what boost?

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what boost?

Postby steveatyork » Sat Jul 30, 2005 1:15 pm

hi
ive just fitted a boost gauge and plumed it into the vacum pipe that connects to the dumpvalve,my car is totally standard and the gauge is reading 0.7 bar does this boost seem correct
thanks steve
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Postby peterg » Sat Jul 30, 2005 1:24 pm

0.9 is the standard boost level, but you will loose some of the reading via the vacuum pipe....also there are variables like weather conditions and the accuracy of your guage that effect it too.
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Postby steveatyork » Sat Jul 30, 2005 1:31 pm

well its raining and cool out side so thats a goodthing with it being turboed so does 0.7 sound about right then
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Postby peterg » Sat Jul 30, 2005 1:41 pm

No, if its cold (and it probably isnt that cold with it being summer) then it will boost more. I have a bleed valve and chip fitted that works nicely most of the year, however on a frosty winters morning it will cut out due to overboost.
Your maximum boost probably wont be reached at highest revs either.....watch that guage carefully and you will see the boost peaks then drops to a level. I dont know about your guage, but the one Ive got doesnt stay still for long enough and isnt accurate enough to tell the difference between 0.7 and say 0.8 bar.......driving the car kind of gets in the way of looking too closely as well!!!!
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Postby steveatyork » Sat Jul 30, 2005 2:02 pm

i was driving the car my dad was watching the gauage he said it peaked at 0.7 then dropped to 0.6 i did it in 4th gear starting at low revs so the boost could build up slowly for a more accurate reading
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Postby Juzzblack » Sat Jul 30, 2005 2:06 pm

I thought 10psi (0.7bar) was the standard boost level. I've just bought a boost upgrade kit from D.G. which should increase it to around 15psi (1bar).

I've ordered a boost gauge, which I'm going to fit to see what it's boosting standard, before I fit the upgrade kit.
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Postby steveatyork » Sat Jul 30, 2005 2:17 pm

my alpines probably boosting fine then thats all i wanted to know
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Postby peterg » Sat Jul 30, 2005 2:56 pm

Ooops.......getting my bar and PSI confused!!!! Meant 9 PSI was factory, but it could be 10!
1 bar is 14.5 PSI.....your car sounds like its boosting fine.
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Postby peterg » Sat Jul 30, 2005 3:05 pm

Make that 14.7 PSI = 1bar.......night shift has scrambled my brain :shock: :D
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Postby David Gentleman » Sat Jul 30, 2005 4:18 pm

Its meant to run 11.76psi and then hold at 9.55 (0.8bar and 0.65bar)
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Postby steveatyork » Sat Jul 30, 2005 8:27 pm

mines not that far out then :)
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Postby David Gentleman » Sat Jul 30, 2005 8:58 pm

..but its the wrong way though... :wink: :twisted:

I checked my new yellow GTA today, holding at 8psi, ive now adjusted a bit and is now holding at 11, after peaking high, maybe down to a weak actuator or fueling.

Going from 8psi to 11 does make a big difference, even better when it's holding at 14!
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Postby steveatyork » Sun Jul 31, 2005 10:01 am

i might have a tinker with the actuator today to see if i can raise it upto factory boost,i was was thinking of buying the boost upgrade kit from you but i might aswell wait for the ecu because the boost upgrade kit will be useless once the ecu is in place wont it?
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