Low boost after porting
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Low boost after porting
I had my s5 turbo waste gate ported and did all the removal and reinstal of he turbo myself. I was only able to get 2 out of 3 bolts on the down pipe to th turbo because I cross threaded one of the studs. I have an exhauslt leak now. I hooked every thing else up right. Except for the fact that I severed the o2 sensor wire on accident.
On my short test drive I gunned it and found that my boost guage only went up yo 5. It used to get up to 10 since the exhaust is opened up a bit. That's on a blown rear rotor too. What's wrong? Did I mess something up or did the guy I had port my waste gate go too large? You can fit a quarter through the bigger whole. Help please!
On my short test drive I gunned it and found that my boost guage only went up yo 5. It used to get up to 10 since the exhaust is opened up a bit. That's on a blown rear rotor too. What's wrong? Did I mess something up or did the guy I had port my waste gate go too large? You can fit a quarter through the bigger whole. Help please!
#2
Sharp Claws
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I had my s5 turbo waste gate ported and did all the removal and reinstal of he turbo myself. I was only able to get 2 out of 3 bolts on the down pipe to th turbo because I cross threaded one of the studs. I have an exhauslt leak now. I hooked every thing else up right. Except for the fact that I severed the o2 sensor wire on accident.
On my short test drive I gunned it and found that my boost guage only went up yo 5. It used to get up to 10 since the exhaust is opened up a bit. That's on a blown rear rotor too. What's wrong? Did I mess something up or did the guy I had port my waste gate go too large? You can fit a quarter through the bigger whole. Help please!
On my short test drive I gunned it and found that my boost guage only went up yo 5. It used to get up to 10 since the exhaust is opened up a bit. That's on a blown rear rotor too. What's wrong? Did I mess something up or did the guy I had port my waste gate go too large? You can fit a quarter through the bigger whole. Help please!
all you need to get it back up now is a way of raising the boost manually, ie a boost controller.
#7
Sharp Claws
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generally it works like this though. the single line goes into the boost controller from a good pressure source off the compressor housing or intake manifold somewhere. the teed line, one has a restrictor pill in it and one doesn't, the restrictor pill line goes to the wastegate actuator and the open line goes to the turbo intake duct piping or put a filter on it and strap it somewhere in the engine bay(preferable to plumb it back in if you still are running the stock AFM).
some MBCs just have 2 lines though and bleed air through the valve itself, so i have no idea which yours is. some extremely cheap MBCs have no atmospheric vent at all.
Last edited by RotaryEvolution; 04-09-11 at 04:57 PM.
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