mike ka

1800cc 16v L reg mondeo 115PS engine

does the EGR system get switched to the open position or does it get switched to close?

im fitting this engine into my ford ka, currently in the process of it and im hoping that it stays in the closed position so i can just blank it off for now just to make sure the engine gets running ok, before i completely remove the system.

few pics to show you.......

sailorbob

EGR is never actually closed or open when in operation, the ecu drives it on a dutycycle basis. If you are getting rid of it then blank it a both ends. The question is why are you getting rid of it? You will get worse fuel economy with it gone, it doesn't hurt power output but reduces pumping losses in the engine.

It looks a tight sqeeze in that engine bay

mike ka

because of the lack in space, it is a tight squeeze :P

also i have had to use the cast efi inlet manifold because the plastic manifold that came on the engine wont physically fit in there lol

i have put the original injector rail onto that manifold and also going to fit the original throttle body to it too because it is slightly bigger.


it will be worth it in the end tho, just a project to keep me busy

Moondust_crust

go on then whats egr ?

mike ka

exhaust gas recirculation

The EGR stands for Exhaust Gas Recirculation. Exhaust gas is routed back into the combustion chamber because the exhausted air is much hotter than the intake air (try touching a muffler sometime). By sending warmer gas into the combustion chamber, the air/fuel mix does not have to do as much work to heat up, and your engine runs more efficiently.

quick definition from a website

Moondust_crust

so wouldent removing this put more of a strain on the engine? ie making it work harder, what are the benifits of removing this ? cheers mark.

mike ka

i dont think it will harm the engine tbh

its purpose is for emmission control during cold start, i believe. maybe someone more technically minded will elaborate on this.

sailorbob

Sorry Mike, the website you got your explanation from is wrong. EGR is used to reduce the formation of nitrogen oxides during the combustion process. By feeding exhaust gases back into the combustion chamber the combustion temperature is reduced and because higher temperatures cause nitrogen oxides to be formed the EGR thus reduces them. A side effect of EGR is that engine pumping losses (the engine does less work on the intake stroke at small throttle openings) are reduced too and this means slightly better fuel economy. Removing EGR doesn't harm an engine it just means that emissions will go up and mpg down.

Moondust_crust

so by removing it you are not getting better bhp or even more torque, seems to me like its better leaving it on
cheers mark.