VegasFD

I've been driving my car for over a year now, and living in Las Vegas, especially in our hot *** summer heat, I've seen my heat soak temps up to about 108C. But tonight, I parked in my girlfriend's garage for about 5 minutes and when I turned the car back on my PFC read 118C!!!

Just out of curiousity, I'm wondering what's the hottest other FD owners' heat soak temps have peaked at in other types of climates?

PS: Sorry If this a repost.

tom94RX-7

iTrader: (5)

Wow that's alot. I assume you did the fan mod so your fans run for 10 minutes when you shut off the car, if you didn't this helps to cool it off and reduce heat soak some. I relocated my IAT sensor to the FMIC outlet pipe so it is usually below like 40C I think on the hot days in PA (80-90F)

VegasFD

I barely drive my FD. It's in modification-mode most of the time. The fan mod and relocating the IAT sensor are the next two things on my list.

Jack

iTrader: (2)

129C with Evans Coolant, Watkins Glen 7/4/02 90-95 ambient...However this is while on the track.

Howard Coleman

iTrader: (6)

i designed and installed aluminum louvers for my hood last summer. i instrumented underhood as to temps and found the following:

after shutoff the engine compartment temp soars.

taking my temps realtime in front of the throttle body w the probe in the spot furthest from any metal object i found 87F at 60 mph on a 78F ambient day.

after engine shutoff w a non-louvered hood the temp was 194F in 4 minutes.
w the louvered hood it was 156F

after 20 minutes non louvered hood 158F and louvered was 128F

any time you can, open your hood at shutdown.

louvered hoods do not lower underhood temps while driving. they merely allow more heat to be exhausted thru the heat exchangers which is a good thing.

howard coleman

burnoutking999

so far im stock but plan a v mount soon. my car seems REAL hot so on a freinds(redr1) advice i decided to pop the hood(stock) as i pull a few yards from the driveway and then let it sit for a minute running before shutoff. all this with not having boost the last 2 miles/3-5 minutes away from the stop.

my underhood temps FEEL drastically different then if i just let it cool naturally. the popping of the hood draws every bit of heat out of the air in the compartment and then cools thing fast. as far as heat soaked temps i have yet to take a measurement but the stagnant air is cool and usually i can touch things and it feels normal not OMG its hot.

its a half mile from the entrance of the neighborhood to my house and i just pop the hood on the 1/4mi-3/16mi straight and it makes a HUGE difference to how long it takes to cool.

twin7r1

iTrader: (1)

So you pop the hood from inside the car while its still moving? ofcourse not very fast but still moving?

VegasFD

Howard, that's very thorough and interesting info. Are you still running the louvered hood? I open my hood after shutdown every chance I get, but unfortunely I can only really do it when I'm parked at my house.

burnoutking999

yes, for obvious reasons not very fast but like anything first or second gear cruising, 10-20 mph? just enought to get flow through without stressing the hood etc. the latch will hold and its not bad unless you did it at higher speeds.

it really does do a great job of drastically reducing temp and heatsoak so much. im getting a v-mount and scoot style hood so i will be a lot better then but this is a good way every now and then after a long/harder(boost) ride to speed up the cooloing down part. i still let it idle a minute or two to circulate fluids and further extract the heat but its not just circulating the same hot fluid when the bay isnt heat drenched.

JConn2299

Excellent advice. I'm an original owner and have been doing this since I bought the car. People who have looked in my engine bay are amazed at what great condition the hoses are in. Even my turbo coolant hoses are still in great shape.

It's amazing the heat this car generates. It just sits there and bakes. I have a thermometer in my garage about 10 feet away from the FD. Even with the garage door open, the temp in the garage will rise 5 to 10 degrees after I park the car. An hour or two later the alternator is still too hot to touch.

I've done the popped hood while moving thing a couple of times. I'm not sure it helps that much. I also don't like to idle too long. It can raise the temp and kick the fans on to a higher speed. Usually, I don't let the cool down idle go much longer than 30 sec. Often I'll coast part of the way the last half mile or so to the house...let things cool down a bit. If it's a hot day I'll turn the interior fan to 4 to get the radiator fans going, then open the hood in the garage. It works for me.

1QWIK7

iTrader: (33)

Agreed

I remember when i had my SMIC and i would go hang out with friends, ill be the only one opening my hood whenever we parked for anything. I would get made fun of cause of that. They are like why do you have to do that all the time? But now its not that bad with my FMIC unless i boosted and its really hot outside.

dradon03

iTrader: (2)

Maybe it was just me but when I took out the stock stuff and went with a SMIC the engine compartment was MUCH hotter like really crazy hot. Maybe it was just all the plastic that was soakuing everything up. regardless I open my hood when I get home and leave it open until temps are normal.. Usually I will also run fans for 5-10 minutes.

VegasFD

I think there may be some truth to this. For instance, I've replaced my stock plastic: intake, intercooler, and intercooler piping from y-pipe all the way to the TB with metal versions of each. All that metal has to holding more heat.

DrunkenBowler

My heat soak temps get around 105C in the hottest of days.

Section8

iTrader: (6)

The hottest i've seen (pre fluidyne rad and PFC for monitoring) on my analog water temp gauge was about 212F, that was mainly because i forgot to flip the switch to my fans.

Since i got the PFC, i haven't seen anything over 95C

LUPE

280 F on my last motor......

RX7Wishing

LUPE

Yeah, I was on my way home from work and I had been overcomed by diarrhea. I refused to crap my pants so I just kept driving.

The motor held together just fine

dradon03

iTrader: (2)

I think so for sure because when I turn my fans on then the hoat air really rises and I think of when there was the plastic cover how much damn heat must have been trapped down there.....

I wonder if designing a radiator cooling plate would be of any use on our cars....

VegasFD

Glad to hear our motors can withstand that kind of heat. I do however hope I never have to deal with your type of situation- engine temps among other things

RaPtOr-T

I always pop my hood, If im at work I set the A/C on and set the TT to 8 minutes for a closed hood cool down. I've forgot to pop my hood one day, came out 5 minutes later to see the PFC @ 111C! Popped hood turned ignition fans came on turned A/C to speed them up! My PFC hasnt seen a datalogit so my fans are still comming on @ 94C. I would recommend a TT and popping your hood to any FD owner, if you dont believe cooling your turbos atleast use it to keep the fans running while you walk away.