Miata 1.6 + GT28RS BB ??
#1
Miata 1.6 + GT28RS BB ??
Hello.
I'm new on this forum, and my english is very bad
So, i have a 1.6 miata turbo with this setup:
-Megasquirt Pnp ECU
-430cc Supra Bi-turbo Injectors
-KnockSenseMS
-Dyn Dual Feed Rail
-AEM Wideband
-Complete XTD Racing clutch kit & light flywheel
-Wiseco Turbo pistons 8:5
-ARP Head Studs
-Forged Connecting Rods
-Mazda 323 Turbo PCV Valve
-Intercooler
Now i buy a new turbo:
TURBO GT28RS BALL BEARING
0.60 A/R
TURBINE: .86 A/R
TRIM: 60
I liked your opnion about this configuration
Best regards
I'm new on this forum, and my english is very bad
So, i have a 1.6 miata turbo with this setup:
-Megasquirt Pnp ECU
-430cc Supra Bi-turbo Injectors
-KnockSenseMS
-Dyn Dual Feed Rail
-AEM Wideband
-Complete XTD Racing clutch kit & light flywheel
-Wiseco Turbo pistons 8:5
-ARP Head Studs
-Forged Connecting Rods
-Mazda 323 Turbo PCV Valve
-Intercooler
Now i buy a new turbo:
TURBO GT28RS BALL BEARING
0.60 A/R
TURBINE: .86 A/R
TRIM: 60
I liked your opnion about this configuration
Best regards
#5
Former Vendor
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Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
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The turbo spool was pretty bad, worse than I would want to live with on the street or the track. My 2871R with the same .86 A/R turbine housing on my built 1.9 liter spools much faster. The 2860RS on the 1.6 wouldn't kick hard until after 4500rpm, and there was a serious lag in power after every shift as well. Simply too big for the motor. My 2871R with another 250cc of displacement is at full grunt by 4000rpm, and while there is a small delay between shifts, it's about half of what the 1.6/2860RS was.
#6
Hmmm, Im at 16psi by 4200 rpms with my 2871 on my 1.6. My turbine is a .64 though.
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#10
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#12
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
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That T3 might work, although I'll let Scott comment on the exact size since I'm not a T3 guru.
You want that GT25 (.60 comp a/r = GT2560R) with a .64 turbine A/R, NOT the .49 turbine A/R.
You want that GT25 (.60 comp a/r = GT2560R) with a .64 turbine A/R, NOT the .49 turbine A/R.
#17
#20
What case would that be exactly? Dave is running like 4lbs less than you in his dyno. Plus his damaged turbine isn't exactly helping his spool in that dyno.
Both of you have approx 180tq at redline, you just have more before that because you are running like 15 or more psi. There is not boost plot on your dyno, but it is safe to guess that you hit peak boost near peak tq because of the falloff afterward. IF that assumption is correct it looksl ike you hit peak boost around the same time as well. I think your dyno and Daves dynos would be VERY similar at the same boost.
Both of you have approx 180tq at redline, you just have more before that because you are running like 15 or more psi. There is not boost plot on your dyno, but it is safe to guess that you hit peak boost near peak tq because of the falloff afterward. IF that assumption is correct it looksl ike you hit peak boost around the same time as well. I think your dyno and Daves dynos would be VERY similar at the same boost.