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Under boost / Over Boost
http://www.gt4dc.co.uk/forum/viewtopic.php?f=13&t=1001		 Page 1 of 1
Author:  Insanity-74 [ Thu Jun 01, 2006 10:05 am ]
Post subject:  Under boost / Over Boost
Why is it that when the weather is hot my car overboosts by .03 bar and when its cool it underboosts by about the same????????

Being controlled by an Apexi AVCR set up, I presume correctly, by Thor????
Author:  two_OH_five [ Thu Jun 01, 2006 10:33 am ]
Post subject: 
Hmm, that's unusual in that it's the wrong way round compared to "normal"

Generally overboost is more common under cold conditions and underboost in warmer climes

Given the miniscule variation it might just be one of those things.

You could try a pressure and leak test on the actuator just in case the diaphragm has a small hole which is temperature sensitive

Pump up the actuator with a pump and gauge. It should open circa 0.6 bar and it should remain open until you release the pressure
If it slowly closes then you have a small leak
Author:  Insanity-74 [ Thu Jun 01, 2006 1:01 pm ]
Post subject: 
OK. will check the actuator...thanks :)

which leads me on nicely to my next question.....If I buy an upgraded actuator, will I need to adjust the boost controller to suit???? ie change the duty cycle or whatever I need to change????
Author:  Diceman [ Thu Jun 01, 2006 1:06 pm ]
Post subject: 
yes :-) it will require changing.
Author:  peterp1per [ Thu Jun 01, 2006 2:51 pm ]
Post subject: 
i've got a used and in pefect working order forge actuator for sale, already mounted to the ct tubby bracket :D
Author:  Insanity-74 [ Sat Jun 03, 2006 9:31 pm ]
Post subject: 
peterp1per wrote:
i've got a used and in pefect working order forge actuator for sale, already mounted to the ct tubby bracket :D


How much?
Author:  peterp1per [ Sun Jun 04, 2006 3:59 pm ]
Post subject: 
was looking for offers around the 50 mark.
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