FE Power Forums

FE Power Forums => FE Technical Forum => Topic started by: fryedaddy on January 12, 2024, 12:33:32 PM

Title: pushrod length
Post by: fryedaddy on January 12, 2024, 12:33:32 PM

if i change from a hyd flat tappet cam to a hyd roller,does the pushrod length usually change?

Title: Re: pushrod length
Post by: blykins on January 12, 2024, 01:07:20 PM

Always.  Lifters are a lot taller on a roller.

Title: Re: pushrod length
Post by: fryedaddy on January 14, 2024, 01:08:15 PM

so does that mean i need ,roller cam,roller lifters,pushrods,and matching valve springs for the swap,i already have roller rockers

Title: Re: pushrod length
Post by: blykins on January 14, 2024, 01:37:41 PM

Yes and a steel distributor gear.  I'd also recommend a steel thrust plate.

Title: Re: pushrod length
Post by: pbf777 on January 15, 2024, 11:31:13 AM

      Always be sure to converse with the camshaft maker of the "appropriate" distributor drive gear material as there have been different cam-cores made available (read: "off-shore"  ::))which do not present as acceptable to what otherwise might be considered the norm.   ;)

      And beware of those company "tech-guys" that might respond to the inquiry: "Oh, those cams use the O.E.M.'s standard gear"!  If so, follow up with: "So, what's the "standard gear" material to start with"?   ???  Nine times out of ten they won't be able to answer that; and if such proves to be the case, go somewhere else for your cam!   :)

      Scott.

     

Title: Re: pushrod length
Post by: fryedaddy on January 16, 2024, 08:21:49 AM

thanks,im glad you reminded me of the timing gear and thrust plate