Cracked Piston thread

Morgan@Midwest Diesel & Auto · Jan 8, 2013

jdgleason said:
Both are available. However, the forged pistons are only available with rods. The international pistons you are talking about are still cast.

Makes sense now

Matt · Jan 8, 2013

How come there isn't a version for standard rods?

forcefed6.4ford · Jan 8, 2013

I would suspect pin placement

jdgleason · Jan 8, 2013

Matt said:
How come there isn't a version for standard rods?

forcefed6.4ford said:
I would suspect pin placement

Design is a touch different. Different wrist pin.

STROKIN N STYLE · Jan 8, 2013

All these cracked piston threads are scaring me. And from the sounds of it, it doesn't matter if I run on 300hd or 125. Time will tell I guess. If it breaks, she'll be down for a while

duddy · Jan 8, 2013

STROKIN N STYLE said:
All these cracked piston threads are scaring me. And from the sounds of it, it doesn't matter if I run on 300hd or 125. Time will tell I guess. If it breaks, she'll be down for a while

Agreed man.

78f100 · Jan 8, 2013

I have one in hole 7 starting to crack, but not at the bowl. Its down low on the flat surface, I will try to get some pics soon.

Wemoy1 · Jan 8, 2013

forcefed6.4ford said:
If you haven't blown a piston you're not trying hard enough LOL

couldnt agre more ill keep that on the dl for right now its in pieces

B585Ford · Jan 9, 2013

I believe I read the bowls are a little larger on the IH pistons. Does that mean that we could run a little more timing (1-2 degrees) and slightly lengthen the PW (by about a 0.1)? I think also read they drop the compression ratio slightly...would that cause any starting difficulties in cold weather?

Danny26 · Jan 9, 2013

B585Ford said:
I believe I read the bowls are a little larger on the IH pistons. Does that mean that we could run a little more timing (1-2 degrees) and slightly lengthen the PW (by about a 0.1)? I think also read they drop the compression ratio slightly...would that cause any starting difficulties in cold weather?

Good question, curious to know as well...

Wemoy1 · Jan 9, 2013

:whs:

Dzchey21 · Jan 9, 2013

Yes your should be able to run a little.more timing with a ih piston 2 degrees more is about all I would run.

The compression ratio drop is pretty much a non issue it only drops it about a half point. I had a Vid posted up of my regular cab starting in 30 degree weather no problem.

As for an update to that I.started it last week with only a single battery in it @ 14 degrees, it did struggle a bit to turn over but it started (after not starting for 2 weeks)
Once running it was pretty rough but it wasn't smoking like I have a cold cylinder, I think sitting for so long is.messing with something, eventually the thing smoothed out after about 30 seconds and still just had a haze of blue smoke. No contribution codes Ect. And this was with 100% over nozzles. I'm confident if I drove it more it wouldn't do that but it rarely gets started or driven this time of year.

The truck also has a slight lifter tick when first started so maybe the issue is a lifter I don't know. But at any rate the compression drop isn't really a problem.

jdgleason · Jan 9, 2013

B585Ford said:
I believe I read the bowls are a little larger on the IH pistons. Does that mean that we could run a little more timing (1-2 degrees) and slightly lengthen the PW (by about a 0.1)? I think also read they drop the compression ratio slightly...would that cause any starting difficulties in cold weather?

Danny26 said:
Good question, curious to know as well...

Dzchey21 said:
Yes your should be able to run a little.more timing with a ih piston 2 degrees more is about all I would run.

The compression ratio drop is pretty much a non issue it only drops it about a half point. I had a Vid posted up of my regular cab starting in 30 degree weather no problem.

As for an update to that I.started it last week with only a single battery in it @ 14 degrees, it did struggle a bit to turn over but it started (after not starting for 2 weeks)
Once running it was pretty rough but it wasn't smoking like I have a cold cylinder, I think sitting for so long is.messing with something, eventually the thing smoothed out after about 30 seconds and still just had a haze of blue smoke. No contribution codes Ect. And this was with 100% over nozzles. I'm confident if I drove it more it wouldn't do that but it rarely gets started or driven this time of year.

The truck also has a slight lifter tick when first started so maybe the issue is a lifter I don't know. But at any rate the compression drop isn't really a problem.

:whs:

The compression change is from 17.2:1 (stock) and 16.5:1 (IH). It shouldn't be a big difference in difficulty of cold starts, but it may haze a touch more at first. I would think that gapless rings may even help with that issue in the cold. Again, just my thoughts.

Morgan@Midwest Diesel & Auto · Jan 9, 2013

I've never had any starting problems with IH pistons. 20 deg and not using glow plugs it fires right off. That is with stock nozzles.

NathannialD · Jan 9, 2013

Matt said:
How come there isn't a version for standard rods?

we had these done quite some time ago to go with different motor options, we can do them for standard rods but there would be over a 2 month lead time for production. most dont want to wait so long

Strokin6.4 · Jan 9, 2013

Cold start with the IH pistons and single. Cant tell a difference.
https://www.youtube.com/watch?v=s81iR58yJB8&feature=youtube_gdata_player

Sent from my SCH-I535 using Tapatalk 2

STROKIN N STYLE · Jan 9, 2013

Good lord they're so loud with a single lol

Matt · Jan 9, 2013

delong_1 said:
we had these done quite some time ago to go with different motor options, we can do them for standard rods but there would be over a 2 month lead time for production. most dont want to wait so long

Wish I would have known. Any idea on pricing for a set with standard length rods?

Spatel23 · Jan 9, 2013

I've always been under the assumption that forged pistons were not ideal in a daily driven diesel.
Anybody care to elaborate on why they are or aren't?

Nathan?

HD F250 · Jan 9, 2013

I've always been under the assumption that forged pistons were not ideal in a daily driven diesel.
Anybody care to elaborate on why they are or aren't?

Nathan?

This is from Tadd when I asked the same question. I know he doesn't have much time so I will post his response to me.

"The HD pistons are not forged. They are a cast design. They are pretty much the strongest option for a daily driven truck. The reason being that the factory style pistons have a steel insert in the top ring position to be reliable for a long service life. Typically pistons just have an aluminum groove for each ring but with the high pressures diesels see the ring groove wears out so they use a steel insert. That is the limitation with forged pistons as there is no good way to do a steel insert so you have to run an aluminum ring groove. Over time it will wear out."