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FE Power Forums => Non-FE Discussion Forum => Topic started by: 410bruce on September 10, 2025, 08:21:14 AM

Title: Pushrod Length 5.0 Roller Engine
Post by: 410bruce on September 10, 2025, 08:21:14 AM

Hey guys!
Question: How do you all go about measuring for the correct pushrod length with the engine together, with hydraulic roller lifters?
This is a new 347 stroker SBF using AFR Enforcer heads with screw in studs and guide plates running roller rockers.
It's staying together minus the intake and we're not changing a lifter to a solid. Just need to figure this as-is.

Thanks guys! Any help greatly appreciated.  :)

Title: Re: Pushrod Length 5.0 Roller Engine
Post by: WConley on September 10, 2025, 09:17:22 AM

Just get a pushrod length checker tool from somebody like Summit.  Make sure the length range and ball ends are correct for your SBF.

Summit has several like this:  (I don't know if this one is correct for your application)

https://www.summitracing.com/parts/hrs-92129

Once you have the length set up correctly for your lifter preload, measure it and order your pushrods in that length.

Title: Re: Pushrod Length 5.0 Roller Engine
Post by: 410bruce on September 10, 2025, 09:26:00 AM

Thank you WConley. That's how I would have done it but reading other posts and such on the interwebs, I figured I'd have to jump through a bunch of hoops, check it at half lift and so on.
I do have the correct length checker, from Summit.   :)

Thanks again!

Title: Re: Pushrod Length 5.0 Roller Engine
Post by: WConley on September 10, 2025, 09:43:01 AM

Bruce -

I was assuming the rocker geometry is correct.  You should check that before finalizing the pushrod length.  You have adjustable rocker studs, right?  Make sure the roller contact pattern is roughly centered on the valve stem.  Once you've got that checked on a few cylinders, then you should have a good idea where the pushrod length needs to be.