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Old 07-01-2014, 05:15 PM   #1
LL25t
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Default 43whp/33wtq on catback and intake???

Sorry if this is a repost but just saw this video on Mishimoto's '15 WRX
stock tune, catback and intake yielding 43whp and 33wtq on a stock tune. Would love to see the A/F on this...

video link for the people who haven't seen this yet.

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Old 07-01-2014, 05:39 PM   #2
Karb0n
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There car should make around 400whp with that intake and a tune
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Old 07-01-2014, 05:43 PM   #3
toph
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I honestly wouldn't have posted this if I was Mishimoto. Pretty much discredits them in the performance market. It's like that guy in the Civic a few months back that thought he trapped 230+ in the 1/2 mile. Yes, the piece of paper said it, that does not mean you have to (or should) believe it.
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Old 07-01-2014, 06:04 PM   #4
Tomekkplk
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Don't you need a tune for any aftermarket intake, even for the 2015?

Well if it's on youtube it must be true.
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Old 07-01-2014, 09:56 PM   #5
Yorker1127
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Quote:
Originally Posted by Tomekkplk View Post
Don't you need a tune for any aftermarket intake, even for the 2015?

Well if it's on youtube it must be true.
They say you don't but its been proven in the past that any intake on a stock tune will alter the AF, I'm going to wait for Cobb/let others do it and see if they blow up before I risk mine
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Old 07-01-2014, 10:20 PM   #6
arghx7
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Look at the video in full screen mode. The tailpipe AFR is on the right. It's noticeably leaned out from low 10's in the before run to mid 11's in the after run. The real question is whether changing the intake threw off the load calculation to the point where the spark timing is all jacked up and it's knocking.
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Old 07-02-2014, 02:01 AM   #7
Celery GT-5
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Seems pretty unlikely
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Old 07-02-2014, 09:03 AM   #8
wgr73
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I've seen an intake add 30+whp, but the car was running dangerously lean! (12.5:1). It didn't knock, which was surprising...and we only have 91 available here.

I would never add an intake and not tune for it, or at the least log and see if changes need to be made. Blindly throwing an intake on a car is asking for trouble.
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Old 07-02-2014, 09:15 AM   #9
VladiWrX
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Intake, ELH, Downpipe, Exhaust and you got yourself a 500hp wrx.

Good stuff Mishimoto
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Old 07-02-2014, 09:41 AM   #10
Celery GT-5
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Quote:
Originally Posted by VladiWrX View Post
Intake, ELH, Downpipe, Exhaust and you got yourself a 500hp wrx.

Good stuff Mishimoto


600HP w/ smokestacks

Last edited by Celery GT-5; 07-02-2014 at 11:33 AM.
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Old 07-02-2014, 11:26 AM   #11
Sinsear
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Quote:
Originally Posted by Celery GT-5 View Post


600P w/ smokestacks
Go hellaflush and shave a minute off the nurburgring lap time as well.

Sent from my Android device using Tapatalk
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Old 07-02-2014, 12:13 PM   #12
Subian
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Don't DI cars normally run on the leaner side? P&L picked up decent gains just throwing a TBE on their shop car with no tuning obviously. Not sure how much an intake would add without being able to tune for it.


Last edited by Subian; 07-02-2014 at 12:20 PM.
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Old 07-02-2014, 12:17 PM   #13
Celery GT-5
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I think so
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Old 07-02-2014, 01:04 PM   #14
wgr73
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Quote:
Originally Posted by Subian View Post
Don't DI cars normally run on the leaner side? P&L picked up decent gains just throwing a TBE on their shop car with no tuning obviously. Not sure how much an intake would add without being able to tune for it.
Yes they run leaner. that 10.x:1 afr in the video is way rich. I think John ran 11.5 on his ECUtek wrx. So mishimoto's intake brought afr's close to inline with Johns
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Old 07-02-2014, 02:03 PM   #15
toph
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I hope these are actual gains because that means there is a MAJOR restriction in there. I am just extremely skeptical.
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Old 07-02-2014, 02:10 PM   #16
Celery GT-5
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I wonder if these bolt ons are just allowing extra boost. The gains might be real, but after a tune I doubt they will gain much more and a tune might have the same gains w/o an intake
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Old 07-02-2014, 03:03 PM   #17
ProfessWRX
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Quote:
Originally Posted by toph View Post
I hope these are actual gains because that means there is a MAJOR restriction in there. I am just extremely skeptical.
It's entirely possible.
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Old 07-02-2014, 04:08 PM   #18
Celery GT-5
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This engine is rated at 290hp in japan, they had to do something to detune it...it's probably just limited boost though, not a terrible intake pipe.

The charge pipe sure does look tiny though...
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Old 07-03-2014, 03:59 PM   #19
EMS
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Quote:
Originally Posted by arghx7 View Post
Look at the video in full screen mode. The tailpipe AFR is on the right. It's noticeably leaned out from low 10's in the before run to mid 11's in the after run. The real question is whether changing the intake threw off the load calculation to the point where the spark timing is all jacked up and it's knocking.
It's very clear that the intake reduces MAF voltage output for given airflow. Because of this, the AFR will lean out and because of the lower calculated engine load, it will advance the ignition timing. What's also happening, the calculated torque will be lower than the actual torque, which means the torque limiting isn't interfearing as quickly as with stock intake. Therefore more boost is allowed and/or throttle isn't closed because of exhaust mod.

Above you see the P&L dynosheet from WRX 2015 with turbo back exhaust, where you could clearly see that the torque limiting in this ECU was doing it's job. With this intake the ECU is "fooled" and the torque limiter is acting quite a bit later...

However, I am quite sure the ignition time is quite retarded by the knock control this way! I've seen quite some examples that even with stock AFR, timing and boost, the ECU is pulling timing quite a bit. It's not the sort of "tuning" I would appreciate.... Better use a decent intake and exhaust in combination with a good tune!
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Old 07-03-2014, 04:03 PM   #20
EMS
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Quote:
Originally Posted by toph View Post
I hope these are actual gains because that means there is a MAJOR restriction in there. I am just extremely skeptical.
There is NO MAJOR restriction in there, read my previous post.
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Old 07-03-2014, 04:48 PM   #21
Badler
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Don't these new WRXs boost spike at like 20psi stock as well?
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Old 07-03-2014, 05:21 PM   #22
Celery GT-5
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Some up to 22.5 of so, but just for a second
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