Dyno Results

[EscortNation]

From 2750-4000 the a/f goes from 14-14.8. 4000rpm droping back to 14 a/f peaking at 3200rpm. This is even to lean for a na car yet alone forced induction. From 5000rpm its at 14 then by 6500 is at a 12. I have the walbro 255lph pump, and gtx injectors. The only thing i need to do is get the safc to work with the throttle full open

[elscotto80]

Look at my air/fuels, the GTX ECU does very good with them. i tuned the vaf for safety also.

[EscortNation]

Look at my air/fuels, the GTX ECU does very good with them. i tuned the vaf for safety also.

Just to let you know the vaf doesnt do a thing under full throttle. It uses the maps that are programed into the ecu. I know the GTX ECU is better. my friend and i went to the dyno together. He has the GTX ECU and it still lean. not near as lean but still is. The ecu still has the same curve but just lower in the a/f graph.

[elscotto80]

Um, I disagree, when i fiddled with it, i would gain/loose power and my air/fuels would change also. My car was tested at full throttle.

[EscortNation]

my friend with the gtx ecu is running 13 psi and thats when it goes lean. from about 4000 rpm to 5000 rpm cuz thats when he is hitting 13 psi, it seems to run a safer A/F ratio when its boosting up to about 10 psi and safer when boost starts to drop off back to 10 at about 6000rpm but when it hits full boost at 13psi around 4000 to 5000 rpm is when its lean. we then tried adjusting his vaf and made no significant difference at all.

[Lex]

was it an EGT or RX-7 VAF?

[elscotto80]

I run and RX-7 VAF.

[scortadict]

Has anyone dynoed a complete GTX ? What results do you get?

i dyno my gtx engine i'm all stock with stock fuel pump with a probe intercooler with stock tinny inlet outlet. here my graph

[popsicle]

i believe the 4wire tps works best with the safc. look into it.

[D323]

Just to let you know the vaf doesnt do a thing under full throttle. It uses the maps that are programed into the ecu. I know the GTX ECU is better. my friend and i went to the dyno together. He has the GTX ECU and it still lean. not near as lean but still is. The ecu still has the same curve but just lower in the a/f graph.

http://www.wihandyman.com/forum/showthread.php?t=7664&highlight=myth

read post #8 for specifics.

[MazdaTGTS]

Try a BP-01 ECU with a RX-7 VAF and a walbro fuel pump. It works great for me. 11.0 AFR all the RPM band. 192 whp 211 torque at 15 psi of boost.

[Lex]

Try a BP-01 ECU with a RX-7 VAF and a walbro fuel pump. It works great for me. 11.0 AFR all the RPM band. 192 whp 211 torque at 15 psi of boost.

Isnt that bad boy too rich at part throttle?

[D323]

Isnt that bad boy too rich at part throttle?

I was gonna ask that too, especially since 192 whp seems a bit low for 15psi of boost.

[MazdaTGTS]

I was gonna ask that too, especially since 192 whp seems a bit low for 15psi of boost.

Well for me is good for a 13.5@102 mph on street tires. I will try to post the dyno graph later. I think that I reach the limit of the VJ-20 but definitely my short is the ECU. But because my AFR is 11.2 11.3 at WOT the engine is running safe and I am having a good time with the car.

Remember I don't have a FMIC I am using the stock GTX IC and BOV which is inside the engine bay.

[Lex]

Try a BP-01 ECU with a RX-7 VAF and a walbro fuel pump. It works great for me. 11.0 AFR all the RPM band. 192 whp 211 torque at 15 psi of boost.

What does your boost drop to at redline?