Ray_R Posted February 29, 2004 Report Share Posted February 29, 2004 was wondering if its worth making the egr functional on the magna mpi. i noticed its aimed towards the 3rd and 4th runner. any thoughts on this? Link to comment Share on other sites More sharing options...
Indiana Posted February 29, 2004 Report Share Posted February 29, 2004 guess something like that depends on your emissions testings and whether or not you even have them, if not I suggest you get a friend to give you an address and go register your car somewhere else Link to comment Share on other sites More sharing options...
Ray_R Posted February 29, 2004 Author Report Share Posted February 29, 2004 emissions is not a problem here, i know that the egr can reduce combustion temps and its location by the #3 and 4 intake runner makes me think that mitsu was trying to compensate for something. just wondering if anyone threw this idea around. it looks like the stock tbi unit will fit on the magna. Link to comment Share on other sites More sharing options...
Boosted_One Posted February 29, 2004 Report Share Posted February 29, 2004 Ray....no emissions don't bother with the EGR. Your actually pumping crud back into the motor so that offsets the small temp change IMHO. Just my opinion of course! Link to comment Share on other sites More sharing options...
Ray_R Posted February 29, 2004 Author Report Share Posted February 29, 2004 your opinion is much respected by me mike im thinking about having chad remove it for me among other things. do you think that thing is acting as a brace, between the runners, or would it be better to completly remove it? Link to comment Share on other sites More sharing options...
indy_85stariones Posted March 2, 2004 Report Share Posted March 2, 2004 How would someone go about making EGR work on Magna intake? I am looking at MPI fuel section my 1993 Accord Service Manual. 1) ECU opens the EGR Solenoid under specific operating conditions 2) Vacuum from TB passes thru open EGR Solenoid 3) Vacumm opens EGR valve 4) ECU compares reading from EGR valve lift sensor 5) ECU opens/closes EGR Solenoid based upon EGR valve lift sensor Do aftermarket EFI systems have features that could open/close a EGR Solenoid? How did the old carburated EGR valve know when to open and close? My guess is that there was a strong spring in EGR valve. Intake manifold vacuum is the strongest at idle. When intake manifold vacuum is strong enough (say 12 psi), it would open the spring in EGR valve. Link to comment Share on other sites More sharing options...
mikec Posted March 2, 2004 Report Share Posted March 2, 2004 On carb'ed cars the EGR is driven by ported vacuum from the carb. Â Ported vacuum comes from a specially located tap in the throttle plate area: Picture totally closed throttle plates... if you "tap" the vacuum just below the plates you'll get high manifold vacuum. Â If you "tap" just above the plates you'll get no vacuum at idle... but once the throttle opens a little bit you'll have vacuum. Â At wide open throttle there is again no (almost none anyway) vacuum. Â This type of port is used to drive EGR valves and other emissions things. Â This way they are off at idle (when the engine is having enough trouble just staying running) but they work at part-throttle (cruise) and are off again at max-throttle ==> the engine is allowed to generate max power. StarQuests have ported vacuum as well. Â The first two ports basically are ported; the third port (closest to firewall) is manifold vacuum. EGR is generally driven: * at part-throttle cruise... via ported vacuum. * when the engine is warmed up... this is what the ECU controlled solenoids do. mike c. Link to comment Share on other sites More sharing options...
cudabnu Posted March 2, 2004 Report Share Posted March 2, 2004 I'm looking into using the mustang EGR plate as well as the throttlebody to try tp pass California Emissions Link to comment Share on other sites More sharing options...
Vanishing Point Posted March 2, 2004 Report Share Posted March 2, 2004 Ive been out of the loop for a while but can or do they check for NOx now when they do emission testing. It use to be just HC and CO. If NOx is not checked for then there is no need for EGR, except back in the day it would help with spark knock. I would imagine thats not a problem with a programable fuel system, just add alittle more fuel after the test is ran. Link to comment Share on other sites More sharing options...
Ray_R Posted March 2, 2004 Author Report Share Posted March 2, 2004 sounds like its would be more of a hassle to try to get it working properly with an aftermarket management system. much easyer to do without it ;D thanks for all the input guys... Link to comment Share on other sites More sharing options...
Vanishing Point Posted March 3, 2004 Report Share Posted March 3, 2004 Indy, The carb cars had a thermostatic valve that turned ported vacum on to the egr when you reach temp. There was some kind of back pressure valve inline also. Im with ray good ridance. Link to comment Share on other sites More sharing options...
Ray_R Posted March 4, 2004 Author Report Share Posted March 4, 2004 yes i just found out that part of the egr port going to the plenum was already blocked off. off it goes... Link to comment Share on other sites More sharing options...
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