Dumbo The Flying Elephant

[Larry Hill]

Wow did it feel good to be working on Dumbo. After a season and a half under the hood is just very dirty and dusty. Removing the engine is a must to get clean.

[Larry Hill]

I may have found an occasional miss fire, engine coolant in the spark plug well. I think Dumbo will be quicker hitting on all 16 plugs.

[Larry Hill]

All plugs a little bit oily but not real bad. It so much easier to check valve lash with the engine out

[Rick J]

Originally Posted by Larry Hill

I finally got the stuff made and was able to figure installed height. The kool part is I was instructed to get several different sets of valve locks. The standard, the +.050, the -.050, and the top lock. It moves the installed height around and with the help of shims I will be able to get to my coil bind target number on each spring. I’m hoping to get to size to plus .005” on installation height.

A tip of the Hat to all of the cylinder head folks, it’s not easy just to get the installed height correct, past Tech, and run hard all the way to the Finnish line. The real good cylinder head people are a bargain.

FYI, avoid +.050 locks if you can, if not use 10° locks & retainers.
Reason is locks only clamp on the valve stem below the groove, the ID of the lock is larger above the groove.

[Larry Hill]

Thanks I will check that.
Spoke with someone that had some thoughts on why the head leaked coolant in to the spark plug bore. Coolant casting core flotation. I wonder why it took two seasons of racing to appear on this head an only one season to cause a problem on the odd cylinder head. One of life’s little mysteries.

[Larry Hill]

The down side of doing it yourself, forgetting where I placed a tool because, “I don’t use it that often”. After some time I found it. Just another stupid old man trick.

[Billy Nees]

Larry, look at the bright side! Soon you'll be able to hide your own Easter eggs!

[goinbroke2]

Originally Posted by Larry Hill

The down side of doing it yourself, forgetting where I placed a tool because, “I don’t use it that often”. After some time I found it. Just another stupid old man trick.

Oh that's nothing, wait until you forget how to do the simplest thing...on a video for everyone to see! LOL!!

[Larry Hill]

Dropped the head off at Jeff Taylor Performance. Jeff said that I’m not the first to have the problem. It’s the same end on the same casting number. He made some other recommendations that should help us get a little closer in the HP race.

[Larry Hill]

Today and this weekend we haven’t any granddaughter functions to attend. I should get a lot of things re-verified and cleaned.