vmrevo9

iTrader: (33)

man i have a lot to learn

elhalisf

iTrader: (171)

From the research i have done, tuners say to road tune in 4th gear and dyno tune in 3rd. one thing you have to consider is that a 4th gear pull will give you about 0.5 afr richer than a 3rd gear pull. i have confirmed that in a couple of cars i have tuned.
however, i tune for 11.8-12.0 afr in 3rd gear on 93 octane gas. you should tune it slightly richer than that with 91 octane. also, your timing is very conservative and is the reason why your not seeing any knock.

jmoudry

iTrader: (15)

I think I may be able to eek a couple of degrees here and there but my previous professional dyno tune was about 5 degrees higher in the 5k and up range and knocked like crazy. This tune is about the best I can get and keep the knock counts under 5. I think it is because I am running 22psi (even though that was the boost I paid to be tuned at). From my experience there is no substitute for road tuning.

jmoudry

iTrader: (15)

This is the timing map that I am running now. I am not using the ECU+ to modify any of the ECU inputs. I am getting 4 counts of knock (1.4-1.6V) about 5k tapering off to 1 count at 6.5k. AFR holds around 11.25 as seen in previous graphs. I really don't have much room for timing increases. I still think the fact that I am running 22 to 22.5 psi and 91 octane is killing me. I am between 220 and 240 load to about 5k and then move into the 180 to 200 range after that. Do these numbers seem to low? Thanks for the input guys

jmoudry

iTrader: (15)

Heres the 3rd gear log afr 11.3 and the above map:

jimib

Speeking of which how close are people getting there AFRs inbetween all gears? When tuning using safc in addition to a mail in dyno flash I was able to pretty much hold a steady 11.3 all the way thru 3rd. Maybe .3 or so different in 4th. I now am comepletly off the SAFC and in first and second ranging 10.8-11.2 and 3rd and 4th 10.3 ish. I want to beable to atleast keep it steady all the way thru one gear, but should I not beat my head up against the wall worring about the AFRs changing .4~ on upshifts?

jimib

Update

I now have it about 11.5 thru 2nd and holding pretty close around 11.2 & 11.3 in 3rd and 4th.

I was trying to keep smooth transitions on my map, but to get the afrs close it looks like a lot of random values on the map

cij911

iTrader: (14)

This may be considered off topic -- sorry if it is....

How do folks optimize boost, AFRs, and timing as it pertains to power? Do you first settle on boost, then AFRs, and then timing? Is there a formula used to optimize the mix?

Also, with the 9's -- I have heard that folks are running more like 25/26 psi (peak) boost on 93 octane. Are any of you running that high on straight 93? I am currently like 22/23 in 3rd and 24 in 4 - 6....

Ralph

iTrader: (19)

I run about 24~psi right now on cali 91 octane. 11.5-11.8 AFR. 0-1 counts of knock and, according to the DataLogLab logs, I'm at about 315-320hp/305-310wtq.

nj1266

iTrader: (6)

Are you logging your boost or are you relying on a gauge? If it is a gauge then that 24 is around 22.5 psi or less depending on the gauge you are using.

Ralph

iTrader: (19)

Yes its a crappy autometer.. so maybe its less. Load according to EvoScan is between 280-300 during the initial spike. Depends on what RPM I start at.

TTP Engineering

iTrader: (465)

This would be the max on 93 I would run, lower for 91.

nj1266

iTrader: (6)

I used to have a Defi D gauge and it would show 23-24 spike @ peak back when I ran 91 octane gas. That scared me and made me back the boost down. Then I got a MAP senssor and started logging my boost and the logs showed 22 psi. I sold the Defi D and got an Innovate XD-16. This unit shows me the exact boost being logged among many other features that are really helpful in daily driving.

I would say that your autometer is about 1.5-2 psi off. So your 24 psi is around 22 psi.

Ralph

iTrader: (19)

. Oh well, its pretty fast anyway for 22 psi .

cij911

iTrader: (14)

I think if you are hitting a 300 load, then you are likely closer to 24 psi than 22 (IMHO)....