EFR 7163 T25 AR .85
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
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)
Reply
3
3
Junior Member
Joined: Sep 2020
Posts: 351
Total Cats: 76
From: Rochester, Ny
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
Reply
0
0
Thread Starter
Newb
Joined: Sep 2018
Posts: 29
Total Cats: 2
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.
Reply
0
0
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
with 1.65bar boost it made 457whp/530nm. At that point wastegate boost solenoid duty was 100% with the stock (soft spring) wastegate actuator
Reply
1
1
Thread Starter
Newb
Joined: Sep 2018
Posts: 29
Total Cats: 2
Reply
0
0
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
Reply
0
0
Senior Member
Joined: Mar 2017
Posts: 804
Total Cats: 116
From: GER
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
Reply
0
0
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
Reply
1
1
Junior Member
Joined: Sep 2020
Posts: 351
Total Cats: 76
From: Rochester, Ny
Reply
0
0
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
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?
Reply
0
0
Thread Starter
Newb
Joined: Sep 2018
Posts: 29
Total Cats: 2
What head gasket are you using?
I am using OEM one and ARP Bolts hoping not to lift the head.
Reply
0
0
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
Stock head gasket with ARP bolts. There is a possibility I already lift the head during my last dyno pull as coolant temps suddenly jump. I have to re-torque the nuts next....
Reply
0
0
Junior Member
Joined: Jun 2008
Posts: 414
Total Cats: 69
From: Finland
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....
Reply
0
0
