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