280whp @ 12psi on '99twins, safe tune
#1
Bosozoomku
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280whp @ 12psi on '99twins, safe tune
These are the dyno results from tuning my rebuilt 13B in 2006. I have only put about 3k miles on the motor since then, and nothing else has changed. The tune is very, very conservative: Low A/Fs and retarded timing to help ensure longevity. Notice the dip at the turbo switchover! This could be smoothed out with an Efini y-pipe, but I've got other plans in store for that.
Nevertheless, water injection will be my next major move to combat knock and CCP. My next power goal is 15psi on the '99 twins and stock ports on 91 octane. What is a realistic power expectation at 15psi?
I look forward to hearing thoughts!
Click here or see attachment: http://i279.photobucket.com/albums/k...raph080206.jpg
Mods
Engine:
Hurley 3mm ceramic apex race seals
Hurley corner race seals
JDM '99 spec turbos
Tri-Point 3" downpipe
Tri-Point high flow catalytic converter
HKS exhaust
Mazda Competition radiator
ACT Performance street disc
ACT Xtreme pressure plate
XACT ProLite flywheel
Miata thermostat
Tri-Point 8mm ignition wires
K&N replacement air filter
Electronics:
AEM EMS
AEM wideband UEGO controller
Nevertheless, water injection will be my next major move to combat knock and CCP. My next power goal is 15psi on the '99 twins and stock ports on 91 octane. What is a realistic power expectation at 15psi?
I look forward to hearing thoughts!
Click here or see attachment: http://i279.photobucket.com/albums/k...raph080206.jpg
Mods
Engine:
Hurley 3mm ceramic apex race seals
Hurley corner race seals
JDM '99 spec turbos
Tri-Point 3" downpipe
Tri-Point high flow catalytic converter
HKS exhaust
Mazda Competition radiator
ACT Performance street disc
ACT Xtreme pressure plate
XACT ProLite flywheel
Miata thermostat
Tri-Point 8mm ignition wires
K&N replacement air filter
Electronics:
AEM EMS
AEM wideband UEGO controller
#4
F**K THE SYSTEM!!
I dont think a down pipe would fix that dip on your power curve...
DO you have a graph that shows boost throught the RPM?
I would guess that your loosing boost in that section..
I think some tunning will get you where you want. 15 psi and factory twins yeilds about 350whp+- on Avg.
DO you have a graph that shows boost throught the RPM?
I would guess that your loosing boost in that section..
I think some tunning will get you where you want. 15 psi and factory twins yeilds about 350whp+- on Avg.
#5
Bosozoomku
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Not a downpipe, I've got that... it's the stock '95 y-pipe that's choking off airflow during the 2nd turbo's addition. The old 10-8-10 boost pattern, mine is like 12-10-12. The '99+ y-pipe helps this problem by being more free-flowing, or so I'm told.
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#9
Bosozoomku
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That sounds much better... It was tuned on a Dynapack, way rich I might add. Any way you could send me dyno charts or fuel maps for the two cars?
#10
needs more track time
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I think you might want to do some research on troubleshooting that low boost level transition to try and decrease the amount of the drop. The autosport....com site (check for link in FAQ thread) has some good info on troubleshooting that. It looks like you drop down to 5 PSI or so at transition. I don't think the Efini Y pipe is going to help that issue.
#15
Bosozoomku
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I think there were a combination of factors... the dyno used, the near 100*F temp when tuning, and a deliberately "safe" A/F tune.
After I install a simple water injection kit and upgrade the intercooler, I would like to retune and lean out the A/F a little and bump boost to about 15lbs. This is the ultimate goal for the car.
I just replaced my COM cable for the AEM EMS, so hopefully I can post my fuel maps and datalogs soon.
Thanks to all for the input!
#19
Bosozoomku
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Data and logs
I think you might want to do some research on troubleshooting that low boost level transition to try and decrease the amount of the drop. The autosport....com site (check for link in FAQ thread) has some good info on troubleshooting that. It looks like you drop down to 5 PSI or so at transition. I don't think the Efini Y pipe is going to help that issue.
First time out logging data ...so I'm still trying learning how to extrapolate the data. Help is appreciated! I didn't set AFR units correctly, so I'll have to log some more in the correct units. However, the real time O2 date followed the O2 target table closely, but in the wrong units, so it doesn't make sense in the graphs.
The main thing I can't figure out is the fuel map. Below, it's presented in Raw, Pulse Width, and Duty Cycle units. None of the tables seem to make sense in the upper-right hand corner area. How can duty cycle approach 200%?
Here's a couple of images captured from the AEM's software.
3rd gear pull 3k-7krpms, RPM and Boost over time
http://i279.photobucket.com/albums/k...time041309.jpg
AFR target map (wideband 02)
http://i279.photobucket.com/albums/k...tMap041309.jpg
3D fuel map w/ raw data
http://i279.photobucket.com/albums/k...wraw041309.jpg
Fuel PW
http://i279.photobucket.com/albums/k...apPW041309.jpg
Fuel DC
http://i279.photobucket.com/albums/k...apDC041309.jpg
Can someone lend some insight? Thanks!
#20
dorito powered
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I see an Efini Y-pipe and a larger intercooler in your future, and possibly meth, I don't know much about the AEM system, but that may have affected it, but I doubt it.
What was your injector duty? have you rewired the pump? and a different intake all will help, I personally am using the Greddy/Trust intake and it works great and seems to be one of the better ones on the market IMO, no crappy accordian hoses FTW
What was your injector duty? have you rewired the pump? and a different intake all will help, I personally am using the Greddy/Trust intake and it works great and seems to be one of the better ones on the market IMO, no crappy accordian hoses FTW
#21
Bosozoomku
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Here's some updated graphs with AFRs with primary and secondary injector duty
New datalogs with 02 sensor feedback target and real-time. I think the real-time measurement climbs toward the target around 5800RPM due to a graph that reduces the INJ GAIN exponentially as seen in the first posted image. The second image is AFRs with both sets of injectors over a 3rd gear pull.
New datalogs with 02 sensor feedback target and real-time. I think the real-time measurement climbs toward the target around 5800RPM due to a graph that reduces the INJ GAIN exponentially as seen in the first posted image. The second image is AFRs with both sets of injectors over a 3rd gear pull.
#25
ROTARY PUNX
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In my old shop Mustang Dyno Cell showed the Stock 2009 R35 at
406whp at 6400RPM
414 torque at 3800
Same Car Same Day Dyna Pack
452whp at 6350
448 torque 3865
All Dynos Vary..typically Dyno Jets Read The Highest followed by Dyna Packs...and the rest of the real world uses Mustang Dynos. (and tune with the hoods down )