On a Lighter Note! A Way to Monitor Air/Fuel Mixture

Dfishrmn · #1 Fri, February 27th, 2009, 10:15 PM

Is there a way to monitor the air/fuel mixture as a percentage? Maybe in the records area, would fuel and mass air flow monitors give a number that could be calculated? I admit I haven't researched all the record options available but this just occurred to me it may be helpful. I have read in other forums that a ratio of 14:1 is ideal. Is this a stock mixture and our canned/custom tunes are different? I have the same modified stock intake that Jack has and am wondering what the mixture may be and if we are hitting the target area. Just some random thoughts!

twintips_17 · #2 Sat, February 28th, 2009, 12:28 AM

Quote:

Originally Posted by Dfishrmn

Is there a way to monitor the air/fuel mixture as a percentage? Maybe in the records area, would fuel and mass air flow monitors give a number that could be calculated? I admit I haven't researched all the record options available but this just occurred to me it may be helpful. I have read in other forums that a ratio of 14:1 is ideal. Is this a stock mixture and our canned/custom tunes are different? I have the same modified stock intake that Jack has and am wondering what the mixture may be and if we are hitting the target area. Just some random thoughts!

It all depends on where in the throttle you are. If you are all the way into her, then it mixture will actually go down a bit? I can’t remember the numbers I have seen posted, but it’s almost down to 11:1 at WOT.

I could be wrong about the number but it’s something like that.

14:1 is what I understand as the effect ratio for effect burning and fuel mileage. Not for power. That would be to lean for max HP or torque.

Dfishrmn · #3 Sat, February 28th, 2009, 08:48 AM

Quote:

Originally Posted by twintips_17

It all depends on where in the throttle you are. If you are all the way into her, then it mixture will actually go down a bit? I can’t remember the numbers I have seen posted, but it’s almost down to 11:1 at WOT.

I could be wrong about the number but it’s something like that.

14:1 is what I understand as the effect ratio for effect burning and fuel mileage. Not for power. That would be to lean for max HP or torque.

Good info! That's why I was wondering if there is a way to monitor it.

Chris74 · #4 Sat, February 28th, 2009, 11:46 AM

Quote:

Originally Posted by twintips_17

It all depends on where in the throttle you are. If you are all the way into her, then it mixture will actually go down a bit? I can’t remember the numbers I have seen posted, but it’s almost down to 11:1 at WOT.

I could be wrong about the number but it’s something like that.

14:1 is what I understand as the effect ratio for effect burning and fuel mileage. Not for power. That would be to lean for max HP or torque.

^^all depends on the tune........ I believe 14:64.1 is stoich. At WOT somewhere around that 12:0.1 range is nice! I believe 11:8.1 is close to where optimum TQ is achieved and 12:6.1 is optimum for peak HP......I assume this varies slightly from truck to truck / tune to tune though.

Quote:

Good info! That's why I was wondering if there is a way to monitor it.

I don't know of a way to monitor it like what you want but here is another way to measure it besides taking it to a dyno....
http://www.wbo2.com/

Chris74 · #5 Sat, February 28th, 2009, 12:01 PM

Quote:

Originally Posted by Dfishrmn

Is there a way to monitor the air/fuel mixture as a percentage? Maybe in the records area, would fuel and mass air flow monitors give a number that could be calculated? I admit I haven't researched all the record options available but this just occurred to me it may be helpful. I have read in other forums that a ratio of 14:1 is ideal. Is this a stock mixture and our canned/custom tunes are different? I have the same modified stock intake that Jack has and am wondering what the mixture may be and if we are hitting the target area. Just some random thoughts!

The stock, canned and custom tunes will obviously all be different. I will say this......if you have done your job and provided Bill with complete and accurate information to write your custom tunes with.........IMO there is no need for you to worry about measuring this!

I guarantee Bill will have your A/F dialed in to ideal ratios at both cruise and WOT. They will be more ideal than the stock tune!

I have looked at my tunes (actually Bill's

) on a dyno and confirmed this to be the case.......atleast with my truck!

Plain and simple........."BILL KNOWS HIS ****"........AND YOU CAN HAVE 100% peace of mind regarding the quality of his work and the extensive effort he puts into all of our tuning

Dfishrmn · #6 Sat, February 28th, 2009, 06:48 PM

Quote:

Originally Posted by Chris74

The stock, canned and custom tunes will obviously all be different. I will say this......if you have done your job and provided Bill with complete and accurate information to write your custom tunes with.........IMO there is no need for you to worry about measuring this!

I guarantee Bill will have your A/F dialed in to ideal ratios at both cruise and WOT. They will be more ideal than the stock tune!

I have looked at my tunes (actually Bill's

) on a dyno and confirmed this to be the case.......atleast with my truck!

Plain and simple........."BILL KNOWS HIS ****"........AND YOU CAN HAVE 100% peace of mind regarding the quality of his work and the extensive effort he puts into all of our tuning

I have never doubted that. I am just curious.

SinCityFX4 · #7 Sun, March 1st, 2009, 08:19 AM

If I remember correctly...Bill was saying something about there not being a wideband sensor yet??? Jack/Bill/Corey will step in I am sure and chime in.

kokopellimotorsports · #8 Sun, March 1st, 2009, 07:09 PM

At this point there is now way to monitor AFR with the Gryphon. I know you can get stand alone AFR meters from AEM, Innovative Motorsports, and a few others.

Ty

***Power Hungry*** · #9 Mon, March 2nd, 2009, 12:51 AM

Edge has mentioned building a wideband O2 sensor similar to the pyrometer that they use on the diesels. Other than the mention of it, I have no information regarding if or when they plan to release one.

Outside of that, I do plan to add the LT & ST Fuel trims as well as O2 voltage. This would at least provide some measure of monitoring whether or not the engine is lean. Again, I don't have a specific time to include this. It's just a matter of when things free up a little bit.

Take care.

***Jackpine*** · #10 Mon, March 2nd, 2009, 08:52 AM

Quote:

Originally Posted by Power Hungry

Edge has mentioned building a wideband O2 sensor similar to the pyrometer that they use on the diesels. Other than the mention of it, I have no information regarding if or when they plan to release one.

Outside of that, I do plan to add the LT & ST Fuel trims as well as O2 voltage. This would at least provide some measure of monitoring whether or not the engine is lean. Again, I don't have a specific time to include this. It's just a matter of when things free up a little bit.

Take care.

Wow! and having all that, you'd almost have to have the ability to do a rapid switch between screens, wouldn't you, Bill? At least I'd want that so I could see the other things I like to monitor too.

It never ends, does it?

- Jack