Need facts! I'm rebuilding a motor for my renix and I'd love to delete that EGR crap..Yes emissions and yaddayadda..let me finish!
I'm using a Renix era block and HO head for my 88..Anyway from what I'm reading on Wikipedia and off jeepstrokers, the HO cam was the main change in deleting the EGR in the HO's. It also states that computer altering was involved though it doesn't stat exactly what "computer altering is".
So in short you could say no. But will using a HO cam in my renix be enough to delete the EGR? Anything I could add or change to delete it without doing a HO computer or something?
I've read if you delete it that it'll raise engine temps and someone had a scientific reason why but then again I don't know if or how true it was. Any facts or proof on this? I can run a lower t-stat and electric fans is thats the only issue. I'm tried of the EGR and how nasty it gunks up the intake manifold..also it heats up the damn intake which sucks as well from a performance standpoint, as well as fuel economy..

I have a 96 complete intake manfiold with a complete throttle body & sensors. I'd like to use it and a HO exhaust manifold. I plan to delete the EGR but weld a bung to the exhaust with no opening and then tap the manifold..So basically I'll have a fake EGR setup. It'll all be there and look correct & looks like its working but it doesn't actually go into the exhaust or intake lol..just setup like it would..So I'll pass visual inspection just fine! And hopefully with the HO cam I'll pass the sniffer test as long as everything is in order! If it doesn't pass..well theres ways around that to..I'd hate to go that route but the EGR is getting left behind with this motor rebuild!
I need help on deleting the EGR guys. One way or another its getting taken off, I just need to know what that cause problem wise & how to correct it.

 

Come on guys I know your looking but give some facts or advice...From what I'm seeing everyone says EGR delete is a big no no...but then people are saying they deleted it and are not having issues.
I know smog and inspection is a problem to be worried about. But I'll pass visual just fine with what I'm doing with the fake EGR setup. As far as the sniffer test, who knows but I can deal with that! I will be running a cat and everything, just no EGR so I don't see an issue with passing!

 

Using a lower temp thermostat does not necessarily lower engine temps in the long run.

It will, however, increase emissions and lower power and gas mileage.

As to the EGR question, why go to all that trouble and obsess about it? I don't think any possible gain, if any, is worth all the work.

 

Well lets explain why I'm deleting it?
1 it makes the intake manifold filthy.
2 is reheats the cold intake air
3 the EGR valve is almost 100 dollars when it goes out..which I've learned it does just about every 2 years.
And a lower thermostat will not nessasarily lower performance...running a 185 vs a 195 will actually help me since I'm in cali and run around 210 all the time..I think 190-200 is a safe temp from a performance & reliablity stand point! I know these things just run hot and like it that way, but I'm sure that at 190-200 it'll be even happier! Heat soak is a performance killer!
Sure these things are greatly reliable now but it can always be upgraded and made better! Thats another conversation though!
It may/may not raise emmisions but thats to be tested..it can be said both ways when you think of it.! It can lower intake chamber temps & such..as long as its not too cold its not a issue and is actually better if its used for the correct reasons.

But I've answered most of my own questions after some hard digging...
84-95 used the same cam..only 96-01 had the revised cam. And from what I've seen the 84-95 cam is bigger but the 96-01 cam will bring the power on sooner. So I'll be using the earlier "bigger" cam.
As far as EGR deleting only issue is emissions. Visual and sniffer test. With the EGR you reburn some unburnt fuel (so they say) for cleaner emissions! Do I believe it? In theory yes but I don't think it actually helps..does more good then bad the way I see it!
So I'll be doing my HO head, welding a bung & tapping the manifold..But it won't actually be connected...Weld the bung to the header, but there will be no hole..just a bung and when tapping the manifold I'll make sure to not "punch through" the manifold..so its there but litteraly not connected! That'll get me to pass visual just fine! If I run hotter, I'll run a lower t-stat..simple enough...
My header is cracked right now..just welded it shut..It'll open back up sooner or later, which means I need a new one! Well if I'm gonna buy one why not buy a HO header instead of our log manifold? The HO manifold is a tube header and way better than our log manifold, even in stock form..Gaining power and efficiency right there. I've got the newer 99+ intake manifold already lol. Gains can be had everyone on a Renix! I love renix for its simplicity and will not get a HO!
Again I only want to do this because I have the HO intake manifold already, complete with throttle body and every sensor needed!
The HO head was designed better than my Renix head...another efficiency gain right there, as well as performance..I don't think I'm headed in the wrong direction, just needed the facts about doing what I'm doing!

I just build a lexus is300 with a 2JZ thats now making 701whp and hasn't had a hiccup yet. I'm 19 but know a damn alot about motors and how things work! The EGR is doing more bad than good and is exactly why the HO's didn't get the EGR setup!

 

So let this be the thread to end all the discussion of the EGR delete!

Yes it can be done without any I'll side effects, other than maybe running a little hotter which has been said will happen. But a lower temp t-stat should fix that issue and I'm not 100% certain it'll even happen...someone posted scientific facts about it, and it made since how he said it! But I don't know 100% yet! I'll reply back tomorrow when I find out!
The renix era cam is the same as the 91-95 HO cam..so 84-95 has the same & 96-01 has the revised cam which is smaller but brings on power sooner in the RPM's but falls off quicker as well. The 84-95 cam will bring it on later in the RPM's but also hold out longer as well!
If you have to deal with emmisions, plug the damn thing and never worry again! Or do as I'm doing and do a HO head/intake/header swap and weld it up but not actually connect it..basically a fake EGR!
So it will pass visual and I'm almost certain it'll pass the sniffer as well! My EGR is so gunk and you can't even blow through it, so I'm sure it doesn't work anyway and I still passed! But I have to say it, so it is a very very very very slight possiblity that it can fail for not having a EGR since it is a emission control unit....I highly doubt you'll fail as long as you've got a good cat though!

Cons:
possibly running hotter

Pros:
No more gunk in the intake manifold from it, or injectors..my injectors were burnt black on the backside of the tip..on the EGR side. I think it was cooking them!
Never have to buy another EGR valve again
One less thing to worry about
Cooler air intake charge, since your EGR won't be circulating hot exhaust into it!
More power because cooler intake temps, as well as cooler fuel since it won't be heated by the hot exhaust!
Possible chance better fuel economy from the cleaner & colder intake and injectors!

So its going bye bye...Chrysler did away with it in the 91 for a reason and I intend to follow..

Any ill effects will be posted! This info will be 100% accurate and I will not lie or exaggerate any info stated here! I want this to be the end of all the questions about the EGR delete!

 

Cams are the same Renix to HO through about 96 as already stated.

I have done what you're talking about. Twice. There are no negatives at all.

 

Confirmation from one..I just want this **** off my new fresh motor thats in the works..no way will I have it gunking up my new one!
So BYE BYE EGR!

 

There is no ill side affects from deleting you EGR. Though, an EGR on a gas engine should nit gunk up an intake as you have stsed unless something else is wrong, and by the use of an EGR, it actually helps keep the engine slightly cooler at cruise, here is how. Exhaust gas is inert, meaning it won't burn. By introducing small amounts of exhaust gas back into the engine the combustion chamber temps will drop because of the inert gas in them, this in turn lower Oxides of Nitrogen emissions, allows the ECM to advance timing, and help control spark knock. The EGR only works under light cruise conditions, you will not gain any power from deleting it.

 

Mines built up with carbon..I knew there was an explanation for why it made it run cooler just didn't know how to explain it..
As far as gaining power I think it'll be gained because or lower temps...colder air = denser air = more power.
So I do believe theres power to be had...is it much no? Is it there..yes.

 

The Hp gain will only be during cruise, not during WOT or when you mash on the gas, just cruise, and at cruise you are talking about maybe 2 hp..., and an egr will only carbon an intake if you are having running problems i.e. running rich, missfiring.

 

Sorry guy but it looks like you need to find out your facts first , right now you dont seem to have a clue, and as far as switching cams do some work like search ing for the bearing sizes to see if it will even work like you want.

 

Technically emissions deletes are illegal.

This is dangerous territory...

 

Won't pass the california emissions visual and functions test.

 

Ya with the way my jeep was treated I'm not surprised it was like this! I just thought they all blew carbon in the intake..first renix so I never seen it before! And thank you for explaining that it only works at part throttle. I didn't know that!
As far as being risky business with what I'm doing yes I totally understand!
As far as passing visual....did you even read what I wrote? I'd have the EGR all put together like its there, just not hooked up...it'll pass visual just fine..and I honestly believe it'll pass the sniffer as well...You must missed of the part where I said my EGR tube is completely plugged, so theres no way anything can flow through. Its doing nothing right now and I still passed just fine.!

 

Umm cams can be swapped from any 1975+ AMC/jeep straight six..Fairly sure on that as well as its been posted many times! Modfications maybe required but it is possible!
Swapping in the cam from the 96-01 wouldn't be an issue either..and since I'm doing a complete rebuild, if there was a bearing size issue...I'd be taken care of! But theres not so its not an issue!
And I have a very damn good clue about what I'm doing, thats why I'm doing it!

I'll have my EGR bungs welded shut today and see what happens! I bet my jeep runs just fine