Quote:
Originally Posted by GregWeld
Everyone wants to have a hero engine, but don't believe all the hype you hear about 2 percent leakage engines. No cylinder seals perfectly, especially if the engine is nitroused, supercharged, or turbocharged where the top and second rings are set with wide ring endgaps. Even for normally aspirated engines, respectable leakage numbers would be anywhere from 8 to 12 percent with a variation between cylinders of 4 to 5 percent, but it's possible the variation could be as high as 10 percent.
So if you test an engine and see leakage numbers even in the 15 to 20 percent range, this is not cause for alarm
Read more: http://www.carcraft.com/techarticles...#ixzz1RW3bDAVS |
I was just quoting my personal experience; never had an engine I built with those kind of leakdowns, even when new and un-fired. If you're not worried about it that's all that matters.