Dump valve problem
#1
Dump valve problem
Ive got a classic wrx, had a forge dump valve fitted, but only seams to dump when your really reving the car hard 5-6000rpm, ive heard other classics dump at really low revs. Any ideas, ive checked all the pipes and theres no leaks or anything, im wondering if the dump valve spring is too strong. Im running standard boost 14psi. cheers
#2
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Mine dumps anywhere after about 3-3.5k rpm on my 96 classic with a Forge BOV. Sounds silly but is it definitely connected in right, no splits or leaks on the pipes?
#3
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sounds like you have the red spring in your dumpvalve, I also have a forge with a red spring, which is meant to hold the boost better (so I've been told) which means you wont get a big noise unless you are at high revs. There is a yellow spring which will 'dump' at lower revs but may not hold the boost as well
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mines a forge on my 97 uk turo also....did have a crap make on before that which wasnt loud, put the forge on and actually got annoyed how often and loud it went off at low revs, lol. not sure what colour my spring is tho mate. although on the crap dump valve i had, i shortended the spring in that, to make it louder. not tellin u to go cut it or anything, but to take it apart im sure its the same, with the screws around the outside casing. try swapping with someone on here with a red sprung forge??
Ash
Ash
#7
or you could buy my turbosmart bov it is fully adjustable no need to replace springs , it's for sale in the ....for sale section
herehttps://www.scoobynet.com/private-sa...osmart-dv.html
herehttps://www.scoobynet.com/private-sa...osmart-dv.html
Last edited by stigaz; 20 June 2008 at 11:25 PM.
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#12
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Sounds like the spring to me, don't go by what the forge website states about psi rating for the diff colour springs, this caught me out. Get yourself a service pack from forge as this helps and swop the springs over to what suits your car
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