The Ford Barn

32Bee · 06-26-2018, 03:20 PM

Is it possible to use domed heads on a flathead that has flat top pistons? If
so what problem(s) may be created in doing so?

JSeery · 06-26-2018, 03:23 PM

Low compression.

petehoovie · 06-26-2018, 03:24 PM

I would say lower compression....

Seth Swoboda · 06-26-2018, 04:10 PM

I just corrected this situation on a 1935 Ford that a friend bought. Lower compression as the other fellas have said.

pooch · 06-26-2018, 05:25 PM

Mine is the other way around.

Domed pistons with early flat top piston heads.

Am running 2 head gaskets ATM, until one day when it needs to be overhauled.

Pete · 06-26-2018, 05:43 PM

Sponsored Links (Register now to hide all advertisements)

You can get more compression with flat top pistons and the proper heads.
Cheap go fast.

32Bee · 06-26-2018, 06:09 PM

Thanks everyone for your responses.

Peter

Talkwrench · 06-26-2018, 07:21 PM

Quote:

Originally Posted by Pete

You can get more compression with flat top pistons and the proper heads.
Cheap go fast.

Spill the secret Pete...

Pete · 06-26-2018, 09:40 PM

Quote:

Originally Posted by Talkwrench

Spill the secret Pete...

It is no secret. It is just a matter of Boyle's laws of physics.
When you compress a gas into a container (combustion chamber), the smaller the container, the higher the pressure for a given amount of input energy.

Two mating flat surfaces have less area than two mating curve surfaces for the same diameter.

06-26-2018, 03:20 PM	#1
32Bee Senior Member Join Date: May 2010 Location: Stratham, NH Posts: 233	Domed Engine Heads Is it possible to use domed heads on a flathead that has flat top pistons? If so what problem(s) may be created in doing so?

06-26-2018, 03:23 PM	#2
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: Domed Engine Heads Low compression.

06-26-2018, 03:24 PM	#3
petehoovie Senior Member Join Date: May 2015 Posts: 8,078	Re: Domed Engine Heads I would say lower compression.... __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0

06-26-2018, 04:10 PM	#4
Seth Swoboda Senior Member Join Date: May 2010 Location: Southern Illinois Posts: 3,787	Re: Domed Engine Heads I just corrected this situation on a 1935 Ford that a friend bought. Lower compression as the other fellas have said.

06-26-2018, 05:25 PM	#5
pooch Senior Member Join Date: Sep 2010 Location: South Coast NSW Australia Posts: 2,596	Re: Domed Engine Heads Mine is the other way around. Domed pistons with early flat top piston heads. Am running 2 head gaskets ATM, until one day when it needs to be overhauled.

06-26-2018, 05:43 PM	#6
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,407	Re: Domed Engine Heads Sponsored Links (Register now to hide all advertisements) You can get more compression with flat top pistons and the proper heads. Cheap go fast.

06-26-2018, 06:09 PM	#7
32Bee Senior Member Join Date: May 2010 Location: Stratham, NH Posts: 233	Re: Domed Engine Heads Thanks everyone for your responses. Peter