[WANTED] 440 pistons
- Thread starter oldkimmer
- Start date
-
I have a dozen sets of 440 Pistons = many new sets.
I will check the compression deck. You are running
1/2 stroker?
If I have them they will not cost you much at all!
I will check the compression deck. You are running
1/2 stroker?
If I have them they will not cost you much at all!
My crank is 4.25 stroke. Rods are 6.8 .990 pins and Chevy size big end. Piston cd is 1.774 13-1 with a 75cc head and .040 gasket. I would like to get down to right around 11-1
Last edited:
I will try to remeasure mine.
Maybe I made a mistake = I had two
23 month old Grandkids with me.
I am confused:
A 1/2 inch stroker with a 1.5 Comp. deck
would be about Zero deck with a 7.1 Rod
according to what I calculated in a 440 block.
Can someone check my math and help me out?
Maybe I made a mistake = I had two
23 month old Grandkids with me.
I am confused:
A 1/2 inch stroker with a 1.5 Comp. deck
would be about Zero deck with a 7.1 Rod
according to what I calculated in a 440 block.
Can someone check my math and help me out?
No, a 4.5 stroke and 1.340 cd is very close to zero deck with a 7.100 rod. A 4.25 crank and a 1.5 cd is pretty much 0 deck. I could also be wrong. Kim
A 4.25 and a 1.5 CD is near Zero with a 7.1 Rod was what I calculated
with 7.1 rod? I run stock length rods which are about .340 shorter therefore
1.68 to 1.7 = I think.
I will remeasure them again this week,
with 7.1 rod? I run stock length rods which are about .340 shorter therefore
1.68 to 1.7 = I think.
I will remeasure them again this week,
I measured Wrist pin hole to top of flat of piston top and then added 1/2 of pin diameter
1.09 divided by 1/2 =.545.
Am I doing this right???
I had written on top of the box the bore and stroke of the engine they were
in and deck height. I do not remember how much I cut off the deck of block as
it was years ago but I know I cut some off it.
1.09 divided by 1/2 =.545.
Am I doing this right???
I had written on top of the box the bore and stroke of the engine they were
in and deck height. I do not remember how much I cut off the deck of block as
it was years ago but I know I cut some off it.
10.725" 440 Deck Height
-7.100" Rod Length
-2.125" 1/2 the stroke on 4.25"
__________________________
1.500" Compression Height
Tom
-7.100" Rod Length
-2.125" 1/2 the stroke on 4.25"
__________________________
1.500" Compression Height
Tom
On my engine I ran Hemi length custom rods
I will remeasure everything in a day or two.
I wrote on top of box 440 with 1/2 inch stroke
I cut the deck some but i do not remember how much.
The Hemi rods are about .100 Longer ( I do not remember anymore )?
I will remeasure everything in a day or two.
I wrote on top of box 440 with 1/2 inch stroke
I cut the deck some but i do not remember how much.
The Hemi rods are about .100 Longer ( I do not remember anymore )?
33IMP
Well-Known Member
Kim, what does your 1.774 piston look like? Flattop, dish, or what? if a flat top, maybe a dish could be machined in, or take a slice off part of the piston head, and leave the quench side of the piston alone.
If it's a dome (it would have to be a small one) machine the dome off.
If it's a dome (it would have to be a small one) machine the dome off.
I’ll find a pic. I think .040 could be machined off safely. First 3 pics are the pistons that came in my 543 kit. 1.34 cd and a 26.7 cc dish. The next pics are the 505 pistons. 1.774 cd. I got my .040 from measuring the 543 piston thickness of the dish. The 505 pistons are .040 thicker if that make sense to u. Kim
Last edited:
The 505 piston tops are roughed up cause the old man that was gonna ceramic coat the tops. Sadly he passed away b4 he could do the ceramic coating. I got these from his son. Kim
That answers that question then. A stock Hemi rod is 6.86" long, but uses a 1.031" wrist pin.
So you had custom 6.86" long Hemi rods with a 1.094" 440 size wrist pin in them.
10.725" 440 Deck Height
-6.86" Rod Length
-2.125" 1/2 the stroke on 4.25"
__________________________
1.74"
-1.685 440 pistons John has
__________________________
.055" in the hole, so John must have cut the block .055" to get it to a Zero deck height.
Tom
-
