Hp tuners help. Lean condition.
Thread Starter
Pro
Joined: Sep 2011
Posts: 568
Likes: 27
From: nj
Hp tuners help. Lean condition.
Hey guys I have a 1998 ls1 with a vortec supercharger. 3.8 pulley 60 lbs injectors. During normal and spirited driving I see about 14-15.5 on my aem wide band. Under wide open throttle I see about 10.5. I want to get that number more to 11.5-12. In my tables in hp tuners how do I adjust my table to richer the wide open tables?
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Before you do anything verify your wideband is working correctly.
Go get some data logs and see at what rpm range its goin lean
If the rest of your tune is straight then you can change your WOT AFR with ease.
don't take this personal.. If your asking how to do this maybe you should take your car to a pro.
But either way here's what you do...
The table to modify your WOT fueling is the Power Enrich Fuel Multiplier vs. RPM table. It's based off from engine RPM and a corisponding equivelance ratio. (A number generated from a forumula which equals a specific Air/Fuel Ratio)
In your case to yield an 11.5 : 1 AFR the number you want to enter in the table would be. 1.278
The math goes like this 14.7/1.278 =11.50
To find the table. Open up your tune click on engine then click on the fuel control tab then click on Power Enrich. Under the power enrich sub section click the EQ ratio vs RPM button.
Go get some data logs and see at what rpm range its goin lean
If the rest of your tune is straight then you can change your WOT AFR with ease.
don't take this personal.. If your asking how to do this maybe you should take your car to a pro.
But either way here's what you do...
The table to modify your WOT fueling is the Power Enrich Fuel Multiplier vs. RPM table. It's based off from engine RPM and a corisponding equivelance ratio. (A number generated from a forumula which equals a specific Air/Fuel Ratio)
In your case to yield an 11.5 : 1 AFR the number you want to enter in the table would be. 1.278
The math goes like this 14.7/1.278 =11.50
To find the table. Open up your tune click on engine then click on the fuel control tab then click on Power Enrich. Under the power enrich sub section click the EQ ratio vs RPM button.
Last edited by MVP'S ZO6; Sep 7, 2013 at 02:12 AM.
Supporting Vendor
Joined: Apr 2012
Posts: 2,673
Likes: 369
From: Forney TX
First of all, what MVP is saying assumes your PE table wasn't hacked or "raped" Sounds like your spirited driving situation might be a result of TPS% required to enter PE, so log it to see what your actual commanded AFR actually is during your spirited driving episodes and make sure you're in PE that way. You can also log EQ ratio to see what that shows. Verify your PE is mathematically correct and if not, you'll need to calculate the percentage off your fuel is and multiply your existing PE values by that percentage converted to decimal and subtracted from 1.0
In other words, if you're rich at 10.5 and you want to lean it out to 11.5 at a specific RPM area, such as 4400, multiply that section of the PE table by .91 and it will lean it out by 9%. I suggest you validate your wideband information and even consider making WOT hits on fresh plugs and checking them carefully to make sure you're actually lean as well as making the changes in steps while testing and watching for knock.
In other words, if you're rich at 10.5 and you want to lean it out to 11.5 at a specific RPM area, such as 4400, multiply that section of the PE table by .91 and it will lean it out by 9%. I suggest you validate your wideband information and even consider making WOT hits on fresh plugs and checking them carefully to make sure you're actually lean as well as making the changes in steps while testing and watching for knock.
Burning Brakes
Joined: May 2009
Posts: 793
Likes: 3
From: Scotland UK
Being frank, not knowing the difference between lean and rich and wanting to command 12:1 on a supercharged LS1 then asking about modifying the tune?...
Here's where I would start:
http://www.hptuners.com/forum/forumd...etting-Started
http://www.hptuners.com/forum/forumd...te-Enhanced-IO
http://www.hptuners.com/forum/forumd...ehicles-(Gen-3)
Here's where I would start:
http://www.hptuners.com/forum/forumd...etting-Started
http://www.hptuners.com/forum/forumd...te-Enhanced-IO
http://www.hptuners.com/forum/forumd...ehicles-(Gen-3)
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Drifting
Joined: Mar 2011
Posts: 1,412
Likes: 15
From: Richardson TX
You're going to want the car to run rich under boost. An 11.5 AFR reading under boost at WOT is what you should target (if anything be richer).
You shouldn't have to put values in the power enrichment table less than 1. If you're too rich, then adjust the main VE table. You want the engine to squirt extra fuel when you're WOT compared to say half throttle. If you adjust the PE table to .9 or whatever, then you're going to have the car run extremely rich when you're not in WOT.
Not enough boost won't really matter. You're running a speed density tune, which means the computer basically looks at your manifold pressure (boost) to figure out how much fuel to squirt in. If you have less boost, you'll have less fuel. The computer doesn't know if your belt is slipping or whathave you, it just knows how much boost you have, and puts in enough fuel for that boost pressure.
You shouldn't have to put values in the power enrichment table less than 1. If you're too rich, then adjust the main VE table. You want the engine to squirt extra fuel when you're WOT compared to say half throttle. If you adjust the PE table to .9 or whatever, then you're going to have the car run extremely rich when you're not in WOT.
Not enough boost won't really matter. You're running a speed density tune, which means the computer basically looks at your manifold pressure (boost) to figure out how much fuel to squirt in. If you have less boost, you'll have less fuel. The computer doesn't know if your belt is slipping or whathave you, it just knows how much boost you have, and puts in enough fuel for that boost pressure.
Thread Starter
Pro
Joined: Sep 2011
Posts: 568
Likes: 27
From: nj
Ok I will data log this week. And see what is going on with the car. I need to learn these things so after a week or so of playing with my hp tuners I would probably have better terminology for you guys. Playing with wide hands and tuning a car is a new avenue for me so like I said you have to try it to learn it.
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Ok I will data log this week. And see what is going on with the car. I need to learn these things so after a week or so of playing with my hp tuners I would probably have better terminology for you guys. Playing with wide hands and tuning a car is a new avenue for me so like I said you have to try it to learn it.
Do you have the pro version of HP Tuners? If so then is you wideband connected to the HP tuners interface?
Thread Starter
Pro
Joined: Sep 2011
Posts: 568
Likes: 27
From: nj
Unfortunately I did not buy pro but wish I did. Here are the tables. Could one of you guys look at them and tell me the values that would need to be added in the correct section/RPM of the chart?
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
It's already been stated in this thread how to change that table and even what number to put in. But more importantly.
Have you verified your wideband is working correctly?
Have you actually data logged? You need to data log WB info after you verify it's working correctly.
You need to do that stuff before you go jumping the gun changing stuff man otherwise your shooting in the dark. you risk trashing your engine bro. Please for the love of God listen.
Have you verified your wideband is working correctly?
Have you actually data logged? You need to data log WB info after you verify it's working correctly.
You need to do that stuff before you go jumping the gun changing stuff man otherwise your shooting in the dark. you risk trashing your engine bro. Please for the love of God listen.
Thread Starter
Pro
Joined: Sep 2011
Posts: 568
Likes: 27
From: nj
I simply asked questions I have not made changes or will make changes until I know its right. Also I stated I do not have pro I cannot data log the wide band into my HP tuners. Unless there is another way of doing it I can only watch the wide band live as I drive. Also the wide band is working correctly.