begi shanghai overboosting bad, spacer between turbo and dp?
#1
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begi shanghai overboosting bad, spacer between turbo and dp?
my begi shanghai kit has been overboosting since day one. I am assuming it is because of the flapper banging against the separated gases tube on the downpipe. Doesn't matter how I adjust the waste gate it still creeps to overboost protection on ms (152 kpa, 160 kpa, whatever it is set to). Ive done some research and it seems that some people run a spacer between the turbo and down pipe. I called begi and have been waiting for a call back for a couple weeks. I just need to know where I can potentially buy one from. Is it just a flange or what?
#3
my begi shanghai kit has been overboosting since day one. I am assuming it is because of the flapper banging against the separated gases tube on the downpipe. Doesn't matter how I adjust the waste gate it still creeps to overboost protection on ms (152 kpa, 160 kpa, whatever it is set to). Ive done some research and it seems that some people run a spacer between the turbo and down pipe. I called begi and have been waiting for a call back for a couple weeks. I just need to know where I can potentially buy one from. Is it just a flange or what?
#8
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measured base pressure with a bicycle pump. Starts to move around 5 psi. It barely builds any boost with arm disconnected which I've read is normal, something like 2 psi. I just pulled the bolts joining the turbo to the dp and it seems like the flapper is getting stuck in the tube.
#10
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ok so comparing it in person, the way it is now, I don't see how any exhaust gas would escape from the smaller tube. Now, im pretty new to the turbo scene but id imagine its supposed to open at least half way. The flapper would have to be small enough to fit inside of the tube for it to work but its not. It starts to make contact shortly after the flapper starts to move so im thinking some sort of spacer would allow it to open enough. Seems as if I can maybe grind open the down pipe a little bit around the smaller tube but its so thin I might grind through the welds so i'd rather a spacer.
#12
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I just tried this and it just wont work, I think the flapper is too big to fit. It almost goes in but the tube tapers down a little bit and it gets stuck. If I try and bolt it together the flapper sticks to the dp
#15
Could you just sandwich another flange between the downpipe and housing?
For 200SX 180sx CA18 sr20 T25 GT25 T28 GT28R Turbo Exhaust Downpipe Flange 7254 | eBay
For 200SX 180sx CA18 sr20 T25 GT25 T28 GT28R Turbo Exhaust Downpipe Flange 7254 | eBay
#16
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Could you just sandwich another flange between the downpipe and housing?
For 200SX 180sx CA18 sr20 T25 GT25 T28 GT28R Turbo Exhaust Downpipe Flange 7254 | eBay
For 200SX 180sx CA18 sr20 T25 GT25 T28 GT28R Turbo Exhaust Downpipe Flange 7254 | eBay
#18
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so a flange would be better right. The issue is the flapper cant open all the way due to the opening in the dp being too small. A blank flange like the one you linked looks like it has more space so the flapper can open sufficiently
#20
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You are saying that the DP is preventing opening, yet with the WGA disconnected, that problem goes away.