I've read that the EGRs assist with keeping head temps down. Any issues with that by doing the blanking?Quote:
Originally Posted by Pippin
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I've read that the EGRs assist with keeping head temps down. Any issues with that by doing the blanking?Quote:
Originally Posted by Pippin
I've not heard that, do you know the reasoning behind that? I guess any increase in power would increase heat generated but otherwise I can't see any possible cause by deleting the EGR. NickQuote:
Originally Posted by PeterOZ
Since they blast slightly cooled hot mucky exhaust gas that seems unlikely but they do assist in the coolant warm up process. That may be the more interesting discussion about fully deleting the EGR coolers and coolant pipe work.Quote:
Originally Posted by PeterOZ
Those EGR coolers are another sneaky source of coolant contamination along with the oil cooler, as recently discussed, that may make the owner fear they have a blown head gasket.
The EGR coolers are incredibly expensive also.
I haven't heard that - if anything it should be the opposite, when they open hot exhaust gases (there is a EGR cooler to try and reduce these temps) are fed into the induction system. When they are closed it is normal inlet air temps going in, as there is when they are blanked.Quote:
Originally Posted by PeterOZ
Garry
There is no increase in power in a blanked engine over and engine with perfectly working EGRs. The engine will work better than an engine that has faulty EGrs where the EGRs are locked open letting hot exhaust gases into the engine all the time and causing bad running.Quote:
Originally Posted by Pippin
So blanking does not increase power on a perfectly running engine.
That’s what my Brocky Energy Polarizer is for.Quote:
Originally Posted by 101RRS
Yes, EGR lowers temperature. Yes it reduces power. Yes they make more power when its disabled and removed.
Just quoting - easier.... Exhaust gas recirculation - Wikipedia
- Exhaust gas—largely nitrogen, carbon dioxide, and water vapor—has a higher specific heat than air, so it still serves to lower peak combustion temperatures. However, adding EGR to a diesel reduces the specific heat ratio of the combustion gases in the power stroke. This reduces the amount of power that can be extracted by the piston. EGR also tends to reduce the amount of fuel burned in the power stroke. This is evident by the increase in particulate emissions that corresponds to an increase in EGR
- By feeding the lower oxygen exhaust gas into the intake, diesel EGR systems lower combustion temperature, reducing emissions of NOx. This makes combustion less efficient, compromising economy and power.
- The normally "dry" intake system of a diesel engine is now subject to fouling from soot, unburned fuel and oil in the EGR bleed, which has little effect on airflow. However, when combined with oil vapor from a positive crankcase ventilation system (PCV) system, can cause buildup of sticky tar in the intake manifold and valves
Incorrect.Quote:
There is no increase in power in a blanked engine over and engine with perfectly working EGRs. The engine will work better than an engine that has faulty EGrs where the EGRs are locked open letting hot exhaust gases into the engine all the time and causing bad running.
So blanking does not increase power on a perfectly running engine.
Aside from power loss related to fouling the intake tract, the egrs are firmly closed when maximum power is being asked for. They are only open at part or low load. So I'm struggling to see how they are reducing power.Quote:
Originally Posted by Tombie
You seem to be thinking in terms of maximum power (WOT). Power curve is impacted during acceleration and EGR if monitored can be seen to be open partially under many conditions.Quote:
Originally Posted by BradC
The manufacturers acknowledge that power is reduced by EGR.
