Brian - nice job.

Mike, No problem, I've been running the repro Horstman mufflers on my dual rear for several seasons, there is still plenty of space for the cooling air to escape. Like everyone else said, the only concern in that photo is the missing 3rd bolt ... some washers, a spacer and a good quality allen bolt ...

Mike, No problem, I've been running the repro Horstman mufflers on my dual rear for several seasons, there is still plenty of space for the cooling air to escape. Like everyone else said, the only concern in that photo is the missing 3rd bolt ... some washers, a spacer and a good quality allen bolt ...

... this is a video I shot while honing the MC8 block I ran at TBO this year ... I thought it would be educational for anyone who is not familiar with what a rigid hone is. A rigid hone is a precision tool which can correct a cylinder to a true round / cylindrical shape, as opposed to a spring type ...

Gary, thanks for the thank-you ... but its hard to compete with guys like you and Scott when you dudes are donating show quality MC6 engines MC6 raffle winner,http://rearenginekarts.com/db_CIMG83891.jpg ...and of course, Rob and Bob put a zillion of hours into planning and execution of this event, f...

here are my photos from last weekend...

Stan, thanks for the link ... we also were wondering how piston rings can be made... I found this webpage, which contains many links to other resources on this topic...

http://modelenginenews.org/techniques/piston_rings.html

Jeff

here is an 18min video, various clips from the entire weekend...

CLICK HERE to watch in Large HD Video mode (requires high speed Internet connection)

Scott, I don't think I have seen one done like that ... maybe that block started out with a gully ported 3rd port? A lot of the 3rd ported motors were boosted by extending each of the 3rd port holes upward, as was done by McCulloch on the MC90 motor: Mc90 Boost Ports-500.jpg Also, many of the 3rd po...

I decided to build a new motor to take to the TBO to play with. The project motor for this week is a MC8. Last night I decided that instead of extending all three 3rd port holes up as boost ports (as the MC90 had) ... that I would try something different. Since I am using a MC91 type piston which ha...