Piston and Head ?

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Piston and Head ?

Post  EVE on August 3rd 2016, 7:02 pm

I have a older set of Diamond dome pistons. Will they work with the newer TFS A460's or only with the old A heads? Wasn't sure if the chamber had been changed or not.

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Re: Piston and Head ?

Post  dfree383 on August 3rd 2016, 7:15 pm

Odds are The chambers are different, but depending on the dome the sometimes can work with minimal rework. It also depends on how much you're heads are cut or what's been done to the chambers
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Re: Piston and Head ?

Post  EVE on August 3rd 2016, 7:44 pm

The heads will be brand new. I have the card from Diamond but there is no date, may have to call them back tomorrow. They don't look like the newer ones either. There is a raised portion in front of the exhaust valve and a recess for the spark plug.

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Re: Piston and Head ?

Post  EVE on August 3rd 2016, 7:49 pm


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Re: Piston and Head ?

Post  cool40 on August 3rd 2016, 9:01 pm

You could probably cut that raised portion off and they would work. Best to clay it and see. study
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Re: Piston and Head ?

Post  EVE on August 3rd 2016, 9:24 pm

Just trying to figure it out before I buy a new set of heads. Here's the plan so far.

Already have:

A-460 block
4.5" 4340 crank
6.7" rods
Titan oil pump
Custom pan
Distributor
7al3 box
Mandrel drive
Motor plates
Etc.

Here's what I need still
A460 top end
A460 tunnel ram
Enderle Bird catcher
Pistons come out to 15.5 to 1 with 85cc chambers
Will more then likely spray it with a 200 shit this year. A 10-71 will probably end up on it after that.

The simplest way to describe what this is going in is to imagine a monster truck, bred with a Ultra4 car.

I have a different name on here, but am Ultimatehellhound on the other forum. Played in the diesel world for a little while and am switching back now.

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Re: Piston and Head ?

Post  cool40 on August 3rd 2016, 11:04 pm

Why not go 10-71 now and be done with it?
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Re: Piston and Head ?

Post  Frank Merkl on August 4th 2016, 3:00 am

chuck the pistons in the lathe and take .300" of the dome and balance from there !
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Re: Piston and Head ?

Post  Lem Evans on August 4th 2016, 11:03 am

EVE wrote:I have a older set of Diamond dome pistons. Will they work with the newer TFS A460's or only with the old A heads? Wasn't sure if the chamber had been changed or not.

They should work if the new heads have the 87cc chambers and not the goofy ass 83 or 85cc chambers.

The dome for the 83/85 stuff will require a different foot print.

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