New Pushrods for Modded 302
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5th Wheeling
Joined: Jul 2022
Posts: 45
Likes: 3
From: Oklahoma City
New Pushrods for Modded 302
All,
here’s a Question for those that have upgraded their 302 engines -
ive got a set of Edelbrock E street heads ready to install on my NA 1984 F150 302W.
plus - a Comp Cams Extreme Energy hydraulic flat tappet cam.
the rockers haven’t been purchased yet and neither have the hardened steel pushrods.
Question- simply - How do I determine the pushrod length I need?
I am thinking I’ll need to install the rockers and the camshaft and then use an adjustable pushrod to get the proper length measured and THEN order the appropriate length hardened steel pushrod set.
i think the stock pushrod length for the stock configuration is 6.900 inch but I seriously doubt stock length pushrods, although they’d probably work, certainly wouldn’t be the best choice
thanks!!
here’s a Question for those that have upgraded their 302 engines -
ive got a set of Edelbrock E street heads ready to install on my NA 1984 F150 302W.
plus - a Comp Cams Extreme Energy hydraulic flat tappet cam.
the rockers haven’t been purchased yet and neither have the hardened steel pushrods.
Question- simply - How do I determine the pushrod length I need?
I am thinking I’ll need to install the rockers and the camshaft and then use an adjustable pushrod to get the proper length measured and THEN order the appropriate length hardened steel pushrod set.
i think the stock pushrod length for the stock configuration is 6.900 inch but I seriously doubt stock length pushrods, although they’d probably work, certainly wouldn’t be the best choice
thanks!!
Moderator
Joined: Jan 2001
Posts: 57,027
Likes: 2,762
From: Virginia
Your new heads will have guide plates and adjustable rocker arms correct? So the length is not as critical, since you now have a adjustable valve train. So long as the geometry is close. When the valve is open you want the rocker to be close to center on the valve tip.
I would call edelbrock if in doubt.
I would call edelbrock if in doubt.
Thread Starter
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5th Wheeling
Joined: Jul 2022
Posts: 45
Likes: 3
From: Oklahoma City
Your new heads will have guide plates and adjustable rocker arms correct? So the length is not as critical, since you now have a adjustable valve train. So long as the geometry is close. When the valve is open you want the rocker to be close to center on the valve tip.
I would call edelbrock if in doubt.
I would call edelbrock if in doubt.
Cargo Master
Joined: Jan 2004
Posts: 3,118
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From: South Dakota
Laughing Gas
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From: Sanford, NC
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5th Wheeling
Joined: Jul 2022
Posts: 45
Likes: 3
From: Oklahoma City
Pushrod length
Your new heads will have guide plates and adjustable rocker arms correct? So the length is not as critical, since you now have a adjustable valve train. So long as the geometry is close. When the valve is open you want the rocker to be close to center on the valve tip.
I would call edelbrock if in doubt.
I would call edelbrock if in doubt.
thank you
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5th Wheeling
Joined: Jul 2022
Posts: 45
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From: Oklahoma City
Gasket selection is simple (you’re definately not going to use the same type OEM head gaskets) but like every other mechanical assembly, surface preparation is critical as is replacement of those 40 year old head bolts (that have gone through thousands of heat cycles) with new, quality fasteners and proper torque techniques and values.
Moderator
Joined: Jan 2001
Posts: 57,027
Likes: 2,762
From: Virginia
Stock length would be a place to start, but with all that aftermarket stuff put together you still need to eyeball the geometry when it's all put together. If you use roller rockers, you do not want the back of the rocker where the pushrod goes kicked way up in the air, and the roller half-way off the valve tip. The other extreme would be the pushrod end being very short, and again the roller end would be way over to the side of the valve tip. You would think these people would have their act together and try to stay somewhat close to what the factory had as far as length, but things happen sometimes. Blocks get milled, valve tips get ground, heads get decked, etc.
Hotshot
Joined: Jun 2015
Posts: 12,900
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So why start with stock length and then eyeball it to make sure everything is sitting where it should? Why not use an adjustable pushrod checker on an intake and an exhaust valve to actually make the pushrod the necessary length and then order the correct part from the start?
Moderator
Joined: Jan 2001
Posts: 57,027
Likes: 2,762
From: Virginia
So why start with stock length and then eyeball it to make sure everything is sitting where it should? Why not use an adjustable pushrod checker on an intake and an exhaust valve to actually make the pushrod the necessary length and then order the correct part from the start?
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