Re: Q's abt the "Blue Mouser" entry...

Sent: Tuesday, January 17, 2012 6:47 PM
Subject: Q's abt the "Blue Mouser" entry...

Mark,
Q1) Why is your Blue Mouse tach race entry captioned as "ported"? What's different about yours?

Q2) Did you seriously lose 4000 (four-THOUSAND) RPM just by removing one (1) head shim?!?!

Paul Wescott
Buena Park, CA


Hi Paul,

I'm going to forward this to the group(s) as some might find it interesting...These two engines ran in 2009, then set in a box until this years race (minus last minute removal of one gasket each) so they're one of the engines that were in both contests. Although I'm not really sure what it tells us, as temps, props, nitro and compression were all different, other then maybe: "Nitro is our friend" and "IF IT AIN'T BROKE DON'T FIX IT!"
The Blue Mouser, Kim just named it that, as the backplate is ported to hopefully help increase air flow.

Red Unlimited
2009 w/ APC 4.75x4 prop & 35% nitro: 19800
2011 with Cox 5X3 prop and 25% nitro: 18500

This is probably mainly due to lower nitro, as most of the engines ran in the mid to upper 18k area. Hopefully Paul G. can comment as he knows what the ideal head gasket set up would be for a Cox #1702 head. Props load is probably close as the Cox 5x3 is a great prop, but it's considered kind of a 'club' load wise compared to the APC even though it was a smaller pitch.

Blue Mouser
2009 w/ APC 4.75x4 prop & 35% nitro 18900
2011 with Cox 5X3 prop and 25% nitro 14000

Part of the fun of this event is it’s a 'proxy' event, that means no pit work! The CD takes the engine, fires it up and takes RPM reading, no fiddling with engines. I'm not really sure what happened to the mouser, it could of been several things, so over compressed that Kim could just not get a needle, or maybe not so much over compressed as possible a chunk of sludge in venturi? I'll have to get it home and tear it down.

Mark