rmodel65

do you have the kit with the piston pin in the oil ring land?

roegster

yes, the rings are staggerd and right side up, they are file fit from perfect circle, did everything slowly and propely. a machine shop did the .030 overbore. Yes, the kit is pistons with pin in oil ring lands and a spacer under the oil rings. Yes, I put on 2 PVCbreathers plumbed into vacuum line. Please help, something very wrong. Thanks

woodsy

leakdown is your next step, not a static compression check, an actual leak down, that will tell you if ring seal is the culprit. Pin in the oil ring is irrelevant, the only time thats an issue is if the knucklehead didnt use the rail spacer, seen it may times, but thats not the case here

silver91gt

did you replace the valve seals in the head?

aode08

Drive some more at normal speeds for a week, and pull the plugs to narrow it down and let us know what you found.



But congratson the build!!!!!,we alllove the stroker packages for the 5.0, makes a true 12 second car.

Jfsram

It should be one breather and one PCV valve.

roegster

Thanks for some new ideas, I will try the leak-down test and drive tha car normal for a week. Please keep coming back to this thread down the road.

woodsy

No need to drive it normal, a leakdown will tell you in 10 minutes if the rings are an issue.

roegster

ok ,I'll make up an oldspark to air adaptor and do leak-down test. This test is very fuzzy to me, it's been several years. Do I put theno. 1cylinder on the compressionstroke TDCso the valves are closed? After I do no.1, I turn the engine over by handtill the rotor points to the next terminal on the cap and so on and so on, right? Thanks

mjr46

they make a special tester to do that test and yes the valves have to be closed and follow the firing order around the cap