Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 02-16-2010, 12:07 AM   #1
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default Egr Removal

Im replacing the head gasket on my 90 7mge and would like to remove the egr but don't know if it will kick the cel on. The car is from PA and not a Cali car. Also i want to know if it is a bad idea or not. It would be nice just to clean up the engine bay a little
907mge is offline   Reply With Quote
Old 02-16-2010, 12:14 AM   #2
supra.7mgte
Intake
 
Join Date: Feb 2010
Location: Alberta
Posts: 36
supra.7mgte is on a distinguished road
Default

shouldnt have a problem but there are some vacuum lines that you will need to plugged off. and a couple of block off plates made to the egr vavle on the head and the intake... i would tell u what your car my run like after u remove it but i have yet to get my to start due to no spark
supra.7mgte is offline   Reply With Quote
Old 02-16-2010, 12:34 AM   #3
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

It's a stupid move given how the kick you'll see in combustion chamber temps, reduction in spark advance and reduced mileage... but, if you must you should source a JDM ECU, it's tuned to run richer and with less spark advance to compensate for the higher engine temps.

And, no, deleting the EGR will not cause any diagnostic codes in any 7M model except for the California spec ECU.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 02-16-2010, 12:41 AM   #4
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

im curious of how it reduces combustion temps and where does the exhaust come from?
907mge is offline   Reply With Quote
Old 02-16-2010, 01:12 AM   #5
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

I don't understand your question...

Exhaust gasses come from the exhaust side of the head, run through the EGR cooler and then through the modulator valve into the intake.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 02-16-2010, 01:51 AM   #6
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

i mean how does hot exhaust lower the temperture of combustion?
907mge is offline   Reply With Quote
Old 02-16-2010, 02:12 AM   #7
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

Because exhaust gas is a LOT colder than burning fuel perhaps?

Here's the simple version: After the fuel mixture is burned a MASSIVE amount of energy is transferred as heat and kinetic energy, the rate at which exhaust cools after the combustion process is very fast, then the small portion which is rerouted is run through a cooler at the back of the head where the temps are pulled down even further. The gas which remains, while hotter than the fresh air coming in (usually) is also inert meaning it doesn't burn when the next combustion cycle occurs... less burning mass less heat. less heat, less knock. less knock, the more timing advance possible. more timing advance, more power per a given amount of fuel. In the end there may be a *tiny* reduction in power, but only at certain points in the operation of the engine. and we're talking MAYBE 5HP... maybe.

I don't know why you're so worried about it other than "it doesn't look purdy"... I'm pretty sure that on the 7M-GE the system isn't even active when you've got it floored.

BTW, did you know this is how Honda get's such crazy good mileage out of their cars and is able to run their engines on fuel mixtures as lean as 60:1?
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 02-16-2010, 02:20 AM   #8
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

that you for the explanation i'm still learning about the different systems
907mge is offline   Reply With Quote
Old 02-16-2010, 02:23 AM   #9
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

No problem, if you're not sure ask.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 03-02-2010, 12:45 AM   #10
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

After seeing the head and intake apart i see where the exhaust gas comes from, going from the back cylinder to the y pipe. What i also noticed is the huge amount of carbon in the intake. Isn't that bad for air flow?
907mge is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
engine removal mizuboi MKIII Supra 11 06-10-2011 07:25 AM
Starter Removal question OkieRA29 MKIII Supra 13 05-11-2010 01:08 AM
86.5 auto transmission removal HELP!!! elmer MKIII Supra 13 04-06-2010 11:41 PM
Alternator belt removal and installation! ~*B Magical*~ MKIII Supra 11 03-13-2008 07:27 PM
Is this true? Fuse removal can change limiter jdbones Non-Generation Specific Questions 0 12-30-2007 10:31 AM


All times are GMT. The time now is 09:48 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86