How do these pulls look A/F ratio wise?
10-31-2007, 09:18 PM
#1
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How do these pulls look A/F ratio wise?
It was recorded with a LC-1.. no rpm input but its easy to see where I was flooring it and where I shifted. Bacially, im running 5 to 6 psi, and the a/f ratio never went over 11.8 to 1 under full load. Thats alittle rich right? This is with a vortec riseing rate FPR with a 13 to 1 disc, so Im assumeing at 5 psi manifold pressure, the fuel pump is at full load. I have a bipes and O2 clamp too.
The files are from innovative's logworks 2.. I dont know how to convert the graph into a picture.
Oh, they are all 3rd to 5th gear pulls.
LOOK BELOW FOR PICS
http://files-upload.com/files/591984/345.log
http://files-upload.com/files/591985/45.log
Here are other links incase the top dont work.
http://www.megafileupload.com/en/file/20702/45-log.html
http://www.megafileupload.com/en/fil...3/345-log.html
The files are from innovative's logworks 2.. I dont know how to convert the graph into a picture.
Oh, they are all 3rd to 5th gear pulls.
LOOK BELOW FOR PICS
http://files-upload.com/files/591984/345.log
http://files-upload.com/files/591985/45.log
Here are other links incase the top dont work.
http://www.megafileupload.com/en/file/20702/45-log.html
http://www.megafileupload.com/en/fil...3/345-log.html
Last edited by cardriverx; 10-31-2007 at 09:35 PM.
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10-31-2007, 09:33 PM
#5
Stock fuel pump? If it is, run the car and carefully squeeze your return line completely closed and then read off your max fuel pressure from your fuel pressure gauge. My stock pump started out ok but then quickly lost pressure, the walbro 190hp is $90 and very easy to install, if you haven't already. Generally, 11.8 to 1 is not too rich.
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10-31-2007, 09:54 PM
#14
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A new guy coming in with AFR logs that look good? Hell must have frozen over.
I'd prefer to see the slope of the graph flipped, so it starts at 11.8 and drops down to 11, but I'd be nitpicking then. That looks pretty ******' good for stock pump and an FPR.
I'd prefer to see the slope of the graph flipped, so it starts at 11.8 and drops down to 11, but I'd be nitpicking then. That looks pretty ******' good for stock pump and an FPR.
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10-31-2007, 09:57 PM
#15
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sweet! The only reason I think that it goes up by about .3 points is because sometimes I observe a slight boost creep to 6 - 6.5 ish psi when I hit redline.
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10-31-2007, 10:14 PM
#17
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Yes, it does. It says that he spent a lot of time here asking good questions and his setup is working very nicely for him, even though he's only had it running a week at most. I've seen so many guys come through here, especially in the last couple of months, wondering why they can't run 10psi on a setup designed for 5, or asking how they can crank up the boost without giving any regard to timing or fuel control, and then every so often you get someone who understands limitations and is making certain that their setup is running properly. 
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10-31-2007, 10:39 PM
#19
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And thanks alot guys, I got these a/f ratios without adjusting anything, I put everything on and it ran like a charm! Im so happy I got it right the first time haha. Plus im only 17 so I could not afford a screw up lol.
Oh, and my name is steve =)
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