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Ces Exhaust Problem


Jman

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  • The Cleaning Dudes Ute
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  • Member For: 18y 10m 12d
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  • Location: Bentleigh, Vic, Australia

Hi guys.

Heres the list of mods for my car...

CES Exhaust mated to a 5" Balistic Cat

v3 Rapid Cooler w/coldside pipework

Deka Injectors

Walbro Fuel Pump

Thermostat

Nizpro Valve Springs

I'm getting my car tuned at the moment and this exhaust has been doing my head in.

My original tune was set to be finished off Tuesday, but because the exhaust was flowing too well (believed to be due to the cat) it was suffering from sever boost creep. My tuner thought it appropriate that the wastegate mod be done.

Its just been done and they're putting it all back together at the moment, but NOW the problem is the wastegate pipework on the CES dump. Its too small and doesn't quite open up the wastegate properly. My tuner was on the phone to CES just before and they said a few modifications around the face (ie: belmouthing it) could fix the problem. They're going to try that tomorrow, if it doesn't work... here are my options...

1) Simply replace with a 4" dump

2) CES also make a split dump pipe which has a 2" wastegate pipe instead of the 1.X" whatever it is

Originally I wanted to keep away from the turbulant 4"er, but at the moment I'm not too sure. Has anyone with the CES system had this problem before? Kinda disappointing as I've always thought highly of the CES system.

Cheers,

Jarrod.

Edited by Jman
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  • The Cleaning Dudes Ute
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The above post was not meant to flame CES by any means. Its a fantastic exhaust and am very impressed with the design.

The problem could be caused by

a) using a wastegate valve which is too large regardless of the dump pipe, or

b) after speaking to Trevor at CES (who was very helpful mind you) its quite possible I may have a gayspec actuator which has too much throw in it

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  • The Cleaning Dudes Ute
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  • Member For: 18y 10m 12d
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can you change the wastegate spring without changing the flapper and enlarging the port?

Sorry mate can't help you out there, not too sure.

We've checked the actuator, that's fine so that's not the problem.

The dump pipe is being sent back to CES to have the 2" wastegate section welded in.

Haven't found much info on the 3.5/2" setup, what do people think of them???

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  • The Cleaning Dudes Ute
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whoops forgot to add that to the list, yea a 12 pound actuator

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  • You are a dead set goose
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  • Member For: 19y 2m 25d
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Why don't you like a 4" dump? Looks like it might be the only sensible option if they can't widen the mouth of that wastegate pipe...?

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  • The Cleaning Dudes Ute
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  • Member For: 18y 10m 12d
  • Gender: Male
  • Location: Bentleigh, Vic, Australia

Yea it its gonna have to be.

I prefer the setup of the split dumps. My car is a daily and one thing I didn't want to sacrifice is good response. The dump pipe will be sent off Monday, wish me luck.

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