reading plugs
02-04-2010, 09:58 PM
#1
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reading plugs If I am reading the plugs on a non projected tip plug and my timing mark only goes halfway of the ground strap and the fuel ring is good on a 150 shot could I go up to a 220 shot without changing the timing.382 ls1 10.9 comp pump gas in main tank and 117nitrous sunoco in stand alone.wide band at 11-11.3
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02-05-2010, 09:55 PM
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middle of strap before bend. between bend and end not between bend and threads.fuel ring is dark on porcilin about 16th of a inch wide at base after cutting threads off with a saw .dont have pics
02-08-2010, 08:13 PM
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I will take some pics of the plugs after I go to track next tues . I appreciate the advice so far.I threw the old ones away except one and it has been in a bucket of junk now its all dirty so it wouldnt do justice to the way the plug looked when it came out of the motor.
02-17-2010, 07:59 PM
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02-17-2010, 08:18 PM
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If i pulled those plugs out of my car first i would know its to rich. the timming mark is close but the rich condition is probably masking to much timming.
Id pull 5-10% fuel/hp out of the fuel jet and pull 2 degrees for the next pass. What is your jets and fuel pressure? that will give us a better shot at a jet recomendation.
If its the standard 150 shot ~.062 and .032 fuel . Go down on the fuel jet to .030(or .02 from where your at w/60 psi fuel pressure), take 2 degrees out post the new plugs and also et slip for both runs. once you have the plugs right at 150 it is much safer to go up and your jet spread will stay basically the same. if you just go up on the nitrous side to lean it out its going to move the timing to much.
Id pull 5-10% fuel/hp out of the fuel jet and pull 2 degrees for the next pass. What is your jets and fuel pressure? that will give us a better shot at a jet recomendation.
If its the standard 150 shot ~.062 and .032 fuel . Go down on the fuel jet to .030(or .02 from where your at w/60 psi fuel pressure), take 2 degrees out post the new plugs and also et slip for both runs. once you have the plugs right at 150 it is much safer to go up and your jet spread will stay basically the same. if you just go up on the nitrous side to lean it out its going to move the timing to much.
02-17-2010, 08:27 PM
#17
If it were mine i would pull 2 degrees out of it and lean it out a bit. If you are running a low pressure setup then pull 1/4 lb out of it and see if they clean up a little more. They are not "bad" by any means but they could stand to be a little cleaner. Just remember that when you lean it out, pull timing too.
If you have a bunch of jets then you can put a smaller fuel jet in it and accomplish the same thing. Just remember that the smaller the jet, the easier it is to get clogged.
Post up the jetting, timing, and fuel pressure, it will make it easier to give you advice.
02-17-2010, 08:28 PM
#18
If i pulled those plugs out of my car first i would know its to rich. the timming mark is close but the rich condition is probably masking to much timming.
Id pull 5-10% fuel/hp out of the fuel jet and pull 2 degrees for the next pass. What is your jets and fuel pressure? that will give us a better shot at a jet recomendation.
If its the standard 150 shot ~.062 and .032 fuel . Go down on the fuel jet to .030(or .02 from where your at w/60 psi fuel pressure), take 2 degrees out post the new plugs and also et slip for both runs. once you have the plugs right at 150 it is much safer to go up and your jet spread will stay basically the same. if you just go up on the nitrous side to lean it out its going to move the timing to much.
Id pull 5-10% fuel/hp out of the fuel jet and pull 2 degrees for the next pass. What is your jets and fuel pressure? that will give us a better shot at a jet recomendation.
If its the standard 150 shot ~.062 and .032 fuel . Go down on the fuel jet to .030(or .02 from where your at w/60 psi fuel pressure), take 2 degrees out post the new plugs and also et slip for both runs. once you have the plugs right at 150 it is much safer to go up and your jet spread will stay basically the same. if you just go up on the nitrous side to lean it out its going to move the timing to much.