RB Tuning - software,fuel used, and target a/f's.

[evilgtr]

With such a vast variety of tuning software. Professional tuners, and self taught tuners I thought we could put together a thread of what software you are using, the octane of fuel with or with out additives and the air fuel range you have had your car tuned at with either dynoed whp or estimated hp output. This will not be another thread specifically for dyno numbers but more so to find the optimum tuning range in which RB's operate.

Recently there has been alot of discussion on where individuals target there a/f's along with how much boost and timing. If you have any first hand info on Japanese tuning or your personal tuning please feel free to share what's worked for you and what hasn't

All input is welcome
Thanks
Jeff

[evilgtr]

Il start off
Engine RB26 stock displacement
Running 16psi got me 520whp/480lb.ft with wot a/f ratio of approx 10.9
Which I have now been told is to rich and could be potentially costing me hp.
I'm running the Vipec v44 on Mohawk 94.

[sullivanracing06]

rb26
aem ems
aem 3.5 bar map
14.7 psi 571whp
precision 1000s
93 oct

[evilgtr]

Wow that's huge power for low boost, what's your turbo setup ?
Do you know you a/f at wide open throttle ?

[NismoS-tune]

16 PSI on T04Z SPL turbo or -10s or whaaaa?

Il start off
Engine RB26 stock displacement
Running 16psi got me 520whp/480lb.ft with wot a/f ratio of approx 10.9
Which I have now been told is to rich and could be potentially costing me hp.
I'm running the Vipec v44 on Mohawk 94.

And sullivan, is that on pump gas with a giant turbo? That's 1 bar pretty much lol must be a stoic tune?

rb26
aem ems
aem 3.5 bar map
14.7 psi 571whp
precision 1000s
93 oct

[NismoS-tune]

Oh, it's too rich depending who you talked to. Your tuner made it that way, like all cars that come through there. In japan they tune super sharp with nice AFRs but in Canada, it's different I guess. Have you talked to other tuners or other guys with opinions about your AFRs? What did Jurie Human think? Ever talked to him about it?

Il start off
Engine RB26 stock displacement
Running 16psi got me 520whp/480lb.ft with wot a/f ratio of approx 10.9
Which I have now been told is to rich and could be potentially costing me hp.
I'm running the Vipec v44 on Mohawk 94.

[evilgtr]

Nismo-stune - Bim trying to find out what my air fuel should be that's why I started this thread, I think it is to rich to. Where do you think it should be ?

I sent Jurie a few texts but havnt heard back yet

[NismoS-tune]

I made 302whp on a very healthy but stock engine with 1bar, same PSI as the guy with 571whp lol. Same tuner as you. Most likely same AFR. I expect to nearly double that next time

[Blackzenki82]

R32 GTR
stock R34 RB26DET
AEM EMS
GM 3 bar map sensor
T61 twin scroll
XS Power mani
TiAL 38mm WG
Trust 4" FMIC w/3" HKS piping
93 octane

car made 400whp/347wtq @ 12.5 PSI


your target AFR's should be:

15/16/17 at idle
14.7 cruising
12.0/11.5 @ full boost/WOT

running that rich under load/boost, you're loosing HP.






i can vouch for sullivanracing06's power BTW... he is making that, pretty sick set up... and yes, on pump gas...

[evilgtr]

Blackzenki82 thanks for the insight, the consensus is my a/f's are to high so when I re-tune in the spring with my new mods I will be targeting a higher a/f. I still dont understand why it's so rich, does this reduce the chance of detonation ? Provide a safety cushion ? I know we did pull some timing out from the original tune of 540 or 550whp so it would be a little safer. It's still fast as **** so I'm notcomplaining I just want to make sure everything is dialed in properly and running the was it was designed to