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Old 06-21-2002, 06:56 PM
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Red face Small Block pushrod length?

Here's a good one for ya, got a 350 chev its crate Goodwrench motor. Just fitted 282 cam hyd lifters & new chain, i've pulled the rocker studs & fitted screw-in studs with guide plates also using Harland Sharp roller rockers & stock length hardened pushrods to go with the guide plates.....now here's my problem the pushrods appear to be approx 3/4" too short & can't find any reference to this at all. Looks like the new roller rockers sit much higher up with the new taller stud position therefore requiring longer pushrods, or does the stud boss need lowering to lower the actual stud height??
Its been another late night in the workshop & its now 3am here in England so off to bed thinkin about my small block!! funny i'll be thinkin about something else when get up?
Any help with the push rods would be helpful! thanks.

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Old 06-22-2002, 03:29 AM
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Did the rocker arm manufacturer say anything about milling to fit the arms properly?

Regardless, you are going to have to check your new valvetrain geometry with an checking pushrod-adjustible with a weak vave spring(s) (intake and exhaust) to ascertain that you have correct rocker arm/valve stem tip contact throughout the valve lift sequence.

You will then have to buy (or build) custom length push rods.

[ June 22, 2002: Message edited by: KULTULZ ]</p>
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Old 06-22-2002, 06:46 PM
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thanks for reply, i think the roller rocker manufacturer assumes std press in studs are used therefor no head mods! but with the screw in studs & guide plates the whole assy sits too high giving incorrect roller tip to valve geometry; remedy is to mill the stud boss lower & as you say calculate correct operation of the rocker tip on the valve. But as usual any excuse for new toys & big dent in the Mrs bank account, just driven 500 miles & seven hours later i'm now the proud owner of a lovely pair of Dart Pro 1s.
That'll sort it!! thanks again.
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