T
TheWizzerd
Guest
This is a new 49mm steel sleeve build that I recently posted about the port timings etc. I got it to produce decent power finally, and its running OK.
However, after tearing it down to tweak/finalize the ports, I noticed an odd wash pattern that appears as if the fuel/air charge is simply screaming over the dome and right out the exhaust.
Does that appear to be the case to those who fully understand this?
What is generally the primary cause? My first hunch is the exhaust system not producing the appropriate reverse wave for proper scavenging, and allowing it to simply pump right through.
It appears that the transfers (only one is really visible here) are getting the flow toward the intake. (brown pattern on "left" (lower in pic) side of piston). It appears they may be uneven in their flow as no transfer pattern is visible on the right side, but that may be nothing at this point.
Any help is much appreciated. Thanks!
However, after tearing it down to tweak/finalize the ports, I noticed an odd wash pattern that appears as if the fuel/air charge is simply screaming over the dome and right out the exhaust.
Does that appear to be the case to those who fully understand this?
What is generally the primary cause? My first hunch is the exhaust system not producing the appropriate reverse wave for proper scavenging, and allowing it to simply pump right through.
It appears that the transfers (only one is really visible here) are getting the flow toward the intake. (brown pattern on "left" (lower in pic) side of piston). It appears they may be uneven in their flow as no transfer pattern is visible on the right side, but that may be nothing at this point.
Any help is much appreciated. Thanks!