Any Horse Power to be Gained?
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Any Horse Power to be Gained?
Just for example I will use a 500 hp motor at 6000 rpm. Any Hp there to be gained using floater pins or pressed?
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Re: Any Horse Power to be Gained?
A performance gain would come from a pin being lighter for sure , but as I don't think any friction reduction between a pressed pin or floater could be measured on a dyno.
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Re: Any Horse Power to be Gained?
Not sure how floating vs pressed fit effects the pin weight?!?
Any frictional gains would typically only be measured at high rpms.
Any frictional gains would typically only be measured at high rpms.
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Re: Any Horse Power to be Gained?
So If the pins are say 20 grams each lighter could be something there.
Re: Any Horse Power to be Gained?
.0001HP.econo racer wrote: ↑Tue Sep 10, 2019 3:46 pm So If the pins are say 20 grams each lighter could be something there.
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Re: Any Horse Power to be Gained?
Don't forget to add 2-3 grams for the pin-locks again.
A good cold air intake will net more power more easily.
Or a well tuned timing advance curve.
A good cold air intake will net more power more easily.
Or a well tuned timing advance curve.
Re: Any Horse Power to be Gained?
Stand on the scale and weigh yourself, 9 times out of 10 people can afford to shed some weight... Going on a diet and exercising might make a bit more difference than the weight of a piston pin, just saying...
Re: Any Horse Power to be Gained?
it might even make more power with a heavier pin if it made the piston more stable and retain its shape.
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Re: Any Horse Power to be Gained?
Shhhh. Don’t give away all our secrets. Lol. Yep, depending on the piston design and use some times a heavier pin can help keep the piston supported.
Paul
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Re: Any Horse Power to be Gained?
Ok I get it there is nothing to be gained. How did you know I am fat Just 30 lbs.
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Re: Any Horse Power to be Gained?
econo racer wrote: ↑Tue Sep 10, 2019 9:53 am Just for example I will use a 500 hp motor at 6000 rpm. Any Hp there to be gained using floater pins or pressed?
The only gain with floating pins is that you can take them apart a lot easier and faster.
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Re: Any Horse Power to be Gained?
Only disadvantage I see is when the piston rocks with a pressed pin it will not rock as easily due to the roughly double contact area.. could cause more scuff/heat on the skirt.
The higher the rpm the more pronounced that would be... heavier stock pistons make it worse.
Floating it tends to let the pin move in the rod, not the piston
Many times I've seen older builds with forged pRessed TRWs that have badly scuffed skirts .. mostly due too the way to tight pin clearance.
That definitely produces unwanted heat
Opening it up to .0007 to .001 is best
The higher the rpm the more pronounced that would be... heavier stock pistons make it worse.
Floating it tends to let the pin move in the rod, not the piston
Many times I've seen older builds with forged pRessed TRWs that have badly scuffed skirts .. mostly due too the way to tight pin clearance.
That definitely produces unwanted heat
Opening it up to .0007 to .001 is best
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Re: Any Horse Power to be Gained?
I am waiting for the dyno sheets showing that a lighter pin will gain torque and the resulting HP.
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