SPRAYED 01

iTrader: (22)

This my first time with methanol injection and boost. The car was fully tuned and proven and the set up is unchanged. All I added was a dual nozzle meth kit from alky control. I did a quick 2 to 3rd gear blast today with the meth coming on at about 5psi. I kept the fuel cells the same until 3600rpm and 145kpa. I leaned it out a little after that to compensate for the meth. I lower wot timing to 10 for now just to be safe while I dial in afr.

On my gauge in the car the wide band was reading 10.0 afr towards the end of the run, whats logged is different and that's whats throwing me off. Its an aem wide band. On the log its around 10.5 with meth but there are a couple times that it goes to 11.4 and the 12.97 for no reason. What do you guys think?

Setup is a 9.5:1 comp forged 370 with a 232/236 low /600 lift 115lsa cam,stock ported heads, stock ls6 intake and tb,80lbs injectors, flt level 7 4l605e,moser 9inch with 325 gears, 3600 vig verter.

Thanks
Alex

SPRAYED 01

iTrader: (22)

Any one on this?

01midmetws6

iTrader: (1)

You should throw in the config file you are using as well. Makes reading data and making recommendations much easier.

SPRAYED 01

iTrader: (22)

Ive tried to upload the configuration, it says invalid file.

SPRAYED 01

iTrader: (22)

I can email it.

spoolin turbo

Grab another wideband sensor if you can and see if it changes. If anything I would go with the wideband over the log. That is what you are using to tune the car off of essentially.

A local had the same issue....changed the sensor and it started reading better, afr changed 1 whole point.

SPRAYED 01

iTrader: (22)

Ok just ordered a replacement. I don't think its off that bad though. With the original tune and no meth it stays around 11.2-11.4 just like it was tuned for. What are some other reasons why afr wouldn't be smoth?

LS1 240sx

iTrader: (1)

watching the log and looking at your VE map you have "117" value for 6k rpm vs 165 kpa then you have "107" value for 6.4k rpm vs 165 kpa.

In your logs I see you are revving to 6200 rpm so in some pulls you might be going higher in rpm and causing to give diff. afrs. This is an assumption. to rule it out I simply highlighted the 6400 rpm line from 70 kpa and down and mutiplied the values by 1.07.

try that and see if you keep getting diff. readings in afr. could be the sensor to because ive seen aem widebands behave dumb sometimes and a simple sensor swap fixed it.

Ryans99ls1

iTrader: (16)

to be honest man, i think its the AEM. Mine was dead on when i got my car tuned last year and the thing was new. Got it retuned this year and it reads .5 point leaner from my tuners wideband. It has always been way off at idle, even new. If i tried to tune off this thing, my motor would be gone. I absolutely trust my tuners because the car runs perfect and is still alive..

I basically just "zero" myself off his gauge. His was reading 11.0 through the whole run and mine skips between 11.4 and 11.6 during the same pull. My AFR gauge basically serves as a spot check to make sure everything is cool. I really only look at it after i fill up to see what the ethanol content is. Gets leaner, its over 85%. Gets richer, its under 85%. Thats all beside the point though..

SPRAYED 01

iTrader: (22)

Ls1240sx, keep in mine im new to the program but what does the main ve have to do with wot fueling? I was under the impression all wot fuel changes are done in pe,eq ratio and boost enrichment,eq ratio vs map.

01z28camaro,
With the pump gas proven tune 1.240 was 11.4 on tuner wideband and on mine. I went to 1.215 to lean it out for the meth. So yes on no meth it comes out to around 11.8 -12.0 but with dual 15 nozzles im trying for 10.5-10.8afr. Does that make sense?

mike13

iTrader: (27)

How's the spool? Looking at your spark tables there isn't much timing in the motor. I would think the motor would be real sluggish.

mike13

iTrader: (27)

I wanted to say not picking on you or trying to be a jerk. My car was slow to spool and it was extremely conservative timing.

LS1 240sx

iTrader: (1)

its another map to adjust fuel in SD mode, Your PE table should be commanding exactly what you want to see on the wideband. If you want 12.8 across the board, your PE table should say 1.147 all the way across. However, Commanded AFR = Actual AFR only when you have tuned the VE and/or MAF tables correctly.

SPRAYED 01

iTrader: (22)

Ok well I was calculating 14.7/1.240 in pe which is 11.85 and the wideband was reading 11.4. I did some research and found out that for fuel that is 10% ethanol you need to divide by 14.2. That would come out almost perfect to the wideband reading of 11.4.

Now thats on the pump gas no meth tune. With the meth added I wouldnt know how to calculate command afr as the computer doesnt know about the meth coming in.

My thoughts are that I now know that my ve is correct because command afr is correct (at least according to my wideband gauge) so I can just tune for 10.5 to 10.8 afr with the meth now.

The timing table in my tune is setup just for dialing in afr right now. Im new to this and wanted to keep it safe while learning. Ill probably end up putting the pump gas no meth timing table back in later which goes to 18 degrees and alittle higher in the spool areas.

But it actually feels no different in spooling then it was before. Its a triple ceramic ball bearing turbo all wrapped with blanket and a stalled auto. Its pretty instant for a turbo car.

SPRAYED 01

iTrader: (22)

Here is a log from last night. I corrected the config to show IDC. Its alittle better then the other but there is still a spot that it goes into the 11s afr for no reason. It does show the IDC drop by 2% when it does that. Not sure why that would be. All I did was change my wot timing to 12 and not 10. I did this just to bring it up a little to a more real world timing as Ill never only run 10 degrees even on just pump gas.

SPRAYED 01

iTrader: (22)

Would changing the stoich value to 14.2 mess up my ve? All the gas i get around here is 10% ethanol.

SPRAYED 01

iTrader: (22)

To clarify im seeing 10.5 to 11.0 with it set at 1.21 but also with meth spraying. I just loaded the pump gas tune and gave it a quick blast. With 1.240 and no meth im getting 11.4 to 11.8.