Low Head versus High Head

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Dennis_Brown
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Joined: Wed Jan 09, 2019 10:14 pm
First Name: Dennis
Last Name: Brown
* REQUIRED* Type and Year of Model Ts owned: 1926 Roadster pickup
Location: Spring Hill Fl
MTFCA Number: 21458

Low Head versus High Head

Post by Dennis_Brown » Wed Feb 03, 2021 10:39 pm

If a low head was installed on a later engine that came with a high head I was wondering what anyone experienced when it was tried?
1- I know compression ratio increased.
2- You had poorer circulation thru the low head thereby increasing heat in the cooling system.
3- Was there an increase in horsepower?
4- Did it affect fuel consumption ?
5- I assume it would be harder to crank by hand, what about with a starter?
6- With a 26-27 engine you would possibly have to modify the fan mounting or go to an older style.
Just kicking thins over in my head and wondering what would happen.
Thanks


Kerry
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First Name: Frank
Last Name: van Ekeren
* REQUIRED* Type and Year of Model Ts owned: 1916 touring, 1916 pick-up, 1924 coupe, 1926 touring, 1927 touring
Location: Rosedale Vic Australia

Re: Low Head versus High Head

Post by Kerry » Thu Feb 04, 2021 12:26 am

I've never noticed any difference, if there was it would put a demand on low heads but the only demand on low heads is for the T to be period correct if fitted with the wrong one.

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TRDxB2
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* REQUIRED* Type and Year of Model Ts owned: Speedster (1919 w 1926)
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Board Member Since: 2018

Re: Low Head versus High Head

Post by TRDxB2 » Thu Feb 04, 2021 12:14 pm

The past is a great place and I don't want to erase it or to regret it, but I don't want to be its prisoner either.
Mick Jagger


Norman Kling
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Location: Alpine California

Re: Low Head versus High Head

Post by Norman Kling » Sat Feb 06, 2021 5:07 pm

My 22 came with a low head and a 3-1 rear axle when I got it. It goes faster on level and downhill, however, need to use Ruckstell more often on hills or even starting out on a slight hill. The car has a low radiator and still doesn't overheat.
Norm

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