Don't mean to nitpick here, but the image shown of "particle board" is actually oriented strand board (OSB). Particle board is formed from wood dust and very small chips. OSB's oriented structure usually makes it stronger than particle board. Perhaps it was the script writer's original intention to compare the strengthening of wood by purposefully changing it's internal structure to strengthening metal by doing the same via forging.
Most of the cast pistons today are hypertuectic and fine for street turbo and these higher compression direct injection engines. Forged are more for racing applications. By nature, forged pistons have more tolerance when cold as they expand more than cast when they warm. Coating or not, piston slap will occur every cold start. This will tend to oval the cylinders, shorten the lifespan, make more and larger boring on the rebuild. The choice is yours to make. 😁
Gd am looking alittle advice have a h22a,5100139 that am upgrading should I go forged pistons or should I just go high compression pistons and witch pistons is best for me,will appreciate your experience with ur advice
Just bought a wiesco rebuild kit for my 2001 honda 250ex. I bought it in 01 and havent touched the motor in 21 years. hoping that this kit will bring the power back to my motor.
Pretty sure him explaining the armor Glide was enough for mechanically inclined person to understand. Yes without the armor Glide there will be some slapping prior to it reaching operating temperature
@@andywu8558 All should understand the "Slap" is a ancient issue solved with the modern forgings, many turned shapes and Heat treat process , most if not all are set up with tighter Piston to wall clearance than Cast pistons. and the Hot Rod product has the underside Shot Peened for Stress relief.
That ended in the late seventies, Modern Forging are set as tight or tighter Piston To Cylinder Clearance than OE Castings. Ol LT1 chevy with those boat Anchor TRW forgings sounded like a person was in the motor with a Hammer
I'm doing the ultimate test with Wiseco pistons in my snowmobile this year ! People keep telling me they won't last in your Polaris RMK... Wiseco's can ruin cylinders because they tend to expand slower in your cylinder than cast pistons, which can cause a cold seize... The trick is to let your machine warmed up and proper lubrication... I'll see how many miles I can pull out of these bad boys !
I dont know aboute wiseco but you can put a shity piston as long the engineer do his jod right,now if you putt wiseco or another high quality piston....
the comparison between stock cast piston to the wiseco showed me that the stock one has a better antislap security by the longer guide. wisecos choice is to shorten the guides and add a layer of anti-friction. this is ok but why this anti-friction layer is not applied to the strongest claimed part with de biggest leverage the nose of the guide..?
Not sure what your referring to as "Guides" the Piston Skirts are the same length as stock OE. Modern Four Stroke MXr's have Short Strokes with Long Connecting Rods to straighten out Rod Angles Keeping the Piston Square in the bore for superior ring seal. The piston is merely a ring holder. Loose clearance and the piston will flex across the Pin Bore and crack and split the piston The Coating is Not even factored in the Clearance spec.
Hello how much boost can they handle? If running with h profile rods, Aluminium intercooler and planning to overboost the turbo? Whats the limit? Compression 8:5:1
Racers Choice GP pistons have Longer Piston Skirts than OE to better stabilize the Piston Keeping the Ring more Square up and down the bore Providing Superior Ring Seal.
@@matthewjackson64 I heard what he said but if I didn't know better I would not have noticed the crucial information that is not mentioned intentionally otherwise I would have destroyed an daily driver with pistons that really doesn't benifits my engine
Thys Greeff I’m just being a troll. I’m sorry, I just had a cup of coffee. ☕️ I think you’re right, cast-aluminum is better than forged for a reliable average horsepower daily driver. ✌🏽 ☮️ and ❤️
Mr. Partzilla himself, good to see you still making videos, they've helped me out a lot on my atv. Keep ' em coming and have a great day
Don't mean to nitpick here, but the image shown of "particle board" is actually oriented strand board (OSB). Particle board is formed from wood dust and very small chips.
OSB's oriented structure usually makes it stronger than particle board. Perhaps it was the script writer's original intention to compare the strengthening of wood by purposefully changing it's internal structure to strengthening metal by doing the same via forging.
Most of the cast pistons today are hypertuectic and fine for street turbo and these higher compression direct injection engines. Forged are more for racing applications. By nature, forged pistons have more tolerance when cold as they expand more than cast when they warm. Coating or not, piston slap will occur every cold start. This will tend to oval the cylinders, shorten the lifespan, make more and larger boring on the rebuild. The choice is yours to make. 😁
Gd am looking alittle advice have a h22a,5100139 that am upgrading should I go forged pistons or should I just go high compression pistons and witch pistons is best for me,will appreciate your experience with ur advice
Just bought a wiesco rebuild kit for my 2001 honda 250ex. I bought it in 01 and havent touched the motor in 21 years. hoping that this kit will bring the power back to my motor.
Hi john, you doing really good job🙂🙂🙂
Very Nice & Informative.
Din't Mentiond Piston Slap on Cold (w/forged) but you did mention that it takes longer to heat up.
Pretty sure him explaining the armor Glide was enough for mechanically inclined person to understand. Yes without the armor Glide there will be some slapping prior to it reaching operating temperature
Amsoil should offer instant lubrication.
@@andywu8558 All should understand the "Slap" is a ancient issue solved with the modern forgings, many turned shapes and Heat treat process , most if not all are set up with tighter Piston to wall clearance than Cast pistons. and the Hot Rod product has the underside Shot Peened for Stress relief.
That ended in the late seventies, Modern Forging are set as tight or tighter Piston To Cylinder Clearance than OE Castings.
Ol LT1 chevy with those boat Anchor TRW forgings sounded like a person was in the motor with a Hammer
I'm doing the ultimate test with Wiseco pistons in my snowmobile this year ! People keep telling me they won't last in your Polaris RMK... Wiseco's can ruin cylinders because they tend to expand slower in your cylinder than cast pistons, which can cause a cold seize... The trick is to let your machine warmed up and proper lubrication... I'll see how many miles I can pull out of these bad boys !
I dont know aboute wiseco but you can put a shity piston as long the engineer do his jod right,now if you putt wiseco or another high quality piston....
Define "a little bit more" like at how much hp will I need forged pistons
I got this in my suzuki ltr450 quad..
Witch wiseco piston is best for my h22a 5100139 that I want to upgrade
the comparison between stock cast piston to the wiseco showed me that the stock one has a better antislap security by the longer guide. wisecos choice is to shorten the guides and add a layer of anti-friction. this is ok but why this anti-friction layer is not applied to the strongest claimed part with de biggest leverage the nose of the guide..?
Not sure what your referring to as "Guides" the Piston Skirts are the same length as stock OE. Modern Four Stroke MXr's have Short Strokes with Long Connecting Rods to straighten out Rod Angles Keeping the Piston Square in the bore for superior ring seal.
The piston is merely a ring holder. Loose clearance and the piston will flex across the Pin Bore and crack and split the piston
The Coating is Not even factored in the Clearance spec.
wiseco wise choice!!
Whats your suggestion for a 2007 trx250ex with hmf full exhaust ? Also what size should i put in to get the popping noice to stop when i let off gas ?
Looks like there's a crack in the casting on the left pin reinforcement beam @ 2:34 - doesn't look good for Wiseco
Hello how much boost can they handle? If running with h profile rods, Aluminium intercooler and planning to overboost the turbo? Whats the limit?
Compression 8:5:1
53psi before I blew a hole through my piston
and Hypereutectic ??? best of both worlds
hi i need 62mm piston 14mm pin size forged piston and clyender block
Where are you from
@@m_zbrv3967 i m from pakistan lahore
@@Shamoolovers6691 hmmm not sure about your market. If you live in Malaysia, item like that is very easy to find
@@m_zbrv3967 Lahore pakistan
@@m_zbrv3967 These itemes are not availabel in are markets
With shorter piston then OEM you get more piston rocking tho
Racers Choice GP pistons have Longer Piston Skirts than OE to better stabilize the Piston Keeping the Ring more Square up and down the bore Providing Superior Ring Seal.
Skirt Length is the same as OE, GP racers choice 2t's have Longer skirts than OE
That coating is for cold start to reduce piston slap!
Thys Greeff that’s what he said, pay attention boomer.
@@matthewjackson64 I heard what he said but if I didn't know better I would not have noticed the crucial information that is not mentioned intentionally otherwise I would have destroyed an daily driver with pistons that really doesn't benifits my engine
Thys Greeff I’m just being a troll.
I’m sorry, I just had a cup of coffee. ☕️
I think you’re right, cast-aluminum is better than forged for a reliable average horsepower daily driver.
✌🏽 ☮️ and ❤️
@@matthewjackson64 I don't mind it's cool
Nope. Not even factored in the clearance