Turbo Comparison Table – MS3/MS6

BAT-man

BAT-man

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There is not official turbo spec sticky, and so I figured I’d start one, and will add any turbo which the folks can provide ALL (or at least not missing comp/turbine inducer/exducer specs) of the listed parameters, as it will greatly reduce the time to understand and compare them all. Please feel free to correct any mis-information you may see, as I may have mistyped/mis-calculated some aspects, but please mention how you got to your different numbers before we update the table(s). Question marks after/instead of any specs mean I think this is the correct figure, but I don’t have adequate support to be 100% sure, or don’t have the spec at all.


Note 1: This is a stock flange turbo spec table. I can add a non-stock flange table of the commonly used turbos – let me know.


Note 2: As of this date (2020/12/03), there is a new BNR S3 v4 turbo which is a 2867 or similar, for which the full specs have not been released. The S6 flowrate information we have from vendors and FB, esp. seems fishy as well.


If there is an easy way to paste the excel table into BB code so it looks like the spreadsheet, let me know. Pasting and updating pictures of the table for now.
2020/12/29:
Turbo Comp - 2020 12 29.jpg
 

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BNR specs need updating
BNR S3v4: GT28 Turbine wheel, 2867 Gen 2 point milled compressor wheel (46 lbs/min flow rate), BNR .63 a/r turbine housing with 27mm wastegate port, 2.36” inlet, journal bearing
BNRS4v2: 3.5” inlet, 2.25” outlet T30 Turbine wheel, 54mm/76mm point milled billet compressor wheel (53 lbs/min flow rate), journal bearings, 3076, BNR .72 a/r turbine housing with 27mm wastegate port.

S5 should probably make it on the list as people are using that too, all specs: https://bnrsupercars.wordpress.com/mazdaspeed-3-6-cx-7/
 
S5 I already have, see above, and S3 v4 I updated as much as I could but we don't have the compressor specs. Are they the same as the Mamba 2867?
So far BNR specs have been almost identical to Mamba's, which makes me wonder if he has been rebranding/selling their turbos - they had their 2867 before he did, btw, and they post comp/exhaust A/Rs, unlike BNR. The turbine presumably stayed the same GT28.

Note: Take a look at CST4 and the new BNRs3 v4. They are almost identical now, if the BNR compressor is 50/67 and CST4 is 51/68, with CST4 having a slightly bigger compressor and a bigger exhaust wheel (a good thing I think). It's very odd that the BNR 2867 flowrate of 46lb stayed the same as the larger 54/71 compressor wheel v3's. If the only change was a smaller compressor wheel in v4, the flow rate should have gone down, or the v3 flow rate was higher.
 
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The BNR S6 has a 60mm/76mm billet compressor wheel and a 68mm/62.3mm turbine wheel and flows 78lb/min. Journal Bearing. It flows like a gtx3582r gen 1 but it’s the size of a 3576. Both the BNR S5 and S6 are good for around 35psi until they start getting out there efficiency. The BNR S4 is a .70/.72 a/r while the S5/S6 are a .70/.82 a/r
 
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