Re: What ended the flathead engine?

Posted by Janicholson on July 22, 2007 at 21:29:41 from (66.173.50.99):

In Reply to: What ended the flathead engine? posted by Sunny 4 acres on July 22, 2007 at 18:52:30:

I'll add some to that said below.
All multi cylinder flatheads (and T heads) have issues with uneven heating of the block due to the exhaust gasses passing through the water jacket. Cracked blocks, and burnt valves were issues. The flow of gasses (now called computational fluid dynamics, and computer simulated pretty well) into a flat head was forced to turn a 180 to get into the cylinder (energy and momentum lost). They also had large surface to volume ratio causing quenching of the burning flame front in the combustion chamber. Thus the unburned fuel caused efficiency (and pollution) problems. Adjusting the valves (on a V8 ford) was painful and often not done in time to save them. Nothing is very exceptional about them except the serious numbers that were produced by almost every maker. GMC was one of the first to abandon the flat head. JimN

Replies:

• Re: What ended the flathead engine? Gene Davis (Ga.) 19:45:37 07/23/07 (1)
  • Re: What ended the flathead engine? Janicholson 08:58:08 07/26/07 (0)

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