Somender Head Grooving

Lee ODell
Lee ODell Senior Contributor
in HUDSON
I came across this interesting letter from somebody named Rudy.

This head grooving was done to a 232 Iron head, mounted on a 1951 262 high mileage Hudson engine on Feb. 1, 2005

Somender
I just completed the test on the Hudson flat head 6 cyl engine 262 C.I.

The head was milled .030 to true it up and also raise compression up a bit. The head I used is a 232 cyl. head that raises the C.R. up a little. ( don't know how much ) If this head was installed on a 262 or 308 engine and milled .010 or above they will detonate under a slight lug.

The 232 head has your mods. on each chamber and the test is as follows.

FUEL USED----86-87 OCTANE
ELEVATION----3500-4000 FT.
TIMMING--------T.D.C. and 5 degree before, then 10 degree. (eng. would kick-back above this )
OUTSIDE TEMP---70-75 degree.
STOP and GO STARTS ON MOUNTAIN ROADS.

The engine never would never ping under these conditions, even lugging the engine down to 400 R.P.M. It would slowly pull faster.
CUT IN HEAD
From the edge of cyl. bore 0.9415 (started then went just into the slanted part of chamber)
Half way across to slant is 0.060 deep
Just at the edge of the slant is 0.092
The width is 0.180.02
Before the mods were performed, this engine would have a ping-rattle that sounded like the head was cracking into.

The mod. is working just fine, no DEATH-RATTLE of any kind just smoother running.

Later in year we will try it on a 308 C.I. engine (flat-head Hudson ) an see if we get the same.
Thanks for you help. HUDSONLY RUDY



The grove starts at the far edge of flat part of combustion chamber where head gasket edge would be, and gradually gets deeper and wider toward where the combustion chamber begins slopping down. The groove ends slightly down the slop.


Has any Hudson owner tried this method on their car? Was there any noticeable change? Was pinging eliminated?
Lee O'Dell

Comments

This discussion has been closed.

Categories

In this Discussion