for those that want to but cant be arsed to make their own blanks up!:

 

http://www.conceptzperformance.com/Cart/description.php?II=543&Car_Type=300&UID=

already on my shopping list :)

Paul,

 

Can u explain what the need is to remove the EGR please....

 

Oh, and what is the EGR lol, Exhaust Gas R......egulator?!?!?

 

Mark :D

Exhaust Gas Recirculation.

 

its used for lowering emissions (NOx) by reducing combustion temps.

 

if it fails then it can cause running problems, so many bypass it when the engines out.

im not convinced that its needed to bypass this & dont know of anyones that actually HAS failed??

 

anyone here that has actually experienced failure??

EGR System is exhaust gas recirculation.

It's a system used to reduce NOx emmissions by reducing cylinder temps below the point at which they are formed. It does this by replacing some of the air/fuel charge in the cylinder with exhaust gas (inert). As this inert gas dosen't burn then the amount of heat / cycle is reduced and chamber temperatures lower than they would be otherwise.

The system is only active at mid engine speed and low loads.

As cyl temps are lower then the mixture can be leaner when the system is active. This means that there is the potential to have detonation when it's removed. I have never seen this happen, but the potential is there, when I removed it I mapped a little more fuel in to compensate over the range where it operates.

The downside is that as you're only fiilling say 90% of the cyl volume with combustible charge then you're loosing power. Won't hurt your dyno figures as it's not active at full power.

 

Removing it is a bit of a bugger, unless it's broken or the engine is out, or you want to tidy up the engine bay I'd leave it.

 

Lol, beat me to it by a few seconds Paul!

I've seen the solenoid that operates it fail, never seen a stuck valve though.

 

Lol, beat me to it by a few seconds Paul!

 

LOL!! you just copied me!!

 

Miss, johns been copying again!! :D

Damn, caught :o :D:D

I've seen the solenoid that operates it fail, never seen a stuck valve though.

 

Where was that then? :dance::D

I made my own kit in about half an hour ;)

Thanks guys, very interesting stuff.....

 

NOx emissions?? Nitrous Oxide?!? And why lower them?

Thanks guys, very interesting stuff.....

 

NOx emissions?? Nitrous Oxide?!? And why lower them?

 

nitrous oxide is N20 ;)

Oh ok, so what NOx?

NOx is a generic term for all the not completely burnt nasties you get out of an exhaust. NO, NO2, NO3 etc These can be very nasty and not like N2O at all.

 

And they oxidise in the air to produce acidic rain (Water + Oxygen + NOx gives you things like HNO3 (nitric acid) and HNO2 (nitrous acid). That's why there are EGRs in the first place - to stop your lungs being eaten away!

oxides of nitrogen ;)

Chemistry lesson anyone? LOL

fVck me but WOW!!!! :shock:

 

Thanks guys, I need a drink after reading that!!

 

How do u know that anyway gio?

A long standing interest in *ahem* certain organic chemical compounds and a chemistry A-level from the days when we still had concentrated sulphuric acid in jars on the bench (and sodium under oil). Oh, and a chemistry teacher with a sense of humour - eg when teaching us about liquid oxygen, he dunked an unlit Marlboro in it, stuck it in his mouth, lit it and inhaled the entire thing in one short drag! hahaha :rofl: