Aftermarket manifold help

thesri

thesri

Hi, Ive just bought and fitted a tubular exhaust manifold on my sri.

The only problem is theres a pipe that's meant to fit into the side of it, that wont fit in because of the hole on the maniflold is too big. I believe its the EGR (exhaust gas recirculation) pipe.

So i've just blanked off the hole in the manifold where it's meant to go, and removed the pipe. Just wondering what the point of the pipe is, and what effect removing it has, if any?

The car does seem to run fine without it though

Thanks for any help
 
lol i noticed sod all difference when i took my EGR pipe off.

Wouldnt worry about it fella, mine doesnt even have a place to refit the pipe on the mani :P
 
No it doesnt make anything fail at all, I removed it and even left the intake side valve unblocked. Just close off the tiny pipe that goes into the airbox and the valve wont operate. Ive got a fair idea of the manifold youve bought and I had similar trouble with connecting the EGR.
 
thanks for the help guys.

Just had a straight through ss exhaust fitted. Looks and sounds great and gives a bit more responsivness and power with the cat removed. I'l try and get some pics up soon
 
egr valve as said stands for exhuast gas recirculation,which in most cases actually causes more damage to an enginr than good, yes it controls emissions, but it also causes more carbon build up on the internals.which is not a good thing.remove it fully and youll be fine dont just disconnect pipes tho
 
lewis said:
egr valve as said stands for exhuast gas recirculation,which in most cases actually causes more damage to an enginr than good, yes it controls emissions, but it also causes more carbon build up on the internals.which is not a good thing.remove it fully and youll be fine dont just disconnect pipes tho
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EGR would only be detrimental to an engine if it was running badly/in bad shape.

A good condition engine will suffer no more than usual carbon deposits even with EGR due to the effieciency of the combustion process.

Diesels can suffer clogged EGR valves/tubes unless regularly maintained due to the thickness of diesel as a fuel, and subsequent density of the exhaust gases but petrol engines have no such problems. Also, disconnected an EGR system generally actually CAUSES the EGR pipes to become blocked by carbon deposits as no gas is flowing through them.

It's also worth noting that the recirculation of the inert exhaust gases also prevents energy loss via heat into the combustion chamber surfaces, which in tern means more energy is availible for the combustion cycle, improving effiecieny, and that typically only 5-15% of exhaust gas is recirculated, which to be frank, isn't exactly a lot.

I researched this quite heavily when i had to disconnect my EGR valve for my induction kit.
 
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