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Old 03-07-2009, 01:42 PM   #1
TopSpeed
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Default TS Inc's 08sti - 424hp 385tq and 34.2mpg (AMS GT35R w/ DW850CC Tested)

I will continue to add to this thread as all the testing is completed.

I had to make a post because I was never expecting it to make this much power with so many stock pieces and such few power mods.

I have the privelage of testing the new AMS Rotated GT35r turbo kit on my personal 08sti. This kit was made for the 02-07 impreza so I had to adapt it to work on my 08sti, which meant modding a few pieces like the intake and downpipe so the ones pictured are not AMS's pieces FWIW. But I would expect with in the next few weeks AMS will have the new pieces Jigged up for the 08sti so have no fear 08sti guys I am sure they will have you covered. For everyone else their kit will bolt right up and honestly it should only be about a days worth of work. It comes with very detailed instructions so I assume anyone with a basic mechanical skill could do the install. If not then give us a ring and we can get you hooked up


The AMS turbo kit's quality is second to none... I have yet to see such a well built kit. Hands down this is the most complete kit I have ever seen. From the time the box arrived I have been amazed. Every piece in the box was packaged in expanding foam to keep it safe. Every nut, bolt, zip tie, hose, clamps, etc.. that you could ever need to install the kit was also there. Not once did I have to run and find a bolt or hose to make it work. AMS has once again come through with a winning piece. I can say without a doubt that it gets the TOPSPEED STAMP OF APPROVAL!!

I plan on doing alot of testing with this kit since its on my persoal STI. My first plans are to switch out the current .82ar Tial V-band to a .63ar tial housing. I will post the dyno results when I do so, but as it sits now I am again surprised by the tial .82ar housing. Currently I am seeing 14psi @3600rpms and then 20psi @3900rpms. This is outstading for a .82ar housing as usually we don't see 20psi till low to mid 4k rpms. .

Deatschwerks also provided me with their very nice 850cc topfeed injectors, which are by far the nicest set of 850cc I have tuned. I have tuned on every type and brand of injector made and these DW850cc injectors are the $h!t, they start idle and drive just like factory everytime. I highly recommend anyone looking for a set of injectors to purchase a set of Deatschwerks and never look back.

Since this is my car and my DD I like to do things outside of the norm, so the car is setup to run the factory 08sti TMIC which in my opinion is a very well built piece. The fin density and core size is unbeatable, I have yet to find an intercooler that I think will beat the new stock sti's piece at a sub 500hp power level. The previous year sti's I could make about 400-430whp before the TMIC was just tapped out of flow. Well as some know the new 08sti runs a much larger factory TMIC which is why I wanted to push it. I had expected it to do well and support 450-500whp. While on the dyno doing 4th gear pulls the TMIC never got hot, hell it was barely warm to the touch. I was expecting it to work well but at this point I am beyond amazed... only thing I can attest it to is the fact that at 20psi the GT35r's output air temps are pretty low.

Clearly the combo of these few parts work very well.




I will post more as I do more testing.

MODS" (yes all four)

AMS GT35R TURBO KIT
DEATSCHWERKS 850CC TOPFEEDS
UEL 4-1 HEADER
COBB apV2 - Tuned by myself of course

Still stock but to be upgraded

Stock Catback
Stock Intercooler
Stock Fuel Pump
Stock Longblock w/tgv's
Stock Clutch

I am sorry about my crappy pics all I had was my phone

Doug W.
TopSpeed Inc.



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Last edited by TopSpeed; 04-29-2009 at 12:33 PM.
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Old 03-07-2009, 01:42 PM   #2
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Update April 29, 2009:

I have been on the road a lot lately doing some tuning trips which has given me ample time to dive into the inner workings of the 08sti's ecu. By datalogging and recalibrating over and over the timing, fuel, and the cams I have been able to extract some wicked MPG with my new setup. All the while keeping the smooth driveablity and max power the same. So now there is no need to load an economy map since its all tuned on one.

Between the awesome Deatschwerks Injectors, AMS Turbo kit, and some really good tuning I can proudly say I have achieved the perfect setup. Not only is the car nice and quiet like stock, gets amazing gas mileage, it also makes a ton of power.

How perfect you say? How about for this last tank of gas I have driven 210 miles and avg 34.2mpg and still make over 420whp.

Who says you can't have your cake and eat it too..


Last edited by TopSpeed; 04-29-2009 at 12:31 PM.
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Old 03-07-2009, 01:42 PM   #3
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Hold for more testing
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Old 03-07-2009, 01:51 PM   #4
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In your opinion how did this kit compare to the Full Race kit?
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Old 03-07-2009, 02:00 PM   #5
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Quote:
Originally Posted by nxttruck2002 View Post
In your opinion how did this kit compare to the Full Race kit?
Hard to compare since they are on two different cars. I will say quality of the welds and parts is about the same. However we had a bunch of fitment issues with the FR along with missing pieces and I had none with the AMS kit other than the changes needed for the 08sti fitment.
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Old 03-07-2009, 02:05 PM   #6
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WOW!!!! Awesome job Doug. over 420whp with just those four mods...WOW!!! I can't wait to see how this progresses.

Can't wait to see how this car ends up!

Keep us posted.

Special thanks to Doug and everyone at Top Speed for doing this test and putting in the work to see how this kit would run on an 08sti

Eric
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Old 03-07-2009, 02:10 PM   #7
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Quote:
Originally Posted by AMS View Post
WOW!!!! Awesome job Doug. over 420whp with just those four mods...WOW!!! I can't wait to see how this progresses.

Can't wait to see how this car ends up!

Keep us posted.

Special thanks to Doug and everyone at Top Speed for doing this test and putting in the work to see how this kit would run on an 08sti

Eric

Thank you sir!!

I too look forward to the things to come.. Now I just need you guys to build that intercooler we taked about

Doug
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Old 03-07-2009, 02:17 PM   #8
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hahahah working on it buddy!

Eric
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Old 03-07-2009, 02:38 PM   #9
Super Nintendo
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Impressive Doug! Very surprising results with a stock TMIC.

-Ty
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Old 03-07-2009, 04:33 PM   #10
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go AMS, nice numbers
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Old 03-07-2009, 04:45 PM   #11
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very nice....thats pretty cool you tested the kit with just the minimal mods you have on.....it will be a good tester to see what you add on what works well and what doesn't
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Old 03-07-2009, 04:48 PM   #12
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Looks good man, nice start.
Whats the spec on the ENKEI's

On a side note, where are you getting a good tacho signal on the 08's, I tried on the main coil FB connector and failed due to too much noise, never had an issue on my 06 , any recommends? appreciate
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Old 03-07-2009, 05:03 PM   #13
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Quote:
Originally Posted by blowbyu24 View Post
very nice....thats pretty cool you tested the kit with just the minimal mods you have on.....it will be a good tester to see what you add on what works well and what doesn't
Those are my plans. I test the parts all over again just like I did when I was STG2, I did the downpipe and then a tune. Then added a catback and found that the Catback added no power, so I removed the catback. Then an intake and again no power so I removed it.

I will again test the limits of the factory parts to see where I can gain power, and where people are just spending money on useless parts because of hype.

This is what I enjoy doing


Doug
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Old 03-07-2009, 05:05 PM   #14
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Looks good man, nice start.
Whats the spec on the ENKEI's

On a side note, where are you getting a good tacho signal on the 08's, I tried on the main coil FB connector and failed due to too much noise, never had an issue on my 06 , any recommends? appreciate
18" x 10" +38 RPF1 With 285/30/18 AD07'S.

I used the #3 coil pack and pull the signal from the middle black wire on the connector. As long as you have a smooth timing curve and a fairly new inductive lead it shouldn't loose the signal.
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Old 03-07-2009, 05:07 PM   #15
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Quote:
Originally Posted by Super Nintendo View Post
Impressive Doug! Very surprising results with a stock TMIC.

-Ty
Thanks, I knew the 08sti intercooler was going to be good just didn't know it was going to work so well. Then again if someone like myself never pushed it nobody would have know.

Also don't forget this is done with the factory cat-back too.

Next week I will be down in florida tuning, but when I get back I plan on swapping the cat-back out for a larger one and re-testing.
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Old 03-07-2009, 06:01 PM   #16
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Quote:
Originally Posted by Badazzcr View Post
18" x 10" +38 RPF1 With 285/30/18 AD07'S.

I used the #3 coil pack and pull the signal from the middle black wire on the connector. As long as you have a smooth timing curve and a fairly new inductive lead it shouldn't loose the signal.

Thanks Man, I will give it another try heading to the dyno shortly after round #### of mods...

Keep up the good work
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Old 03-07-2009, 06:19 PM   #17
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Very nice results! Would the 08 STI FMIC work on the 07? Do you think its no worst than say a turboxs tmic?
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Old 03-07-2009, 06:31 PM   #18
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Very nice results! Would the 08 STI FMIC work on the 07? Do you think its no worst than say a turboxs tmic?
It would work, however it wouldn't be much point since its wider then the hood scoops vent. So unless you modify the duct to cover the entire TMIC you would be loosing alot of the benifits.

The turboxs core is a great size, decent fine density but is so thick that once it heat soaks you have a very hard time cooling it down.

IMHO I would run the Stock STi one over it.
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Old 03-07-2009, 07:22 PM   #19
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Wow those are incredible results for so few mods ! I am really excited to see how she would do with 21-23psi no tgv's and .63 Tial housing (my dream setup ).
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Old 03-07-2009, 07:33 PM   #20
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Impressive numbers. What fuel were you using for the dyno pulls?
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Old 03-07-2009, 07:37 PM   #21
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Shell Vpower 93oct
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Old 03-07-2009, 09:08 PM   #22
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nice results but just for reference, what are your IDC's?
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Old 03-07-2009, 09:15 PM   #23
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84 percent
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Old 03-07-2009, 09:32 PM   #24
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Great info as usual Doug. I have a questions for you. Were you able to do any back to back pulls on the dyno? If so, did the #'s drop due to excessive heat in and around the intercooler? Will the additional airflow on the road combat this issue at all?
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Old 03-07-2009, 09:37 PM   #25
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Quote:
Originally Posted by nxttruck2002 View Post
In your opinion how did this kit compare to the Full Race kit?
My buddy had one of the first 35r kits from Full Race and the fitment was horrible to say the least. We had clearance issues between the firewall and dp, nothing a BFH couldn't fix. The point is the amount of money and how long it took there shouldn't have been any issues whatsoever. I told him he should have waited a little longer for the AMS kit.

Btw the car looks bitchin with those RPF1's.
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