Introducing the new Cox International "Xtreme" engine

[quote="Kim"]

Cox International wrote:Thanks Kim and #13 is on the way to you

"And as he said it, so it was" !!!! Thanks Bernie !!!

[quote="Kim"]

Kim wrote:

Cox International wrote:Thanks Kim and #13 is on the way to you

"And as he said it, so it was" !!!! Thanks Bernie !!!

And Bernie said "let there Be Cox" and there was cox!

Now the question of... Will you run it?

microflitedude wrote:Now the question of... Will you run it?

DUDE !!!!!!!!!! What do YOU think ????!!!!!!

Kim wrote:

microflitedude wrote:Now the question of... Will you run it?

DUDE !!!!!!!!!! What do YOU think ????!!!!!!

I'm thinking yes.

microflitedude wrote:

Kim wrote:

microflitedude wrote:Now the question of... Will you run it?

DUDE !!!!!!!!!! What do YOU think ????!!!!!!

I'm thinking yes.

Well, OK then !!!

The only reason it's not getting it's break-in right now is that I got to go get an "Old-Guy" check-up about my sissy shoulder!

They tolerated my disassembly of engines in the waiting room last month, but I somehow figure that a screaming RACING ENGINE just MIGHT be pushing it a bit too far...

Also, you should be getting your 5-40 hardware today or tomorrow!

I didn't get mine yet

Dang customs......

Jason_WI wrote:I didn't get mine yet

Dang customs......

Ok I spoke too soon.

Three tanks of fuel (25% Sig) for break-in with a Cox 5-3 Gray, then I let'r rip! Good needle valve response/settling. Haven't experimented with the head shims yet.

Cox International wrote:Can you run it with only 2 shims and a Cox 5x3 black prop - just for the fun of it?

Will Do...

Its possible that it is still over compressed with just 3 head shims. Maybe got to 5 and see what it does.

Jason

Kim wrote:

Cox International wrote:Can you run it with only 2 shims and a Cox 5x3 black prop - just for the fun of it?

Will Do...

Hey Bernie...I'm thinking it may still need some run time. It went up over 18 then surged a bit back and forth. I was losing my light, and so used a flashlight to run the tach, which tended to register all over the place. I'll try it again in daylight tomorrow!

Jason_WI wrote:Its possible that it is still over compressed with just 3 head shims. Maybe got to 5 and see what it does.

Jason

Will do Jason ! Missed your post last night as I was running in and out of the house. Gonna do it this afternoon with 5 shims and back to two also.

OK...HERE we go!

I packed 5 head gaskets into Ole #13, which brought it's average RPM to a pretty steady 17000. I then ran a couple tanks each as I progressively removed gaskets until I got it down to one.

With one gasket, on 25% Sig, it surge back and forth across 19000. I also thought to balance the 5-3 prop...it was a bit out...and this may have helped also.

As usual, I'm pressed for time with other things, and will have to get back to it to see if more run time helps. May also squirt some 35% in the wild dog to see what happens.

Methinks I'm fixing to void my warranty!!!!!!

Kim,

Why not try taking an APC 5.7 X 3 and cutting it down to 5". I bet that little engine picks up at least 1500 RPM. The fast turners don't like that wide heavy prop.

No matter what RPM it makes it looks fast doing it.

Bob

fit90 wrote:Kim,

Why not try taking an APC 5.7 X 3 and cutting it down to 5". I bet that little engine picks up at least 1500 RPM. The fast turners don't like that wide heavy prop.

No matter what RPM it makes it looks fast doing it.

Bob

I'll see if I've got one in my inventory (I keep the APC's locked in a cage to prevent them from bullying the other props), and give it a shot. I think the Cox 5-3's DO give an across-the-board RPM comparison of these little engines though.

I'm going to start another thread though, sorry I got carried away and hijacked Bernie's post....

You mean Bernie provides warranty Kim?
Right where's that N2O.............?

how many are still available?

52 left out of the 100.

Cox International wrote:52 left out of the 100.

Oh, jeez! I better hurry up and get one. I'll work on that when I gt back home tomorrow.

Poof.....gone!

Jason_WI wrote:Poof.....gone!

Huh??? There are still 52 available...