Crack85
Active member
What is everyone's thoughts on running forged pistons in a daily driver? I keep hear different sides to the story. Please provide your reasoning with whatever response/ side you choose.
Forged pistons?
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Morgan@Midwest Diesel & Auto
New member
Forged pistons will not last as long as cast. Cast will not hold as much power as forged.
Forged pistons have a looser wall clearance. So with a cold engine (less than 90*f) you do not want to rev it up to 3k right after you start the engine. Most people don't do that anyway.
Raw forged aluminum pistons do not last as long as hard anodized forged pistons. The hard anodizing makes the surface abrasion resistance much higher. By coating the entire piston, rings and skirts last much longer than standard forged pistons.
Are forged for everyone? No.
Are they good for a competition or hard street/strip machine that doesn't get driven 100k a year? Yes.
Are they available in any oversize and combination available? Yes.
Are Hd pistons available in oversize's? No.
Are they good for higher hp? Yes.
Will they last 100k @ 1000hp? Probably not.
Will they last 100k @ 500hp? Probably.
The thing you need to ask yourself is, do you want power? Or do you want 100k miles? I don't care who you are, your not going to get 100k out of a 800-1000hp pickup truck engine. Something will break even if the bottom end held up. So you need to ask what your goals are.
I sell hard anodized forged, machined and coated cast ford and HD pistons.
Hopefully this helps others that didn't know the ups and downs of each.
Forged pistons have a looser wall clearance. So with a cold engine (less than 90*f) you do not want to rev it up to 3k right after you start the engine. Most people don't do that anyway.
Raw forged aluminum pistons do not last as long as hard anodized forged pistons. The hard anodizing makes the surface abrasion resistance much higher. By coating the entire piston, rings and skirts last much longer than standard forged pistons.
Are forged for everyone? No.
Are they good for a competition or hard street/strip machine that doesn't get driven 100k a year? Yes.
Are they available in any oversize and combination available? Yes.
Are Hd pistons available in oversize's? No.
Are they good for higher hp? Yes.
Will they last 100k @ 1000hp? Probably not.
Will they last 100k @ 500hp? Probably.
The thing you need to ask yourself is, do you want power? Or do you want 100k miles? I don't care who you are, your not going to get 100k out of a 800-1000hp pickup truck engine. Something will break even if the bottom end held up. So you need to ask what your goals are.
I sell hard anodized forged, machined and coated cast ford and HD pistons.
Hopefully this helps others that didn't know the ups and downs of each.
BOSS450
New member
The forged pistons are niceeeee. Ask me how I know
Oil Field Trash
New member
Are HD pistons just the IH pistons?
NathannialD
New member
looser piston to wall clearance than cast depends on the material..
the reason they wont last as long in a dd application is either you use a soft top ring to save the ring lands which will cause rapid ring wear or you use a hard ring that will last longer but will beat up the ring lands.
the reason they wont last as long in a dd application is either you use a soft top ring to save the ring lands which will cause rapid ring wear or you use a hard ring that will last longer but will beat up the ring lands.
Powerstroked162
On Da Juice
Not always. Some shops call machined and coated stock pistons "HD pistons". There was a time when it referred strictly to international pistons. I think if you aren't buying from shops like Midwest, Elite, Haller's, etc., you should ask the person on the other end of the phone, where they come from
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Crack85
Active member
Keep the info coming guys.
twisted stroke
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So what would be a good guess on how long forged will last ???
twisted stroke
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Pistons
White_monster
Active member
100k miles if warm up procedures are followed.
NathannialD
New member
What data do you have to back up this claim, I have never heard of forged setups lasting half that many miles.
bigred13
New member
White_monster
Active member
Just so I do t have to spend hours digging all the info up I'll retract my statement.
From what I have found on dirt bikes snowmobiles ect you need to be care full that the engine warms up nice before you hammer on it or your going to get cold scoring from the piston expanding took fast. I assume the same applies here.
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White_monster
Active member
Sure does.
Morgan@Midwest Diesel & Auto
New member
Do you have any experience with hard anodized forged pistons?
Fwiw there's a duramax out there with 60k + miles on the same style hard anodized pistons that we offer for 6.4's. The same principals work for any engine, duramax, powerstroke, cummins.
They are not a get in it and go piston. But they are an alternative for high HP, nitrous, ect.......
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i think he was speaking in general.
Morgan@Midwest Diesel & Auto
New member
Not trying to be a dick
HD F250
Active member
I wish I would have considered forged earlier....hmmmm.
Oil Field Trash
New member
Oh OK. What kind of abuse will the IH pistons take? Reason I ask, I can get a good deal on IH pistons but I just wanna make sure they are gonna take what I throw at them. Prolly 850hp will be the most it will see.
