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Model specific boards => Golf mk2 => Topic started by: VWnut on 04 August 2003, 07:20

Title: Summer temperature = poor performance
Post by: VWnut on 04 August 2003, 07:20

Hi chaps,
Is anybody elses car suffering performance losses form the heat.
My 16v seems to die off at 5500rpm when the outside temperature is hot. I fitted a ram pipe directly into the air box and mounted it on the front bumper to force cold air into the air intake. This has not made any difference at all. However, first thing in the morning or last thing at night, when the outside temperature is cooler, the car pulls so hard through the rev range to 7200rpm.
Is anybody else experiencing the same or has any ideas on how to combat this?
Tom

Title: Re:Summer temperature = poor performance
Post by: Mk3 16v Anniversary on 04 August 2003, 12:30

Ask you boss if you can swap shifts!

Title: Re:Summer temperature = poor performance
Post by: karmakanix on 04 August 2003, 13:22

Its all about volumetric efficiency, the opposite is that equally frustrating situation when it is a foggy peasouper and your car feels like you've dropped in nitrous yet you cant see past the washer jets.

not sure if it is easily curable, apart from getting the coolest airflow possible. There are various ways of faking cool air (nitrous, intercoolers, water injection (the latter 2 for turbo's), iced manifolds (for dragracers)) these all play with VE in some way.

I'm with Mk3, change jobs or move north...

Title: Re:Summer temperature = poor performance
Post by: adyh on 05 August 2003, 10:47

*nods* it does sound that way , are you sure your not running rich ?

Title: Re:Summer temperature = poor performance
Post by: VWnut on 07 August 2003, 07:07

The mileage is 90k. The injectors were replaced last year. I'm pretty sure it's not running rich, although i can't be certain.
The car only loses power at full throttle at 5000rpm onwards, if i back off the gas a little bit the car picks up again. I was told that it could be fuel pressure?

Title: Re:Summer temperature = poor performance
Post by: VWnut on 08 August 2003, 14:37

Cheers mate, i will give that a go. I'll let you know how i get on.