[Bme30]

So What do you all think??? 1st log is map 1, and 2nd log is map 4 with meth 70/30
The car has DCI, catless dp on 93oct.
5-23 stage 2 aggressive.

Map 1


Map 4 Meth 70/30 mix. See the deviation in the fuel trims with meth flowing?

[Slops]

With meth obviously looks 10 times better. The first log your timing is pulled probably because of the lack of good octane and high intake temps. I'd like to see what your boost targets look like

[Bme30]

Originally Posted by Slopp

With meth obviously looks 10 times better. The first log your timing is pulled probably because of the lack of good octane and high intake temps. I'd like to see what your boost targets look like

So the separation in the fuel trims isnt detrimental? I should have done some boost targets, but didn't. I will make sure to logs those on my next logs!

[E3r2E9r]

I think your trims are ok they just need to be logged in separate graphs. I think they are overlapping unless that was fixed on PROcede software recently?

[Bme30]

I was under the impression that I may have o2 sensor(s) on the way out?

Why would they be together without meth flowing and than separated while meth is flowing.

[jdbretz]

Originally Posted by Bme30

I was under the impression that I may have o2 sensor(s) on the way out?

Why would they be together without meth flowing and than separated while meth is flowing.

It could either be uneven Meth distribution between the 2 Banks, or your injectors are having a hard time keeping up. There was a little separation between the 2 Banks on Map 1 as well, but it may be exaggerated by the additional boost while running Map 4.

[Ilma]

Originally Posted by Bme30

I was under the impression that I may have o2 sensor(s) on the way out?

Why would they be together without meth flowing and than separated while meth is flowing.

Having fuel trim deviation while meth is flowing is pretty typical on a lot of logs.

The reasoning is that the meth is not being evenly distributed between banks due to lack of time to atomize evenly.

Some have reported improvements to trims by relocating the nozzles further upstream, thus giving the mixture more time to homogenize.

If your trims are fine when NOT flowing meth, then I wouldn't worry about the O2 sensor being the culprit here.

Which meth kit are you using.....Vishnu PWM?

[Bme30]

Originally Posted by Ilma

Having fuel trim deviation while meth is flowing is pretty typical on a lot of logs.

The reasoning is that the meth is not being evenly distributed between banks due to lack of time to atomize evenly.

Some have reported improvements to trims by relocating the nozzles further upstream, thus giving the mixture more time to homogenize.

If your trims are fine when NOT flowing meth, then I wouldn't worry about the O2 sensor being the culprit here.

Which meth kit are you using.....Vishnu PWM?

Yes I'm using the Vishnu pwm kit. Everything is setup the way is comes from them.

[Bme30]

Originally Posted by jdbretz

It could either be uneven Meth distribution between the 2 Banks, or your injectors are having a hard time keeping up. There was a little separation between the 2 Banks on Map 1 as well, but it may be exaggerated by the additional boost while running Map 4.

I have also never had the injectors replaced.....was hoping I wouldn't need too. I only have 39k on my 2007.

[cn555ic]

Having nozzles at the elbow is the best location And will give better chance for atomization to be evenly dispersed into charge pipe

[3-Serious]

Everythig looks decently on par to me I have a HFS-4 kit on my car and but a Vishnu charge pipe and the difference between my fuel trims looks similar although they could be closer together I see a variance between 4% and -12. Also Vishnus charge pipe has the meth nozzles placed in a pretty optimal spot.

[drewmeyer87]

Looks good, I'm jealous, wish my logs ever looked that good.

Shiv said in another post a few days ago that it is typical to see a delta of +/- 10 on the fuel trim banks with meth injection and that there is no real detrimental effect. Yours look on par with that assertion.

Now just throw in some e85 and that map 1 log will look better!

[Bme30]

Originally Posted by drewmeyer87

Looks good, I'm jealous, wish my logs ever looked that good.

Shiv said in another post a few days ago that it is typical to see a delta of +/- 10 on the fuel trim banks with meth injection and that there is no real detrimental effect. Yours look on par with that assertion.

Now just throw in some e85 and that map 1 log will look better!

Thanks, I'm just trying to figure this all out. I'm not making the power I want on 93 and was hoping to figure it out before e85.
I only make 331/385 with dci, catless dp and no meth. I was really hoping for the 350 range like so many others.

I make 389/440 with meth flowing.

[sickem]

Originally Posted by Slopp

The first log your timing is pulled probably because of the lack of good octane and high intake temps.

I am a log-reading newb. What represents timing pulls on the graph? is that those fluctuations around peak rpm in the CAN ignition adv curve?

[Slops]

Originally Posted by sickem

I am a log-reading newb. What represents timing pulls on the graph? is that those fluctuations around peak rpm in the CAN ignition adv curve?

You can't definitively say it pulls timing because of knock because the log is not zoomed in enough. Anything above 2-2.5 deg drop at any given point during load indicates a little knock. Usually because octane is a little low and iat is a little high. It just seems that a 4deg actual ignition is low during mid pull but it does gain a little more ground towards the end

[Longboarder]

Originally Posted by Bme30

Thanks, I'm just trying to figure this all out. I'm not making the power I want on 93 and was hoping to figure it out before e85.
I only make 331/385 with dci, catless dp and no meth. I was really hoping for the 350 range like so many others.

I make 389/440 with meth flowing.

From your meth log it looks to me like you can make a bit more boost (0.5 to 1.5psi) across the range safely...even on these hot summer days with 97 deg IATs. This *should*equate to more power. Using the standard 65 start boost maps with a 50/50 meth/water concentration and catlezz dps, i would get 18psi for some reason. When I changed to 70 start boost i hit 19psi and lost about 5 RWHP on the dyno. I created a custom boost profile to ramp boost from 13psi to 18psi @ 4,500 rpms and then ramp down to 16psi at redline which gave me the best results. Have you played with the boost settings at all?

[Bme30]

Originally Posted by Longboarder

From your meth log it looks to me like you can make a bit more boost (0.5 to 1.5psi) across the range safely...even on these hot summer days with 97 deg IATs. This *should*equate to more power. Using the standard 65 start boost maps with a 50/50 meth/water concentration and catlezz dps, i would get 18psi for some reason. When I changed to 70 start boost i hit 19psi and lost about 5 RWHP on the dyno. I created a custom boost profile to ramp boost from 13psi to 18psi @ 4,500 rpms and then ramp down to 16psi at redline which gave me the best results. Have you played with the boost settings at all?

I have messed with the setting some, but only the start boost. I too changed it from 65 to 70 and it feels like the cars is slower also. Almost like it doesn't boost as fast, I guess it feels a little less responsive. I have not changed some of the settings that you have.
I also have been following your posts a little and am very envious of the power you are making.

[Longboarder]

Originally Posted by Bme30

I have messed with the setting some, but only the start boost. I too changed it from 65 to 70 and it feels like the cars is slower also. Almost like it doesn't boost as fast, I guess it feels a little less responsive. I have not changed some of the settings that you have.
I also have been following your posts a little and am very envious of the power you are making.

I can walk you through the steps of how to create a custom boost profile if you like. It's quite fun actually. I did it initially when I was trying to dial in off-the-line traction. I played around and logged a bunch of times until I found a combination that worked for me.

I found that I liked the violent rush of going from 13psi to around 18 to 18.5 psi instantly at 4,500 rpm and then tapering gradually down to 16psi. I found that it was also good for off-the-line traction as I could just put the auto tranny in 2nd gear and launch with no wheel spin whatsoever with this profile.

On the dyno, torque using this boost profile was a bit lower from 3,000 to 4,300 as compared with the stock map settings from Vishnu at 65 start boost, but once I hit 4,500 rpm boost would spike to 18-18.5 and hold for long enough to provide for a nice power increase up to peak power at around 5,500 RPM, then the taper to redline was same as with the stock 65 start boost settings. You can see my boost, torque and HP curves for my stock boost, standard 65 start boost, and custom boost profile which probably explains it pictorally much better than I just tried to explain > see post 203 > http://www.e90post.com/forums/showth...416797&page=10

[The Ghost]

Originally Posted by Longboarder

From your meth log it looks to me like you can make a bit more boost (0.5 to 1.5psi) across the range safely...even on these hot summer days with 97 deg IATs. This *should*equate to more power. Using the standard 65 start boost maps with a 50/50 meth/water concentration and catlezz dps, i would get 18psi for some reason. When I changed to 70 start boost i hit 19psi and lost about 5 RWHP on the dyno. I created a custom boost profile to ramp boost from 13psi to 18psi @ 4,500 rpms and then ramp down to 16psi at redline which gave me the best results. Have you played with the boost settings at all?

He knocked twice in a single gear on meth. I wouldn't make it more aggressive at all.

[Longboarder]

Originally Posted by The Ghost

He knocked twice in a single gear on meth. I wouldn't make it more aggressive at all.

Actually that's just the post shift timing drop for the 6ATs. Most of us have them no matter if you are running 8psi or 18psi.

[Bme30]

Originally Posted by The Ghost

He knocked twice in a single gear on meth. I wouldn't make it more aggressive at all.

I can see the one right after the shift, but what is the main cause of knock?

[Bme30]

Originally Posted by Longboarder

Actually that's just the post shift timing drop for the 6ATs. Most of us have them no matter if you are running 8psi or 18psi.

I'm a 6mt. But I might take you up on that offer when I get this car running perfectly. Although zero codes or hiccups when pushing it!