Rules Question, Coil Posts

Chipg56

Member
I recently became the owner of a bracket that allows you to change timing on a flathead while running. It is rather thick and will require me to trim the length of the posts so the coil will align with the flywheel magnet. Once I do so, is the block forever destined to be a R+D block? Or would it be legal to make spacers between the block and the coil? Thanks for your input.
 

flattop1

Dawg 89
I know you can only weld one post .
It seems like a discretion call . Technically is a modified post .
Still its in the original position with the original coil .
At the nationals or money races your likely tossed . Saturday at a local show your good .
 

"J'-remy

Member
I recently became the owner of a bracket that allows you to change timing on a flathead while running. It is rather thick and will require me to trim the length of the posts so the coil will align with the flywheel magnet. Once I do so, is the block forever destined to be a R+D block? Or would it be legal to make spacers between the block and the coil? Thanks for your input.
with a wingnut? that thing was designed by George Owensby aka 'rocket man' greatest Limited/open modified flathead builder ever a lot of builders use them testing on the dyno
 

flattop1

Dawg 89
How far offset the mount is .
It might possibly work with
un- modified posts .
Testing in a different block seems like would give different results .
Mr . Carlson might have some input .
I thought i saw where he had used one for testing.
 

CarlsonMotorsports

Site Supporter
I have this set-up on our mule engine for testing various things (cams, pipes, etc.) with varying ignition timing on the dyno. It has come in handy many times tuning with and diagnosing particular coils that like more advance due to higher retard above 4000 rpm. On mine, you have to shorten the ears on the mount/block. It's not just a little bit either - it is very noticeable.

As far as legality -- you cannot move the coil or repair more than 1 ear for that reason....so, I would say that cutting them both short is a nokey dokey. With that said, consider that guys using the newer style BB flywheel are spacing the coils out (not even necessary) and are passing tech -- I suspect a tech man would have to be VERY picky to call this out. If they see that the coil has been positionally moved (clockewise or height from flywheel) then it's a pretty clear call. Good question to which I am not sure how this would be teched today (again, given guys running the flywheels designed to be used with a starter gear.) Technically, it's illegal, but will it be called out, is another story.

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🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com
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765-339-4407
bcarlson@CarlsonMotorsports.com
 

Chipg56

Member
There is an exception in the rule book for the "new flywheels" with the statement that the coil posts must be unmodified from original. As I do not have any desire to cheat or cause controversy, I will only use the fixture on test blocks.
 
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