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Old 03-03-2018, 03:49 AM   #2401
turbosenna
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did anyone try oem spec c exhaust manifold with custom up pipe (twin or single scroll) ?

i think oem spec c exhaust manifold could work
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Old 03-16-2018, 01:34 PM   #2402
Hyper
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I was smoke testing exhaust looking for leaks, and noticed I got smoke coming out from the WG actuator arm mechanism on the side of the exhaust housing (TS IWG 7163) - is this normal?

also the v-band is leaking, I am tired of repositioning it and tightening over and over, so I will try that ATP v band gasket
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Old 03-16-2018, 01:37 PM   #2403
subaru_gc8
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A little smoke is fine
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Old 03-16-2018, 02:07 PM   #2404
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Quote:
Originally Posted by Hyper View Post
I was smoke testing exhaust looking for leaks, and noticed I got smoke coming out from the WG actuator arm mechanism on the side of the exhaust housing (TS IWG 7163) - is this normal?

also the v-band is leaking, I am tired of repositioning it and tightening over and over, so I will try that ATP v band gasket
Slight leak out that wastegate shaft is normal, it needs clearance even once hot to move. I can never get the outlet vband to seal well either, but it seals well enough for me, I do try to grease it and let the cat idle until it stops smoking to make a carbon gasket sometimes. I really wish it had the Interlocking flanges like the premium summit racing ones.
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Old 03-17-2018, 02:27 AM   #2405
kellygnsd
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I found that over tightening the V-band clamps had an adverse effect on their subsequent sealing one you loosen them. Also make sure your flanges are square before you tighten the clamp. I dealt with leaks with mine until I changed the clamp and my clamping technique.
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Old 03-17-2018, 04:44 AM   #2406
Hyper
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what is it?
I use a rubber mallet to hit the clamp around while tightening it, and then use ~50 inch lbs torque
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Old 04-01-2018, 03:07 AM   #2407
sergey2007
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Quote:
Originally Posted by Full-Race Geoff View Post
interestingly Subaru EJ engines are really the only applications ive seen pushing oil. and for the most part its only on built engines, leading me to believe the issue has to do with the oil pump selected or the oil used? hard to say with certainty since our customers are in 90 countries and none seem to be near us.

i will say that when you feed a turbo 100psi oil pressure on the bench, it is noticeably harder to spin compared to 50-60psi oil pressure. It appears the excess oil acts as a "brake" and even though the engineers tell me it is a negligible difference, I believe that slightly reducing oil pressure the better the performance will be. its hard to quantify, so we tested a bunch of different oil restrictor sizes and 1.5mm seems like the best solution. the downside of an oil restrictor is it can take longer for the oil to fill the bearing housing upon engine startup... that seems to be a non issue thus far. I haven't blown a bearing up yet, even with a 1.0mm restrictor (which i anticipated would hurt the turbo). 1.0mm had oil pressure around the 30-40psi range which is just too low in my opinion. I also have some customers who run turbos on quads, snowmobiles and jetskis, hovering between 15-25psi oil pressure and no turbo failures there either. food for thought!
Good afternoon. So did you change your opinion on this issue?
https://www.turbozentrum.de/Oil-Feed...estrictor-16mm



On the basis of the statistics, can it be safely established a 1.6-1.8mm restrictor? and what should be the length of the small part of the restrictor?
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Old 04-02-2018, 12:29 PM   #2408
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Quote:
Originally Posted by sergey2007 View Post
Good afternoon. So did you change your opinion on this issue?
https://www.turbozentrum.de/Oil-Feed...estrictor-16mm



On the basis of the statistics, can it be safely established a 1.6-1.8mm restrictor? and what should be the length of the small part of the restrictor?

So I've been the guinea pig for this since I've been having the smoke issue from my turbo. I've tried all the different size restrictors and the smoking has stopped once I put this on.

https://www.atpturbo.com/mm5/merchan...egory_Code=RES

it's a .09mm restrictor. (.0035") I went with the 1.65mm from ATP then I found one that was 1.5MM which was suggested by Geoff, but it was still smoking. Geoff told me if the 1.5 still didn't work to go ahead and try the .09mm.

So I can confirm that there is no more smoke coming from my exhaust.
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Old 04-02-2018, 02:31 PM   #2409
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Quote:
Originally Posted by Subi114 View Post

it's a .09mm restrictor. (.0035") I went with the 1.65mm from ATP then I found one that was 1.5MM which was suggested by Geoff, but it was still smoking. Geoff told me if the 1.5 still didn't work to go ahead and try the .09mm.

So I can confirm that there is no more smoke coming from my exhaust.
Thanks for the info. If possible, specify the length of the thin part of the restrictor.
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Old 04-02-2018, 04:36 PM   #2410
Subi114
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Originally Posted by sergey2007 View Post
Thanks for the info. If possible, specify the length of the thin part of the restrictor.
honestly I don't know but from your diagram that looks about right.
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Old 04-02-2018, 08:50 PM   #2411
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Quote:
Originally Posted by sergey2007 View Post
Thanks for the info. If possible, specify the length of the thin part of the restrictor.
You're going to want to look up orifice L/D ratio.
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Old 05-08-2018, 11:54 PM   #2412
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Just started E-tuning a friend with a 2012 STi, rotated 7163, ETS FMIC, ID1300, FlexFuel, 44mm EWG, etc... Did a few 3rd gear pulls and then told him to do a 4th gear pull and he's liking it compared to the ****ty Kinugawa 60-1 turbo he previously had.

This is just the first pull in 4th gear, so don't put too much thought in the boost curve, however, it's going to spool pretty damn well on the next map. Ethanol content is E66 and hoping for him to get the car up to E85 tomorrow for another pull on the new map. Should have the car on the dyno in a couple weeks. Boost will be about 26 PSI at our altitude on E85+ and almost 28 PSI at sea level for E85+.

The custom correction is for our 5,500+ ft altitude at 80+ degrees today.


Last edited by yamahaSHO; 05-09-2018 at 02:15 PM.
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Old 05-09-2018, 09:00 AM   #2413
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You sure that isn't the 1320video correction factor? Looks good though and comes on fast man.
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Old 05-09-2018, 09:46 AM   #2414
yamahaSHO
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Haha. I just use the correction factors I've seen on all my real dyno's here. I think the highest I had in the summer is a 1.26 and the lowest I've had was just a few week ago tuning a 1991 stock long block, supercharged SHO, which was a 1.19.




BTW, the lower graph was with those ****ty Super Trapps installed in both tail pipes. Running this back to back dyno convinced him to remove them.
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Old 05-09-2018, 12:48 PM   #2415
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Some pretty good looking numbers on that 7163. Stock engine? What's the wastegate duty cycle looking like? wondering how my 38mm gate will fair when I switch to my 7163.

Also looking pretty good on that SHO set up.
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Old 05-09-2018, 01:26 PM   #2416
yamahaSHO
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The engine a "stock" build with rods and graded drop-in pistons on a new block. Here is a graph of the WGDC as well as a graph of wastegate spring only.

Tops out at 65% on the top end (4th gear):



WG Spring only (3rd gear):


As for the SHO... I think I may have talked the owner into trying for 600whp on the stock engine.

Last edited by yamahaSHO; 05-09-2018 at 02:29 PM.
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Old 05-09-2018, 01:34 PM   #2417
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Assuming I didn't get scammed I have a 7163 coming from ebay. Going to do back to back dyno pulls comparing my 6758. All other mods equal with 1700cc injectors. Should be an interesting comparison given I have a grimmspeed tmic and no dual avcs.
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Old 05-09-2018, 02:01 PM   #2418
yamahaSHO
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I am interested in that comparison. I am happy with my 6758, but now that I live at high elevation again, I sometimes want the 7163.
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Old 05-09-2018, 02:07 PM   #2419
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Quote:
Originally Posted by yamahaSHO View Post
I am interested in that comparison. I am happy with my 6758, but now that I live at high elevation again, I sometimes want the 7163.
Its really gonna depend on how second and third gear behave between the two of them to decide which I will keep. If second and third are really sleepy with the 7163 compared to the 6758 ill probably stay with 6758. Without dual avcs but with a tmic I have no idea how the powerband will be affected. I'm hoping for something similar to the sti powerband you showed. Right now on e85 I'm hitting 400wtq at 3400 but it only stays at that or above till 5200. Thats in third on a 5mt. I'm not launching, hard shifting, or tracking and it seems to be holding fine. I've got 4.44 final drive which takes a little stress of the trannsmission.
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Old 05-09-2018, 02:28 PM   #2420
yamahaSHO
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I can say 3rd gear isn't quite as quick to get into boost. Here is a rough graph of 3rd gear for I, S, and S# on the same car I posted above:

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Old 05-09-2018, 03:09 PM   #2421
point78
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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?
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Old 05-09-2018, 03:15 PM   #2422
yamahaSHO
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I've got the same spring setup on my 6758 with the 2-port, utilizing both ports on the BW supplied 3-port. I have 7mm of preload. I am also running a .85 hot side.


Last edited by yamahaSHO; 05-09-2018 at 08:52 PM.
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Old 05-09-2018, 11:53 PM   #2423
yamahaSHO
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Well, I can't really complain about the spool/threshold on this turbo with a FMIC...

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Old 05-10-2018, 06:30 AM   #2424
point78
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Quote:
Originally Posted by yamahaSHO View Post
Well, I can't really complain about the spool/threshold on this turbo with a FMIC...

That's looking really good.

It was pretty warm out yesterday too-probably get another 3-400 rpm with some cold winter air!
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Old 05-10-2018, 09:53 AM   #2425
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Quote:
Originally Posted by Xtea View Post
Assuming I didn't get scammed I have a 7163 coming from ebay. Going to do back to back dyno pulls comparing my 6758. All other mods equal with 1700cc injectors. Should be an interesting comparison given I have a grimmspeed tmic and no dual avcs.
I actually have my .64 and .85 housing for my 6758 and then my 7163 which I'd planned to do similar testing. I started setting up my exhaust back pressure stuff yesterday. I'm finally buckling down and wrapping up all the fab stuff. Still need to fab the downpipe and finalize welds on the chargepipes.

Quote:
Originally Posted by yamahaSHO View Post
Well, I can't really complain about the spool/threshold on this turbo with a FMIC...

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.
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