AZRR CYM Build Dyno Results

joff · 07-10-2009, 01:37 AM

Awesome numbers!

Curious to what timing advance/split you ended up at?

If you're using standard fuel pressure 43psi, your injectors are probably somewhere around 66%-69% duty cycle -- does that sound about right?

For fun, I just charted your 16psi dyno/boost graphs and marked up your dyno pull's progression through the GT35 compressor map. 440 whp is about 57 lb/min on a rotary, which at 16psi (2.1 pressure ratio) is right at the edge of the map. The turbo's most efficient point (79% efficient) is right around 270whp or 4500rpm and has dropped to 65% efficient at 7000RPM/440whp. Your turbo looks to be spinning at exactly 100,000 RPM at max power and 85,000 RPM at 3800RPM at full boost.

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07-10-2009, 01:37 AM	#5
joff Rotary Fanatic Join Date: Dec 2008 Location: Mesa, Arizona Posts: 114 Rep Power: 17	Awesome numbers! Curious to what timing advance/split you ended up at? If you're using standard fuel pressure 43psi, your injectors are probably somewhere around 66%-69% duty cycle -- does that sound about right? For fun, I just charted your 16psi dyno/boost graphs and marked up your dyno pull's progression through the GT35 compressor map. 440 whp is about 57 lb/min on a rotary, which at 16psi (2.1 pressure ratio) is right at the edge of the map. The turbo's most efficient point (79% efficient) is right around 270whp or 4500rpm and has dropped to 65% efficient at 7000RPM/440whp. Your turbo looks to be spinning at exactly 100,000 RPM at max power and 85,000 RPM at 3800RPM at full boost.