AZRR CYM Build Dyno Results

albertomg · 07-09-2009, 08:34 PM

Damn. That is pretty nice. Congrats on a nice build. I recently saw CrispyRX7's dyno on his 35 with a well built motor turn similar numbers at similar boost.

Interesting choice on the fuel system. Can you provide more info on you decision to go that way?

Happy boosting

RCCAZ 1 · 07-09-2009, 09:03 PM

Quote:

Originally Posted by albertomg

Damn. That is pretty nice. Congrats on a nice build. I recently saw CrispyRX7's dyno on his 35 with a well built motor turn similar numbers at similar boost.

Interesting choice on the fuel system. Can you provide more info on you decision to go that way?

Happy boosting

Thanks Albertomg.... my reasoning for going with the newest model RX-8 injectors was that Paul Yaw of Yawpower here in Phoenix has done extensive flow testing of various injectors on the market. He believes that these injectors provide some of the best atomization results of any that he's tested. My choice on secondaries was the result of choosing to go with the Ground X LIM. I think the idea of equal length runners will make a difference on better balancing my engine temps from front to rear housings, however I have yet to take any data to substantiate this. Again, Paul's 1000 cc secondaries provide superior atomization, so in theory I should be able to run 4 secondary injectors with my Power FC at lower duty cycles, and without the need for aftermarket resistors. Not sure what duty cycle Tony hit while making the 439 RWHP pull, however I'm confident that I have more than enough fuel to support another 100 HP. I'll check with him on those duty cycle numbers tomorrow and report back.

Tony at UMS has tuned 100s if not 1000s of cars, and he was truly impressed with the injector performance. His comment to Glen was "Man, I've got to have a set of those." I think that speaks volumes.

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.

07-09-2009, 08:34 PM	#1
albertomg Rotary Fan in Training Join Date: Feb 2008 Location: Bay Area CA Posts: 91 Rep Power: 18	Damn. That is pretty nice. Congrats on a nice build. I recently saw CrispyRX7's dyno on his 35 with a well built motor turn similar numbers at similar boost. Interesting choice on the fuel system. Can you provide more info on you decision to go that way? Happy boosting __________________ 93 Vintage Red R1 Power: Street Ported Motor, 99 Twins, V-mount, DP>SMB cat/MP> RB cat back, PFC, 1300cc secondaries, Fuel Pump, ACT clutch, RB lwfw, etc Steve Kan tuned - 310rwhp at 10PSI Suspension: Tripoint custom valved Koni + Ground Control coilovers, Eibach sway bars, SuperPro bushings, Corner Balanced and accurately aligned Brakes: RacingBrake 4 corner BBK SSR Integrale 17"x9" +45, Dunlop Star Specs 255/40

07-10-2009, 01:37 AM	#3
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.