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Old Dec 24, 2013 | 08:57 PM
  #271  
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You still on the single 255 Walbro?
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Old Dec 24, 2013 | 09:02 PM
  #272  
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Originally Posted by 1969x11
You still on the single 255 Walbro?
Yea I am.
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Old Dec 24, 2013 | 09:08 PM
  #273  
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im commanding 18* i was looking at my last log and it was only showing 15.5*

160kpa showing on the scanner

i need to fix my pinion angle, because im getting some bad vibrations at hard acceleration and it showing up as knock
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Old Dec 24, 2013 | 09:26 PM
  #274  
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Originally Posted by oakley6575
How much boost and timing are you running right now? I'd imagine that my set up should easily be able to handle 15* of timing at 10.5lbs. I'd like to up the boost too but I know I'm on the edge of my fuel pump right now. I have only done pulls halfway through 2nd gear and haven't seen it go lean but I'm sure the pump wouldn't be able to keep up if I ran it down

13.5-14 psi with 14* timing

It seems conservative, but it's also a 10.5:1 motor. I really need to get that second 450 in and turn he boost up rather than jacking the timing up. I'm also on the limits of the 2 bar MAP as I've seen peaks up to about 205 kPa. Want to get a 2.5 bar from Gadgetized.
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Old Dec 24, 2013 | 09:30 PM
  #275  
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Yea if I remember right, I'm sitting right at 9.4scr. So I know I'm waaaay to conservative at 13 degrees of timing, especially on E85. I just bumped it up to 15* and will take a drive here in a sec.
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Old Dec 24, 2013 | 10:07 PM
  #276  
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I didn't get any knock at 15* and it pulled really well. I actually lowered the boost under 10psi, set spark at 15* and it still blew the tires off through first gear, and pulled really hard through most of second. I will up it to 16* and probably stop there for now. E85 is the ****
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Old Dec 24, 2013 | 10:44 PM
  #277  
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Look at my fuel injector flow thread in the full section, it will tell you where you are in terms of injectors and pumps. Be careful about too low of timing, egts will go way up, i melted a turbine wheel that way.
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Old Dec 24, 2013 | 10:56 PM
  #278  
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I have it up at 16* right now. I just bounced it off the rev limiter a few times like an idiot. The road had dirt on it and I just kept thinking it was going to hook. Never did. So hopefully it didn't hurt anything.
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Old Dec 24, 2013 | 11:13 PM
  #279  
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it won't, when you hit the limiter it cuts all fuel so it never goes "lean" it's just air sitting In the cylinder
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Old Dec 24, 2013 | 11:35 PM
  #280  
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I wasn't worried about it going lean, I just hope I didn't hurt anything in the valvetrain. It seemed noisier than normal but I'm sure it was just paranoia
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