Pretty in Pink, dunno why
Join Date: Feb 2009
Location: Redondo Beach
It's working fine. The oil loss, which the the biggest reason for doing it, has gone to nil.
I used a common tacky aircraft sealer on the Cometic gasket. It did weep a bit, but seems to have all but stopped. It's not been an issue, but the paper gasket is the way to go. I agree with your assessment, the wee bump in compression is not worth the hassle.
As to the second ring, yes, it was gapped at .028. The rationale is as follows:
"Second rings: Current thinking regarding the end gap on most performance engines is to provide a larger gap on the second ring for best performance. Testing has shown a larger second ring gap tends to increase top ring stability allowing for a better seal. This larger “escape” path prevents inter-ring pressure from building up and lifting the top ring off the pistons allowing combustion pressure to get by. Since the primary function of the second ring is oil control, you can open the gap with no adverse effect on the compression sealing of the ring pack. (There are some applications that don’t benefit from this theory because cylinder pressures are extremely high and the second ring is utilized primarily as a compression ring and not a device for oil control; these would be limited to supercharged/turbo applications.) Many engine builders have reported lower blow-by readings and horsepower gains in the upper RPM ranges with wider second ring gaps."
The KLR is certainly not a performance engine, but one can hope...
With ported heads, large valves, L-Mod, KLX needle, GSXR1000 muffler, and a slightly rich mixture, it provided modest power gains.
Tom [email protected]
“She went out slowly. The way she did it hadn’t been learned at business college.”
'How' are words so important they cannot be too often used.”
Sting like a butterfly.
Last edited by Tom Schmitz; 09-13-2012 at 10:56 AM.