Calc.VET: correcting MAF and calculating VE (in single log)

[joecar]

Yes, correct, a placeholder, you can use any logged pid here.

[joecar]

Alright so I loaded your tune and did some logging. I did three logs (really just two, the first was a quick spin around the block). I wasn't able to get some good time with high load/throttle opening. So today on my way to work, I used a stretch of fairly flat highway to log high load/throttle opening. I got a log there and one back. The log there seemed to give me pretty good data. It looks like my B5001 wants to come down a hair, and most of the data for B0101 wants to bump it up a bit. Can you take a quick look and make sure I'm on the right track with my thinking? I've attached my later two logs, and a modified tune based off the first log.


First log:
Attachment 20069
Secong log:
Attachment 20070
Tune:
Attachment 20068

I'll take a look at these tomorrow, sorry I'm running behind.

[pinstripebob]

No worries! I've kind of gotten addicted to this whole tuning thing. I've attached my latest tune for reference, but now I'm going after knock retard. For some reason I'm getting a few degrees of knock retard kicking in around 2800-3600 and .40-.64 grams/cyl. I've gotten to the point that B5001 is just about 1.00 after some logs.

Garrett_GTO_tuned_20160821_1.ctz

[n8dogg]

hey guys, I've been MIA, but back into a C5 vette so back into the tuning world! 1 of my LC-1's crapped the bed last night, I'll have to get my 2nd one up and running. I shut the door on the cords and I think I pinched a wire that didn't want to be pinched, darn!

Anyhow, I question about the Calc Vet VE map. In the how-to it says to use "Calculated VE %, BEN corrected" for the map data. When I use this, I get decimals as data, lower regions are around .5, upper regions 1.0, 2.0, 3.0, 4.0, 5.0. Why? Why isn't it a percentage like the VE table? If I replace "Calculated VE, BEN corrected" with "Calculated VE %", the data shows as it should. But don't I want the BEN corrected VE %?

If needed, I'll post up my log and PID's when I get home from work.

Thanks!

[joecar]

Post screenshots so I can see what is going on.


Use VE [g*K/kPa] instead for VE (in tunetool go Edit->Properties and set VE units to g*K/kPa).

[n8dogg]

Post screenshots so I can see what is going on.


Use VE [g*K/kPa] instead for VE (in tunetool go Edit->Properties and set VE units to g*K/kPa).

Thanks Joe, I figured it out. My OS is not compatible with Dyn Air Temp in the standard Calc VET PIDs file. I had to use the alternative. I did switch the VE table over to g*K/kPa, made life a little easier!

Question in regards to Lambda/AFR. Stoich setting in the PCM is 14.68 assuming 100% gasoline. We have (up to) 10% ethanol in our gas here. While I'm performing Calc VET tuning do I need to make any adjustments to the stoich/target AFR in the PCM? Or is that irrelevant when we tune the VE/MAF tables for lambda 1.0? Thanks!

[joecar]

Yes, for E10, set B3601 to 14.2.

[n8dogg]

But in my log Lambda averaged at 1.002. Does this indicate that E10 isn't actually 10%?Nate 02Z Calc Vet 4 18 17.efi

[joecar]

Yes, correct.

I'm told that alcohol content in gasoline can be +/-8%... i.e. your E10 can be close to plain gasoline.

~ by phone ~

[n8dogg]

Yes, correct.

I'm told that alcohol content in gasoline can be +/-8%... i.e. your E10 can be close to plain gasoline.

~ by phone ~

Wow! No wonder why sometimes after getting gas it feels like I gained some hidden power! Guess I'll stick to the gas station that yields me the closest to Lambda @ 14.68 AFR.