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- - S4 Turbo Question (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/s4-turbo-question-67664/)

dac	10-07-2007 05:14 PM

Inside the exhaust manifold of a S4 Turbo @ the REAR rotor, there is a tube that sticks out into the manifold. What is it?

Can I grind it away and weld it up?

BLUE TII

10-07-2007 08:07 PM

The tube carries fresh air from the airpump to help burn any unburnt hydrocarbons in the exhaust as part of the port air system.

If you are not worried about emissions it is not necessary.

dac	10-07-2007 08:32 PM

Quote:

Originally Posted by BLUE TII' post='884825' date='Oct 8 2007, 01:07 AM

The tube carries fresh air from the airpump to help burn any unburnt hydrocarbons in the exhaust as part of the port air system.

If you are not worried about emissions it is not necessary.

Thank You.. It's coming out then.

j9fd3s

10-08-2007 11:38 AM

its for egr, but yeah, grind it flush

trev0006

10-14-2007 11:51 PM

freind of mine did this with no problems.

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