compared to 275cc/min. What is your boost pressure and are you using a controller for the water/meth or just a pressure? Mine just comes on with the the BAP 3psi switch.

    Again thanks for the info. I wonder how much water/meth I can give it before it gets too rich.

  8. #7
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    My IATs are right there as well...

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    RyRidesMotoX is offline Cadillac Owners Enthusiast
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    Have any of you guys expiremented with ethanol? Its not going to help IATs but it will help keep predetonation in check.

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    Re: Maggie IAT's

    Here is what we install....only adds 12# app and no reacuring costs:

    http://www.youtube.com/watch?v=AaQRwNmt7lY

    www.RevXtreme.com
    RX Performance Products/RevXtreme.com 941-721-1826

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    rand49er's Avatar
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    Re: Maggie IAT's

    How does a, say, 50-deg decrease in IAT translate to rwhp on a dyno? Anybody ever get these data?
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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    SC2150's Avatar
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    Re: Maggie IAT's

    At 115* the PCM is pulling 1-2 degrees of timing, only 10 or so hp loss. At 150 5-6* and 20-30 loss, at 185 10 plus and 50-60 plus hp loss.

    The chiller will bring temos consistantly lower so your tuner can be a bit more aggressive safely and we see 20-50 more rwhp depending on the build/boost.
    RX Performance Products/RevXtreme.com 941-721-1826

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    I know my tune is set to pull one degree timing per twenty five degrees of temperature increase... So yea at 180ish I lose around 50-60hp... Sucks

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    DMM
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    Re: Maggie IAT's

    With My Maggie, I was usually running in the 113* range. With the E Force, i'm running between 52* - 67* from what I've been seeing. Highest it got was 140* while I was cruising on the highway (29* ambient) and the system drained through a leaking fitting on the HEX. I was sitting in bumper to bumper traffic the other night on I-95 in Baltimore (accident) and the highest it got was 87*.

    Edit: I thought each degree of timing advance with FI was worth a lot more HP than that...more in the 20-45 HP range. It sure as hell feels like that much.

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    Re: Maggie IAT's

    The video shown is at ambient temps in the high 70's. The RX SuperChiller in 100* ambient air temps cools 30-50* below ambient air temps.

    In the winter with temps in the near or below freezing, the air-water HE will do a great job of keeping IAT temps cool. but no HE can cool to or below ambient air temp.

    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: Maggie IAT's

    Quote Originally Posted by 2007V View Post
    I just got an aeroforce gauge for Christmas and have been watching my IATs. They seem to build to 50F over ambient even when driving easy and I've seen 140f when under boost for a while. Just seems high. I was wondering if those are typical temps.

    Also when the bypass valve is open does the air still go through the heat exchanger or is that bypassed as well?

    Thanks
    I used to see 140* if I was sitting in traffic on a hot day then started getting into boost. Now I'm running meth and changed the thermistor in the IAT sensor (reads temps much faster). Normal driving on a hot day is usually under 120*. I'm in NYC so lots of stop n go.

    Personally I like to use the smaller nozzle (don't ask me what size). This way I can use full pressure to better atomize the Meth.

    I know the search on this site has gotten worse. But if you can find the thread about the "thermistor mod" it might be something your interested in. It basically reads temps faster and give you a better idea of actual temps. If my car is idling with IATs rising, as soon as I bring the RPMs up to 1500, IAT starts to drop 10* in the first few seconds.

    Also: LOVE the interceptor. It gives you so much information.

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