Billet 6062 Dyno Results
#1
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Billet 6062 Dyno Results
The goal was to spec out a turbo to run in NASA TTS class at low boost. Even with the small billet and conservative tuning, I overshot my 330-340 rwhp target.
Relevant specs:
- Fresh rebuild, street ported by David Jerome
- Journal bearing PT6062, undivided
- 3" exhaust routed WG, resonated MP, RB cat back
- M2 medium SMIC, HKS Twin Power
362 hp / 304 tq on wastegate alone. It was supposed to be a .7 bar spring, but for some reason the boost jumped to 14.9 psi and tapered down to around 11.5 psi at peak hp.
429 hp / 349 tq, again the boost peaked at 18.6 psi and dropped to around 16.5 psi at peak hp.
400 hp was achieved at approximately 14.5 psi.
Not sure why the boost is dropping off at higher RPM, but it may be a happy accident since it fattens up the torque a bit in a horsepower limited class. Regardless, the WG will need a lighter spring to get under 340 hp because neither the car nor the driver is prepped to play with the big boys in TTU.
I'm not sure if PTE still makes the 6062, but it's a nice responsive little turbo for road course duty.
Relevant specs:
- Fresh rebuild, street ported by David Jerome
- Journal bearing PT6062, undivided
- 3" exhaust routed WG, resonated MP, RB cat back
- M2 medium SMIC, HKS Twin Power
362 hp / 304 tq on wastegate alone. It was supposed to be a .7 bar spring, but for some reason the boost jumped to 14.9 psi and tapered down to around 11.5 psi at peak hp.
429 hp / 349 tq, again the boost peaked at 18.6 psi and dropped to around 16.5 psi at peak hp.
400 hp was achieved at approximately 14.5 psi.
Not sure why the boost is dropping off at higher RPM, but it may be a happy accident since it fattens up the torque a bit in a horsepower limited class. Regardless, the WG will need a lighter spring to get under 340 hp because neither the car nor the driver is prepped to play with the big boys in TTU.
I'm not sure if PTE still makes the 6062, but it's a nice responsive little turbo for road course duty.
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Thanks for the kind words guys. I'm pretty sure there are no boost leaks.
It's a T4 .81 A/R hotside. The 62 turbine wheel is bigger than a GT35R. I didn't expect it to choke, but that may be a bad assumption?
It's a T4 .81 A/R hotside. The 62 turbine wheel is bigger than a GT35R. I didn't expect it to choke, but that may be a bad assumption?
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