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$1750 For My Full Exhaust, Problems with my Dump Pipe

Cubes

By Cubes,
in Engines & Forced Induction

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raist60 Community Regular

raist60

Posted
Posted

I think your complaining for nothing. Is the first pic you posted your front pipe? Coz that thing looks quite good to me? (It may have needed to have the weld ground down) but thats it

As for you other issues. Im surprised it didnt cost more than 1750 considering stainless. Mine totalled up with similar crap to about 1000 in mild steel.

The weld spots are there because MOST exhaust joints do not have the cash to buy a mandrel bend machine (****ing expensive) so they use pre made bends which need to be stuck together.

As for the "rust" thats what happens to the welds because they dont recoat the metal after the weld.

I reckon your exhaust looks / sounds like a decent one man. I cant see the issues.

Cubes Grand Master

Cubes

Posted
  • Author
Posted

hrmm the only reason why I became concerned is because I had a stock dump pipe that I had just looked, then I had a look at the custom dump pipe and I noticed that there was 15mm raise in front of the exhaust wheel that joins with a sharp V type shape before tapering down the dump pipe.

I thought the whole idea of a non standard dump pipe was to try and open it up as much as you can.

Not over measure and then try to fix it up by welding another little piece of metal in to bring it back down to the flange.

Basically compared to the custom dump pipe the stock one looks like it is able to flow better.

Except on the custom it obviously has better flow for the Wastegate.

And I'm getting boost drop problems.

Even with the VG30BB turbo.

Maybe this is the problem. I am not sure.

When the EBC is in Auto mode It will learn not to drop boost some how. But Auto mode is crappy and boost response is not as crisp.

lowlux Proficient

lowlux

Posted
Posted

hey joel when u put the vg30 turbo on,did u use the rb20 actuator, if u did, did u make sure the wastegate was fully closed cause it sounds as if it leaking,or maybe the exaust shop played with it i dunno,maybe check that its in the fully closed position

SlowGTS-t Contributor

SlowGTS-t

Posted
Posted

if you hear a metalic rattling coming from the exhaust housing, chances are your wastegate is not completely shut.

Take the actuator off, bend the arm so that its shorter.

Do if until the hole completely misses the tit that sticks out of the actuator arm. You'll have to pull the arm out from the actuator to get it back on.

Cubes Grand Master

Cubes

Posted
  • Author
Posted

What had happened to the VG30 BB turbo I had was that the bearings inside had developed a little bit of rust as they were sitting around for a while.

When the bearing spins and hits the rust spot it would make the a noise. hence the wzzz noise.

I spoke to some one also in the know about exhausts and any rise in front of the exhaust wheel will cause problems.

Especially when the wastegate starts to open.

Just have to wait until JMS open now on monday to send the turbo back.

Then give the exhaust place a ring as they responded to my email and have no problems with it.. So all is smooth sailing

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