Just lookin for additional log advice

[ZenkaiRacerDsM]

Heres my log. Seems pretty flat in areas. What do you all think? Below 4k rpm if I punch it in 3rd the boost fluctuates like crazy so its only steady after 4k. Nearing 7k it creeps to about 18psi. Thanks.

 

[->PrOjEcTGS<-]

I'm no expert at reading 2g logs. I'm used to being able to see knock. With that said. By looking at your timing curve it seems to me that you are knocking upon going WOT from 3500rpm to 4000rpm. This makes sense seeing that you have an 18g and that it spools roughly at that RPM. Then from there it looks like it goes away then comes back at 4300rpm to 5000rpm. Now, looking at your O2V it seems like you are running really really rich. that 1.0v should be more like .94-.96 maybe even leaner.

I would look into why your boost fluctuates like it does. What are you trying to keep it at? You could have a large boost leak. That would explain why you are rich and possibly the knock/pulled timing.

Do you have a WBO2? Everyone needs one.
Any Fuel mods? You're running an 18g better get some larger injectors and a pump to support that thing!!

 

[ZenkaiRacerDsM]

Yeah, I thought 1.00 would mean rich. But I had to add more fuel to get rid of bigger timing dips. But I do have fuel mods just put them in. A safc2, fuel lab fpr, 255lph hp, and evo 560cc injectors. I have an electronic bc on the way so hopefully it will make the boost more stable. When. Do an all out rn from a stop the boost is fine. It's just when it gets punched at low rpm.

I would elaborate more on the boost fluctuation, but I'm posting frm my phone. Forgot to mention I don't have a wideband yet. I know I need one, it's on the list.

 

[ZenkaiRacerDsM]

Ok made some adjustments and got my EBC installed. It still fluctuates all over if I go WOT at low rpms in 3rd. Ive had these boost spikes ever since I got a bullseye turbine housing. And no matter what I do I cant get the boost stabilized unless I run like 9 psi.

Anyways this is a log of a 1-2-3 pull. The boost goes from 14psi to 20psi raising progressively as the rpms raise. Setting it up to creep to 20psi was the only way for me to reach that target boost level. The bullseye housing does NOT get along with an internal gate at all. My next mods are a HAFE manifold and Tial 38mm.

My timing curve looks alright, but the o2 voltage is supposedly meaning really rich. I'm running down to autozone today for some new plugs. These are really old and are blowing out due to the higher boost levels. Was only running 10psi before the fuel mods.

 

[Rob10_99]

Since your timing is all over the place, that would mean knock to me.(first log)
2nd looks a lot better, still richer than the first. New plugs are a must.
I would go with coppers and swap them out quite often. Get those plugs, gaped @ .28 and do another pull.
And yes 1.x is rich for narrowband 02, get a wideband, their worth the investment.

 

[ZenkaiRacerDsM]

Thing is if I go any leaner theres obvious timing dips. I dont know why the o2 is showing so lean. My safc adjustments from -11 from 4k rpm to -9 at 7k rpm. I just picked up some BPR7's. Theres 6's in it right now. Once it cools down a lil Ill swap the plugs.

 

[ZenkaiRacerDsM]

I got some new plugs and wires in. But I havent been able to tune with my cutout open since I close it for daily driving.

Anyways I went and logged another 1-2-3. I was making another map for the boost with the cutout closed, which is about 12psi. The timing goes flat from 6400 up but eventually rises one degree. Im thinking it could use some fuel there. Anyone find it odd how much timing Im running?

 

[VETTE_50_TH]

What are you logging with? 32 degrees of timing that high into the rpm is redicious. I would suggest posting knock and see what you are hitting. You still seem to be running to much fuel and that timing is all OVER the place. Do you have or can you get a pocket logger? I would also check your base fuel pressure and start over on your AFC and reset it. And start over.

James

 

[ZenkaiRacerDsM]

I dont know if you noticed, it was a 1-2-3 pull, not just a 3rd gear pull. It was barely in 1st since it was from a roll. The timing although high is consistantly ramping up with the only flat spot being from 6400 up in third gear where I have added some fuel at that point. The timing spikes above 30 are where I am shifting. The 27 degrees of timing at the top of third is the highest number at WOT.

Im logging with a pocketlogger on a 2g so I cant see knock. Once the cable I ordered comes in Im going to be logging with that new MHI scan, so hopefully I can log it then.

I gotta say though, it pulls pretty damn hard with the timing like this compared to 16 degrees max.

 

[knochgoon24]

You should really look into a wideband. Then you can see if you actually are that rich.

 

[VETTE_50_TH]

Do me a favor, and do a proper pull please. Go from 2k to 7k in third gear. And, as said above, a wideband would be very nice to have.

James

 

[delta448]

As said, a wideband would help tremendously.

How sure are you that your O2 sensor is good? It looks okay from the part of the log I can see... but does it cycle down to at least 0.2 at idle/light throttle?
If you're pretty confident in it, I'd start leaning things out a little at a time until you see .94-.98 on the front O2 under WOT, -that's still rather rich even though narrowband readings won't tell you very accurately how rich-, and then post another log including timing and airflow.

Until you see less than 1.0 volt, you can't know you're not hitting rich knock, especially at throttle tip-in. I think the timing in the second log looks much better and especially looks fine approaching redline, don't add fuel there until you can see exactly what's happening elsewhere. At high rpm, a little mistake becomes a big problem. Once again, a wideband should be next on your parts list.

Your 560cc injectors are about 24% larger than stock, if you're only taking out 11% max, I'd start slowly pulling out more airflow in small increments and keep a careful eye out for dips in the timing curve, I think you'll see positive results.

What do your low and mid fuel trims look like, and can you post a log with airflow?

 

[ZenkaiRacerDsM]

My cable just came in today! So Im going to give MHI scan a try whenever I get time, but this weekend for sure.

Is tuning as if Im drag racing so bad if thats pretty much the only time I WOT it? The reason I cant do a low rpm 3rd gear pull is because the boost will spike hardcore and bounce like a bouncy ball before stablizing and then creeping to 20 psi. I cant tune to that at all. But during a 1-2-3 pull it just spikes once then creeps.

This o2 sensor has around 25k on it with near stock boost levels until now.