robp823 Posted April 27, 2013 Share Posted April 27, 2013 Does anyone know the compresion spec for this engine? Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 28, 2013 Share Posted April 28, 2013 IH/Ford do not publish compression specs. What's your altitude? The CR is the same as a 6.0, 18:1. A strong engine at sea level should make 400-425. I use 375+ as good in Cleveland, 350 being yellow and 300 red. Quote Link to comment Share on other sites More sharing options...
robp823 Posted April 28, 2013 Author Share Posted April 28, 2013 Im not sure of my altitude.Im in NEPA.Thank you though. Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 28, 2013 Share Posted April 28, 2013 North East, Pennsylvania. Elevation 883FT http://www.wunderground.com/weather-forecast/US/PA/North_East.html Quote Link to comment Share on other sites More sharing options...
robp823 Posted April 28, 2013 Author Share Posted April 28, 2013 So what would be a good compression ratio at that elevation.Just ran compression test. Cyl 2 318psi Cyl 4 350psi Cyl 6 320psi Cyl 1 320psi Cyl 3 300psi Cyl 5 305psi Customer complaint,"Has to start with starting fluid every morning" no matter what ambient air temp is. Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 28, 2013 Share Posted April 28, 2013 The elevation of Cleveland is 689FT. Being fairly close to your elevation, I would say at 300psi, you're likely into some RED Quote Link to comment Share on other sites More sharing options...
robp823 Posted April 28, 2013 Author Share Posted April 28, 2013 yes i agree Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 28, 2013 Share Posted April 28, 2013 Obviously his engine is tired, but check glow plug amperage anyway. IH uses a dumb system that does not set codes when the relay or GP fail. Cold amperage on a VT275 should be 135 initially, tapering off to 80-90 after 20 seconds. High resistance and v drop across the relay are common on IH trucks. (Ford guys have been spoiled by the GPM since they came out a decade ago) If the GP and injectors are good, I'd think that engine should start on its own. I see ether needed when the compression pressures are lower than yours, like a bunch in the 200's. If GPA is good, fill the secondary FF with Stanadyne when it's parked, run it 20 seconds to circulate it, and shut it off for the night. That might ID bad injector atomization..... Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 28, 2013 Share Posted April 28, 2013 Getting any smoke during crank if you don't fog it with ether? Quote Link to comment Share on other sites More sharing options...
robp823 Posted April 29, 2013 Author Share Posted April 29, 2013 No lots of white smoke Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted April 29, 2013 Share Posted April 29, 2013 Getting any smoke during crank?No lots of white smoke Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted April 29, 2013 Share Posted April 29, 2013 If that means there's a lot of white smoke during cranking you have fuel but no fire. Check the GPA. If it's good it might be injectors. Quote Link to comment Share on other sites More sharing options...
robp823 Posted April 29, 2013 Author Share Posted April 29, 2013 will update after suggested testing. Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 29, 2013 Share Posted April 29, 2013 That being said though, the compression is still a little weak in my opinion... How many hours/miles on this whip? Quote Link to comment Share on other sites More sharing options...
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