R16 Pushrod Length (Ford Lifters) - Check?

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Daryl Smith
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R16 Pushrod Length (Ford Lifters) - Check?

Post by Daryl Smith »

Stock Pushrod shows 7.83" length
Isky D-013 Pushrod shows 7.687" length
Racing Prep Manual says cut .250" from stock pushrod (with cut head) or 7.58"

I was expecting a pushrod length close to the Isky D-013, measuring it with an adjustable pushrod (Comp 7709-1) I am getting 7.493"

Thanks,
Daryl
Last edited by Daryl Smith on Tue Jul 25, 2023 1:58 am, edited 1 time in total.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by Daryl Smith »

Irrelephant
Last edited by Daryl Smith on Tue Jul 25, 2023 1:57 am, edited 2 times in total.
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zippy67roadster
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by zippy67roadster »

I run Isky shortened ones that go with the Ford lifters in my #13 FP 1600 racecar.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by fj20spl311 »

I wounder if the rocker is designed to run off center just a little. I remember something about that causing the valve to spin that keeps it clean.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by 23yrRebuild »

fj20spl311 wrote: Thu May 11, 2023 4:02 pm I wounder if the rocker is designed to run off center just a little. I remember something about that causing the valve to spin that keeps it clean.
I believe it's the lifters that are caused to rotate, by the angle of the wipe areas of the cam lobes....I could be wrong...
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david premo
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by david premo »

That’s correct the lifter has to rotate or the cam will go flat and the lifters will become dished on the rubbing surface as it continues to wipe in the same spot.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by Daryl Smith »

Irrelephant
Last edited by Daryl Smith on Tue Jul 25, 2023 1:55 am, edited 1 time in total.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by Andrew Griffith »

Do you have the supplier for the roller rocker ?
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by fj20spl311 »

For Sure the lifters have to rotate, but I heard the valves are also designed to rotate.
That is why the keepers are designed to fit loose on the valve and tight in the valve retainer.
I Don't know?
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by Gregs672000 »

There are videos taken inside an engine with high speed cameras that show the valves rotating. Pretty cool stuff.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by Daryl Smith »

Irrelephant
Last edited by Daryl Smith on Tue Jul 25, 2023 1:55 am, edited 1 time in total.
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Re: R16 Pushrod Length (Ford Lifters) - Check?

Post by Daryl Smith »

Irrelephant