Larry Widmer's "Soft head" swirl technology

[Barrett Flowers]

I have tried a bit of that from time to time, and not had any success as
far as performance goes, although we did see a slight gain in fuel
mileage on a Mustang we tried it on, but it seemed to run a bit rich at
WOT. There just seems to be too much restriction in that kind of system
to make any real difference. By the time you open things up enough so it
can breath properly, then you loose your bottom end punch (torque), and
seems to run out on the top end. I gave up on it as I am sure that if
there was anything to it, some of the aftermarket head companies would
have them out and pushing them hard.  Personaly I still like the
"golf-ball" approach(i.e.-dimpling the ports to smooth out the air flow
and keep the gas in suspention better).

diy_efi at efi332.eng.ohio-state.edu wrote:
> 
> Has anybody tried the techniques and theories of high swirl air
> into combustion champer (by the way of porting techniques and
> piston chamber design?  Larry is suppose to have achived BSFC's
> below .400, exhaust temps 1000F and even lower while maintaining
> power output because these motors are much more efficient.
> 
> I know lot of very knowledgable people are on the list.  If you
> guys know who Larry is...  email is fine.
> 
> How many of you weld up combustion chambers/ports to reshape them?
> 
> --
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-- 

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