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Model specific boards => Golf mk5 => Topic started by: Spaced on 30 June 2009, 21:12

Title: Hot Weather performance (or lack of)
Post by: Spaced on 30 June 2009, 21:12
I'm finding above 25 degrees performance and MPG tail off at an alarming rate, I was at the dealers today having my second MOT and a one of the sales guys who is driving a scirocco said his was crap as well. Anyone else finding this?

You can hear the turbo winding up but it just doesn't seem to translate into power.

If this is the case how do you guys in hot countries put up with it? :sick:
Title: Re: Hot Weather performance (or lack of)
Post by: topher on 30 June 2009, 21:14
global warming fella, time for that intercooler upgrade :laugh:
Title: Re: Hot Weather performance (or lack of)
Post by: Hurdy on 01 July 2009, 00:02
A Forge Twintercooler would sort this out for you :wink:
Title: Re: Hot Weather performance (or lack of)
Post by: D-FINE on 01 July 2009, 00:11
 :sad:
Title: Re: Hot Weather performance (or lack of)
Post by: Peskarik on 01 July 2009, 08:57
I'm finding above 25 degrees performance and MPG tail off at an alarming rate, I was at the dealers today having my second MOT and a one of the sales guys who is driving a scirocco said his was crap as well. Anyone else finding this?

You can hear the turbo winding up but it just doesn't seem to translate into power.

If this is the case how do you guys in hot countries put up with it? :sick:

once you tune it it gets even worse.  :smiley:
Before I installed S3 cooler (but already with 300hp map) I could feel the difference in performance when the temperature changed 5 degrees C.  :lipsrsealed:

Now with S3 cooler, sport downpipe and 3-inch exhaust, my MPG in 30 degree weather is better than what I had without these parts in 15 degree weather.  :smiley:
Title: Re: Hot Weather performance (or lack of)
Post by: AlanD on 01 July 2009, 09:43
Iv noticed my midly tuned GTI to be off the pace in this hot weather (its not got as noticeable kick off power as it used to), I thought something was wrong but then just put it down to the stupid temperatures we are getting down south at the moment.

Im glad you made this post actually as its not just me.
Title: Re: Hot Weather performance (or lack of)
Post by: Ryan270286 on 01 July 2009, 14:23
Glad you mentioned this. I've been putting my foot down to find it's a waste. I thought my turbo fell out during an overtake and almost mated with the front end of a truck. Not my idea of a good time!
Title: Re: Hot Weather performance (or lack of)
Post by: RedRobin on 01 July 2009, 22:58
....

I haven't felt any noticeable loss in power at all in this hot weather - Just that everything is hot when I stop. Done a 170-mile run mostly on fast A-roads this afternoon.
Title: Re: Hot Weather performance (or lack of)
Post by: TomB on 01 July 2009, 23:02
Do you guys run your AC all year round?

Mine's bust so its turned off, but performance hasn't been too badly affected.  That said it is running about 150bhp at the minute because the turbo actuators also bust so I might not be noticing it as its already slow.
Title: Re: Hot Weather performance (or lack of)
Post by: winrya on 01 July 2009, 23:20
I can feel the surge of power isnt quite what it is when the weather is cold but its not that noticable
Title: Re: Hot Weather performance (or lack of)
Post by: stealthwolf on 02 July 2009, 00:27
surely the hot weather means the air is less dense, so less oxygen is available for combustion, meaning reduced power?
So you'd have to hit the gas pedal harder to get more acceleration?
Leading to increased mpg?

Best thing to do is cool the incoming air down with an intercooler.

And drive at night!
Title: Re: Hot Weather performance (or lack of)
Post by: RedRobin on 02 July 2009, 09:37

I can feel the surge of power isnt quite what it is when the weather is cold but its not that noticable


....Yes, I'd describe it as there being an extra 'boost' feeling when the outside air is cool and crisp. My bottle is half-full and not half-empty.

:afro:
Title: Re: Hot Weather performance (or lack of)
Post by: Peskarik on 02 July 2009, 09:42
It's 30 degrees here in Zurich. Been 35.  :sick: I am thinking about Forge intercooler install now.

I did not get this with AC. So when it is hot outside it is beneficial to the engine to run AC?
Title: Re: Hot Weather performance (or lack of)
Post by: R32UK on 02 July 2009, 09:55
It's 30 degrees here in Zurich. Been 35.  :sick: I am thinking about Forge intercooler install now.

I did not get this with AC. So when it is hot outside it is beneficial to the engine to run AC?

Its never benificial to have the A/C on
Title: Re: Hot Weather performance (or lack of)
Post by: Peskarik on 02 July 2009, 10:28
It's 30 degrees here in Zurich. Been 35.  :sick: I am thinking about Forge intercooler install now.

I did not get this with AC. So when it is hot outside it is beneficial to the engine to run AC?

Its never benificial to have the A/C on

yes, I understood that now.  :embarassed:
Title: Re: Hot Weather performance (or lack of)
Post by: RedRobin on 02 July 2009, 10:40
surely the hot weather means the air is less dense, so less oxygen is available for combustion, meaning reduced power?
So you'd have to hit the gas pedal harder to get more acceleration?
Leading to increased mpg?

Best thing to do is cool the incoming air down with an intercooler.

And drive at night!

....Absolutely true, but how do you accurately enough measure how much harder you hit the gas pedal when driving? Increased mpg? - Probably, but personally I don't tend to ever study that.

Anyway, I think your increased mpg must be down to extra weight from all the sweetie eating :evil: :evil: :evil: :evil: : -

(http://i197.photobucket.com/albums/aa104/verycherryR32/Shows%20and%20Meets/inters09/111.jpg)

(http://i22.photobucket.com/albums/b308/RedRobin_05/Meets/SantaPod_Stealth.jpg)
Title: Re: Hot Weather performance (or lack of)
Post by: stealthwolf on 02 July 2009, 10:45
You seem to have a stealth picture fetish there old boy!

 :grin: :grin: