ArdWrknTrk Posted February 21 Share Posted February 21 Darn good info Jim. CJ I have my moments.... I see that all the 300 EGR's are kinda offset. I need to find one of those with a bleed down, and a good number for an inline vacuum valve like on my truck. (but I no longer have ANY ewissions equipment, so I gotta go digging) Link to comment Share on other sites More sharing options...
C.Jett Posted February 21 Author Share Posted February 21 I have my moments.... I see that all the 300 EGR's are kinda offset. I need to find one of those with a bleed down, and a good number for an inline vacuum valve like on my truck. (but I no longer have ANY ewissions equipment, so I gotta go digging) The FTE thread says egr need cats to work, I have none. Were cats used before egr’s or vice-versa or what? Am I chasing a unicorn ? CJ Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 21 Share Posted February 21 The FTE thread says egr need cats to work, I have none. Were cats used before egr’s or vice-versa or what? Am I chasing a unicorn ? CJ EGR needs some back pressure to work.... Do you have a muffler on your truck, CJ? Link to comment Share on other sites More sharing options...
mat in tn Posted February 22 Share Posted February 22 EGR needs some back pressure to work.... Do you have a muffler on your truck, CJ? yes, the egr needs a pressure differential. in the natural environment of an internal combustion engine, you will have both intake vacuum and exhaust pressure. either of these will induce egr flow. higher vacuum, greater exhaust pressure will induce the most of course. there is a fine line between starving the combustion of fuel and oxygen vs being totally ineffective. these are calibrated as part of the designed tune even if a little generalized for mass production. egr is NOT needed for an engine to run or even run great but it can reduce stresses inside the engine to extend its life. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 22 Share Posted February 22 yes, the egr needs a pressure differential. in the natural environment of an internal combustion engine, you will have both intake vacuum and exhaust pressure. either of these will induce egr flow. higher vacuum, greater exhaust pressure will induce the most of course. there is a fine line between starving the combustion of fuel and oxygen vs being totally ineffective. these are calibrated as part of the designed tune even if a little generalized for mass production. egr is NOT needed for an engine to run or even run great but it can reduce stresses inside the engine to extend its life. It definitely allows more advance, which generally= performance -&- economy. (The title of a great Vizard book!) Link to comment Share on other sites More sharing options...
C.Jett Posted February 22 Author Share Posted February 22 EGR needs some back pressure to work.... Do you have a muffler on your truck, CJ? Soon as I can find a bearing to go in it. Will muffler be enough to work egr? CJ Link to comment Share on other sites More sharing options...
C.Jett Posted February 22 Author Share Posted February 22 yes, the egr needs a pressure differential. in the natural environment of an internal combustion engine, you will have both intake vacuum and exhaust pressure. either of these will induce egr flow. higher vacuum, greater exhaust pressure will induce the most of course. there is a fine line between starving the combustion of fuel and oxygen vs being totally ineffective. these are calibrated as part of the designed tune even if a little generalized for mass production. egr is NOT needed for an engine to run or even run great but it can reduce stresses inside the engine to extend its life. Thanks Matt, see post to Jim. CJ Link to comment Share on other sites More sharing options...
mat in tn Posted February 22 Share Posted February 22 Thanks Matt, see post to Jim. CJ muffler should do it along with a full-length exhaust. especially if you are using the factory style canister. Link to comment Share on other sites More sharing options...
C.Jett Posted February 22 Author Share Posted February 22 muffler should do it along with a full-length exhaust. especially if you are using the factory style canister. Thanks Matt, canister? As in muffler? CJ Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 22 Share Posted February 22 Thanks Matt, canister? As in muffler? CJ CJ, I think the trick is choosing one of the 5 different EGR valves to work with the tune of your aftermarket carburetor. I don't have any info on which ones flow what amount of exhaust .. Maybe Bill or Gary has some insight??? Link to comment Share on other sites More sharing options...
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