I'm now trying to fiqure out what heads and intake to put on my 383. Its gonna be a 4bolt splayed 11.4-1 comppresion flat top, with some cam. Now there are two ways i see for me. Before this engine goes in i will start burning my own proms .

1- Use my vortec heads that came with the engine, valve job, new springs and what not. Use my stock ported plenum and tb with siamesed runners and vortech base. RETAINS EGR

2-get a pair of sportsman 2 heads and get lt1 intake (which i really want to get) but then i lose my egr because of the distributor in the back.

Now the first one would almost pass would flying colors on the dyno for emssions, but what about the second option? Is it possible to remove the egr on a prom and still pass emissions? I will probaly leave the smog air pump on the headers and cat. I really would think it would if its tuned correctly and the computer won't look for a reading if its turned off

Sorry for the long post its just its a big fork in the road for my engine......

 

Either get screw in studs or drill and pin the existing studs
If you are going with new heads, go with Trickflow or AFR's. The alumnium heads will really help with detonation in a high compression engine.
Yes it will. If as you say you tune it right and use the right cam. With the right cam the EGR function will be handled internally via valve overlap.

 

I passed the IM240 dyno test with 2 more cylinders than I'm supposed to have and no EGR.

If you tune the EGR out then you'll be fine.

 

This may be a stupid question to you guys but I have not got my prom burning equipment yet. What exactly do you do with the prom to disable EGR? Is it just turning off a flag or somthing else simple? I will be getting a LT1 intake,heads and cam after I get the hang off eprom tuning and I'm just trying to learn a little ahead of time.

 

Turn the EGR enable temp to $FE. Turn all the EGR spark advance to 0. Then I flattend out the EGR VE comp table by making all the numbers equal to my BPW (don't have to do this one but I did anyway).

 

This brings up an interesting point for me. When I start my car up in the morning, I will get an immediate ERG code. Its 34 I think. I am using the ARAP.bin. I thought that the EGR was turned off essentially in this .bin??? It only happens on the first startup of the day or if I leave it sit and completely cool back off.

If not, then I guess I'll turn the EGR stuff to 0. (But I thought that since they were all set to 255 in the table it was turned off??)

 

I had the same thing with the AWBT bin I was using before, running ARAP now without a problem. The code 34 on first cold start is bogus, that code is set when the ECM requests EGR and isn't getting the feedback signal, which it can't get because the engine is cold. Also the ECM shouldn't be requesting EGR on a cold engine at idle, senile computer is my guess.

 

FAWK! Now where is my buddy.... need a new 165... Hell why not switch to SD lol.

Am I correct that when all settings in the EGR table are set to 255 that it is effectively turned off( all set to 255 except the bottom most line)? I also noticed a sound like a lifter tapping or perhaps a rocker arm that has come loose. Could somthing like that cause an erroneous EGR code?

 

Not sure on the 255's but I would think it is effectivly turned off since it is set for numbers it will never see.

Lifter or rocker setting an EGR code? Doubtful, they could possibly affect spark knock, but I don't see how that could ever affect EGR.