D9tE piston Comp Ht

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D9tE piston Comp Ht

Post  STR-LGL-70 on October 31st 2014, 11:20 am

Anyone know if the truck pistons have a different pin height from a passenger car piston?
Pulled the heads off of my mock up engine that has truck rods & piston in it and I have about .050 deck ht. clearance w/ an uncut DIVE-8016-A2 block.
Thanks, Sheldon
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Re: D9tE piston Comp Ht

Post  IDT-572 on October 31st 2014, 12:37 pm

E7TE piston is 1.750 .040 in the hole on a 10.32 deck F3TE piston is 1.770 .020 in the hole @ 10.320 deck.
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Re: D9tE piston Comp Ht

Post  rmcomprandy on October 31st 2014, 8:01 pm

STR-LGL-70 wrote:Anyone know if the truck pistons have a different pin height from a passenger car piston?
Pulled the heads off of my mock up engine that has truck rods & piston in it and I have about .050 deck ht. clearance w/ an uncut DIVE-8016-A2 block.
Thanks, Sheldon

I don't think there ever was a 1979 passenger car 460 engine. As far as I am aware, 1978 was the last year of a 460 passenger car..

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Re: D9tE piston Comp Ht

Post  crittersf1 on November 1st 2014, 7:59 am

That's true Randy. 1978 was the last year it was used in a car.
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Re: D9tE piston Comp Ht

Post  STR-LGL-70 on November 1st 2014, 2:33 pm

I probably should have worded this differently, it was more directed to a typical 460 passenger car piston(D3 to D8) pin location compared to the 460 truck piston pin location from a D9 engine if there is any difference between them.
 I was just surprised at how far below deck these were and didn't measure the actual deck clearance during assembly; I was primarily concerned with having enough piston to valve clearance so I could use what I had on hand at the time.
Probably a good part of why the car felt soft off of the line.
Sheldon
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Re: D9tE piston Comp Ht

Post  rmcomprandy on November 1st 2014, 6:00 pm

STR-LGL-70 wrote:I probably should have worded this differently, it was more directed to a typical 460 passenger car piston(D3 to D8) pin location compared to the 460 truck piston pin location from a D9 engine if there is any difference between them.
 I was just surprised at how far below deck these were and didn't measure the actual deck clearance during assembly; I was primarily concerned with having enough piston to valve clearance so I could use what I had on hand at the time.
Probably a good part of why the car felt soft off of the line.
Sheldon

From the notes i have:
68 to 78 a USA passenger car piston has a 1.752" compression height however, has .240" deep oblong dish.
73 to 87 light duty truck engines and 75 & 76 medium duty trucks use the same piston.
88 to 93 light duty truck pistons have a compression height of 1.752" but, have a .065" deep oblong dish.
93 to 97 light duty truck engines have a 1.772" compression but, have a .189" deep oblong dish and use a metric ring pack.

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Re: D9tE piston Comp Ht

Post  STR-LGL-70 on November 9th 2014, 6:47 pm

Thanks Randy,
The pistons I had have the huge dish in them plus roughly .050 below deck. I think I read somewhere that these are dished 32cc, does this sound right?
Sheldon
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Re: D9tE piston Comp Ht

Post  Paul Kane on November 9th 2014, 7:15 pm

STR-LGL-70 wrote:Thanks Randy,
The pistons I had have the huge dish in them plus roughly .050 below deck. I think I read somewhere that these are dished 32cc, does this sound right?
Sheldon
1973-1987: 21cc
1988-1992: 7cc
1993-1997: 16cc

Dish volumes noted above are approximate.
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Re: D9tE piston Comp Ht

Post  kim on November 9th 2014, 7:47 pm

Paul Kane wrote:
STR-LGL-70 wrote:Thanks Randy,
The pistons I had have the huge dish in them plus roughly .050 below deck. I think I read somewhere that these are dished 32cc, does this sound right?
Sheldon
1973-1987: 21cc
1988-1992: 7cc
1993-1997: 16cc

Dish volumes noted above are approximate.


As are fords assembly practices.... If the deck didn't clean up at 10.3 10.1 is good... or less...

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