will straight pips blow my motor
#11
Join Date: Feb 2006
Location:
Posts: 820

ORIGINAL: tommyd
Most of the motors have had things done to them. Aside from my grandpas truck which is an unknown. I beleive it to have mild headwork done to it but he bought it like that and hasn't really done much but change the oil. My 4.3 has just an intake and the exhaust on it. Though I still have the stock cat which is (if I am correct) the main source for back pressure and shouldn't be a big issue if you still retain SOME back pressure. What kind of mech. failures are we talking here?
Most of the motors have had things done to them. Aside from my grandpas truck which is an unknown. I beleive it to have mild headwork done to it but he bought it like that and hasn't really done much but change the oil. My 4.3 has just an intake and the exhaust on it. Though I still have the stock cat which is (if I am correct) the main source for back pressure and shouldn't be a big issue if you still retain SOME back pressure. What kind of mech. failures are we talking here?
#12
Yes, I have also hear of burnt exhaust valves with decreased backpressure.
#13
Join Date: May 2006
Location:
Posts: 218

Thanks for the info. We don't have any sort of inspections here but I planned on leaving the cat any how since it's still illegal to drive on the road with out one. I'm pretty sure my cat is toast anyhow seeing as how I was averaging 22MPG on the highway and now I'm averaging 16.
#14
Join Date: Feb 2006
Location:
Posts: 820

ORIGINAL: tommyd
Thanks for the info. We don't have any sort of inspections here but I planned on leaving the cat any how since it's still illegal to drive on the road with out one. I'm pretty sure my cat is toast anyhow seeing as how I was averaging 22MPG on the highway and now I'm averaging 16.
Thanks for the info. We don't have any sort of inspections here but I planned on leaving the cat any how since it's still illegal to drive on the road with out one. I'm pretty sure my cat is toast anyhow seeing as how I was averaging 22MPG on the highway and now I'm averaging 16.
If your cat is toast, that might be the decrease in mileage due to it being clogged, or broken and blocking the flow.
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