Overheating!!! Argghhh!! Overheating!!!!!!

[JohnzyST]

That must have been an upgrade after June 2014...when I was there. I could totally see it

That's what I was told. That They all had hydronic hand brakes and a larger radiator with a different crash beam to fit it. I personally have never gone. So if it wasnt before then It probably isn't. Lol

Well I for one think it's stupid that a new car over heats but my 91 pos can do 15 hot laps and never over heat. Smh

 

[Rhinopolis]

OP - I live near Manvel and about 15 minutes from MSRH. I too want to do track days in my new FIST at that track, and am waiting until Oct when the temps start going down. I have yet to go in to limp mode on the street, and my hope is that the aftermarket bolt on radiator / oil cooler will be available before my 1st track run.

I have the Cobb intake plus FMIC kit with a 93 octane tune by Randy@mountune. My charge temps with aggressive driving mid day 90 F + outside ambient temps, usually hover 5 to 10 degrees above ambient. I was worried about summer heat/humidity and swapped out the 0w-20 factory oil early this past May for some 0w-30. Oil temps on full boost extended runs usually peak at 212F according to my AP, and I typically max out coolant temps around 198F. My car is not my DD, and I just drive it for fun.

 

[iso100]

I was worried about summer heat/humidity and swapped out the 0w-20 factory oil early this past May for some 0w-30. Oil temps on full boost extended runs usually peak at 212F according to my AP, and I typically max out coolant temps around 198F. My car is not my DD, and I just drive it for fun.

The ST supplement calls for 5W20 not 0W20.

 

[Sourskittle]

I think a lot of this overheating is due to the "give/take" between funneling air into the rad vs around the car. If they funnel more air into the radiator, your going to loss fuel economy. If they funnel more air AROUND the front end instead of into it, they reduce rad cooling, but add fuel mileage. We all know which ford and most people care about more, the all out track performance or MPG. At least we'll have a solution soon, FINALLY. Bigger rad also equals more money and a heavier weight on the front end, not saying I personally wouldn't pefer something I don't have to mod/replace.

Even a stock srt4's will over heat after enough laps in the florida heat...

 

[Rhinopolis]

The ST supplement calls for 5W20 not 0W20.

Brainfart and I knew that..lol. Thanks for correcting

 

[BoostBumps]

Appears the OEM radiator fan's duty cycle is setup with "economy" as a priority rather than for extended track use...which should be of no surprise...

Would bringing up the fan speed earlier help extend or even prevent overheating from occurring for those that occasionally track their FiST's?

[HR][/HR]
Fan Speed DC (Engine Coolant Temp)

This is the base fan speed duty cycle table. Additional compensations can be applied to raise or lower these values.

Tuning Tips - The OEM values are meant for economy, bringing the DC in earlier will aid in consistent power delivery.



[HR][/HR]
Desired ECT

This value is subtracted from the current ECT to create a delta for use in the Fan Speed DC Adder (Desired ECT Delta) table.

Tuning Tips - Lowering this value can create a higher delta and bring additional fan duty cycle in earlier.

 

[b5rks]

I over heated my car in 4.5 minutes in a video on my youtube channel. It was like 74 degrees out at night. But... The tune was pretty stiff.

Can you link your video please?

 

[BeansNCornbread]

I'd want heavy oil for that kind of duty.
As far as the octane cars, I want to say someone asked those guys and they run mostly distilled water and water wetter.

The cobb tune really shouldn't make it run hotter. Its a safe tune as is, and while it does stop the "over boost" from cutting off, that only comes into play on 120+ mph straight aways.

Agreed. Now if we can get the ecu on board.

 

[BeansNCornbread]

OP - I live near Manvel and about 15 minutes from MSRH. I too want to do track days in my new FIST at that track, and am waiting until Oct when the temps start going down. I have yet to go in to limp mode on the street, and my hope is that the aftermarket bolt on radiator / oil cooler will be available before my 1st track run.

I have the Cobb intake plus FMIC kit with a 93 octane tune by Randy@mountune. My charge temps with aggressive driving mid day 90 F + outside ambient temps, usually hover 5 to 10 degrees above ambient. I was worried about summer heat/humidity and swapped out the 0w-20 factory oil early this past May for some 0w-30. Oil temps on full boost extended runs usually peak at 212F according to my AP, and I typically max out coolant temps around 198F. My car is not my DD, and I just drive it for fun.

Track use is MUCH different than spirited driving. OP appears to be able to push the car.

 

[BeansNCornbread]

I'd be leaning toward either a bigger radiator to help take the load up from oil cooling or an air to oil cool and bypass off the water to oil cooler. The AP/MTune may not know the difference unless we actually have a direct oil temp sensor v an algorithm with the latter being most likely since we have a variable displacement oil pump.

 

[WhiteFords]

Since more of us are tracking the cars and seeing a need for a true performance radiator, I wonder if we can regenerate some interest in the custom radiators that 2J had prototyped months back? I seem to remember a lack of interest at the price point. I have no issue paying a bit more for a quality US manufactured radiator.

Retail cost is almost always driven by batch size. With more interest, maybe 2J could put some into production.

 

[BoostBumps]

Since more of us are tracking the cars and seeing a need for a true performance radiator, I wonder if we can regenerate some interest in the custom radiators...I have no issue paying a bit more for a quality US manufactured radiator. ...

Mishimoto's Fiesta ST Radiator R&D...

http://www.fiestastforum.com/forum/...-Cool!-Mishimoto-s-Fiesta-ST-Radiator-R-amp-D!


Mishimoto Ford Fiesta ST Radiator 3D Model

 

[BeansNCornbread]

Mishimoto's Fiesta ST Radiator R&D...

http://www.fiestastforum.com/forum/...-Cool!-Mishimoto-s-Fiesta-ST-Radiator-R-amp-D!

View attachment 5579
Mishimoto Ford Fiesta ST Radiator 3D Model

Good enough with their reputation. Should be all that's necessary. I have them on my rotary and run too cool sometimes.

 

[WhiteFords]

I'm hesitant to buy an offshore part. Mishimoto's reliability is all over the map, based upon my internet searches, but so is Fluidyne, which is an American-manufactured brand, so who knows. If Mishimoto is the only one to get in the game, might have to try one.

 

[haste]

Tracked my '15 FiST at VIR full in 83f weather with stock tune and never had an overheating problem. I got 10.3mpg if that helps tell you how much I was pushing it.

 

[BostonDriver]

I just finished a trackday at Thompson speedway in CT. Air temp was around 80 and after being out for several hard laps I got the coolant warning light. This was on a Mountune stage 3 FiST with custom tune so with power increase comes added heat. The stock cooling system just can't keep up so I'm eagerly awaiting the mishimoto radiator and oil cooler!!!

 

[maestromaestro]

Overheating - insights from Octane Academy

The Fost overheats when tracked, the guys at miller/octane academy upgrade their radiators. i would take a guess the track is small your car isnt getting adequate airflow thus the over heating. The solution get a bigger radiator and take a few cool down laps in between the hot laps.

Ford may have intended for these to be tracked a bit but they didnt intend it to be on a 90+ day with low airflow on a car that has been altered. Another upgrade is a water spray system for the FMIC/Radiator they help a ton with cooling.

Also this talk about intake temps and tune sounds like poppy cock to me. Unless your car is very modified I dont see how these conservative tunes with a stock turbo and bolt ons like exhaust/intake are going to cause this much over heating sure things will get hotter (power=heat) but there is more too it than that

Just got back from the Octane academy (a blast!!!!). They are tracking mostly (mostly) stock cars, but with a few upgrades. However, their mechanic told me that OA was not allowed to use after-market intercoolers, so their's are fabricated out of necessity. However, they drilled out the grille to increase the airflow (something that is described in the RAAMaudio's thread - that IS a lot of work (see a picture he posted:http://s384.photobucket.com/user/raamaudio/media/DSCN4772_zpsx7hxsyno.jpg.html?sort=3&o=12. I was also told (as noted elsewhere) that they use DI water with water-wetter additive instead of the "standard" coolant.

And - I did manage to overheat a FiST on my lapping (took probably good 6 laps though). So - with mods (and no tune, obviously) - still overheated...

The brakes are another story - they got mushy (on mine) pretty quickly too. Octane Academy uses Castrol SRF brake fluid and "some" Carbotech pads (their mechanic told me that he doesn't really know what they are, because, as he put it - "they give me stuff and I work with it". He did suggest to fashion some ducting to cool those as well (need to find a write-up on what can be done; some discussion here: http://www.fiestast.org/forum/fiesta-st-discussions/2871-endurance-brake-setup.html

 

[maestromaestro]

I just finished a trackday at Thompson speedway in CT. Air temp was around 80 and after being out for several hard laps I got the coolant warning light. This was on a Mountune stage 3 FiST with custom tune so with power increase comes added heat. The stock cooling system just can't keep up so I'm eagerly awaiting the mishimoto radiator and oil cooler!!!

Well, I DO have a Cobb FMIC (Mishimoto's should deliver a bit cooler air); which oil cooler did you get? Don't know much about those...

 

[maestromaestro]

I'd want heavy oil for that kind of duty.
As far as the octane cars, I want to say someone asked those guys and they run mostly distilled water and water wetter.

The cobb tune really shouldn't make it run hotter. Its a safe tune as is, and while it does stop the "over boost" from cutting off, that only comes into play on 120+ mph straight aways.

See my post regarding OA - straight from the horse's mouth!

 

[maestromaestro]

I happen to have recorded a few laps - but, I don't have any gauge overlays, so not sure what you may want to see? Wasn't using the AP either (see an earlier post).