Guys, I finally have my FAST up and running and the car I ideling but I wonder if someone can guide me to the right table to get things moving forward from here.

Is it the VE table or the the "Base Fuel" table?

what table do you ususally use to tinker with.

 

You want to tinker with the VE tables. the base fuel is your desired A/F ratio. You should have a pretty good idea of what air fuel ratio you want to run, then you adjust the VE tables to achieve the desired A/F ratio. If you have wide band enabled, you adjust the VE tables to decrease the O2 correction to as little as possible, less than 5-7%.

good luck!

 

You will want to modify the VE vs RPM and MAP table. Not sure what Base Fuel table your talking about, but when using the pull down menu's on the Windows version of CCom the above table is listed as the Base VE table. If you have the Wide Band Option then you will want to watch the O2 correction values. They list deviation of the Air Fuel ratio from the values you set in the Target Air Fuel Ratio vs RPM and MAP. Adjust the VE tables untill you have less than 5% deviation either way. Great thing about FAST is you can adjust everything while the car is running. Someday i'll get mine working again.

Bill

 

Hey I was playing with it this afternoon.

Just basically ideling and moving to about 1800 rpms.

WAY COOOOL.

I have a mother of a vibration at low RPM but I think I need to check the engine mounts to ensure they are tight but I had to crank up the VE tables at idle from 50 (included in the DEMO file)to 95 and then my AF ratio finally started coming down from 15.94 which is where it was 'stuck'. Very cool to play with as compared to LT1 edit - of course you pay for it.

What target should I be looking for at idle. 14.7 right?

Shaun

PS: Bill I read your website. I know the feeling but I don't think I have had as much trouble as you. Although I too have wasted a bunch on money chasing ghosts. You know what, we all all freakin' mad.

 

who put that in your head? . Keep me posted on how things go Shaun.
CoryM

 

you have your VE at 95 for idle??? You should be near 100 when you are at peak torque output from the engine!! What is your fuel pressure, something is not right here.

Bill

 

Hmmmm.

base fuel pressure is about 38#'s

 

Did you change your injector constant to match your injectors?
Did you make sure the MAP sensor value is the same as the MAP you're running?

Something's wrong. feel free to send my your .gct file and modifications and I'll look it over for you.

My VE table is set around 35 for the idle range.

...Brady

 

Sending it to you Brady and thanks for the offer. I'll send you a data log and the tune.

 

Keeping in mind that the car is blown.... how much do you think that effects the VE at idle? Does that blower pump a lot of air at idle Shaun? I realize its likely not much and I cant imagine it would bring it up to 95% at idle. Is there a calculator to figure out VE for blown applications?
CoryM

 

Yes, I would say that there IS a fair amount of air flow at idle, even at idle on a 15# blower.

 

Ya, I just cant for the life of me figure out how to calculate VE for a blown application. Ill have to ask my dad (engineer type). Im curious more than anything. Id assume at full boost you would be around 120-130% but thats just guessing really.
CoryM

 

Do you have a 360" engine with 21# injectors?

If not, email your engine size, injector flowrate, MAP sensor (1 or 2 or 3 bar) and anything else pertinant, and I'll send you a file to use. I wouldn't recommend running the file you sent me.

 

Yep that will do it

 

I sent the wrong file

I'll have to check it again.

Sent you email Brady on my set up