550 injectors installed, sputtering problem

['89beretta]

I just installed 550s, and now the car bucks and sputters once I hit full boost. It definetly doesn't feel as fast as with the 450s. I'm assuming this is because I don't have an AFC to compensate for the larger injectors and I'm running really rich. Logger shows O2 at .96 vs. .92 on the stockers.

I just need reassurance that it's a tuning issue now and not improper installation. Thanks for your help.

 

[1glaserturbo]

[QUOTE='89beretta]I just installed 550s, and now the car bucks and sputters once I hit full boost. It definetly doesn't feel as fast as with the 450s. I'm assuming this is because I don't have an AFC to compensate for the larger injectors and I'm running really rich. Logger shows O2 at .96 vs. .92 on the stockers.

I just need reassurance that it's a tuning issue now and not improper installation. Thanks for your help.[/QUOTE]


Here, this is what you should do. Take the 550's out, and put the 450's back in UNTIL you have an AFC and a datalogger! Your running rich and getting rich knock. You'll wash out the rings and will screw yourself in the end. Sooooo, do what I said and you won't regret it.

 

['89beretta]

That's what I was planning on doing.

My logs showed nothing out of the ordinary other than higher O2 readings. Have to wait for the next paycheck to get the AFC.

 

[andymoraitis]

Higher O2 readings mean you're running rich. As the poster above mentioned, yank 'em and wait until you have proper fuel control.

 

['89beretta]

Thanks dudes. I'm sure I'll have a question or two about tuning with the S-AFC when that arrives.

 

[kraka]

Ya, without an SAFC, your idle and cruise/low throttle driving will suck too, because of the uncompensated extra fuel you will be running horribly rich and your gas mileage will suffer

 

[larsrya8]

1G Upgrade Path.

Read.

 

[oldman]

That's too funny.