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Old 03-02-2019, 12:07 AM   #26
dud3tt3
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Originally Posted by 2slofouru View Post
That's crazy, I have the full face ACT rated for over 500ft/lbs and it would be a shame if something with that stiff of a pedal could slipe at less than 400. I'm only aiming for around 450wtq but this has me worried. I really don't want a chattery puck disc that eats the flywheel alive.
Are you sure the disc wasn't contaminated with too much grease on the shaft splines or maybe the pilot bearing leaked grease onto the flywheel????
I had a master tech install this motor, he went over everything. No leaks. I've had a **** end on clutches over the last 2 years. First one, the shop poked holes into my transfer case and DENIED it. So then I had my insurance cover transferring the internals over to a new T-case, plus 1st & 2nd gear/sync rows replaced. Put a second new clutch in, new flywheel, then 10 months later the oem throw out bearing went out. replaced with another clutch, stuck with the flywheel bc, it was still new and here we are now slipping.
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Old 03-02-2019, 12:09 AM   #27
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Originally Posted by viper_crazy View Post
Dunno. That's why I asked. It would probably depend how the pipes are oriented and if clearances make it possible. Like I say, it sounds like either way can be just as much of a pain, whether it's time spent to figure out a properly/optimally designed 2-1 single EWG piping, if it's worth it at all, or to drop extra money on two EWG's and have piping and fab work zipped up and be done with it. Ones a pain to time, the other a pain to the wallet. Just depends on perspective, I guess.

My problem is, I have all these ideas and lack proper equipment to make this crap to test it.

I understand, what you are talking about now. I've seen it done, but honestly, I feel its best to stick with a dual ewg for ts.
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Old 03-02-2019, 12:12 AM   #28
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Originally Posted by 3jDriv3r01 View Post
^ is the correct answer. I believe you're maxing out that turbo. What's the turbo rated for ? I read ~470hp. Also why go up to PA, if you live in VA? You have choices in VA and Maryland to get a really good tune.
Lot of the local shops in Va are months backed up, that and I just am not a fan of the shops in general. I heard phenomenal things about the shop in Pa, so I wanted to give them a try.
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Old 03-02-2019, 12:15 AM   #29
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Originally Posted by pcampbell View Post
I agree, Blouch 1.5 XT-R is not that big of a turbo. It's a 480hp (crank hp) turbo and you are making about 480hp, if not more.
I only put 390 to the wheels down. I'm not going for crazy hp, just wanted like 420-450hp. I thought the 1.5 would have been sufficient.
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Old 03-02-2019, 12:19 AM   #30
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Originally Posted by tsrapophis View Post
Another one for too small of turbo. The drivetrain losses are going to be close to 20%, which puts you in the 480 flywheel hp range and out of turbo. Blouch's 470 hp rating is for flywheel, so you did well. I recommend enjoying your throttle response and focus on making it reliable.
Damn, I didnt know it was rated hp to the flywheel. ? Everyone I talked to told me the 1.5 would be sufficient. ugh.

It's a Subaru, do we ever quit? lol
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Old 03-02-2019, 12:22 AM   #31
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Originally Posted by billyboy999 View Post
I've got a similar build. Only major difference is I am running a 20G XT-R, stock headers, and EWG, which probably helps with boost control. EWG is pipped back into downpipe. My tune peaks at 22PSI and holds 20PSI to redline. It makes 395hp/358tq on a Mustang Dyno... and according to my tuner that's a bit conservative.

Clutch slipping with just 360tq is pretty surprising. I run stock clutch, 4-5K launches at autox and no issues. Maybe you should just go back to OEM clutch.
See, the 1.5 is slightly bigger than the 20g. Thus making me believe based on what you put down, that I could definitely break 400hp & tq.

I was expecting to push 23 psi+ but once the clutch started to slip that's where we stopped. I'm thinking of just throwing a twin-disc in there.
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Old 03-02-2019, 02:46 PM   #32
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Originally Posted by dud3tt3 View Post
My downpipe is already divorced, is this just for open an mouth dp?
Your divorced dumpipe (unless you have two pipes coming out of it with one to atmo) is still carrying the same volume of exhaust flow.

The Moore piece completely separates the turbine and WG flow like an external WG and screamer pipe.
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Old 03-02-2019, 03:25 PM   #33
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Originally Posted by 2slofouru View Post
That's crazy, I have the full face ACT rated for over 500ft/lbs and it would be a shame if something with that stiff of a pedal could slipe at less than 400. I'm only aiming for around 450wtq but this has me worried. I really don't want a chattery puck disc that eats the flywheel alive.
Are you sure the disc wasn't contaminated with too much grease on the shaft splines or maybe the pilot bearing leaked grease onto the flywheel????
Having a stiff pedal is not always an indication of how much force a clutch can hold. If the surface material is just bad the pressure plate can't help that.
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Old 03-02-2019, 03:54 PM   #34
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I was expecting to push 23 psi+ but once the clutch started to slip that's where we stopped. I'm thinking of just throwing a twin-disc in there.
Yes, and make sure you use the same master technician you used last time if you like headaches.

Or you could just try a non master technician that knows how to do a clutch job properly and only once.
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Old 03-03-2019, 12:34 AM   #35
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Originally Posted by STIdmod712 View Post
Having a stiff pedal is not always an indication of how much force a clutch can hold. If the surface material is just bad the pressure plate can't help that.
I understand the reason the pedal is stiff, and it's because that's the softest ACT can do and still maintain enough pressure on the disc type to hold the rated torque. They have to consider travel of the oem clutch fork and the disc material into the equation. It's easier to get a higher clamp force with a cerametallic puck type disc than an organic, which can translate into a softer pedal per ft/lb of capability, but I prefer a smoother and quieter engagement for street and daily driving. Only sucks my left leg gets that extreme workout every drive.
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Old 03-03-2019, 08:31 AM   #36
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OP- I feel your pain.

I have the IAG stage 2.5 block, ported heads, valves, springs, retainers on a hybrid setup. Dom 3 with 1050cc IDs. On 22psi I made 400whp and 380wtq I was expecting more as well. But on 93 these motors only go so far. You making what you did on the dom 1.5 is pretty damn good.
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Old 03-03-2019, 12:01 PM   #37
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Originally Posted by Brother EddieJ. View Post
OP- I feel your pain.

I have the IAG stage 2.5 block, ported heads, valves, springs, retainers on a hybrid setup. Dom 3 with 1050cc IDs. On 22psi I made 400whp and 380wtq I was expecting more as well. But on 93 these motors only go so far. You making what you did on the dom 1.5 is pretty damn good.
Are you IWG or EWG?

It's still maddening! For what I wanted goal wise, I was sure it was possible on 93.
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Old 03-03-2019, 12:06 PM   #38
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Yes, and make sure you use the same master technician you used last time if you like headaches.

Or you could just try a non master technician that knows how to do a clutch job properly and only once.

I most likely will, this specific mechanic actually did all of my transmission work, etc. He's no 2 bit mechanic. Like the non master tech who actually ****ed my transmission on the first clutch job. They ruined my transfer case and denied it, and ended up installing it incorrectly, so the catch point was too low. Therefore my 1st & 2nd gears and sync rows were gone.

I will never trust another non-master technician.
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Old 03-03-2019, 08:12 PM   #39
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Originally Posted by dud3tt3 View Post
Are you IWG or EWG?

It's still maddening! For what I wanted goal wise, I was sure it was possible on 93.
EWG, and I lost the flutter with this new setup. It’s either open or closed. Still running the GS ebcs.
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Old 03-03-2019, 08:31 PM   #40
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You're a single scroll turbo right? I have the same ebcs.
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Old 03-03-2019, 11:21 PM   #41
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Originally Posted by dud3tt3 View Post
You're a single scroll turbo right? I have the same ebcs.
Yes. Jr tuned the car, I was told if the wastegate duty cycle is on point you lose the flutter. The car hold 22psi no problem
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Old 03-06-2019, 10:35 PM   #42
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Another vote for too small of a turbo, if you plot it on a compressor map it will be out of efficiency. A standard ej25 is really the flow limit for an 1.5XTR, anything that flows better than that (ie yours) it is too small.

EWG will help as said previously and a few more hp.

A friend of mine did something very similar in V6 engines, had a great setup on oem engine, blew the engine, built the engine to flow a lot more, put the same turbo on and it made less power. Put on the next size up turbo and made heaps of power. The built V6 engine was effectively flowing close to the same amount of air as some V8s so a larger turbo was needed.

Your built 2.7L would flow close to the air of some oem 3L engines. Noone in their right mind would use a 1.5XTR on a 3L engine.

Last edited by Harey; 03-06-2019 at 10:42 PM.
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Old 06-03-2020, 11:29 PM   #43
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Thumbs up UPDATE: 451whp/409tq on 93 @ 22psi

For anyone who cares and or wants to see more results, with twin-scroll builds out there.

I finally reached my goal. Only a few thousand dollars later....

451whp & 409tq on 93 @22psi

What I changed:

I took many people's advice and had a custom fabbed up-pipe to house dual Tial 38mm MVS EWG's for a stock location Blouch1.5 XT-R.

Upgraded Injectors from the ID1050X to the ID1300's

I also pulled the trigger on an Exedy Ceramatellic Twindisc stage 4/5

Also, I had to reroute my power steering lines and went with Chase bay's reroute/relocate kit. (Quality ***** I might add)

This time around, I was MUCH happier with the results. I truly felt the car put down what it should have from the beginning. Not only that, but I also believe I am now benefiting from the twin-scroll on the low end, and these GS2's are benefiting on the top end.

Feel free to follow my IG to see all the goodies!
@dud3tt3
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Old 06-04-2020, 08:58 PM   #44
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lol lol
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Old 06-04-2020, 10:04 PM   #45
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Good to hear and thanks for following up. A lot of threads never get completed.
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Old 06-04-2020, 10:16 PM   #46
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Originally Posted by dud3tt3 View Post
For anyone who cares and or wants to see more results, with twin-scroll builds out there.

I finally reached my goal. Only a few thousand dollars later....

451whp & 409tq on 93 @22psi

What I changed:

I took many people's advice and had a custom fabbed up-pipe to house dual Tial 38mm MVS EWG's for a stock location Blouch1.5 XT-R.

Upgraded Injectors from the ID1050X to the ID1300's

I also pulled the trigger on an Exedy Ceramatellic Twindisc stage 4/5

Also, I had to reroute my power steering lines and went with Chase bay's reroute/relocate kit. (Quality ***** I might add)

This time around, I was MUCH happier with the results. I truly felt the car put down what it should have from the beginning. Not only that, but I also believe I am now benefiting from the twin-scroll on the low end, and these GS2's are benefiting on the top end.

Feel free to follow my IG to see all the goodies!
@dud3tt3
That's pretty crazy considering drivetrain loss, not sure how that much power is making it to the ground with that turbo size. I had no idea a 1.5 would do that, congrats...
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Old 06-05-2020, 11:51 AM   #47
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Originally Posted by Homemade WRX View Post
Good to hear and thanks for following up. A lot of threads never get completed.
My pleasure, honestly, there needs to be more info out there with twin-scroll setups. I've tried to find more relevant info and there's not much. I know a lot of people who just go for that rotated straight-line power. (once built)
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Old 06-05-2020, 11:57 AM   #48
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Originally Posted by 2slofouru View Post
That's pretty crazy considering drivetrain loss, not sure how that much power is making it to the ground with that turbo size. I had no idea a 1.5 would do that, congrats...
I was surprised to actually see 451 my self and only @ 22psi. My tuner was expressing to me that the 1.5 is very similar to a 30R in size? I see a lot of other single scroll/mid-frame setups have to run E85 just to hit mid 400's, which to me kinda seems excessive?


That's another thing when it comes to understanding turbo sizes. I understand was a 6266 is in size but not some of these other manufactures names FP Green and Blouch Dom 1.5, 2.0, 3.0. It doesn't give you a good reference in size.
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Old 06-06-2020, 02:00 AM   #49
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Default I made 390whp/360wtq with my set up. I expected more?

Quote:
Originally Posted by dud3tt3 View Post
I was surprised to actually see 451 my self and only @ 22psi. My tuner was expressing to me that the 1.5 is very similar to a 30R in size? I see a lot of other single scroll/mid-frame setups have to run E85 just to hit mid 400's, which to me kinda seems excessive?


That's another thing when it comes to understanding turbo sizes. I understand was a 6266 is in size but not some of these other manufactures names FP Green and Blouch Dom 1.5, 2.0, 3.0. It doesn't give you a good reference in size.

Congratulations! You have an awesome setup and if you could share some info about your upipe I’d be interested in it.

I did some research on this one a while back and wanted to share what I found.

Gt28=28*2=56mm turbine
Gt30=30*2= 60mm turbine

Gtx has 1mm larger compressor than the Gt variant. Different blade count etc. the Dom units seem to share similar Garrett components less the compressor wheel but strangely enough striking similar to the gtx variants.

I ended up buying a twin scroll dom3, removing the turbine housing and using it on a gen2 gtx3071. With a t04b compressor housing in stock location on my 5eat Outback which started on ACN 91 and is now flex fuel. Very happy with both.

The Dom 1.5 xtr is similar in size to a gtx2871
Dom 2.5 similar to gt3071
Dom 3.0 similar to gtx3076

I’ve taken some measurements and compared the compressor charts. Not stating as fact just my conclusion based on info that I’ve found.

Not sure why companies like Blouch and precision refuse to share the compressor maps, I can tell you that is exactly how I choose a turbo, hence my selection. As was stated earlier-it’s just a pump and the landing points can be calculated.
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Old 06-06-2020, 02:10 AM   #50
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Default I made 390whp/360wtq with my set up. I expected more?

Not sure if it needs to be stated but the last 2 numbers reference the compressor wheel exducer

Gt3076

Gt-ball bearing
30*2= 60mm turbine
76mm compressor

Inducer size will vary if Gt I believe 56mm and gtx would be 57. -sure this will get fact checked.

Dom3
60mm turbine
76mm compressor
57mm compressor inducer
Garrett CHRA.
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