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Old 12-29-2015, 03:21 PM   #1
PhatBotti Tuning TKR
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Default *** Phatbotti Tuning 2015 WRX Grimmspeed Intake Comparo + New Spark Plug Comparo ***

Event: Dyno Tuning
Location: California
Ambient Temp: 80
Elevation: 0
Weather: sunny
Car: 2015 WRX
Tuner: Ron aka PhatRon
Tuned With: Cobb APv3
Dyno Info: Mustang-500-SE
Transmission: 6spd
Gear: 3rd
Peak HP at RPM: 336whp @ 5800rpm
Peak Torque at RPM: 370tq @ @ 3600rpm
Baseline hp/tq for a stock on same dyno: 207whp/208 wtq (91octane)
Target Boost: 23 psi tapering to 16psi
Fuel: e63 (from zeitronix gauge)

Modifications: Cobb APv3, IAG TGV Deletes, IAG AOS, IAG EGR Deletes

Mods Added for this testing: New OEM Spark Plugs. Grimmspeed Stealth Intake







First up is the spark plug test. I had 34k on my original plugs and decided to change them out and see if there was any difference. No noticeable difference between the 34k mile plugs and the freshies.

I will say to be careful when getting plugs though. Subaru gave me 3 correct plugs and 1 plug for an NA car. So always be sure to check your part numbers before you leave the dealership. Cost me 2 hrs sitting in traffic to go back and get the correct plug.



Next up is the Grimmspeed Stealthbox intake. The testing was done on the same car, same fuel, same day, same boost, same AFR, and same timing. Peak gains were 10whp and 7 ft*lbs of tq. Now for the question everyone asks

Can I Run This Without a Tune
- Of course, you can run anything without a tune if you're willing to accept the risks. However, I would not recommend it on 91 octane.
- Fueling will change ~10-15% across the entire maf scale. IE, it will lean the car out by a point at wide open throttle.
- Boost will increase 1-3 psi. Being that the stock tune already spikes to 23.5-24psi, this mod would probably cause you to hit overboost fuel cut and be very annoying. Of course the overboosting will vary from car to car and test to test on stock vehicles depending on the ambient temp at the time of the pull due to Subaru aggressively reducing the wgdc when the temps decrease.



All 3 plots together



Boost Plot of the 3 pulls

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Last edited by PhatBotti Tuning TKR; 12-29-2015 at 08:39 PM.
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Old 12-29-2015, 03:25 PM   #2
Phatron
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Subbing myself
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Old 12-29-2015, 04:09 PM   #3
wuuusaa
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Ron since Cobb hasn't come out with the Flex Fuel kit for 2015 + Wrx's. What kit are you using?

Also what exhaust system are you planning on using?
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Old 12-29-2015, 04:53 PM   #4
Phatron
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Default *** Phatbotti Tuning 2015 WRX Grimmspeed Intake Comparo + New Spark Plug Comp...

I just have maps on the ap for 5,7,9,12 and full e85. Manual flex fuel.
I can run the 5gallon map with 7 or 9 gallons too. Since these cars can stay in closed loop at wot it's not really a huge deal.

I won't be putting an exhaust on. I'm old now and don't really like how they sound on these 15's.
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Old 12-30-2015, 08:28 AM   #5
west_minist
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Very nice!!!

Happy New year to you!
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Old 12-30-2015, 12:07 PM   #6
wgr73
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This is awesome!! Thanks for the info.

Lol @ you being 'old', you've said that for years You've just been in the game a while
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Old 12-30-2015, 05:13 PM   #7
Phatron
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I'm way closer to 40 than 30. That's old
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Old 12-31-2015, 12:00 PM   #8
wgr73
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Hahahaha
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Old 12-31-2015, 10:55 PM   #9
2gnt2wrx
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How do you like the intake? I haven't found a video of the sound it makes.
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Old 01-01-2016, 12:01 PM   #10
XGWAR
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How did the OEM plugs work out?
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Old 01-01-2016, 01:01 PM   #11
Phatron
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Quote:
Originally Posted by XGWAR View Post
How did the OEM plugs work out?

In what way? The graph is in the post.
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Old 01-01-2016, 01:25 PM   #12
XGWAR
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I was just doing a compare on my WRX FLEX FUEL , sorry didn't noticed you said the original plugs were good..

Last edited by XGWAR; 01-01-2016 at 01:47 PM.
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Old 01-04-2016, 08:09 PM   #13
MZR2FA20DIT
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Wow! 129hp increase from baseline with just a few intake mods and E mix.
I'm impressed.
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Old 01-04-2016, 08:53 PM   #14
stealth06wrx
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I definitely like the idea of just an intake and flexfuel instead of a turbo back...more power and more quiet! also getting old!
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Old 02-05-2016, 11:52 AM   #15
labGTO
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What fuel pump are you running on your WRX?
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Old 02-05-2016, 12:39 PM   #16
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finally an HONEST review of an intake on a '15 with data to back it up. well done sir.

do you have the same test for the TGV deletes?
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Old 07-05-2016, 12:49 AM   #17
hekler
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Good review of a part made by someone other than the tester!! Please put up more!!
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Old 07-10-2016, 06:56 PM   #18
PhatBotti Tuning TKR
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Quote:
Originally Posted by labGTO View Post
What fuel pump are you running on your WRX?
stock

Quote:
Originally Posted by Dobbs View Post
finally an HONEST review of an intake on a '15 with data to back it up. well done sir.

do you have the same test for the TGV deletes?
not sure where the charts are now as i did it like a year and a half ago...but they picked up a solid 10-15hp across the whole powerband.
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Old 08-12-2016, 01:41 PM   #19
hekler
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Bump for a great post and a great tuner here!!
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Old 01-07-2019, 01:00 PM   #20
thwrightstuff
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Quote:
Originally Posted by PhatBotti Tuning TKR View Post
stock

not sure where the charts are now as i did it like a year and a half ago...but they picked up a solid 10-15hp across the whole powerband.
Sorry to revive this post, but I have a very difficult time believing that only an AOS, TGV/EGR deletes and a GS intake gave you a 129HP increase when pro tuned. All of the other research I've done indicates that intakes give at most 15hp increase and the deletes provide similar figures (+15hp-ish).

Am I misreading your graphs or the information in your post? The typical stock tune at 5800rpms is around 220-240hp. Where is this massive jump coming from?
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Old 01-07-2019, 01:11 PM   #21
anarekist
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Quote:
Originally Posted by thwrightstuff View Post
Sorry to revive this post, but I have a very difficult time believing that only an AOS, TGV/EGR deletes and a GS intake gave you a 129HP increase when pro tuned. All of the other research I've done indicates that intakes give at most 15hp increase and the deletes provide similar figures (+15hp-ish).

Am I misreading your graphs or the information in your post? The typical stock tune at 5800rpms is around 220-240hp. Where is this massive jump coming from?
its running ethanol
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Old 01-07-2019, 01:13 PM   #22
thwrightstuff
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Quote:
Originally Posted by anarekist View Post
its running ethanol
Hmm, that explains it
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