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FE Power Forums => FE Technical Forum => Topic started by: frnkeore on January 10, 2024, 02:29:27 PM

Title: Ford Adjustable Rockers
Post by: frnkeore on January 10, 2024, 02:29:27 PM

What is the highest lift anyone has reliably run with these stock rockers?

Title: Re: Ford Adjustable Rockers
Post by: frnkeore on January 10, 2024, 03:46:15 PM

I'm interested in spring pressures with solid rollers, too.

Title: Re: Ford Adjustable Rockers
Post by: blykins on January 10, 2024, 04:11:55 PM

I have ran factory rockers at .660" lift and 425 lbs of spring load.   That was with a rules road race engine with REM/cryo rockers. 

No way I'd ever associate a factory rocker with a solid roller.   

Title: Re: Ford Adjustable Rockers
Post by: MeanGene on January 10, 2024, 05:49:22 PM

I ran a 296/.660 Delong solid with Isky 8005-A springs many moons ago

Title: Re: Ford Adjustable Rockers
Post by: Rory428 on January 10, 2024, 06:06:51 PM

Like some of the others, I have also ran a solid flat tappet cam with factory adjustable rockers, with over .650" lift. t was an old Comp Cam, I believe the exhaust lift was either .678 or .687" lift. That was in the late 70s-early 80s, wasn`t a lot of alternatives back then.Never hurt a rocker arm but did break a few shafts, no end supports back then.

Title: Re: Ford Adjustable Rockers
Post by: frnkeore on January 10, 2024, 07:33:07 PM

That you, all, I appreciate it.

I've got some Bullet lobes picked out that give a net lift of .688/.704. They are as low as I can get with the duration I want. It's for Jay's TP heads. I'm going to try for 7mm SS valves.

I'm hoping I can use a roller but, I can't afford T&D rockers, that's why I'm asking.

Title: Re: Ford Adjustable Rockers
Post by: MeanGene on January 11, 2024, 10:08:53 AM

The Isky rockers are quite a bit beefier, and have a hardened tip insert