OpenFlash Tablet off-the-shelf E85 Datalogs on stock car

[Captain Insano]

I did find this thread, but not sure which of these options you used. There are a couple different variations in here. Which one of these did you do?
http://www.ft86club.com/forums/showthread.php?t=49634


Your original description of what you did to the intake in your 200whp for $1000 thread...
*For the intake, the only thing I modified was the snorkel. I cut the front bit in half and then widened the remaining duct by heating it up and forcibly opening it up with my hands. Took maybe 15 minutes and didn't cost me anything. But by my accounts, it was worth ~5whp compared to the stock unmolested air duct/snorkel. On the road, the modified snorkel kept logged intake temps only 5 deg F above ambient. By comparison, removing the snorkel completely, intake temps rose up to 20-25 above ambient. With the higher IATs, the car is noticeably less snappy and far more prone to knock retard.

[Captain Insano]

Bump... @shiv@vishnu and @Robert@vishnu
Any pics or better info on how you modified the intake? I have on intake and don't want to F it up when I make my cuts!!

[steve99]

Originally Posted by Captain Insano

Bump... @shiv@vishnu and @Robert@vishnu
Any pics or better info on how you modified the intake? I have on intake and don't want to F it up when I make my cuts!!

http://www.ft86club.com/forums/showthread.php?p=1297833

I think shiv also shoved in a 20oz soda bottle and heated it to expand the intake of the cut down snorkel.

[jc2532]

Here are my e85 logs. I am not sure what to look for; let me know what you think!

http://www.datazap.me/u/jtchupp/e85-...log=0&data=1-4

[jc2532]

nothing?

[Shiv@Openflash]

Originally Posted by jc2532

nothing?

Not much to say yet. Doesn't look like you gave it much learning time since the fuel trims are still at 0%. Definitely needs more driving before you can datalog anything useful.

[jc2532]

Originally Posted by shiv@vishnu

Not much to say yet. Doesn't look like you gave it much learning time since the fuel trims are still at 0%. Definitely needs more driving before you can datalog anything useful.

ok cool, thanks!

[Kronos]

Hello everyone! I got my OFT a week ago and I have been running the e85 tune ever since. So far I've put just over 100 miles on the tune.

I think I know what to look for regarding a few parameters (ie the afr should be as close to 12 during wot as possible) however I still have absolutely no idea what I'm doing sometimes the afr hit close to 20 during cursing which made me nervous. I have no idea if this is acceptable or not. This might have happened when I let off they gas pedal. I don't quite remember but it's in the log.

Here is a log I took yesterday.

A pull in 3rd gear.
Temps were high 20's.
About 100-120 miles on the tune I'd say.

The road was ok at best. Not the smoothest and had very slight incline.

http://www.datazap.me/u/kronos/e85-data-log-1


It looks like my afr went down to around 11.5 in the higher rpms. Was this because i was slightly letting off the gas pedal? I noticed in the log at the higher rpms I started letting off the gas a bit.


Let me now what u guys think!


I'll do another log tomorrow. On a much better road where I will be able to get more clear results

Thanks in advance

[jc2532]

Originally Posted by Kronos

Hello everyone! I got my OFT a week ago and I have been running the e85 tune ever since. So far I've put just over 100 miles on the tune.

I think I know what to look for regarding a few parameters (ie the afr should be as close to 12 during wot as possible) however I still have absolutely no idea what I'm doing sometimes the afr hit close to 20 during cursing which made me nervous. I have no idea if this is acceptable or not. This might have happened when I let off they gas pedal. I don't quite remember but it's in the log.

Here is a log I took yesterday.

A pull in 3rd gear.
Temps were high 20's.
About 100-120 miles on the tune I'd say.

The road was ok at best. Not the smoothest and had very slight incline.

http://www.datazap.me/u/kronos/e85-data-log-1


It looks like my afr went down to around 11.5 in the higher rpms. Was this because i was slightly letting off the gas pedal? I noticed in the log at the higher rpms I started letting off the gas a bit.


Let me now what u guys think!


I'll do another log tomorrow. On a much better road where I will be able to get more clear results

Thanks in advance

When you let off the gas pedal you're afr should go really high. Afr is the air to fuel ratio. The higher the number the less fuel is being injected and the more air. As you coast, the car drops the amount of fuel to almost nothing since the momentum and the inertia of the car keeps the engine running and not fuel.
Anyway, a high AFR (aka running lean) is normal when you have the throttle closed (foot off the gas). The AFR numbers that you should be concerned about are afaik when the throttle is around 20-30%.

[jc2532]

Also this is why to keep the car in gear while you're coasting. The momentum is keeping the car running instead of fuel. If you're coasting and the car is in neutral, the engine needs fuel to keep running at idle.

[Kronos]

Thanks jc2532. That explanation really did help. It was very clear .

I've heard shiv say that what matters are the numbers a WOT.

I'm not saying you are wrong, you sound like you know what you are talking about. I'm just curious why partial throttle is significant as well. I have lots and lots to learn. And I've always heard it's better to keep it in gear while cruising but never knew why. That makes so much sense now.

Also, how do you think my log was looking . During my run in third gear when I was at 6000 rpm and 90% throttle I was around 11.5 afr. Is this normal or is this running a bit low or rich as I should put it. Or was it rich because I was partial throttle? So many questions!! Haha

Thanks for taking the time to explain this stuff. It is very much appreciated



Edit: i think i found my answer in the sticky tuning reference guide thread

"Typically a ratio above 14.7:1 is considered lean where under 14.7:1 is considered rich. The engine application determines the optimal point. Typically tuners will run a richer mix through higher RPMs (more fuel than the engine can burn) to cool the cycle and help catalytic converter performance. "

[jc2532]

Originally Posted by Kronos

Thanks jc2532. That explanation really did help. It was very clear .

I've heard shiv say that what matters are the numbers a WOT.

I'm not saying you are wrong, you sound like you know what you are talking about. I'm just curious why partial throttle is significant as well. I have lots and lots to learn. And I've always heard it's better to keep it in gear while cruising but never knew why. That makes so much sense now.

Also, how do you think my log was looking . During my run in third gear when I was at 6000 rpm and 90% throttle I was around 11.5 afr. Is this normal or is this running a bit low or rich as I should put it. Or was it rich because I was partial throttle? So many questions!! Haha

Thanks for taking the time to explain this stuff. It is very much appreciated



Edit: i think i found my answer in the sticky tuning reference guide thread

"Typically a ratio above 14.7:1 is considered lean where under 14.7:1 is considered rich. The engine application determines the optimal point. Typically tuners will run a richer mix through higher RPMs (more fuel than the engine can burn) to cool the cycle and help catalytic converter performance. "

I read the thing about the 30% throttle somewhere, I may be wrong. I also am new and have the same questions. I just happened to know about the coasting/fuel cutoff thing from a long time ago. Here is a wikipedia article about it if you wanna read more.

https://en.wikipedia.org/wiki/Energy...ing_or_gliding

when I have time I want to read more into tuning. [ame="http://www.amazon.com/Engine-Management-Advanced-Greg-Banish/dp/1932494421/ref=sr_1_2?ie=UTF8&qid=1393540233&sr=8-2&keywords=tuning+car"]I heard this is a great book to start with.[/ame]

[Proof]

Anyone car to critique this log? 4th tank of E85 and power feels great!

http://datazap.me/u/professor/e85-lo...ta=1-6-7-10-12

[Shiv@Openflash]

Originally Posted by Proof

Anyone car to critique this log? 4th tank of E85 and power feels great!

http://datazap.me/u/professor/e85-lo...ta=1-6-7-10-12

Looks excellent. I'm currently running our Stage 2 car on E85 too. Forgot how good it felt!

Cheers
shiv