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Discussion Starter #1
Well, not exactly, but damn close enough. As we all know the EGR system robs some power by injesting hot/dirty exhaust gases directly back into the intake. We can't remove the valve without throwing a code and we can't block it without throwing a code. If we block it the ECU throws a "Isufficent Flow" code as well as the ODB emissions monitor will show error since the ECU actually detects the lean out caused by the EGR opening and flowing exhaust back, and this is the key, the ECU does not care weather it is hot exhaust or cold/clean intake air. So I decedied to machine out a EGR Bypass Adaptor that allows us to connect eaither a breather filter or a hose connected back to the breather fitting on the intake. I just came back from a 50+ mile test drive with no codes thrown and for good mesure before I left on the drive I reset my ECU and emmissions monitors after the drive I checked and the EGR emissions monitor was happy with the bypass, so this will not effect passing emissions, and probably will pass visual if you hook a hose back into the intake.





Thanks to Shonda for jogging my brain and getting me to think of this.........

This will also work for 6th gens and K-series although the bypass connection is in a different place for Ks......
 

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v not some model, my girl
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saweet! paul you are having too much fun with that milling machine. lol
my car is going to need this. my CEL has been on for a while because of my EGR.
 

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Discussion Starter #4
Pull the two stock studs that hold the egr valve on and replace them with longer bolts.
 

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:woot: Nate and I were just talking about this the other day.
 

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Discussion Starter #9
It does not mesure exhaust temp, and how would not ingesting hot exhaust gases cause higher exhaust temps?????
 

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There's no EGT sensor on these cars? I didn't know that.

EGR lowers the combustion temperature. I believe this is because the exhaust gas can absorb greater specific heat. EGR also tends to make the engine more efficient because it allows advanced timing (lower temp = less preignition tendency) and less throttle loss (less power available at part throttle = higher throttle angle).

Isn't the EGR turned off at full engine load anyway? I've never done anything with a Honda engine at work, but all the GM/Chrysler/Ford engines have zero EGR flow at anything above like 90% throttle.

edit - I understand what you're trying to do, but it doesnt really work on modern cars with modern electronics and variable EGR. The EGR is off at full throttle so it only 'robs' power at part throttle, which in turn actually (and counterintuitively) makes the engine more efficient (better gas mileage). So unless you're a part throttle racer unconcerned with fuel economy, EGR is one of those things that does very little harm aside from a little more carbon deposits upstream of the cylinders. EGR does take a lot of power out of diesels and older gasoline engines, but in the modern ones it really makes no difference. I appreciate you trying to do new stuff and you've done a lot of bad ass things on the J series, but IMO this does more harm than good. However, if Honda uses the EGR at full throttle (unlike every other gasoline engine I've ever tested/instrumented), this is all wrong.
 

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so with this, the exhaust gases still get recylced but never make it into the intake manifold, only fresh air does? If i am correct here with my intrepretation of this, where do the recylced gases now go? If i'm way off please tell me.

Also, i too was under the impression that no exhaust gasses get recylced during full throttle? is that true?
 

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Nice work Paul. What do I need to do to get you one for me? I have two extra EGR valves....

Also, we need to discuss the J37 or whatever the current popular/good build is... I've got the itch...

Car runs amazing, by the way... constant 37 mpg now. Love it.
 
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