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Sydoforumsuperfan :)
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Its dearer in general because you get more like mixed flow turbine wheel and a full aluminium CHRA you know that bit that is usually cast steel that holds the bearings.
This any help or only for Petrol engines ?
http://www.turbos.bwauto.com/aftermarket/matchbot/index.html#version=1.3&displacement=4.2&CID=256.28400000000005&altitude=500&baro=14.502&aat=75&turboconfig=1&compressor=67x80&pt1_rpm=2000&pt1_ve=85&pt1_boost=5&pt1_ie=99&pt1_filres=0.08&pt1_ipd=0.2&pt1_mbp=0.5&pt1_ce=66&pt1_te=75&pt1_egt=1550&pt1_ter=1.18&pt1_pw=1.89&pt1_bsfc=0.43&pt1_afr=11.5&pt1_wts=300&pt1_wd=83&pt1_wd2=74&pt1_wrsin=69033&pt2_rpm=3000&pt2_ve=95&pt2_boost=10&pt2_ie=95&pt2_filres=0.1&pt2_ipd=0.2&pt2_mbp=1&pt2_ce=70&pt2_te=73&pt2_egt=1600&pt2_ter=1.36&pt2_pw=9.18&pt2_bsfc=0.45&pt2_afr=11.5&pt2_wts=320&pt2_wd=83&pt2_wd2=74&pt2_wrsin=73635&pt3_rpm=4000&pt3_ve=100&pt3_boost=15&pt3_ie=95&pt3_filres=0.12&pt3_ipd=0.3&pt3_mbp=1.3&pt3_ce=74&pt3_te=72&pt3_egt=1650&pt3_ter=1.61&pt3_pw=22.16&pt3_bsfc=0.48&pt3_afr=11.5&pt3_wts=340&pt3_wd=83&pt3_wd2=74&pt3_wrsin=78238&pt4_rpm=5000&pt4_ve=100&pt4_boost=17&pt4_ie=92&pt4_filres=0.15&pt4_ipd=0.4&pt4_mbp=1.5&pt4_ce=76&pt4_te=71&pt4_egt=1650&pt4_ter=1.81&pt4_pw=30.66&pt4_bsfc=0.5&pt4_afr=11.5&pt4_wts=368&pt4_wd=83&pt4_wd2=74&pt4_wrsin=84681&pt5_rpm=6000&pt5_ve=105&pt5_boost=17&pt5_ie=90&pt5_filres=0.18&pt5_ipd=0.5&pt5_mbp=1.8&pt5_ce=72&pt5_te=70&pt5_egt=1650&pt5_ter=1.98&pt5_pw=34.33&pt5_bsfc=0.52&pt5_afr=11.5&pt5_wts=400&pt5_wd=83&pt5_wd2=74&pt5_wrsin=92044&pt6_rpm=7000&pt6_ve=105&pt6_boost=17&pt6_ie=90&pt6_filres=0.2&pt6_ipd=0.6&pt6_mbp=2&pt6_ce=66&pt6_te=70&pt6_egt=1650&pt6_ter=2.18&pt6_pw=36.06&pt6_bsfc=0.55&pt6_afr=11.5&pt6_wts=400&pt6_wd=83&pt6_wd2=74&pt6_wrsin=92044&
 

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Its dearer in general because you get more like mixed flow turbine wheel and a full aluminium CHRA you know that bit that is usually cast steel that holds the bearings.
I'm happy to pay what ever to be honest. Money isn't an object and it's about the fun getting there, just don't want to make the same mistake(term used lightly) and go the same option like I did with the 16l.

Someone could show me an alternator and say it's a turbo and I wouldn't see the difference.. Lol
I'm not that bad but you get the idea. :)
 

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Mixed flow turbines are a bit more efficient.
It is said that they can produce equivalent Spool rates as conventional type turbines, with very low drive pressures. I have seen figures of 1:2 published in white papers.
I would always look what was going in and out of turbo department. Mainly larger stuff, but alot if the modern engines in trucks, earthmoving etc, are now mixed flow.
The entry angles varied a bit, as did turbine design itself, but all the same principle. Feeding the turbine from a angle, not directly radially.
Garrett also have a version they were doing in TA45 size, but I did see mentioned in the master dealer update sometime ago that a t3 version was in development.
Is it going to work for us, well I would think so, and would certainly try it myself. It is another project I have put on the back burner for the time being.
Just a personal thing for me, but I prefer a non water cooled chra, and a floating bush bearing for ease of rebuild. I haven't looked into the service life of the BW bearing setup, but Garrett BB chra are 100K km, suggested service life from memory. As I said, that is just a personal thing though.
 

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Ah cool, so the bw has a water cooled chra and (assuming) stainless bb set up.
100k for me is about 4-5 years, so wouldn't be to bad if rebuild time was that long apart.
Would the water cooler chra assist in efficiency by keeping it cooler?
What would be the reason do you think that the inlet mouth is only 2.5 and not 3" like most other turbs.



I'm happy to be part of the test crew.
 

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Sydoforumsuperfan :)
nissan gu patrol
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Ah cool, so the bw has a water cooled chra and (assuming) stainless bb set up.
100k for me is about 4-5 years, so wouldn't be to bad if rebuild time was that long apart.
Would the water cooler chra assist in efficiency by keeping it cooler?
What would be the reason do you think that the inlet mouth is only 2.5 and not 3" like most other turbs.



I'm happy to be part of the test crew.
The bigger ones have 3" inlet. All dump outlets are 3.5"
 

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The bigger ones have 3" inlet. All dump outlets are 3.5"
You would be better off just copying and pasting instead of guessing what you read.

The b1 frame turbos (6758, 7163, 6258 etc) will mostly be a 2.5" compressor inlet. All will be a 3" turbine outlet.

The b2 frame turbos, in particular the 7064 as its closest for our application has a 3.5" compressor inlet. And a 3" turbine outlet.
 

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Ah cool, so the bw has a water cooled chra and (assuming) stainless bb set up.
100k for me is about 4-5 years, so wouldn't be to bad if rebuild time was that long apart.
Would the water cooler chra assist in efficiency by keeping it cooler?
What would be the reason do you think that the inlet mouth is only 2.5 and not 3" like most other turbs.



I'm happy to be part of the test crew.

They dont need to be bigger as they dont need to accomodate silly anti surge drillings or slots. Instead they have a well placed valve that helps to prevent surge.

Get a 7163 with t25 0.85ar turbine housing. And a 12mm pump.
 

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Can someone generalise what the bw turbos are roughly equivalent to. I.e 16 g 18g 20g as these seem to be the benchmark.
The 6758 with t25 0.64 ar turbine housing is a neat little unit. It can nearly cover all 3 of these turbos you mention. It loses out in the top end part to the new 18 and 20g ufi offerings but makes up for this with its insane response with awesome lbs/min pumped not just psi.
 

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Not certain as to why, but as Oldmav has indicated, I don't think the 7064 worked out very well.
I believe the 7064 you are referring to is actually on my patrol. The turbo at this point is not the problem from prior testing with the 11mm pump. It now has a 12mm but I opted to keep the electronics and try a different path of control that will work out much cheaper and hopefully more easily user adjusted than the likes of say a unichip.

One thing we tried with this turbo is removing the air cleaner and even one time the pipework from the compressor inlet. Surprisingly this didnt make any difference like what others have seen with different setups.

The 7064 still managed to do 183rwkw and 600nm. Stock standard td42ti with only the turbo and 12mm tcv pump. Everything else is stock with 350k on it.
 

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Sydoforumsuperfan :)
nissan gu patrol
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8,872 Posts
You would be better off just copying and pasting instead of guessing what you read.

The b1 frame turbos (6758, 7163, 6258 etc) will mostly be a 2.5" compressor inlet. All will be a 3" turbine outlet.

The b2 frame turbos, in particular the 7064 as its closest for our application has a 3.5" compressor inlet. And a 3" turbine outlet.
What's the 92mm mean ?
Turbine outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos
 

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Can someone generalise what the bw turbos are roughly equivalent to. I.e 16 g 18g 20g as these seem to be the benchmark.
The 6758 with t25 0.64 ar turbine housing is a neat little unit. It can nearly cover all 3 of these turbos you mention. It loses out in the top end part to the new 18 and 20g ufi offerings but makes up for this with its insane response with awesome lbs/min pumped not just psi.

So what's the difference between a " single scroll and hp duel ball bearing" apart from $300 ?

Also what adapter flange did you use as I see they are some really cheap ones the there ones like Dts sell for $200?
 

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Nothing silly about surge slots or porting at all. They serve a purpose and work well, and depending on when,where ,and how they are done, can serve several purposes.
 

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Nothing silly about surge slots or porting at all. They serve a purpose and work well, and depending on when,where ,and how they are done, can serve several purposes.
Fair call. I may have been a little over zealous with my comment.

What are your thoughts on say the placement of the slots in a garrett? And in your experience have you seen any advantages/disadvantages of say drillings over slots or vice versa?

Do you still run a bov yourself? And have you played with its placement much?
 

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So what's the difference between a " single scroll and hp duel ball bearing" apart from $300 ?

Also what adapter flange did you use as I see they are some really cheap ones the there ones like Dts sell for $200?
I dont quite follow. The single scroll is just describing the turbine inlet. Most avaialable for a td42 are single scroll. Twin scroll or divided housings have 2 entry points to the turbine as such. What is $300 different?

I have used the ones supplied by mtq and gcg. I dont pay what you were quoted however.
 

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I just had a quick look at eBay USA and there appeared to be two different ones unless they just described differently and was $300 diff in price
 
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