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Old 05-10-2018, 11:57 AM   #2426
subydude
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I'm very interested in your housing testing. I've run the .64 for years for spool, but I'm thinking of doing either TS or SS .85 on the low mount setup.
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Old 05-10-2018, 12:54 PM   #2427
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Quote:
Originally Posted by Homemade WRX View Post


I'm assuming that's at altitude as well, which is really awesome.

Looking at your 44mm gate log up top, I'm thinking my 38mm should be good, as it also has priority flow in the exhaust.
Yep, roughly 5,5xx ft ASL. I imagine your 38 will do fine.


Quote:
Originally Posted by subydude View Post
I'm very interested in your housing testing. I've run the .64 for years for spool, but I'm thinking of doing either TS or SS .85 on the low mount setup.

I thought Airboy had done this test, however, I would love to see it run again.
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Old 05-10-2018, 03:08 PM   #2428
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Quote:
Originally Posted by yamahaSHO View Post
Yep, roughly 5,5xx ft ASL. I imagine your 38 will do fine.





I thought Airboy had done this test, however, I would love to see it run again.
I haven't seen back to back testing on the same car/same setup for a 7163 or 6758 between the housings. I autox with a few BW Engineers that work on the EFR line though and have picked their brains. On cars that have the turbo mounted in the same zip code as the exhaust ports the difference isn't big, but on Subarus it's 400ish rpm (supposedly). I haven't seen a lot of details though.
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Old 05-10-2018, 10:09 PM   #2429
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was that in 3rd or 4th gear yamahaSHO?
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Old 05-10-2018, 10:10 PM   #2430
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4th gear. 3rd is posted as well for I, S, and S#.
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Old 05-10-2018, 10:35 PM   #2431
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Originally Posted by yamahaSHO View Post
4th gear. 3rd is posted as well for I, S, and S#.
Thanks, very good results. I like how you have different boost levels for the different I, S and S# settings
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Old 05-10-2018, 11:04 PM   #2432
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Might as well make use of, essentially 3 on-the-fly maps.

It makes me wish my 05 had SI drive, but I guess permanent S# is good.

I think we are planning on having this car on the dyno in 2 weeks, then we will switch to gas to clean up the low side of the FlexFuel map... Although it's probably pretty close as it is.

I have to install the FlexFuel sensor in my car and retune it... After that, I plan on doing some roll racing vs this car just to see the difference.
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Old 05-11-2018, 12:41 AM   #2433
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Quote:
Originally Posted by yamahaSHO View Post
I thought Airboy had done this test, however, I would love to see it run again.
I familiar with what you're referencing. He did both the 0.64 and 0.85 for the 6758 but no 7163.

https://forums.nasioc.com/forums/sho....php?t=2711435
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Old 05-11-2018, 11:21 AM   #2434
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That's basically what I see in the real world too. The 7163 being limited to the .85 because of wheel aero makes it a harder sell to autox people, but perfect for track or low mount setups.
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Old 05-11-2018, 03:49 PM   #2435
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Quote:
Originally Posted by Homemade WRX View Post
I familiar with what you're referencing. He did both the 0.64 and 0.85 for the 6758 but no 7163.

https://forums.nasioc.com/forums/sho....php?t=2711435
Quote:
Originally Posted by subydude View Post
That's basically what I see in the real world too. The 7163 being limited to the .85 because of wheel aero makes it a harder sell to autox people, but perfect for track or low mount setups.
Yep, that's it. I look forward to the 7163 comparison as well. I can't compare my 6758 to my friends 7163 as he has dual AVCS and I only have single.


As for the 7163 I've recently posted about, the owner got some more E85 and is now up to E77. He's pretty excited about his turbo.



I'll hold off on posting anymore about it until we have a real dyno.
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Old 06-03-2018, 09:26 PM   #2436
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Wish my internal wastegate & 2 port actuator would hold boost up top like this. Maybe I need to put a heavier spring in, currently have a 12lb & about 10mm preload?
Went to put in a heavier spring this afternoon.

Turns out I have the same issue LittleBlueGT had-worn bottom bushing.


https://forums.nasioc.com/forums/sho...6#post45671286
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Old 06-06-2018, 03:46 PM   #2437
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Presently I have a dyno tune scheduled for the 27th so I can get a comparison on the same set up of my 6758 to a 7163 with TMIC on non Dual AVCS. (06 outback xt).

Then recently a prototype turbine housing with integrated quickspool came up on ebay. Without thinking I made an offer and it got accepted. I'm now realising I will have to modify my exhaust because this thing wont just drop in.

Here is a link to what it looks like.

https://forums.nasioc.com/forums/sho...&postcount=100

Should I do it? Will it be worth it? It wont give me same to same comparisons, but it might give me low end of the 6758. I'd like to stop at 500-525 hp and not go much over that. But the housing itself will cost me a 350 and modifying the exhaust may be another couple hundred and it won't allow me to go back to the 6758 without modifying again if thats what I want.

Would love some quick feedback if there is any.
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Old 06-06-2018, 04:17 PM   #2438
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Is it a B1 frame TS with the quick spool setup? You'd have to figure out the volute size but if you got the setup working you "should" get quicker spool than the .64 housing while maintaining the top end of the larger TS .80 housing. Basically the best of both worlds. However, you'll need to setup the system to control the flapper along with modify the exhaust.
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Old 06-06-2018, 05:10 PM   #2439
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That thing is extremely cool!
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Old 06-06-2018, 05:42 PM   #2440
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Quote:
Originally Posted by subydude View Post
Is it a B1 frame TS with the quick spool setup? You'd have to figure out the volute size but if you got the setup working you "should" get quicker spool than the .64 housing while maintaining the top end of the larger TS .80 housing. Basically the best of both worlds. However, you'll need to setup the system to control the flapper along with modify the exhaust.
It seems to be a b1 frame Twinscroll. But the seller has told me the turbine shaft is offset to make room for the valve. I think they literally just modified a b1 twinscroll to make it work. Itís my understanding the Downpipe would need to be modified over what I have and the t25 flange I have would need to be swapped for a t4.

If this will work Iím seriously thinking Iíll do it, but my tuner hasnít worked with a quickspool
Valve before and Iím not sure how to set it up.
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Old 06-06-2018, 06:45 PM   #2441
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It seems to be a b1 frame Twinscroll. But the seller has told me the turbine shaft is offset to make room for the valve. I think they literally just modified a b1 twinscroll to make it work. Itís my understanding the Downpipe would need to be modified over what I have and the t25 flange I have would need to be swapped for a t4.

If this will work Iím seriously thinking Iíll do it, but my tuner hasnít worked with a quickspool
Valve before and Iím not sure how to set it up.
What ECU are you running? It might be possible (with some testing) to run a signal line to it and just know it'll open at X pressure. It'll definitely be some welding on both UP and DP if you're not already setup for that.

Not going to be shy, but if you don't end up using it I might be interested
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Old 06-06-2018, 07:04 PM   #2442
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What ECU are you running? It might be possible (with some testing) to run a signal line to it and just know it'll open at X pressure. It'll definitely be some welding on both UP and DP if you're not already setup for that.

Not going to be shy, but if you don't end up using it I might be interested
Stock ECU.

If the benefits are like 200 rpms faster spool I dont think I am interested in this. If its going to be closer to 500 rpms giving me essentially identical low end response as my 6758 then I AM ABSOLUTELY am probably going to do this. But there is no way of really knowing. I think the benefits are in my favor though considering the effective AR would be lower then my 6758 at lower rpms. But it is a bigger wheel in basically .5 AR vs the 6758 wheel in .64 AR. Might see the numbers in the first post of this thread. Exciting stuff.
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Old 06-06-2018, 08:22 PM   #2443
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It'll be harder on a stock ECU. You'll basically be relying on line signal (pressure) to move the flap vs using an ECU output that could work off throttle/rpm/boost pressure/etc. It'll require some setup, but should technically provide similar spool to a .64 housing and then allow .80 up high.
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Old 06-07-2018, 02:02 AM   #2444
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Quote:
Originally Posted by point78 View Post
Wish my internal wastegate & 2 port actuator would hold boost up top like this. Maybe I need to put a heavier spring in, currently have a 12lb & about 10mm preload?
find my build thread u will find all the answers about efr iwg boost control
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Old 06-07-2018, 10:53 AM   #2445
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find my build thread u will find all the answers about efr iwg boost control
I looked through it, Right on.

I do have a 4port mac & 2port actuator. Turns out the bushing in the actuator has worn & the bottom won't hold pressure any more.

Turbosmart emailed me back & is checking to see if they have any spares.

In the meantime, I put a 4lb heavier spring in, didn't touch my duty cycles, and I'm 25psi tapering to 22-21. (Before was 24 tapering 20-19)
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Old 06-07-2018, 02:42 PM   #2446
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Not going to be shy, but if you don't end up using it I might be interested
Me too!
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Old 06-07-2018, 06:04 PM   #2447
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I really want to try a QSV on my next setup.

The part of it that confuses me is that you're going to end up restricting the exhaust to gain that boost when it's only passing through "1/2 scroll". Will that boost make up for the loss flow? In other words, will it produce more torque in the lower revs, or just more boost?
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Old 06-07-2018, 06:20 PM   #2448
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I really want to try a QSV on my next setup.

The part of it that confuses me is that you're going to end up restricting the exhaust to gain that boost when it's only passing through "1/2 scroll". Will that boost make up for the loss flow? In other words, will it produce more torque in the lower revs, or just more boost?
The guy selling it to me is suggesting I have the QSV fully open at 2-5 psi. He said with the QSV I will be building boost at idle and that I need to be careful.

I dont know anything sciencey or technical about any of this. But it seems to me that the restriction up to 3-5 psi won't be so bad if the valve is fully open by that point.
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Old 06-07-2018, 06:22 PM   #2449
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Originally Posted by T-37 View Post
I really want to try a QSV on my next setup.

The part of it that confuses me is that you're going to end up restricting the exhaust to gain that boost when it's only passing through "1/2 scroll". Will that boost make up for the loss flow? In other words, will it produce more torque in the lower revs, or just more boost?
Don't think of it as boost, think of it as wheel speed and velocity. You have a total flow the housing can handle when open. When the RPM is low velocity through the housing is low. You slam the pedal down and the volume of exhaust increases in velocity through the housing, but it's still not hitting the turbine wheel as quickly as it would at high rpm. So by closing off one half of the housing you're forcing the air to increase in velocity and hit the wheel much faster which spins it up quicker. Then, before you hit choke flow on half of the housing, it flips open so the full housing is available and you continue from there. You're not really losing flow with a QSV so much as increasing velocity at low flow levels and then still maintaining total potential volume at higher RPM.

Technically, it produces more torque down low because you should be able to build more boost down low. Think of it as having a very quick spooling turbo and instead of dying off up top it flips to a bigger turbo and just keeps going.
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Old 06-07-2018, 06:24 PM   #2450
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Originally Posted by Xtea View Post
The guy selling it to me is suggesting I have the QSV fully open at 2-5 psi. He said with the QSV I will be building boost at idle and that I need to be careful.

I dont know anything sciencey or technical about any of this. But it seems to me that the restriction up to 3-5 psi won't be so bad if the valve is fully open by that point.
it's wheel speed. You can't build boost at idle since the bpv would be open and just recirc. If you're familiar with antilag, all it's really doing is keeping the turbine wheel speed around 130k rpm so as soon as you crack the throttle plate it's at basically full boost. It's all about wheel speed here.
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