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Author Topic: Ford Adjustable Rockers  (Read 654 times)

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frnkeore

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Ford Adjustable Rockers
« on: January 10, 2024, 02:29:27 PM »
What is the highest lift anyone has reliably run with these stock rockers?
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Frank

frnkeore

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Re: Ford Adjustable Rockers
« Reply #1 on: January 10, 2024, 03:46:15 PM »
I'm interested in spring pressures with solid rollers, too.
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Frank

blykins

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Re: Ford Adjustable Rockers
« Reply #2 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.   
« Last Edit: January 10, 2024, 04:19:00 PM by blykins »
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MeanGene

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Re: Ford Adjustable Rockers
« Reply #3 on: January 10, 2024, 05:49:22 PM »
I ran a 296/.660 Delong solid with Isky 8005-A springs many moons ago
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Rory428

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Re: Ford Adjustable Rockers
« Reply #4 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.
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1978 Fairmont,FE 427 with 428 crank, 4 speed Jerico best of 9.972@132.54MPH 1.29 60 foot
1985 Mustang HB 331 SB Ford, 4 speed Jerico, best of 10.29@128 MPH 1.40 60 foot.
1974 F350 race car hauler 390 NP435 4 speed
1959 Ford Meteor 2 dr sedan. 428 Cobra Jet, 4 speed Toploader. 12.54@ 108 MPH

frnkeore

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Re: Ford Adjustable Rockers
« Reply #5 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.
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Frank

MeanGene

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Re: Ford Adjustable Rockers
« Reply #6 on: January 11, 2024, 10:08:53 AM »
The Isky rockers are quite a bit beefier, and have a hardened tip insert
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