Why do MCSs feel so wierd to drive when cold?

[MINI-Morgan]

Quote: Originally Posted by Ant FR (original)

get the scanguage, its worth it. the other night it was so cold my intake temps went down to 12c i was only poodling.

Got to love cold nights.....10C intake temps and the S turns into a right little monster.....

[Nath316]

Quote: Originally Posted by MINI-Morgan (original)

Got to love cold nights.....10C intake temps and the S turns into a right little monster.....

You are not wrong there! hehe

Basic rules

more air = more fuel = MORE POWER

Cold air is more compressed so MAF puts more fuel in so WAHEYYYYYYYYYY

Is why we use cold air intakes etc

[Cooooooperslad]

Though a cold air intake dosnt add much power?

[Nath316]

on its own no but add all the other bits n pieces and there is a power increase

waits for laughter

[Bhozar]

Quote: Originally Posted by Cooooooperslad (original)

Though a cold air intake dosnt add much power?

Makes more of a difference what you have upgraded the rest of the engines breathing, such as an exhaust manifold, head work or both.

[MINI-Morgan]

Quote: Originally Posted by Nath316 (original)

You are not wrong there! hehe

Basic rules

more air = more fuel = MORE POWER

Cold air is more compressed so MAF puts more fuel in so WAHEYYYYYYYYYY

Is why we use cold air intakes etc

And the biggest differences are seen on force induction cars due to lower intercooler temps too... colder air in and colder intercooler = less charge temp and so higher air density.

Have to say I really noticed the difference on a modifed S though where the charge temps need far more cooling.

[MINI-Morgan]

Quote: Originally Posted by Cooooooperslad (original)

Though a cold air intake dosnt add much power?

I would say it doesnt cause such a drop off of power due to heat soak in the engine bay. Amazing how quick the temps change when you stop with a hot engine and red hot manifold..

[Richard Crofts]

If you ever log any data on the S you'd be supprised at how much effect the forward speed really does have on inlet temps and boost 5th and 6th in WOT at the right speed can produce more boost than lower gears

[Nath316]

I have observed this with in gear acceleration and it is very good

[MINI-Morgan]

Interesting.... I never thought to even look! I only ever logged acceleration between set speeds in a single gear.

[Alex5]

Quote: Originally Posted by Ant FR (original)

Wha hey, someone got it right.

Yes you can indeed rev the engine to let it warm up quicker. In fact that is exactly what race cars and F1 cars do. Now when i say rev i don't mean sit there blipping the throttle. I mean holding at a continuous higher rev, eg 2000-2500 rpm. The problem only comes when you put load on the engine. Simply running at higher revs will not cause any damage.

Ant, were you referring to my fast-idle warm up habit () there? If it's not bad for the car I will continue to do that, and as the frosty mornings begin it is kind of necessary to warm the car a bit to get the windscreen thawed. As others have mentioned, it's the labouring of the engine bit I have always tried to avoid, hence why I start the car like that. Mind you, since the Janspeed manifold went on I don't think the neighbours are too impressed with me going through my routine at 5.30am when I have to work earlies! And my Milltek catback was so nice and reserved-sounding before