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Old 05-05-2009, 01:55 PM   #1
AMR
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News 2008 Subaru STi - STOCK TURBO - AMR 272in/272ex v1 Camshafts!!!

Dyno: Dyno Dynamics (1.0 Correction)
Tuner: AMR
Wheel HP: 342whp (stock 201whp)
Wheel TQ: 420wtq (stock 220wtq)
Vehicle Location: USA

Car Info
Year: 2008
Engine Management: COBB APv2 w/ AMR Reflash
Turbo: STOCK
Intercooler: AMR Top Mount Intercooler (TMIC)
Meth Kit: None
Injectors: AMR 750cc Injectors
Intake/Inlet: AMR BMI Cold Air System / AMR Turbo Inlet Hard Pipe
Headers: AMR Race Headers
Uppipe: AMR Up-Pipe
Downpipe: AMR Catless Downpipe
CBE: AMR Stealth-Back Exhaust
Other Power Mods:
- AMR 272in / 272ex v1 Camshafts
- AMR Electronic Boost Control Solenoid (EBCS)
- Walbro 255 Fuel Pump



Dyno Sheet:






Notes:

We have got alot of request and questions regarding what the stock turbo can do with a set of camshafts. Nothing was changed on the vehicle other than the camshafts and tuning. So here is the results.

We installed out AMR 272in / 272exh v1 Camshafts on a STOCK TURBO 2008 STi. We were very impressed with the results. The turbocharger is pretty much done with the camshafts. Boost hits 21psi and tapers hard to 14psi. The original tune boost tapered from 21psi to 16psi. The turbocharger does is not large enough to produce the air needed upstairs.

As you can see from the dyno sheet. Across the entire RPM band we picked up HP and TQ. Peak torque jumped from 390wtq to 420wtq. Peak horsepower increase by 20hp at 5200rpm but continued to gain and showed a 40hp increase at 5700rpm. No doubt with a larger turbocharger the gains will continue to grow and shine.


AFR: 10.8afr
Octane: Pump Gas (93 octane)


On a side note we will be installing our v1 272/272 camshafts on a 2008 STi equipped with our T60R to show you guys the gains with a larger turbo.

We have two 2008 STi's equipped with our rotated turbo kits that are getting our AMR 278in / 278ex v2 Camshafts as well. I will post that when they are complete.




-Rob
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Old 05-05-2009, 02:13 PM   #2
CatfaceType-R
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very impressive stuff from AMR once again. This is going to change the game up on the chase for the stock turbo STi record


kudos to rob+amr for this interesting data

Let's get some vids up of how it sound, for the w1n, prease..
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Old 05-05-2009, 02:24 PM   #3
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WOW that is just insane.

Nice work guys.
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Old 05-05-2009, 02:31 PM   #4
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Nice man, impressive, how did you AVCS maps change? massivley I assume??
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Old 05-05-2009, 02:38 PM   #5
Equilibrium Tuning
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How did the weather conditions compare between pulls?
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Old 05-05-2009, 02:47 PM   #6
Illusive
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interesting, i would of figured cams on the stock snail to be a hinderance rather than helping.
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Old 05-05-2009, 02:51 PM   #7
AMR
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Quote:
Originally Posted by Kastley85891 View Post
Nice man, impressive, how did you AVCS maps change? massivley I assume??

You are correct. They changed drastically. Settings that I had in there from the previous tune were way off. 3/4 of the tuning session was AVCS mapping. Well worth it though.



Quote:
Originally Posted by Vaus View Post
How did the weather conditions compare between pulls?

We have central air and heat in our facility. The facility stays at a consistent temperature due to our machinery and electronics. But to answer your question there is only a 1-3 degree difference.



-Rob
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Old 05-05-2009, 02:59 PM   #8
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I'm surprised to see the increase in power EVERYWHERE, I would have thought it would have bumped the powerband to the right a bit. Impressive....
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Old 05-05-2009, 03:09 PM   #9
WRX Loki
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WoW
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Old 05-05-2009, 05:18 PM   #10
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So I have never really thought about doing cams in the the STi before but have done them in Honda's, SBC's, etc.

Does the motor have to come out to do them? I cannot see how you could do it otherwise.
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Old 05-05-2009, 05:35 PM   #11
STi Mikey
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Is this really on 1.0 CF? I only make like 300whp on 1.0 cf and thats good for low 12's. I would really like to see what this car can do at the track or on the street. It would also be interesting to see what race gas could do for this set-up, obviously with just timing adjustments because the turbo itself is already out of breath.
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Old 05-05-2009, 05:38 PM   #12
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Quote:
Originally Posted by C J View Post
So I have never really thought about doing cams in the the STi before but have done them in Honda's, SBC's, etc.

Does the motor have to come out to do them? I cannot see how you could do it otherwise.
I have heard of several techs brag about being able to take the heads off with the engine in, but I know tons of DIY's that can pull the engine out and get the heads off before you can do it with the engine in.
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Old 05-05-2009, 05:40 PM   #13
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how come not many subarus run 280 cams? is it really not a streetable cam?
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Old 05-05-2009, 05:41 PM   #14
C J
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Quote:
Originally Posted by 4ST-AIR View Post
I have heard of several techs brag about being able to take the heads off with the engine in, but I know tons of DIY's that can pull the engine out and get the heads off before you can do it with the engine in.
I see, I guess that makes sense.
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Old 05-05-2009, 05:44 PM   #15
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AMR, with their miracle dyno delivers another "proven" power increase!

From 201 whp stock to 342 whp... on stock turbo without meth. Yeah, right.

(the gains from cams might be real, no argument here)
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Old 05-05-2009, 05:45 PM   #16
Steve.804
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Quote:
Originally Posted by Audiosavvy View Post
I'm surprised to see the increase in power EVERYWHERE, I would have thought it would have bumped the powerband to the right a bit. Impressive....
Agreed.
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Old 05-05-2009, 08:02 PM   #17
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oops.
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Old 05-05-2009, 08:28 PM   #18
LatentWagen
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so you drastically change the cam profiles, and the dyno graph looks like you turned up the boost 4psi? spool is better? huh?
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Old 05-05-2009, 08:43 PM   #19
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Please send these to another independent, non-biased shop for confirmation of these results. We are waiting. Seems too good to be true.
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Old 05-05-2009, 09:50 PM   #20
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Quote:
Originally Posted by ownnij View Post
how come not many subarus run 280 cams? is it really not a streetable cam?
Chapter 3 > Poncams http://www.tomei-p.co.jp/news/Report-EJ25-V1.html#C3.3 . Granted testing was only done on the EJ255 (not EJ257). Basically, they found that usdm heads suck bad enough that they won't allow peak hp past 6k rpm (even with a larger cam) because they simply cannot flow enough air. Headwork or jdm sti cylinder heads would be ideal for any cam upgrade.
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Old 05-06-2009, 10:19 AM   #21
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Quote:
Originally Posted by midnite_wrex View Post
so you drastically change the cam profiles, and the dyno graph looks like you turned up the boost 4psi? spool is better? huh?

Spool was increased. Boost level stayed the same.


Quote:
Originally Posted by cpturbo View Post
Please send these to another independent, non-biased shop for confirmation of these results. We are waiting. Seems too good to be true.

You are forgetting that the 2008 Subaru STi has DUAL AVCS. Anyone who has tuned a 2008 STi knows how much gain is found with the tuning of BOTH AVCS. The 2008 STi also has a slightly different turbocharger than the older models.



-Rob
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Old 05-06-2009, 10:52 AM   #22
All4bSpinnin
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awesome... iirc, cams can be installed without pulling the motor, its just a pita... correct?

keep up the good work rob!
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Old 05-06-2009, 11:54 AM   #23
vik_wrx
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wild!
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Old 05-06-2009, 11:57 AM   #24
Tuner1
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Very nice. Around what I would expect from good, mild cams. Are these regrinds or new billets?
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Old 05-06-2009, 12:59 PM   #25
scramjett
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Damned good numbers on a VF48! You know, since joining the Subie crowd last year I have often wondered why no one ever talks about swapping cams. You look at other car forums (NA cars) and its always intake, exhaust, and cams... But not so with the Subie people; its intake, exhaust, and turbo...

I like that it looks like it holds 300whp all the way to redline... Gives me faith about my build that I'm trying wrap up this week. Granted I don't have dual AVCS but they do make cams for the single AVCS and it's something I am considering if I ever get rid of the stock internals.
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