EFR 7163 T25 AR .85
01-07-2021, 12:59 PM
#22
Junior Member
Join Date: Jun 2008
Location: Finland
Posts: 413
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I just ordered EFR7163 to replace my GT2871r (390whp). Hoping to get at least 450whp
I'm going to do 3 dyno test:
1) EFR7163 T25 dyno with stock VVT cams
2) Add aftermarket VVT cams (custom made cams)
3) Switch T25 housing to T4 twinscroll (have to make new manifold)
I'm going to do 3 dyno test:
1) EFR7163 T25 dyno with stock VVT cams
2) Add aftermarket VVT cams (custom made cams)
3) Switch T25 housing to T4 twinscroll (have to make new manifold)
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01-07-2021, 08:26 PM
#23
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Join Date: Sep 2020
Location: Rochester, Ny
Posts: 345
Total Cats: 76
awesome, interested in results! Friend of mine bought a 7163 for his Miata, but it is k24 swapped... should be a great match for that engine. Will be interesting to compare your dyno stuff with his
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02-10-2021, 04:07 AM
#24
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Join Date: Sep 2018
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He's been refining that car for a few weeks Speed Test and will probably be able to give some first hand impressions and logs here soon.
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04-06-2021, 09:28 AM
#30
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Join Date: Mar 2017
Location: GER
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Hey Muoto,
I followed your old build thread, was a good one.
Do you have the dyno sheet or some speedo videos of this killer setup? I can't imagine how 460whp feels like. What tire size are your running to keep traction in fourth gear
I followed your old build thread, was a good one.
Do you have the dyno sheet or some speedo videos of this killer setup? I can't imagine how 460whp feels like. What tire size are your running to keep traction in fourth gear
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04-06-2021, 12:01 PM
#31
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Join Date: Jun 2008
Location: Finland
Posts: 413
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04-06-2021, 02:14 PM
#33
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Join Date: Jun 2008
Location: Finland
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Torque is falling like it did with the GT2871r even when boost isnt' so much with help of .85 housing. I'm guessing stock VVT cams are restricting there,...or head ports(lack of flow)..or both 
what do you guys think?
what do you guys think?
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06-23-2021, 05:20 AM
#40
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Join Date: Jun 2008
Location: Finland
Posts: 413
Total Cats: 69
damn...I had catastrofic engine failure and part of my broken valves went through EFR, so that's gone 
Should I try G25-660 next? I'm really instrested about the spool time with the 0.49 AR housing. Almost 60 lbs/min flow with so small AR, what sorcery is this....
Should I try G25-660 next? I'm really instrested about the spool time with the 0.49 AR housing. Almost 60 lbs/min flow with so small AR, what sorcery is this....
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