Does The Mk3 St Lose Power While Hot

[Slupanter]

Hi guys,

Does the new ST lose BHP when it gets hot or is this a lie?

AS are saying the ST drops to 216BHP at 85 degrees

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[Stoney871]

Mine hasn't yet after 17000 miles on the clock.

[Slupanter]

So it's a lie to get you to buy their remap kit?

Thanks for the reply

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[Dee_82]

Thought most cars lost power when hot, isn't that what the intercoolers there to help with? I know on really hot days I can feel a difference.

my mk2 warmed up is much more punchy on a cool day than a hot one, come to think about it even F1 cars dont like the heat, or have I completely missed the point?

[jeebowhite]

Not wrong at all. Colder air in combustion leads to bigger expansion at combustion. That's why you're getting more from it when colder.

[Slupanter]

So will a heat shielded induction set and larger inter cooler help?

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[Dee_82]

More air in is good but not if that air is warm or full of crap because of a crap filter.

apparently painting the intercooler black will help it when your at a standstill like at a junction or traffic lights, pretty cool stuff when you think about

as for bigger, others will know better but I don't think bigger is always better, that air is needed and needs to be cool, its a balance, bigger may mean cooler but slower, smaller may been less restriction but warmer.

[Slupanter]

I've got the AS induction kit, Air-tech stage 3 intercooler.

http://www.autospecialists.co.uk/AS-Performance-Induction-kit-with-KN-filter---fits-ST250--Zetec-S-16-Eco-Boost-Product-1129.html

http://www.autospecialists.co.uk/Focus-ST250-Stage-3-Airtec-Intercooler-upgrade-with-full-depth-WRC-style-Air-Scoop-surround---Pro-Series-Black-Product-1128.html

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[troy45]

As above, all engines lose power as they get hotter, then on cars like the ST (assuming it follows the mapping of the ST225) it'll be monitoring the intake air temperatures (air into the inlet manifold) and if these exceed set limits then the ECU backs off ignition timing and goes a lot richer on the fuel/air mixture to try and cool things down.

This will obviously reduce power as well. This was a bit of an issue sometimes even with standard ST225's when they first came out and Ford uprated the intercooler to improve things. Same for when people run some higher power remaps with the standard intercooler still fitted.

I'd expect that any benefits in improving air induction efficiency alone won't have much benefit for intake temperatures temperatures as these will be cancelled out by the heating effect the turbo causes, intercooler does much more in this area. Great excuse to fit a nice smart intercooler like the AS jobbie :)

[Slupanter]

So you approve of the kit :)

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[Andy.B1971]

You only need to look at the Mountune upgrade packages mp260,mp350 etc, they use bigger intercooler, modified standard airbox with high flow filter, injectors, remap etc, I am sure that if mountune thought induction kits were beneficial then they would include them in their packages, so 350 bhp with modified standard air box proves it has high enough flow rate for cold air cant be too bad really....unless you really want the boy racer sound........

[Slupanter]

The AS 285 pack suits me ATM. I know my talent limit hehe, I think I'll run out of talent before I run out of power. I've put the money aside for the new RS as it look so sexy

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[Andy.B1971]

I feel a few track days coming on for you lol,....oh and a pair of front tyres lol

I like this company

http://www.j-w-racing.co.uk/

If you want cooler there is always aqua mist or the like....

..