Navara_cruz
Member
Guys, is this only for the D21/D22 or can be done on the D40's as well.
and is it worth doing this mod in regards to performance/ fuel economy?
and is it worth doing this mod in regards to performance/ fuel economy?
3.0 litre EGR/Butterfly/Swirl Mod
- Thread starter stubbsy351
- Start date
Help Support Nissan Navara Forum:
this particular setup is for only the D22 with ZD30 motor.
D40's run a completly different system. they use the variable turbo instead of the intake butterfly to shove more EGR in. so if you block EGR you need to modify the turbo control setup.
outright performance should not change as most (but not all) vechiles turn off EGR at full throttle. the improvements is in the lower rpm and at cruise. obviously improvement there usually equals better fuel economy.
however a lot simply do it for reliability. the EGR gunks up the inlet manifold and incorrect operation increases EGT's which can cause cracked heads or blow pistons.
D40's run a completly different system. they use the variable turbo instead of the intake butterfly to shove more EGR in. so if you block EGR you need to modify the turbo control setup.
outright performance should not change as most (but not all) vechiles turn off EGR at full throttle. the improvements is in the lower rpm and at cruise. obviously improvement there usually equals better fuel economy.
however a lot simply do it for reliability. the EGR gunks up the inlet manifold and incorrect operation increases EGT's which can cause cracked heads or blow pistons.
When blocking EGR on inlet side (I'm using 3mm alloy) do you do it where the steel tubing comes around rear of motor & attaches to cast iron box. OR do you block it at the inlet manifold where the cast alloy tube comes up & meets the inlet manifold ???? Has anyone got a photo of plate in place ( instructions are good, but a photo is more like 100,000 words !)
Laith
Member
I just blocked mine at the inlet manifold.
There is no reason to block it anywhere else.
There is no reason to block it anywhere else.
Laith
Member
Why?
If its blocked how could it be better blocked?
If its blocked how could it be better blocked?
Laith
Member
It will just fill with gas until its full and then no more will go in.
I dont see a problem with that. It was designed to handle hot gas so it wont hurt.
At the end of the day if it makes you feel better, do it. I just recon its a waste of effort for no gain as its much easier to work at the inlet side rather than the exhaust side.
The important thing here is that you do it one way or another.
I dont see a problem with that. It was designed to handle hot gas so it wont hurt.
At the end of the day if it makes you feel better, do it. I just recon its a waste of effort for no gain as its much easier to work at the inlet side rather than the exhaust side.
The important thing here is that you do it one way or another.
Matt - VNET Pro
Member
Has anyone done these mods to an 08/09 D22, is it worth doing to this model? Thanks.
if you thinking of the YD25 then it depends on if its variable turbo or not. i havn't had a look at D40 or the D22 YD25 setup.
1 is easier.
if your really fussy put one at number 1 and another at the turbo end of the egr pipe.
if your really fussy put one at number 1 and another at the turbo end of the egr pipe.
Cheers bro. Might have a tinker this afternoon.
guys what parts do i need to go buy to do the EGR mod? t peice bit etc? what size and whats it called? hose or anything else. I know i need so alloy plate. Oh i'm going to do the catch can thing also. thanks for a part list as i don't want to look like a goose asking a 17 yr old kid in supercheap 
other than a bit of scap steel for the plate, no other bits required. all T pieces used are the ones allready fitted.
no.
the gunk is in the inlet pipes not the combustion chamber. diesel fuel (+cetane booster/additive etc) is injected into combustion area not inlet manifold so there is no way it can possibly clean out the intakes.
there was a one stage a company that did "carbon" clean. basically did a water/methanol injection but using some other cleaning agent. apparently it cleans it all out in one go. not sure how good that is on the motor tho.
