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Insanity-74
 Post subject: Under boost / Over Boost
PostPosted: Thu Jun 01, 2006 10:05 am 
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Group N

Joined: Fri Mar 31, 2006 7:29 am
Posts: 447
Location: Up North
Car Model: ST205
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????
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two_OH_five
 Post subject:
PostPosted: Thu Jun 01, 2006 10:33 am 
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Joined: Thu Jul 14, 2005 12:44 pm
Posts: 4067
Location: drinking devil fuel
Car Model: ST205
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
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Insanity-74
 Post subject:
PostPosted: Thu Jun 01, 2006 1:01 pm 
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Group N

Joined: Fri Mar 31, 2006 7:29 am
Posts: 447
Location: Up North
Car Model: ST205
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????

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Diceman
 Post subject:
PostPosted: Thu Jun 01, 2006 1:06 pm 
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Joined: Wed Jul 13, 2005 6:54 pm
Posts: 3484
Location: On Top
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yes :-) it will require changing.

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peterp1per
 Post subject:
PostPosted: Thu Jun 01, 2006 2:51 pm 
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Junior WRC

Joined: Sat Apr 22, 2006 6:28 pm
Posts: 559
Location: Basingstoke
Car Model: None
i've got a used and in pefect working order forge actuator for sale, already mounted to the ct tubby bracket :D

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Insanity-74
 Post subject:
PostPosted: Sat Jun 03, 2006 9:31 pm 
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Group N

Joined: Fri Mar 31, 2006 7:29 am
Posts: 447
Location: Up North
Car Model: ST205
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?
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peterp1per
 Post subject:
PostPosted: Sun Jun 04, 2006 3:59 pm 
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Junior WRC

Joined: Sat Apr 22, 2006 6:28 pm
Posts: 559
Location: Basingstoke
Car Model: None
was looking for offers around the 50 mark.

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