My tuning experience: Why TGV and EGR deletes are a must - Page 2

The Fan · 04-11-2016, 01:18 PM

What are the down sides of any to having tgv/egr deletes if any?

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rufus819 · 04-11-2016, 01:23 PM

you can kiss your warranty goodbye. You'll experience a little rougher and higher idle as a result but it's nothing to be alarmed about.

kakwvu · 04-11-2016, 01:46 PM

Quote:

Originally Posted by The Fan

What are the down sides of any to having tgv/egr deletes if any?

Warranty claim denials. Not sure how it will affect your registration in California (I'm plated in another state).

The upside is more power, and less garbage free flowing through your engine.

SubieRX15 · 04-11-2016, 02:20 PM

Thanks for the great info. Are any of you guys running the P&L motorsports TGV housing and upper TGV deletes?

rufus819 · 04-11-2016, 02:30 PM

I'm running the TiC TGV Deletes and the IAG EGR delete. I got them off a local facebook group for $120 combined.

TheSilentCircus · 04-11-2016, 03:14 PM

Quote:

Originally Posted by rufus819

You'll experience a little rougher and higher idle as a result but it's nothing to be alarmed about.

My idle is completely the same as it was prior and not rough at all, could be attributed to weather though? Cause Southern California don't care about Winter.

tbmd · 04-11-2016, 09:16 PM

Quote:

Originally Posted by TheSilentCircus

My idle is completely the same as it was prior and not rough at all, could be attributed to weather though? Cause Southern California don't care about Winter.

+1 No difference for me either.

tyler37075 · 04-11-2016, 09:51 PM

I don't want to blow this thread up but I just have to speak from my experience after reading this. I went from stock to a Bren etune with tgvs 3 port ebcs and a killer b j pipe and killed b catted I pipe. I was not really impressed with my car until I added an Ets 3" quiet catback. A lot of people say a cat back doesn't make a lot of difference but it really woke my car up with the mods I already had. Since then I have added egr deletes, a grimmspeed intake, a prl charge pipe, and a killer b tmic. I have not been tuned for my tmic yet as I am waiting for Cobb flexfuel but I must say the car is running great. My last dyno on my Cobb ap showed 330 hp 360 tq with the dynojet selected. I realize these numbers are on the happy side but the bottom line is that I always virtual dyno on the same stretch of road and every part I put on my car just made more and more power. Having said that, a full 3" exhaust was my single biggest improvement.

rufus819 · 04-11-2016, 10:07 PM

I agree, the stock catback is pretty restrictive. If you follow Seeya's walk through it can remedy it, or get an aftermarket CBE like you and I did. The cobb CBE isn't that loud, but I'm ok with that. I don't want a loud exhaust and I'm pretty happy that inside my car I can still listen to music and have conversations at a normal volume.

xccmotorsports · 04-11-2016, 10:54 PM

Quote:

Originally Posted by rufus819

I agree, the stock catback is pretty restrictive. If you follow Seeya's walk through it can remedy it, or get an aftermarket CBE like you and I did. The cobb CBE isn't that loud, but I'm ok with that. I don't want a loud exhaust and I'm pretty happy that inside my car I can still listen to music and have conversations at a normal volume.

I respect the fact you took the time to post your results.

I will say however, there is a lot of power to be had from a J-pipe. Like someone mentioned before, the peak numbers aren't all that should be taken into consideration. My initial impressions from the j-pipe (Cobb catted & resonated) were that the car was way more eager to get off the line and spool up under partial throttle, which made daily driving a lot more enjoyable for me.

Also, can we get facts to back up "the j-pipe isn't as restrictive". What are the cell counts on the factory catalytic converters for both the FA/EJ?

rufus819 · 04-11-2016, 10:58 PM

Look at the factory downpipe of any EJ motor, see the 2 extreme bends not to mention the path it travels? The J-Pipe only one bend and it's not that extreme after that it's a straight shot out your exhaust.

If I can get the results from the guy who went before me who put down 260/306 on a catted jpipe, intake and spt CBE, i would post those to compare to my 275/309 on the stock jpipe. If I can get them from EFI, awesome. If not oh well.

According to my tuner he said if I add a J-pipe he could get me to the 285/320 range and the amount a jpipe costs I don't see that worth my time just yet. If I do it, it will be with an intercooler as well to get the most out of an aftermarket Jpipe. Again I'm going off my tuner's advice, not broscience I read on the forum.

xccmotorsports · 04-11-2016, 11:26 PM

Quote:

Originally Posted by rufus819

Look at the factory downpipe of any EJ motor, see the 2 extreme bends not to mention the path it travels? The J-Pipe only one bend and it's not that extreme after that it's a straight shot out your exhaust.

If I can get the results from the guy who went before me who put down 260/306 on a catted jpipe, intake and spt CBE, i would post those to compare to my 275/309 on the stock jpipe. If I can get them from EFI, awesome. If not oh well.

According to my tuner he said if I add a J-pipe he could get me to the 285/320 range and the amount a jpipe costs I don't see that worth my time just yet. If I do it, it will be with an intercooler as well to get the most out of an aftermarket Jpipe. Again I'm going off my tuner's advice, not broscience I read on the forum.

I have a fully catless setup on my STI, the bends you're talking about are not the differentiator. Piping diameter and cat cell count is what you should be comparing.

rufus819 · 04-11-2016, 11:35 PM

Stock J-pipe is 2.5" on the FA20T

rufus819 · 04-12-2016, 12:01 AM

Keep in mind I'm not saying the J-pipe isn't a good modification to do at all. I'm saying that for how cheap the TGV and EGR deletes are, it's a no brainer for how much you can gain. If you're going to spend the $5-700 on a j-pipe, spend the extra $150 on the deletes too.

Both of our cars baseline dyno'd at 220 hp.

His Jpipe/intake combo, let's figuratively cost together $800 + $149 EBCS+ $600 Accessport+ $500 protune= $1300, at a 40HP gain that's $47/hp

My TGV and EGR deletes cost me $120 + $140 EBCS + $600 Accessport + $500 protune = $1360 at a 55 hp gain that's $24/hp

I'm not preaching that you shouldn't go stg 2, I'm just bringing to the table that there are other power options out there for different budgets. A lot of people sensibly would go Cobb OTS Stg 1, then OTS Stg 2, then add whatever other things in before they for a protune, I wanted to be different

Also I'll add my tuner had a pull with my stock J-Pipe at 285hp @ 22psi but he didn't like how it felt and in the name of drivability/reliability for my car, he dialed it down to 275 @ 20psi

xccmotorsports · 04-12-2016, 01:20 AM

Quote:

Originally Posted by rufus819

Keep in mind I'm not saying the J-pipe isn't a good modification to do at all. I'm saying that for how cheap the TGV and EGR deletes are, it's a no brainer for how much you can gain. If you're going to spend the $5-700 on a j-pipe, spend the extra $150 on the deletes too.
...

I fully understand. I think you will be pleasantly surprised when you eventually do add a j-pipe. Let's face it, it's inevitable

TGV & EGR deletes with TMIC are next on my list. This thread makes it easy to rationalize my purchase now. So, thank you.

rufus819 · 04-12-2016, 01:23 AM

It will definitely be done in the near future for myself as I don't know how long the stock J-Pipe will hold up. Given that my tuner throttled down the tune from 285 to 275 to make it reliable and drivable, i feel a little better. I would like to do my intercooler in the same time span as well though.

Wireeater · 04-12-2016, 10:33 AM

I was lucky and grabbed an ETS catless, TGVD & EBCS for $600 shipped at the time. I'm all about dollar VS performance. There are some parts I wouldn't buy used and some I do... if I were in the market I to do a jpipe upgrade I would not pay the premium let someone else do that. The market is flooded with used catless pipes. Catted is quite a bit harder to find used though. But then it makes it justifiable when you can find those deals.

henryncoke · 04-12-2016, 11:16 AM

The dyno results are pretty surprising! Looks like I'm going to be going this route also since it's easier it'll be easier on my pockets.

Barnt · 04-12-2016, 12:48 PM

This is very interesting and I'm glad someone wrote about it. I have an ETS intake, ETS J-pipe, IAG EGR delete, TGV deletes, IAG AOS (street series), Corsa catback, KillerB chargepipe + TMIC. Currently I'm at 317hp and 350lb ft. My tuner refused to go higher with the stock connecting rods, but said I could probably get 380+ lbft with my set-up. Who knows...
I feel there are definitely some mods that are much more effective per dollar wise than others. For starters, the aftermarket intakes are $400 noisemakers. Definitely not worth the maybe 5hp you get in my opinion. That sound is fantastic

but not worth $400.
The J-pipe was kinda ridiculous price-wise but it definitely gave me more top end and again, the sound is fantastic.
The TGV and EGR deletes were probably the best mod. The car was extremely sluggish below 1500rpm when I did the TGVs, so I did the EGR delete the next weekend and it made a huge difference. Much better low end response with the EGR delete and better top end with the TGV delete. (so don't JUST do the TGV delete)
The charge-pipe and TMIC made a huge difference. My torque curve was MUCH better after the charge pipe, and the manifold temps were SIGNIFICANTLY lower with the KillerB unit. I did one autocross with a few other guys in our Subaru club and my manifold temps were 10-25 degrees over the intake temps throughout the day. The guys with the stock tmic were 20-40 degrees over their intake temps. This is a huge difference not just for power but for reliability.
Honestly if I were to do it over again, I probably would leave the stock intake and J-pipe and just do everything else. Then MAYBE get the Cobb flexfuel kit and run a E50ish blend. I'd like to see what a car can do with flexfuel and upgraded TMIC, chargepipe, EGR and TGV deletes! Everything else stock.

DoctorPopcorn · 04-12-2016, 12:59 PM

At the moment I've got a Mishi boxed intake and I'm using the MAPerformance stage 1 93 tune that was included with buying the AP. The difference is night and day between stock and 93 MAP tune (the intake noise is fun, too). I put in an order for the Torque Solutions TGVDs, a MAP catted J pipe, and plan on a protune from MAP, as they're just on the other side of the Twin Cities from me.

I haven't run into much about the EGR deletes... probably a not a bad thing to throw in before getting it protuned. I consider myself spoiled, as I've got a station that sells 93 just a few miles from work; I think tuning on 93 really makes the difference, but it's so darn hard to find, especially on the west coast.

MAPerformance also has a TMIC out now for $700 that's on my list, and charge pipes in the works, along with their own TGVDs. So far, the customer service I've received from Ian has been just about the best I've ever had. I'm excited to see what happens!

Thank you for starting the thread on TGV & EGR deletes!

mike78033 · 04-12-2016, 01:16 PM

I don't think this has been mentioned yet, or maybe I missed it, but what type of dyno were you using? Mustang or DynoJet? On a Mustang dyno with just TGV deletes (and Matt Miner protune) I pulled 269hp/267tq - so I'm trying to decide if EGR deletes and EBCS add-ons with a retune would be worth it.

sexmachine · 04-12-2016, 02:55 PM

I would be really curious to see what the protune alone did.

I imagine that about 80% of the gains were from the tune.

Does that seem correct?

rufus819 · 04-12-2016, 03:52 PM

Quote:

Originally Posted by mike78033

I don't think this has been mentioned yet, or maybe I missed it, but what type of dyno were you using? Mustang or DynoJet? On a Mustang dyno with just TGV deletes (and Matt Miner protune) I pulled 269hp/267tq - so I'm trying to decide if EGR deletes and EBCS add-ons with a retune would be worth it.

yes, EBCS you won't see a power gain in just by itself, but it will keep your boost consistent and what peak boost you're tuned. You'll also hear your boost flutter quite a bit when your turbo does come on, but that's normal. EGR delete is huge not only for some power gains but it will reduce the amount of carbon build up on your heads.

rufus819 · 04-12-2016, 03:53 PM

Quote:

Originally Posted by Wireeater

I was lucky and grabbed an ETS catless, TGVD & EBCS for $600 shipped at the time. I'm all about dollar VS performance. There are some parts I wouldn't buy used and some I do... if I were in the market I to do a jpipe upgrade I would not pay the premium let someone else do that. The market is flooded with used catless pipes. Catted is quite a bit harder to find used though. But then it makes it justifiable when you can find those deals.

That's what I'm noticing, i may just have to bite the bullet in the future and buy a new catted J-pipe. Either way I'm looking at the Grimmspeed or KillerB one.

Quote:

Originally Posted by DoctorPopcorn

At the moment I've got a Mishi boxed intake and I'm using the MAPerformance stage 1 93 tune that was included with buying the AP. The difference is night and day between stock and 93 MAP tune (the intake noise is fun, too). I put in an order for the Torque Solutions TGVDs, a MAP catted J pipe, and plan on a protune from MAP, as they're just on the other side of the Twin Cities from me.

I haven't run into much about the EGR deletes... probably a not a bad thing to throw in before getting it protuned. I consider myself spoiled, as I've got a station that sells 93 just a few miles from work; I think tuning on 93 really makes the difference, but it's so darn hard to find, especially on the west coast.

MAPerformance also has a TMIC out now for $700 that's on my list, and charge pipes in the works, along with their own TGVDs. So far, the customer service I've received from Ian has been just about the best I've ever had. I'm excited to see what happens!

Thank you for starting the thread on TGV & EGR deletes!

For the extra $50, do the EGR deletes. It's not a huge power gain but you'll reduce carbon build up. I like the MAP stage 2 package, it gives a big power boost right out of the box, but I wanted to go my own path

and yes get a separate tune for 93 if you can. When I used to own my Spec B I was initially tuned for 91 by Crawford Performance in 2011 (I was stationed in San Diego) and when I came home east I was retuned for 93 by EFI Logics and there was about a 10/10 difference between the 2.

Wireeater · 04-12-2016, 04:25 PM

With the EGR you also get reduced intake manifold temperatures because it's no longer is releasing the NOx exhaust back into the manifold. During summer time, I could watch when the EGR valve opened because you could see the manifold intake temps go from 120 to 140-160. That extra +30 degree matters when you are already struggling to keep your IATs down. It also helps reduce cruise knock and predet.

When I did the EGR, I also did PW TMIC/CP and Water/Meth so I'm not sure the measurement afterwards but during a warm day when just cruising and not pulling in large amount of air, I'm only sitting around 20-30 degrees above ambient air with no fluctuations like having the EGR hooked up. When doing WOT pulls, I sit around 10-15 degrees higher than ambient temps.

04-11-2016, 10:58 PM	#36
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	My tuning experience: Why TGV and EGR deletes are a must Look at the factory downpipe of any EJ motor, see the 2 extreme bends not to mention the path it travels? The J-Pipe only one bend and it's not that extreme after that it's a straight shot out your exhaust. If I can get the results from the guy who went before me who put down 260/306 on a catted jpipe, intake and spt CBE, i would post those to compare to my 275/309 on the stock jpipe. If I can get them from EFI, awesome. If not oh well. According to my tuner he said if I add a J-pipe he could get me to the 285/320 range and the amount a jpipe costs I don't see that worth my time just yet. If I do it, it will be with an intercooler as well to get the most out of an aftermarket Jpipe. Again I'm going off my tuner's advice, not broscience I read on the forum.

04-12-2016, 12:48 PM	#44
Barnt Scooby Newbie Member#: 161824 Join Date: Oct 2007 Chapter/Region: MWSOC Location: Caledonia(Racine), Wisconsin Vehicle: 15 WRX. Pro-tuned Way too blue...	This is very interesting and I'm glad someone wrote about it. I have an ETS intake, ETS J-pipe, IAG EGR delete, TGV deletes, IAG AOS (street series), Corsa catback, KillerB chargepipe + TMIC. Currently I'm at 317hp and 350lb ft. My tuner refused to go higher with the stock connecting rods, but said I could probably get 380+ lbft with my set-up. Who knows... I feel there are definitely some mods that are much more effective per dollar wise than others. For starters, the aftermarket intakes are $400 noisemakers. Definitely not worth the maybe 5hp you get in my opinion. That sound is fantastic but not worth $400. The J-pipe was kinda ridiculous price-wise but it definitely gave me more top end and again, the sound is fantastic. The TGV and EGR deletes were probably the best mod. The car was extremely sluggish below 1500rpm when I did the TGVs, so I did the EGR delete the next weekend and it made a huge difference. Much better low end response with the EGR delete and better top end with the TGV delete. (so don't JUST do the TGV delete) The charge-pipe and TMIC made a huge difference. My torque curve was MUCH better after the charge pipe, and the manifold temps were SIGNIFICANTLY lower with the KillerB unit. I did one autocross with a few other guys in our Subaru club and my manifold temps were 10-25 degrees over the intake temps throughout the day. The guys with the stock tmic were 20-40 degrees over their intake temps. This is a huge difference not just for power but for reliability. Honestly if I were to do it over again, I probably would leave the stock intake and J-pipe and just do everything else. Then MAYBE get the Cobb flexfuel kit and run a E50ish blend. I'd like to see what a car can do with flexfuel and upgraded TMIC, chargepipe, EGR and TGV deletes! Everything else stock. Last edited by Barnt; 04-15-2016 at 11:28 AM.

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04-11-2016, 01:18 PM	#26
The Fan Scooby Specialist Member#: 421937 Join Date: May 2015 Chapter/Region: SCIC Location: San Diego Vehicle: 2015 WRX WR Blue	What are the down sides of any to having tgv/egr deletes if any? * Registered users of the site do not see these ads.

04-11-2016, 01:23 PM	#27
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	you can kiss your warranty goodbye. You'll experience a little rougher and higher idle as a result but it's nothing to be alarmed about.

04-11-2016, 02:20 PM	#29
SubieRX15 Scooby Newbie Member#: 435413 Join Date: Dec 2015	Thanks for the great info. Are any of you guys running the P&L motorsports TGV housing and upper TGV deletes?

04-11-2016, 02:30 PM	#30
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	I'm running the TiC TGV Deletes and the IAG EGR delete. I got them off a local facebook group for $120 combined.

04-11-2016, 09:51 PM	#33
tyler37075 Scooby Newbie Member#: 398361 Join Date: Aug 2014 Location: Hendersonville,Tn Vehicle: 2015 wrx ice silver,wr blue	I don't want to blow this thread up but I just have to speak from my experience after reading this. I went from stock to a Bren etune with tgvs 3 port ebcs and a killer b j pipe and killed b catted I pipe. I was not really impressed with my car until I added an Ets 3" quiet catback. A lot of people say a cat back doesn't make a lot of difference but it really woke my car up with the mods I already had. Since then I have added egr deletes, a grimmspeed intake, a prl charge pipe, and a killer b tmic. I have not been tuned for my tmic yet as I am waiting for Cobb flexfuel but I must say the car is running great. My last dyno on my Cobb ap showed 330 hp 360 tq with the dynojet selected. I realize these numbers are on the happy side but the bottom line is that I always virtual dyno on the same stretch of road and every part I put on my car just made more and more power. Having said that, a full 3" exhaust was my single biggest improvement.

04-11-2016, 10:07 PM	#34
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	I agree, the stock catback is pretty restrictive. If you follow Seeya's walk through it can remedy it, or get an aftermarket CBE like you and I did. The cobb CBE isn't that loud, but I'm ok with that. I don't want a loud exhaust and I'm pretty happy that inside my car I can still listen to music and have conversations at a normal volume.

04-11-2016, 11:35 PM	#38
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	Stock J-pipe is 2.5" on the FA20T

04-12-2016, 12:01 AM	#39
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	Keep in mind I'm not saying the J-pipe isn't a good modification to do at all. I'm saying that for how cheap the TGV and EGR deletes are, it's a no brainer for how much you can gain. If you're going to spend the $5-700 on a j-pipe, spend the extra $150 on the deletes too. Both of our cars baseline dyno'd at 220 hp. His Jpipe/intake combo, let's figuratively cost together $800 + $149 EBCS+ $600 Accessport+ $500 protune= $1300, at a 40HP gain that's $47/hp My TGV and EGR deletes cost me $120 + $140 EBCS + $600 Accessport + $500 protune = $1360 at a 55 hp gain that's $24/hp I'm not preaching that you shouldn't go stg 2, I'm just bringing to the table that there are other power options out there for different budgets. A lot of people sensibly would go Cobb OTS Stg 1, then OTS Stg 2, then add whatever other things in before they for a protune, I wanted to be different Also I'll add my tuner had a pull with my stock J-Pipe at 285hp @ 22psi but he didn't like how it felt and in the name of drivability/reliability for my car, he dialed it down to 275 @ 20psi

04-12-2016, 01:23 AM	#41
rufus819 Scooby Specialist Member#: 202947 Join Date: Feb 2009 Chapter/Region: Tri-State Location: The Hills, NJ Vehicle: 2015 WRX Limited ISM 275/310 PhatBotti tuned	It will definitely be done in the near future for myself as I don't know how long the stock J-Pipe will hold up. Given that my tuner throttled down the tune from 285 to 275 to make it reliable and drivable, i feel a little better. I would like to do my intercooler in the same time span as well though.

04-12-2016, 10:33 AM	#42
Wireeater Scooby Specialist Member#: 76503 Join Date: Dec 2004 Chapter/Region: MAIC Location: VA Vehicle: 2016 Mustang GT	I was lucky and grabbed an ETS catless, TGVD & EBCS for $600 shipped at the time. I'm all about dollar VS performance. There are some parts I wouldn't buy used and some I do... if I were in the market I to do a jpipe upgrade I would not pay the premium let someone else do that. The market is flooded with used catless pipes. Catted is quite a bit harder to find used though. But then it makes it justifiable when you can find those deals.

04-12-2016, 11:16 AM	#43
henryncoke Scooby Newbie Member#: 442138 Join Date: Mar 2016 Chapter/Region: SCIC Location: Los Angeles Vehicle: 2016 WRX White	The dyno results are pretty surprising! Looks like I'm going to be going this route also since it's easier it'll be easier on my pockets.

04-12-2016, 12:59 PM	#45
DoctorPopcorn Scooby Newbie Member#: 442734 Join Date: Mar 2016 Location: Minnesota Vehicle: 2016 WRX Dark Grey Metallic	At the moment I've got a Mishi boxed intake and I'm using the MAPerformance stage 1 93 tune that was included with buying the AP. The difference is night and day between stock and 93 MAP tune (the intake noise is fun, too). I put in an order for the Torque Solutions TGVDs, a MAP catted J pipe, and plan on a protune from MAP, as they're just on the other side of the Twin Cities from me. I haven't run into much about the EGR deletes... probably a not a bad thing to throw in before getting it protuned. I consider myself spoiled, as I've got a station that sells 93 just a few miles from work; I think tuning on 93 really makes the difference, but it's so darn hard to find, especially on the west coast. MAPerformance also has a TMIC out now for $700 that's on my list, and charge pipes in the works, along with their own TGVDs. So far, the customer service I've received from Ian has been just about the best I've ever had. I'm excited to see what happens! Thank you for starting the thread on TGV & EGR deletes!

04-12-2016, 01:16 PM	#46
mike78033 Scooby Newbie Member#: 399939 Join Date: Aug 2014 Chapter/Region: NESIC Location: North Shore, MA Vehicle: 2015 WRX Lightning Red	I don't think this has been mentioned yet, or maybe I missed it, but what type of dyno were you using? Mustang or DynoJet? On a Mustang dyno with just TGV deletes (and Matt Miner protune) I pulled 269hp/267tq - so I'm trying to decide if EGR deletes and EBCS add-ons with a retune would be worth it.

04-12-2016, 02:55 PM	#47
sexmachine Scooby Newbie Member#: 414514 Join Date: Feb 2015 Location: Memphis, TN Vehicle: 2016 WRX (sold) 1987 Grand National	I would be really curious to see what the protune alone did. I imagine that about 80% of the gains were from the tune. Does that seem correct?

04-12-2016, 04:25 PM	#50
Wireeater Scooby Specialist Member#: 76503 Join Date: Dec 2004 Chapter/Region: MAIC Location: VA Vehicle: 2016 Mustang GT	With the EGR you also get reduced intake manifold temperatures because it's no longer is releasing the NOx exhaust back into the manifold. During summer time, I could watch when the EGR valve opened because you could see the manifold intake temps go from 120 to 140-160. That extra +30 degree matters when you are already struggling to keep your IATs down. It also helps reduce cruise knock and predet. When I did the EGR, I also did PW TMIC/CP and Water/Meth so I'm not sure the measurement afterwards but during a warm day when just cruising and not pulling in large amount of air, I'm only sitting around 20-30 degrees above ambient air with no fluctuations like having the EGR hooked up. When doing WOT pulls, I sit around 10-15 degrees higher than ambient temps.