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Old 01-13-2009, 07:08 PM   #1
RallySport Direct
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Default RallySportDirect, APS SS45 Turbo, 2008 STi

With the arrival of the new APS SS42 and SS45 turbo, we knew it was a matter of time till we put one on the 2008 STi we have here to see what this turbo could do.




The APS SS45 turbo is a 45lb wheel in a TD06 20G 8cm^3 housing. So pritty much the largest 20G.

Now on to the car.
2008 STi 17000 Miles

Power Mods:
APS SS45
APS Bypass Valve
Invidia V3 Catless Down Pipe
HKS Legamax Jasma Legal cat back (65mm, 2.55").
HKS Racing Suction intake
DeatschWerks 750inj
TXS Up-Pipe
Samco IC hose kit
HOA Boost control Solenoid
Cobb Tuning Access Port
Cobb Tuning Pro-Tune. Thanks John


Elevation:
5000ft
Temps: mid 50's
Fuel: Utah winter 91 Octane (10% alcohol). Worst gas EVER!




The comparison you see is of a STG2 2008 STi (new calibration of the Mustang Dyno at Cobb tuning is ruthless. Putting Stg2 2008 STi's at 250WHP), talk about a heart breaker . But we all know, its not about the HP numbers, its about the before and after comparison.

First and foremost, this turbo needs AIR! We tried to see what the car could do with a stock Air intake Box, using a drop in filter. And the numbers where a bit disappointing to say the least. It was apparent that we needed to free up the flow going in and out. So we decided to put on a HKS Racing Intake, and the results are amazing to say the least!




After doing the re-tune for the intake, we ran into another problem. The 65mm cat back on the car started backing up the motor in the higher RPM(past 6K), not allowing us to run more then 18degrees of timing. The boost is set at 22PSI tapering to 17psi by redline. Giving a safe and conservative tune, that will make the car easy to drive at the road course. So next up will be a 3" cat back, and the power should jump up another 15-20WHP! Then add a larger TMIC, and another 10WHP or so will be had

As you can see, the turbo is spooling up relativity fast compared to other 20G turbo chargers. The power delivery is very smooth, and the car drives similar to stock around town. The biggest difference was noticed after 4000RPM, the car now pulls ALL the way to redline. Which is something the stock VF48 could never do. And if you notice, the power and tq is up from stock everywhere past 3600RPM.

Overall impression: This is a great turbo for anyone looking to get more power out of their car with out stressing out the motor. If you notice, the powerband is very smooth, and consistent, giving you solid power from 3500RPM all the way to redline. A 3" cat back would have yielded about a extra 15-20WHP from 6000RPM to Redline, but thats a different write up.

To sum this all up, the power jumped 50WHP and 50WTQ by just bolting on the Turbo, and injectors on top of a stg2 car. Not bad

Thanks
Kirill
RallySportDirect.com
801-748-4910 ext 1006
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Last edited by RallySport Direct; 04-02-2009 at 04:36 PM.
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Old 01-13-2009, 07:22 PM   #2
SUBYS R US
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Did christian tune it?
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Old 01-13-2009, 07:23 PM   #3
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John did
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Old 01-13-2009, 07:26 PM   #4
SUBYS R US
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Why did you not go catless? Are you going to upgrade the TMIC?
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Old 01-13-2009, 07:27 PM   #5
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Quote:
Originally Posted by SUBYS R US View Post
Why did you not go catless?
With the intent of running 110octane at the track.
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Old 01-13-2009, 07:29 PM   #6
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Quote:
Originally Posted by RallySport Direct View Post
With the intent of running 110octane at the track.
it seems like good number but is the coswroth FMIC worth the money?
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Old 01-13-2009, 07:30 PM   #7
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Quote:
Originally Posted by SUBYS R US View Post
it seems like good number but is the coswroth FMIC worth the money?
This is on a stock TMIC.
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Old 01-13-2009, 07:34 PM   #8
SUBYS R US
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Quote:
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This is on a stock TMIC.
I know but will there be a future upgrade of the intercooler and is the cosworth worth the money
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Old 01-13-2009, 07:45 PM   #9
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Cost of turbo?
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Old 01-13-2009, 07:51 PM   #10
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awesome!
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Old 01-13-2009, 08:16 PM   #11
SUBYS R US
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Quote:
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Cost of turbo?

http://www.rallysportdirect.com/shop...ee2309&x=7&y=6

1300
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Old 01-14-2009, 01:20 AM   #12
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Kirill Stikes again! Have you sold the VF48/ injectors yet?
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Old 01-14-2009, 09:48 AM   #13
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thats a 2.4" inlet?
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Old 01-14-2009, 09:56 AM   #14
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awesome work guys!!! and look at the spool!!!

ultra large turbos ftl!!!

quick response and good power!!!! keep up the good work!
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Old 01-14-2009, 10:37 AM   #15
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Thanks for the nice R&D - kudos for the contribution.

So from what I can tell this is different from other TD06H - 20G's in that it has:
1) Inconel wheel - is it lighter?
2) Custom housing - maybe better? Is turbine housing like 7cm or 8cm 20G?
3) 18psi actuator - seems a bit high, but should help build boost.
4) Looks nice - what kind of coating is that - just paint or ...?

Anything else?
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Old 01-14-2009, 12:31 PM   #16
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Quote:
Originally Posted by EGY5 View Post
thats a 2.4" inlet?
It is a 2.4" standard inlet. However the outlet is a little bigger then the standard, so we had to put a Samco IC hose kit on to make it fit over the outlet.
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Old 01-14-2009, 12:39 PM   #17
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Quote:
Originally Posted by klattery View Post
Thanks for the nice R&D - kudos for the contribution.

So from what I can tell this is different from other TD06H - 20G's in that it has:
1) Inconel wheel - is it lighter?
2) Custom housing - maybe better? Is turbine housing like 7cm or 8cm 20G?
3) 18psi actuator - seems a bit high, but should help build boost.
4) Looks nice - what kind of coating is that - just paint or ...?

Anything else?
1) Inconel Wheel is better for heat , and keeps heat out of bearings much better then standard wheels.
2) APS cast their own housings, so the quality of the casting is top notch.
3) The 18PSi actuator is nice, as you stated helps build boost a bit faster, and is nice for guys who want to just run WG pressure.
4) Its just APS paint, similar to what they coat their Intakes and Intercooler pipes with.

Only side note, is this turbo was designed for the GD chassis. So the WG actuator sits on top of the turbo, instead of the side like OEM. Causing some clearance issues with a Stock TMIC. So at this point we are not advertising this is a bolt on to the GR chassis. But will work with no problems on the previous cars. Or if you have a FMIC setup on a GR Chassis.
Also the oil line supplied for this turbo is for WRX's and for 2007 STi's. So if you have something other then that, you might need to get a new oil feed line. I talked to APS about this issue after we already got this turbo on our 08 STi. And they said that the stock feed line should work.

And the last thing, as with any 8cm^3 housing, like the Bloush Dom series, the engine block will need to be slightly ground down about 1/4" near the bell housing to allow the turbo to sit on flat on the up pipe flange.
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Old 01-14-2009, 01:11 PM   #18
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Quote:
Originally Posted by RallySport Direct View Post


After doing the re-tune for the intake, we ran into another problem. The 65mm cat back on the car started backing up the motor in the higher RPM(past 6K), not allowing us to run more then 18degrees of timing. The boost is set at 22PSI tapering to 17psi by redline. Giving a safe and conservative tune, that will make the car easy to drive at the road course. So next up will be a 3" cat back, and the power should jump up another 15-20WHP! Then add a larger TMIC, and another 10WHP or so will be had

First off you say 22 psi. The dyno says 20.8 Kirill you are at 21 psi if you round up, not 22. Conservative would be 19 psi peak tapering to 17 at redline and 15 degrees of timing advancement. Your not on a "conservative" tune for 91 octane pee gas.

I am glad that you are happy with your tune. Now get the proper supporting mods!!!!

I don't mean to be a critique Kirill, I just like to give you crap. Kind of like how Les likes to give me crap about my Dom III.

Edit: Kirill remember when I said that for some reason Cobbs dyno always gave the same power numbers when You use my formula for torq and hp. Peak boost multiplied by 15.2 equals peak torq. and peak boost at redline multiplied by 18.2 gives peak hp +/- some 5-10 torq/hp. give it a try... 20.8 x 15.2= 316 (you were 311) Your dyno shows about 16.5 psi at redline... 16.5 x 18.2= 300.3 (you are 297) seems pretty accurate. The formula also works for the stage 2 dyno you posted. Looks like they have it calibrated back to the old calibration bud.

Last edited by Stames_wiltz; 01-14-2009 at 01:19 PM.
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Old 01-14-2009, 01:43 PM   #19
RallySport Direct
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Quote:
Originally Posted by Stames_wiltz View Post
First off you say 22 psi. The dyno says 20.8 Kirill you are at 21 psi if you round up, not 22. Conservative would be 19 psi peak tapering to 17 at redline and 15 degrees of timing advancement. Your not on a "conservative" tune for 91 octane pee gas.

I am glad that you are happy with your tune. Now get the proper supporting mods!!!!

I don't mean to be a critique Kirill, I just like to give you crap. Kind of like how Les likes to give me crap about my Dom III.

Edit: Kirill remember when I said that for some reason Cobbs dyno always gave the same power numbers when You use my formula for torq and hp. Peak boost multiplied by 15.2 equals peak torq. and peak boost at redline multiplied by 18.2 gives peak hp +/- some 5-10 torq/hp. give it a try... 20.8 x 15.2= 316 (you were 311) Your dyno shows about 16.5 psi at redline... 16.5 x 18.2= 300.3 (you are 297) seems pretty accurate. The formula also works for the stage 2 dyno you posted. Looks like they have it calibrated back to the old calibration bud.
On the street its hitting 22PSI. For some reason the car always runs a extra 1-1.5 PSI on the street.
As for the tune, the new 08's can take quite a bit of timing. We tried to run 21 degrees at redline, but the car would not have it past 6500RPM. However when we did run 21 degrees, it made a extra 15WHP, and 10WTQ. I was next to John when the car was getting tuned, trust me we tuned it back quite a bit from where we would have liked to run the car.
Stupid Utah winter gas!

As for the calibration. Mustang sent Cobb new parameters to enter into the dyno. The last time I want in for a stg2 pro tune, the base line was 268WHP, not the 249WHP it puts the same cars at.

James, now go get your meth kit in. Get tuned, and come play at snowcross this weekend .
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Old 01-14-2009, 01:57 PM   #20
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I doubt that the stage 2 run that you had was a protuned one. You were protuned. When you raced brody with his 08 STi and your protune map on his car, you barely pulled on him past 5,000 rpm with your new turbo and his stage 2 protune. When Cobb does a protuned stage 2 they don't set it at 19 psi, they tune it to 20-21 psi peak and run it till the turbo chokes. The maps notes for the OTS stage 2 STi on 91 octane is 18.5 +/- 0.8 psi. http://www.accessecu.com/accessport/...091%20v102.pdf

your old protune shows that... OTS map 19 psi, protune map 20 psi plus. Your old protune dyno below



I am not doing the snow cross because my car doesn't touch the streets as long as snow is on the ground. The car will be out in march to get the kit tuned. Then we can play!
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Old 01-14-2009, 02:04 PM   #21
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You are correct, the car barely pulled on him. Kinda sad, but that just showed me that the turbo needed more air. The stock intake was restricting the turbo quite a bit, as you can see from the pre and post intake tune.

The problem is that the stg2 tune was done at the dyno out at miller, and the turbo tune was done at Cobb's facility. So we did not have the data to overlay the new and old tune.
Another thing to remember, this is done on a 2.55" cat back. At 400crank HP, that is simply not a big enough system. We started to see this as a issue with race gas on a pro-tune, and now it is becoming even a bigger issue with a larger turbo.


As for your car being on jack stands, its sunny outside, the air is cold, and your car is in the garage. Weather for the weekend is looking to be in the 40's and no snow. So come out and have some fun. And as for playing, I will see you out at MMP for the 1st Lap battle . Just make sure you bring some sticky tires

Last edited by RallySport Direct; 01-14-2009 at 02:13 PM.
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Old 01-14-2009, 03:40 PM   #22
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tempting, it REALLY is, but I still get salt caked all over my work vehicle. I washed it on Sat.


The last thing I want is salt all over my car and undercarriage.

I was tuned initially on cobbs mmp dyno for pump and then the next week I went to cobbs HQ where they did further clean up and then race fuel tune. The calibrations were the same on both dyno's kirill. In non-russian, I made the same whp on both dyno's with my pump fuel calibration.

Back on topic... Why would I choose this turbo over say a Blouch TD06 20G 8cm^2 hotside turbo?
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Old 01-14-2009, 04:12 PM   #23
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Quote:
Originally Posted by Stames_wiltz View Post

Back on topic... Why would I choose this turbo over say a Blouch TD06 20G 8cm^2 hotside turbo?
For that one I dont really have a input. But both are great manufactures. It would be nice to see a comparison of both on the same dyno same day, but that will almost be imposable to have happen.
The APS comes with a higher pressure WG actuator, Inconel wheel, in house casting of the Hot sides. Im assuming that the wheel design is different from one to the other, so that will effect peak HP and the way the turbo spools up. So the Bloush might make more top end power, and the APS might spool up faster. But with out having both turbos tested back to back on the same model car with the same mods its hard to tell.
However the APS seems to be cheaper, and already comes with a upgraded actuator at no extra cost, and also includes a oil line with it.
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Old 01-14-2009, 08:40 PM   #24
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suppose you Ported a turbo like this... any benefits?
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Old 01-14-2009, 08:57 PM   #25
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This is my problem with the inconel wheel. I understand the heat benefit, but inconel is heavy. That would make the turbo spool slower IMO. The ss45 is a 45 lbs min turbo, so it should be capable of 10 hp more than the 20G. I don't know, I am not sold on it. I personally would rather have the ATP GT3071R or the Blouch Polka pickle 2.5. slightly more top end and ball bearing is baller yo!
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