TopSpeed Motorsports | 2011 STI Dom1.5 Testing Complete!!!

Today we finished the testing on our 2011 STI with the Blouch Dom 1.5 Turbo. We have done countless Blouch 20g XT builds here at TopSpeed, but no one had ventured out to try the ball bearing Dom 1.5. We were honestly floored with the results!

What we look for in a stock location turbo is something that we can keep drive pressures down on, still spools quickly. A lot of the bigger stock location turbos do not appeal to use because of the high drive pressures and laggy nature. We feel that you have to give up so much power curve most of the time that its better to stay with either the smaller stock location, or just bite the bullet and go rotated.

This turbo however surprised us! We are very happy with the curve, power, spool and top end performance. This test was done using an 8cm hotside, however we will be swapping to the 10cm to see how much power band we give up. I would recommend this turbo to anyone looking for great power, and a huge broad power band!


TopSpeed Motorsports 2011 STI Project Car:

Numbers
Dyno: Dyno Jet
Tuner: Douglas Wilks
Wheel HP: 377.61
Wheel TQ: 415.01
Ambient Temp: 85.47 F (23% Humidity)
Elevation: 1000ft (EST.)
Boost: 21PSI Peak
Fuel: 93oct Pump Gas

Car Info
Year: 2011
Engine Management: Cobb AP
Turbo: Blouch Dom 1.5
Intercooler: Stock
Meth Kit: None
Injectors: Injected Dynamics 1000cc
Intake/Inlet: Stock Air Box/Perrin Inlet
Headers: Invidia Race Headers
Uppipe: Invidia
Downpipe: Invidia
CBE: Invidia

TopSpeed Tuner Review
http://www.iwsti.com/forums/review-sti-tuners/95024-top-speed-ga-61.html



Future plans:
- testing 10cm Hotside


Thanks for looking, feel free to ask any questions.

~Cicio




GRAPH OVERLAID WITH THE STOCK TURBO PLOT



**EDIT
Here is an overlay of the Dom1.5 8cm & a 20gXT 10cm

This will be a better compairison once we do the 10cm testing on the Dom1.5, but this will give you guys an idea.

As you can see the 10cm barely outflows the 8cm up top with the 1.5, while the 8cm 1.5 kills it until 6k RPM

More to come guys.

~Cicio

 

Damn, nice power band!

 

How does this compare to a 20gxt 10cm?

 

Holy Shit, is that a Subaru on a dyno? Haven't seen one of those for a while. Nice numbers, especially for a stock location.

 

Topspeed,

What mods were installed when the stock turbo plot was dynoed?

 

very nice numbers, that thing spools pretty quick
how large is the hotside on this?

 

It spools faster and makes more power! FTW

LOL Brian,

If I posted every time there was a Subaru on our dyno I wouldn't get anything else done.

All of the same mods minus the turbo.

8cm hotside...we are testing the 10cm later this week when we have time.

 

Very nice indeed! What you think this turbo would do on a 2.5L hybrid swap like my old setup?

 

just purchased one of these from topspeed... cant wait to see my numbers!

 

Topspeed, can i officially request you overlay this dyno graph with that of a somewhat typical 20gxt car?

I am very much in the market. But would love to see the difference in spool characterstics graphically before i decide.

 

I not sure about the spool difference on the dyno.. but let me tell you this thing feels just like the stock turbo on spool.. Honestly if I let anyone drive it they wouldn't know the turbo was upgraded. This is my 4th subaru I have owned and I didn't want to sacrifice the down low tq for some laggy turbo. I have driven plenty of 20gxt turbo's and they to spool really nice, but you can totally tell the difference on the street from stock.

 

i hope i can tell the turbo has been upgraded

 

I was talking about the response... of course you can feel the power difference.

 

**First post updated

Here is an overlay of the Dom1.5 8cm & a 20gXT 10cm

This will be a better compairison once we do the 10cm testing on the Dom1.5, but this will give you guys an idea.

As you can see the 10cm barely outflows the 8cm up top with the 1.5, while the 8cm 1.5 kills it until 6k RPM

More to come guys.

~Cicio

 

Thats odd, that 20gxt graph doesnt look anything like the this 20gxt pump gas map(yes i am refering to pump gas map, not the 440whp e85 map).


--Blouch 20G-XT with 10cm hotside
--Full Invidia Turbo-back N1 Style Exhaust
--TiTek UEL (unequal length) headers and 3-bolt Up Pipe
--TopSpeed Silicone Turbo Inlet
--Cobb Short Ram Intake
--Blitz Filter
--AccessPORT Engine Management
--Exedy OEM Replacement Clutch
--ACT Streetlite Flywheel
--Halman Manual Boost Controller
--Forge BPV
--850cc Deatschwerks Injectors
--Walbro 255l Fuel Pump



Why does the 20gxt you posted spool at 4250 and the one i posted spool at 3700(almost 500 rpms difference?).

EDIT: i assumed the above dyno was done on ts's dyno, i could be wrong. I know it was tuned by doug though.

 

4th gear pull on the dyno vs. 3rd is the difference. 4th gear loads the car much closer to how it is on the street, however we don't always pull 4th if its really hot in the shop due to inadequate cooling with a fan.

Thanks for pointing that out though.

~Cicio

 

Roger Cicio, thanks. Didnt realize a different gear on the dynos made the graph look that different.

 

Should be making the switch to E85 tonight... giggity

 

http://www.bigassfans.com/

 

boom?

 

I sell those...but that's a small one, and you don't want one of them if you're looking to cool down cars.

 

How'd the E85 go?

 

Doug installed the fuel pump then got pulled to another project....

I think he is going to put it on the dyno today. Knowing him its probably 99% road tuned by now LOL

 

LOL. Are those 1000 ID's gonna be enough for E85?

 

Oh yeah..

1000s will make over 500 on E in a Subaru

 

yet the Army uses them to cool down helicopters, weird

 

470 tq and 443 whp ---that freaking fantastic for a stock location turbo.

 

The car made 443whp and 470tq running 26psi peak falling to 24.5psi at redline. However fuel pressure was starting to drop on that run so I stopped there.

Currently the car only has the deatschwerks high flow fuel pump which doesn't seem like its really flowing more then a walbro (who knows).

So I plan on installing an additional inline fuel pump and an aeromotive fuel pressure regulator at the same time to control the addition volume of fuel.

Once I can get the fuel delivery fixed I will finish tuning the car with the 8cm housing installed. Pull it off the dyno and install the 10cm housing I have and test to see what the power and spool difference will be.

 

Oh so you are still on the 8cm? Wow. What's your impression of this turbo on a non-AVCS 2.5L engine?

 

Here is the graph compared against the 20gxt. Both cars are dual avcs sti's with the exact same setup.. header, downpipe, tmic, etc.. Both cars were run on E85 at 25psi avg. You can see from the graph the dom1.5 spools much faster giving you over 70ft/lbs of tq more down low.

Red run is the Dom 1.5 with 8cm housing
Blue run is the 20gxt with 10cm housing

 

stock motor?

Holy crap.

 

Didn't Bank's 2010 with a 20GXT make the same power as the DOM 1.5

I'm pretty sure it was 440hp and 470 tq. Can't remember for sure.

 

Surely you have them both being dyno'd in the same gear somewhere.

 

That is Banks car... in the same gear. Highest run of his actually

 

Oh... actually banks car did make more power then that but it was pulled in a higher gear.. so it wouldn't be an accurate comparo

 

This is not a fair comparison because the 20gxt run was made in 4th gear which will make it spool faster and load it harder so it will make more boost and power. Even still the the dom1.5 spools almost the same but still makes more power. So yea... 3rd gear run (dom1.5) vs 4th gear (20gxt)

Had I not had the fuel pressure issue I would have pulled 4th gear, which would have been really interesting. But I always tune in 3rd first and once the car is safe (afrs, timing, etc) I will make a long 4th gear run.

 

Thats also 8CM vs. 10CM up top...looks like the 8CM DOM 1.5 is flowing a little better

 

10cm is installed and tuned dude.....quit slacking and update us (even though I'm up to date sorta thanks to FB)!

LOL

 

been crazy busy here... tuning 3 cars a day. I will get an update soon

 

I was actually talking to Cicio....lol :rofl::wiggle:

 

Just spent all day yesterday beating the CRAP outa the sti at Roebling Road. Went though 50 Gallons of E85 there with no issues. Whats even more impressive is that I am still running the stock radiator and even in the 100+ temps I never once had a cooling issue.

Fastest lap of the day for the sti was a 1:19.6 which is pretty freaking good for the 245 dunlop direzza starspec's I have on the car.

Can't wait to see what she will do once I get a little more done to her..

 

Would a set up like this work on a 2011 WRX?

 

Most definatley.

 

Not without swapping alot of parts... the 11wrx runs the LGT style turbo.

 

Yeah but it'll still work well I would think.

 

Intercooler, inlet...you'd probably also want to do injectors, fuel pump..what else?

 

probably the intake manifold among other things

 

No you get an adapter. The plastic manifolds are better than the metal ones.

 

new clutch

 

and flywheel