EGR block off??

[Lenn]

What purpose would blocking off the EGR system serve on a 420a?? Ive read a few posts about how to do it but never seen why it would be attempted.

 

[Defiant]

It'll boost your combustion temps and reduce engine life while netting no gain in performance.

 

[Lenn]

HAHA. So then why have I seen people want to do this to their cars?? My engine builder has a 92 GSX with EGR blocked off and Ive seen a few posts on how to do it. Just curious.

 

[DSM_Nick]

That would be a question I have as well. Why do people do an EGR block? Is it really any more effective on your engine or better? I wouldn't think it would be very good to block off, seeing as most items put on factory serve a purpose. Also, I had heard that the egr only recirculates your exhaust gases during light loads. Which would not be how most of us are driving our cars

 

[Bud92gsx]

Its for fuel economy..
But I would like to know why us dsmer's do it...And what can I expect to gain from blocking it off??

 

[turbobluers]

It supposedly keeps carbon from building up in your intake manifold.

I bought a car with it already blocked off and the vacuum delete. I've been working trying to find the parts to take it back to stock since in the eyes of the PA emissions man, epic fail...

IMHO leave it on... unless someone can convince me otherwise before I find all the parts to go back to stock...

 

[Bud92gsx]

Really..Cause I took it off the other day and the was hella carbon in the EGR...Maybe I'll suck a capfull of water into the manifold and see what it knocks loose..

 

[xioca]

How does blocking off the EGR cause reduced engine life?

 

[turbobluers]

If what Defiant said is true about higher combustion temps I can see it, but i'm no engineer or physicist... Defiant, anyone, care to weigh in?

 

[Bud92gsx]

This Is all news to me sir..

 

[All_Boost16G]

Alot of people Delete that stuff to clean up teh engine bays, not for the performance gains. I did the vaccum line delete, and it cleans alot of the old vaccum lines out of the way, and give it less chance to leak out of them.

 

[turbobluers]

Alot of people Delete that stuff to clean up teh engine bays, not for the performance gains. I did the vaccum line delete, and it cleans alot of the old vaccum lines out of the way, and give it less chance to leak out of them.

Yeah, I can see the VD mod (you like how I turned it into an acronym like everything else we seem to do to these things??? oh and its kinda dirty) I can see the use for it, but is there HONESTLY anyone who can give a concrete reason for the egr? I've always just thought it was for keeping a little more carbon out of your intake manifold...

As for the VD, I'm probably going to use silicon lines to sturdy up, and try to make it "look" like the stuff is hooked up for THE MAN. after that, VD will probably go back into effect. unless anyone on here has a PA inspection license..... jk.... but seriously...

*is that the most times VD has been discussed in a single post????*

 

[xioca]

This Is all news to me sir..

Eh me too. Egr is a theory.

 

[turbobluers]

in Pa i can title the car as a "collectible vehicle" to dodge emissions since it has a "substantially modified engine and exhaust" (taken from actual PA state paperwork) but I could only drive it for special events and holidays, or for the equivalent of 1-2 days per week... kinda defeats the purpose of having the car i always wanted...

i live in Beaver County... all other counties bordering me don't have emissions, but apparently the fabled hole in the ozone is right above my neck of the woods...

I should just get the dang thing done and get it inspected. It will only take a 70.00 universal cat and re-hooked egr to get it to pass, i just have to do it...

 

[cheap90gsx]

i thought EGR was to reduce unwanted emissions from the combustion? as far as i know it's to reduce emissions. also, blocking the egr can be very effective at keeping your intake manifold clean. which is enough for me to get rid of it. theoretically EGR would increase intake temps because hot gasses are flowing directly to the intake mani.

 

[DSM_Nick]

It'll boost your combustion temps and reduce engine life while netting no gain in performance.

It will boost your intake temperature an insignificant amount, but as this says....if you remove it you will have higher combustion temps. Not to mention other downsides. It doesn't effect you under any amount of load really. Read the other threads on this topic for more....

 

[Defiant]

Yet again:
Technical Mysteries Unraveled

When EGR was first introduced and the Feds required that all cars be retrofitted -and this in the days of carburetors- the kits (sold by STP) had a nasty job of not working right, and incinerating exhaust valves. Those days, along with those of leaded gasoline, which was a primary cause of combustion chamber deposits, are long gone. Refer to Post #2, or any other EGR thread on this site.

 

[DSM_Nick]

Thanks, I wasn't sure how to explain it. That thread helped a lot

 

[Bud92gsx]

Yeah, thanks for all the info on the EGR guys!!!!You really gave me alot of useful information...Thanks again...

 

[Bud92gsx]

I still don't think I will block it off.. WIth all of the stuff I've heard from these guys on why it's bad..