As we all know, there isn't enough room to add the EGR valve to the intake because of the distributor.

What about adding a remote EGR. John, I stole a pic on your website to show how it could be done, I hope you don't mind. Basicly all you do is drill into the side of the intake where the two ports are for the egr. A steel/copper/whatever pipe goes into the holes. The other end of the pipe attaches to a baseplate and the EGR valve mounts to the baseplate. It seems pretty simple to me.

The only thing I am not sure about are the heads. Is there a port in the heads that the intake needs to be connected to? Does the intake fit all the nessecary parts on the heads, but the EGR valve can't be used? If that is the case then I don't see why my idea can't/won't work.

Thoughts, comments, questions please!!

 

It would help if I attached the pic!!

 

If you run heads that have the egr port, then you will already have the egr function always on. It pumps exhaust into the engine and then into the PCV valve and into the intake, then into the combustion chamber.
By default, the LT1 intake with a non-LT1 head always has the EGR effect even with the block off plates in the rear. There is no need to run two EGR systems.
J

 

What junkcltr means as we're finding out, is that the intake does not fully cover the egr passages in the head (if it exists), thus exaust is entering into the block.

Here's a pic:


This is not a particularly good idea.

To do your own, you'd need to connect the egr passage in the head to the passage in the intake. Not sure how you'd do that. One idea is to block the heads and take it off the exaust manifold/header.

 

Not all heads have an EGR port as big as that stock hole in the gasket of the above picture. TF heads have a small 1/2" hole. Some heads don't even have EGR!

 

That is true. But the part that seals has no intake backing it. Only heads without any type of EGR hole will seal. Or the EGR hole in the heads needs to be blocked. Just weld a piece of angle alum. to the intake....problem solved.
J

 

Hmmmm...

So, If I built up the area on the intake to the head and then somehow routed the gases I would be ok.

It seems like it could be more trouble than it's worth. My fear is failing emissions. Here I was thinking that the only reason the EGR wouldn't work is because the valve had to be taken away.

From the looks of the pic RCR put up, there are no exhaust gas ports on the LT1. I assume that the TPI manifold takes the gas from the 2 ports on the heads in the middle, merges them, and the valve controls wether or not the gas goes into the intake. If there are no exhaust ports on the heads, how does the exhaust get to the intake?!!

 

Sure about that?

 

the lt1 used a remote stainless steel tube from the exhaust manifold to route egr gas to the intake. Its probably not a good idea to route exhaust gases into the lifter valley, and then have it drawn into the intake from the PCV. think of how your intake looks inside(all black from carbon), that now gets dumped into your lifters/valley. the best solution is to use a gasket that has no egr hole(if you have the egr ports), and fill in the back of the manifold with weld(Not easy!). Or maybe you could split the intake gasket in the middle, and install an aluminum or steel plate over the egr hole and RTV it in place, the plate would have to have the same thickness as the gasket. The plate would work for any egr hole, regardless of size, and if you make it with the bolt hole pattern, it won't move around any. That might be a good idea for part of the manifold kit for John, since that would cover every application. What do you guys think?

 

My heads have the small holes, so if I go back in, I'm filling them with Ultra Copper RTV. Works great on my header gaskets.

 

Oh please...

Yeah, in principal thats true, exhuast gas is finding its way into the combustion process if you have a uncoverd EGR port in the head.


But COME ON. thats about the most ******* hilljack Way of doing it i have ever heard of.

There are so Many problems with that "solution" I don't even know where to start...


Just to name the Two Most Glaring..

1.) Exhuast gas isnt particuarly good for your oil, Ask Vader to elucidate on that One. Having it actively cylcling through your crankcase in such large quanities is a good way to Lunch your bearings.

2.) Its absolutely Uncontrolled. You have an Unmetered amount of Exhuast gas pouring into your crankcase, and eventually out the breather and In through your PCV, at ALL TIMES.

Incase you wernt not aware, the EGR is only active at select times. Not including WOT, Idle, and (i think) deceleration. Having this uncontrolled source of exhuast gasses added to combustion in no way emulates a functioning EGR Valve.

I hate to see crap like this spread acrost this board. People come here for answers, and Its important that the information put Up here is Correct. Answers like that Mislead People who Do not know any better, and set them off on the wrong track.

 

You have got to be joking. You really took that serious?? If you buy that, I have a bridge to sell you. I was just saying that there is an even larger problem than worrying about the EGR function.
J

 

Lots of people read here and some may have took you seriously. There was no referance to being a joke anywhere in that reply.

 

If you would like to have the EGR function as it normally would here my 2 cents.

First run a steel pipe, to a bung welded to the pass side header. run that into an aluminum block drilled to mount an EGR valve and tapped for 2, 3/8 pipe to AN fittings (in / out) Use the same fitting on the header. Run a second pipe from the aluminum block (EGR out) to the original feed on the right side of the intake. Attach with another pipe to AN fitting. Cut a slot between the upper and lower hole on the left opening to feed exhaust into the intake and cap it per John's instructions. Finally fill, cap, weld the holes in the heads to seal correctly. In theory this should return the EGR to nornal function, just have to find a good place to mount the block and valve. With some work this could be done. cheers, Bob

 

Good, I would have thought from your other posts, you were Smarter than that.


But yeah, Like John Said, even tho to Some of us that is an obvious joke( not me this time, but hey), some poor kid right now is off telling his friends how you don't need to use a EGR w/ the LT1 intake on a SBC cause of the reason you described, and all his friends are thinking he is a ****ing dip****.

Be careful out there

 

I hear you guys. I will try to be more careful about what I say.
J