Does Cosworth remove EGR function? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

sly · 03-22-2016, 02:01 AM

It seems the FA20 does not have an EGR valve and instead relies on the dual AVCS to provide an EGR function. Basically by overlapping the intake and exhaust valve timing so that both are open at the same time, exhaust gasses are pulled back into the engine creating an EGR function. My question is does the Cosworth tune keep or eliminate the EGR function?

I've been looking into the purpose of the EGR system and the more I read about it, the more I don't like it. I don't like the idea of pulling in dirty exhaust gasses into the engine just to gain a minimal increase in fuel economy. I would rather keep a clean engine and save the maintenance costs of having to do intake cleanings. Matt@Cosworth... and input on this?

Thanks.
[

attn: @Matt@Cosworth

go_a_way1 · 03-22-2016, 09:25 AM

@Matt@Cosworth this dude has a question

go_a_way1 · 03-22-2016, 12:59 PM

@sly LMAO at reason for edit " forgot to send up the bat beacon" hahahaha!!

Also I am sure you can tune it out if you wanted to

Matt@Cosworth · 03-22-2016, 07:56 PM

your're quite correct about the use of the AVCS to enable EGR function

on our tune I kept this functionality in at low engine speed and loads to ensure the car passes an emissions test but it was otherwise disabled to maximize power everywhere else

03-22-2016, 02:01 AM	#1
sly Senior Member Join Date: Dec 2015 Drives: 2016 Cosworth 2.2 BRZ Location: TN Posts: 335 Thanks: 88 Thanked 198 Times in 124 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Does Cosworth remove EGR function? It seems the FA20 does not have an EGR valve and instead relies on the dual AVCS to provide an EGR function. Basically by overlapping the intake and exhaust valve timing so that both are open at the same time, exhaust gasses are pulled back into the engine creating an EGR function. My question is does the Cosworth tune keep or eliminate the EGR function? I've been looking into the purpose of the EGR system and the more I read about it, the more I don't like it. I don't like the idea of pulling in dirty exhaust gasses into the engine just to gain a minimal increase in fuel economy. I would rather keep a clean engine and save the maintenance costs of having to do intake cleanings. Matt@Cosworth... and input on this? Thanks. [ attn: @Matt@Cosworth Last edited by sly; 03-22-2016 at 12:50 PM. Reason: forgot to send up the bat beacon...

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03-22-2016, 07:56 PM	#4
Matt@Cosworth Senior Member Join Date: Dec 2015 Drives: blue - Cosworth SC stage 3.0 Location: Northants - UK Posts: 333 Thanks: 3 Thanked 394 Times in 184 Posts Mentioned: 34 Post(s) Tagged: 1 Thread(s)	your're quite correct about the use of the AVCS to enable EGR function on our tune I kept this functionality in at low engine speed and loads to ensure the car passes an emissions test but it was otherwise disabled to maximize power everywhere else

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