My buddy came over last night and did logging for me.
My mods are hks downpipe, Catback, K&N drop-in filter, intercooler pipes, and MBC @21
I was running about 94 octane. 4gallons of 100octane and 7gallons of 91octane
All my SAFC settings at 0

and here's the result:

RPM Timing TPS 02 1bank

2600 19 98 .88

2700 18 100 .88

2830 16 100 .86

3004 15 100 .9

3164 11 100 .92

3371 8 100 .92

3586 7 100 .94

3848 2 100 .96

4086 3 100 .96

4344 4 100 .96

5172 6 100 .96

5398 6 100 .96

5672 6 100 .96

5906 8 100 .96

6180 10 100 .96

6422 12 100 .96

6621 14 100 .96

6701 16 100 .96

6801 17 100 .96


I shut it off at 6800rpm because of the curve... scary...
(This was done at the closed track of course! )

I'm thinkg about to take some fuel out after 3800rpm
What do you guys think?

 

Well, yeah. You are rich once boost kicks in, because that's how we come from the factory. You need to go all the way to 7500, though, to get a full understanding of your timing curve. Work towards a .92-.94 O2v all the way up while trying to get the timing curve to steadily increase to 19-20* by 7k rpm. If your timing gets out of whack by going flat or by dropping at any point in the log (above 4k only), then add fuel back in at that rpm.

Btw, if you have the stock cat, then you don't have a TBE, so keep that in mind when listing mods in the future. What you have is a downpipe and cat-back.

 

Wartallon,

I just got a pocketlogger, is there any thing need to ensure that you are getting accurate timing numbers. Also to you have a wide band o2, and if no why not?

NefBlk

 

Got that TBE list fixed!
Thanks for the help!

 

You do want to get a wideband O2 in order to get accurate AFRs. I don't have one for 2 reasons: they cost no less than $300, and I don't want to weld a bung in my downpipe. It is possible to just place the wideband O2 in place of the rear O2 temporarily just for tuning, and then take it back out after tuning, but that keeps you from being able to see your AFRs on a constant basis, which is nice so that you can see how changes in atmospherics and octane affect your tune. I will get a wideband O2 once I'm settled into my new house in Colorado and have had a chance to get the finances in order. Until then, I just do fine with my narrowband readings...

 

I want to be a little conservative since I don't have wideband reader. (probably .94 all the way)
I'm gonna take some fuel out after about 3800rpm and will see.

 

That is a good idea and sure work just fine...

 

just be careful, when engine gets really hot, your o2 reading will be more lower. that means your 96 could actually means 94. stock 02 sensor is hard to trust.
Watch the below

today's my first run the same setting:
5477.00: 3.00, 0.94, 100.20,
5699.00: 4.00, 0.96, 100.20,
5930.00: 7.00, 0.96, 100.20,
6117.00: 8.00, 0.94, 100.20,
6324.00: 12.00, 0.96, 100.20,

second run with the same setting:
5336.00: 5.00, 0.94, 100.20,
5563.00: 5.00, 0.94, 100.20,
5746.00: 8.00, 0.94, 100.20,
5977.00: 9.00, 0.94, 100.20,
6172.00: 11.00, 0.94, 100.20,
6371.00: 13.00, 0.94, 100.20,

second run was just right after the first run. so engine was much hotter. of course I ran the first when it was fully warmed up(driven for 30 mins) but look at the result.

 

Wow that meant seomthing... but isn't .94 also kinda safe side?
I guess I have to be more careful when taking fuel out... dang or I might just run without change.

 

.94 is a decently safe guide for 91 octane.

.94 on my logger equaled 11.4 on a wideband so your mileage may vary.