5v input source for wideband on Datamaster?
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
5v input source for wideband on Datamaster?
Does anyone know how to input a 5v source into the pcm and log it through datamaster? It may not be possible at all but RUKWKR and I have been debating all day about a way to do it.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
The other method is using an LM-1 and datamaster at the same time those are the only options I know. I don't use it this way, I have usually have it w/the tuning program.
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Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
Hey guys not real sure how interested you all would be in this but what about the voltage pinout? Take the voltage output on the wideband and input on either the fuel pump voltage pin or the ign volt input. At that point you could export to an excel spreadsheet and have the actual AFR in one column, the commanded in another, then just divide for percent error. Come on RUKWKR I know you want to let me try this on your car...
Le Mans Master
Joined: Aug 2000
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From: Australia
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
I've been wanting to do this I just never got around to it. My thread here.. http://forums.corvetteforum.com/c4-t...atamaster.html
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
Rick my only question is how do you convert the voltage once its input into datamaster? Will you have to export it to a spreadsheet and do the formula to convert voltage to AFR? Thats really not that big of a deal but to be able to look over and see the actual AFR would be nice.
Melting Slicks
Joined: Jun 1999
Posts: 2,949
Likes: 23
From: Bowling Green KY
Looks like we'll still have to export to a spreadsheet though.
Instructor
Joined: Aug 2008
Posts: 130
Likes: 2
From: Bowling Green Kentucky
Is the goal to determine the difference between the "less precise" MAF number and the "more precise" wideband number? I could see where knowing the percent error in the MAF would allow you tune based on a corrected number if you did not have access to a wideband. Just wanting to make sure Im reading in to this correctly. RUKWKR, youre my resident expert in all things fast 
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
Are you able to export the custom engine data to a spreadsheet?
Jmoore the basic idea is to be able to see the percentage in error for the MAF. Then you simply scale the MAF table until your AFR is right on. Once it is tune properly using this method you should be able to command an AFR and in all actuality the engine would be at that AFR. This will make tuning the LT1 a lot simpler and more correct than using narrowband 02's
Jmoore the basic idea is to be able to see the percentage in error for the MAF. Then you simply scale the MAF table until your AFR is right on. Once it is tune properly using this method you should be able to command an AFR and in all actuality the engine would be at that AFR. This will make tuning the LT1 a lot simpler and more correct than using narrowband 02's
Melting Slicks
Joined: Jun 1999
Posts: 2,949
Likes: 23
From: Bowling Green KY
Is the goal to determine the difference between the "less precise" MAF number and the "more precise" wideband number? I could see where knowing the percent error in the MAF would allow you tune based on a corrected number if you did not have access to a wideband. Just wanting to make sure Im reading in to this correctly. RUKWKR, youre my resident expert in all things fast
I'm the Luke to his Yoda
fyi his old forum name is misleading, he's the guy with the ridiculous C5 I told you about!