[SEL] OT tractor engine question....

[bill at antique-engines.com]

Odd question:
VERY old and very early tractor, or other engines for that matter - some
designs seemed to integrate the intake "system" into the head casting - ie
no seperate intake manifold to bolt on. The passages were cast into the
head.
Who used that, when, and why?
I know some cars in the 50's did that, early 60's too, I believe.
Who was doing that first?
Did the tractor makers often preceed auto makers on advance designs?
What is the advantage to an integral intake rather than a "bolt on".
Is it heated quicker or more effeciently by the warming of the engine?
I'd think the exhaust on an external design would do that better.....

Bill
Runnells.
The hammer has dropped - the cold is here. 70 -> 40 in under 3 hours