3800 got my 42.5# injectors in and went tuning with min

[superchargedgp]

i had to drop my mini afc to 86% to get the car to stay running at idle with 42.5# injectors. than went tuning droped my o2's to 910's at WOT and holy shit does it move. IPW were at 17 much better than 23 with my stock injectors. now i'm off to go belt shopping and gonna put on 2.7 on it.

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[rob]

Big difference huh? What or how were your LT's responding at idle and mid-top end? Also, it may not be a bad idea to get a baseline on your timming before you toss the 2.7 on.

 

[Mike K]

Is it running rich at idle though? I am close to static with the stock injectors, but I don't want the problems typically associated with larger injectors.

 

[superchargedgp]

yes there is a different curve in those injectors they run fat at low end and lean out at top

 

[rob]

Originally posted by Mike K@Sep 5 2004, 11:25 PM
Is it running rich at idle though? I am close to static with the stock injectors, but I don't want the problems typically associated with larger injectors.

I believe you can have you PCM custom burned with fuel grafs...I believe this would be the best way to go. Mini A/F's are ok; for big squirters they are (too me) a temporary solution untill you can address the PCM.

 

[Mike K]

Originally posted by rob+Sep 6 2004, 12:26 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (rob @ Sep 6 2004, 12:26 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Mike K@Sep 5 2004, 11:25 PM
Is it running rich at idle though?  I am close to static with the stock injectors, but I don't want the problems typically associated with larger injectors.

I believe you can have you PCM custom burned with fuel grafs...I believe this would be the best way to go. Mini A/F's are ok; for big squirters they are (too me) a temporary solution untill you can address the PCM. [/b][/quote]
Rob, this was my thought. Compensating for fuel injectors via a modified MAF table scares me a little. I'm sure that DHP tuner will suit me well. What I'm most concerned about is how "leaky" these are at idle.

Do you plan on tuning them anymore Mike or is this as dialed in as you are going to get?

 

[rob]

Originally posted by Mike K@Sep 6 2004, 12:28 PM

Rob, this was my thought. Compensating for fuel injectors via a modified MAF table scares me a little. I'm sure that DHP tuner will suit me well. What I'm most concerned about is how "leaky" these are at idle.

You said that before Mike. So the larger pinicals dont perform well at idle. Its alot of fuel being passed per opening. I got the 60# Delphis. You can look at it this way. It is an uncommonly large injector. I guess I can live with the rich idle as long as it performs well at speed.

I also OHMed those Delphis and compared them to the stock impeadence. I was surprised to see the resistance was the same...12.4-12.5. I thought I was going too see 14-16 on the delphi's...So I think they are going to perform well once tunned in.

Remember Ron's post.