Installed EGR...Interesting Effect on EGT
- Thread starter jdub
- Start date
Good info :bigthumb:
I shared your info on a thread of SF - http://www.supraforums.com/forum/showthread.php?t=389759
I shared your info on a thread of SF - http://www.supraforums.com/forum/showthread.php?t=389759
yeah iirc, egr works at idle and cruise and closes (not workin) at wot, and has no effect on horse power out put, but does have an effect on nox, and emisisons. and will not affect the afr either. since the exhaust gas doesn't reburn, it's cools the temps and takes up space in the combustion chamber
my motor didn't have it and i decided i wanted a cleaner lookin bay any ways.. jdm motor .. i do have one that was off my n/a that i might consider putting on, just for the simple fact i've toasted a bosch wide band allready. and depending on driving condtions some (hot days or low coolent) my w/b indicator light will flash the over heating code.
:ugh2:so big thumbs up to have a reason to keep the egr!
my motor didn't have it and i decided i wanted a cleaner lookin bay any ways.. jdm motor .. i do have one that was off my n/a that i might consider putting on, just for the simple fact i've toasted a bosch wide band allready. and depending on driving condtions some (hot days or low coolent) my w/b indicator light will flash the over heating code.
:ugh2:so big thumbs up to have a reason to keep the egr!
EGR delete=BHG booster. Thanks for the hard data, to show them what Toyota has been saying all along.
89jdm7m said:makes sense... then i guess egr goes back on, next time the engine's out
Yeah...I'll tell ya, installing the EGR with the motor in the car is a real PITA. My hands are def showing the "battle scars" from putting the damn thing in.
I'm going to run this as is for the next couple weeks to see if there is any change...if there is, I'll post it!
didn't even know about it... i'm actually living in va beach now though, for collegeSquid699 said:
mmm... not trying to start anything....lagged said:dont post if you dont know
honestly, i'm not going to "know" if i don't post; secondly, http://www.jazzproparts.com/ProductDetails.asp?ProductCode=7MGTE&Show=TechSpecs this page specifically states "240 hp" and this is the company that i bought my motor from ($975 at the time)
and to sum it all up... i clearly stated "rumored" and "assumption" hoping for friendly, positive, and constructive input on my comment, pretty much i wanted to find out if i had been lied to, and thanks to shaef for simply stating "rumor, my friend" that's all that needed to be said :icon_neut
awesome... you've got a new member... hope to see you guys aroundSquid699 said:
i need to gets some suspension upgrades :cry: (assuming ya'll do mountain runs)
IJ. said:Ummm dunno which dyno you use but mine works at part throttle as well
please correct me if iam wrong, but i was under the impression that you are only most likely to detonate under high loads, when the EGR is closed anyway?
Part throttle is usually a leaner AF and can rattle a motor quite badly if you're going up hill.
I'm not being an ass here just trying to understand the relationship between reports of EGR removal and Rattle as we don't have the EGR stuff here at all!
I'm not being an ass here just trying to understand the relationship between reports of EGR removal and Rattle as we don't have the EGR stuff here at all!
Good info! ......now I have to find out how critical this is, seeing as I'm running a FFIM with no room for the EGR to go back in......under boost I see about 1400*F pre turbo.
EGR and water injection do the same thing. From what I've read, both were developed for aircraft running very high compression ratios, like 14:1. Because the fuel couldn't keep up, something had to be done to reduce the combustion temperature and detonation. Both methods do that. A side effect was lower NOx, since they didn't care about emissions at the time. Remember, this is somewhere around 1940. Jetjock was right about that.
Remember what creates NOx: high combustion temperature. It's created because high temperatures rip the N2 apart into N+ which then latches onto oxygen, 'cause everybody loves oxygen. If we reduce the temperature, there's less ripping apart of N2.
One major advantage of EGR is there's no water bottle to refill.
Everybody wants EGR or the "magical" water injection to add power, or thinks that EGR is bad. What they get you is the ability to run higher compression ratios (or boost) on lower octane fuel. If you add either to an engine without changing anything else, you will lose power. You have to increase the boost or CR at the same time. It's all one big system with everything related. If you delete the EGR without telling the computer, the system won't work as well.
Just my 0.02. YMMV, etc.
Asterix
Remember what creates NOx: high combustion temperature. It's created because high temperatures rip the N2 apart into N+ which then latches onto oxygen, 'cause everybody loves oxygen. If we reduce the temperature, there's less ripping apart of N2.
One major advantage of EGR is there's no water bottle to refill.
Everybody wants EGR or the "magical" water injection to add power, or thinks that EGR is bad. What they get you is the ability to run higher compression ratios (or boost) on lower octane fuel. If you add either to an engine without changing anything else, you will lose power. You have to increase the boost or CR at the same time. It's all one big system with everything related. If you delete the EGR without telling the computer, the system won't work as well.
Just my 0.02. YMMV, etc.
Asterix
IJ. said:
i would think it would then come down to if there is a difference in jap ECUs to "compensate" for the lack of the EGR?
but again, since it normally functions during part throttle the computer is still able to make adjustments to the fuel trim based off of the o2 sensor.
please understand, i am only basing my thoughts off of my limited understanding of the system.
why i dont think that lack of the EGR would cause problems, is simply because jap cars dont have them.
and for future reference i believe the 240 #'s come from the japanese measurement system for hp which is PS
so it's 240ps
230bhp for 86-88
232bhp for 89-92
and i'm sure jeff lange could have a look and see if usdm and jdm ecu's for the same year have the same part numbers, that would soon eliminate or confirm the ecu theory
so it's 240ps
230bhp for 86-88
232bhp for 89-92
and i'm sure jeff lange could have a look and see if usdm and jdm ecu's for the same year have the same part numbers, that would soon eliminate or confirm the ecu theory
Follow-up on this:
After no ECU re-sets for 2-3 weeks, my EGT remained stable at the figures in the 1st post. The motor is def keeping EGT at the lower numbers since I installed the EGR.
I had other issues crop up that were unrelated and have fixed....including jumping a timing belt tooth that I caught due to higher EGT readings on my gauge. If you've read my ATI Damper thread, that was fixed a couple of days ago.
I also passed AZ emissions with flying colors yesterday...afterward, I switched ECUs to troubleshoot a low idle problem. Until I did the timing belt/ATI damper install, the ECU was never re-set. The new ECU is also keeping the EGT down in the same range as my previous post.
After no ECU re-sets for 2-3 weeks, my EGT remained stable at the figures in the 1st post. The motor is def keeping EGT at the lower numbers since I installed the EGR.
I had other issues crop up that were unrelated and have fixed....including jumping a timing belt tooth that I caught due to higher EGT readings on my gauge. If you've read my ATI Damper thread, that was fixed a couple of days ago.
I also passed AZ emissions with flying colors yesterday...afterward, I switched ECUs to troubleshoot a low idle problem. Until I did the timing belt/ATI damper install, the ECU was never re-set. The new ECU is also keeping the EGT down in the same range as my previous post.
US cars with EGR have a different program in the ECU. The tables for spark timing and injection pulse width are different when the EGR command is given.IJ said:
suprra_girl said:and for future reference i believe the 240 #'s come from the japanese measurement system for hp which is PS
so it's 240ps
230bhp for 86-88
232bhp for 89-92
and i'm sure jeff lange could have a look and see if usdm and jdm ecu's for the same year have the same part numbers, that would soon eliminate or confirm the ecu theory
240ps = 236.7167922757141hp
just wanted to let you know.