This is topic Who has ran gt40/gt40p heads with stock explorer valvesprings with HO cam? in forum Tech Talk at Northern California Ford Owners .
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Posted by 9165pt0 (Member # 7625) on
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I hear the stock explorer valve springs are the same as, or a tad worse than stock e7 valve springs. But who here has actually ran them with a stock ho cam? Do they hold up to 5200rpm?
Let me know, Im sure theres atleast a few on here that slapped on the heads without doing anything to them.
Posted by SIC9250 (Member # 8216) on
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I've ran a trick flow stage 1 cam on those heads stock valve springs,never had an issue valve train wise,until a rod let go lol
Posted by SLOW95GTS (Member # 10365) on
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The only problem with the springs is that they arent meant to run up to 5200-6250 rpm, if i were you id just buy the Alex springs for 100 bucks and be safe on it. I would hate to take iron heads on and more than once.
Posted by Duncan Motors (Member # 7045) on
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rumurs are no more than 480 lift, some say 514 lift, ive ran a e cam with 1.7s before with no problems, but i was stupid, dont run performnce stuff on 30 year old spring period.
Posted by 9165pt0 (Member # 7625) on
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ok thanks for info guys
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