Cylinder Getting Hot

Discussion in 'PSI Superchargers Tech Questions' started by Flyboy68, May 21, 2012.

  1. Flyboy68

    Flyboy68 Member

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    KB526, 1471 35%, BAE fuel heads, bruno/lenco 2 sp, promag 44, 1/8th mile. Over the weekend we had #3 cylinder start getting hot 3.3 seconds into the run, went all the way up to 1241. The spark plug ground strap was broke off and half of the porcelain was missing down in the plug. Put a new plug in, changed jet from a 48 to a 52, next pass it started to climb again at 2.5 seconds but didn't get as hot, only went to 1108. However we burned up 2nd gear on that pass and it was on the limiter (9200)...wondering if we would've made 2nd and loaded the motor if that cylinder would've went a lot highter? All other egts were fine at 1000-1080. Any ideas what would be going on?
     
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    Flyboy68, May 21, 2012
  2. Mike Canter

    Mike Canter Top Dragster
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    Yes it would have gotten hotter. The reason the groundstrap was gone and the porcelein was broken was because it went into severe detonation on that previous run. if it was running OK before then the port nozzle jet just didn't change size something did change in the fuel system. If all the other cylinders are running at the same EGTs then I would suspect the rubber hose from the distributation block to the nozzle has come apart inside and is blocking the flow. Either way you should really run a leakdown on that motor and if it was me I would pull the head and piston. Have you looked at the rod bearing for that cylinder?
     
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    Mike Canter, May 21, 2012
  3. Flyboy68

    Flyboy68 Member

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    Mike, we wondered if it was a port line so we swapped it with the one on the other side. However we didn't get to run due to a oil leak after the burnout. Probably a blessing. Haven't checked the brg or leaked it yet. The nozzle jet wasn't blocked that we could see when we changed it. Is there a way to see if the port line is bad? Or do you just change them periodically?

    Josh
     
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    Flyboy68, May 21, 2012
  4. Mike Canter

    Mike Canter Top Dragster
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    You can try blowing high pressure air through it in the direction of fuel flow and see what happens. How old are those lines? Yes after that kind of detonation it was a blessing you didn't get to run it again.
     
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    Mike Canter, May 21, 2012
  5. Flyboy68

    Flyboy68 Member

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    Not sure, atleast 4 yrs old. Only ran the car 2 of those 4 yrs.
     
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    Flyboy68, May 21, 2012
  6. Mike Canter

    Mike Canter Top Dragster
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    Thats old especially if they sat around with methanol or WD40 in them even if the car was not used. Maybe time to replace them. I was going to suggest replacing them one a year or every two years but four years, wow.
     
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    Mike Canter, May 21, 2012
  7. Flyboy68

    Flyboy68 Member

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    I wondered....we'll get some lines on it. thanks Mike. I need a checklist of everything that needs bought every year or so...lol

    Josh
     
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    Flyboy68, May 21, 2012
  8. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    lines

    I know someone who makes some killer injector lines....
     
    #8
    Will Hanna, May 21, 2012
  9. Tony Bolt

    Tony Bolt New Member

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    Will or Mike, Is it a need to used the 4AN line with the 3AN fitting like the one you (Will) sell or is the 3AN line ok to use? Speaking of injector & port lines.
     
    #9
    Tony Bolt, May 21, 2012
  10. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    lines

    The conventional rubber lines use a brass -3 fitting that has a big enough orifice that it is not a flow restriction up to about a 77-80 nozzle (depending on system pressure).

    We use a brake line to make our Goodridge injector line kits. The insert that the fitting crimps over to the line is the bottle neck on this type of line, so we made a line that uses -4 line and fitting with a -3 nut to fit the standard fuel injection nozzles.

    Our lines are a lot more durable and flexible and you don't have to worry about the rubber coming apart after a few years. With stainless fittings and our 'carbon' look line covering, they look way cooler too. It's a much better investment.
     
    #10
    Will Hanna, May 21, 2012

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