660 springs too big for cam?
06-23-2012, 02:02 PM
#1
660 springs too big for cam? Got a good deal on a set of heads that have patriot gold extreme 660's on them. My question is, I only plan on running a 228r cam are those high lift springs gonna be too much pressure for only .588/.588 lift? Any help would be great. I know its good to have some extra room but is that too much. Thanks
06-23-2012, 03:26 PM
#2
Got a good deal on a set of heads that have patriot gold extreme 660's on them. My question is, I only plan on running a 228r cam are those high lift springs gonna be too much pressure for only .588/.588 lift? Any help would be great. I know its good to have some extra room but is that too much. Thanks
06-23-2012, 03:34 PM
#3
not enough to hurt anything...
more is better until you start to crush the lobes... you have a while before that happens...
no disadvantages to running a spring with higher pressure and extra room before coil bind...
and they will typically last longer as well which means less maintainence
over time, as springs wear out, they get weaker..
as an example.....
so if you have 400lbs of seat pressure and you need a minimum of 300, then all is good...even if it drops to 350 over the course or 20,000 miles..its still good enough for your setup
06-23-2012, 03:38 PM
#4
^^^
not enough to hurt anything...
more is better until you start to crush the lobes... you have a while before that happens...
no disadvantages to running a spring with higher pressure and extra room before coil bind...
and they will typically last longer as well which means less maintainence
over time, as springs wear out, they get weaker..
as an example.....
so if you have 400lbs of seat pressure and you need a minimum of 300, then all is good...even if it drops to 350 over the course or 20,000 miles..its still good enough for your setup
not enough to hurt anything...
more is better until you start to crush the lobes... you have a while before that happens...
no disadvantages to running a spring with higher pressure and extra room before coil bind...
and they will typically last longer as well which means less maintainence
over time, as springs wear out, they get weaker..
as an example.....
so if you have 400lbs of seat pressure and you need a minimum of 300, then all is good...even if it drops to 350 over the course or 20,000 miles..its still good enough for your setup
06-23-2012, 03:44 PM
#5
Patriot Gold Extreme .660" max lift (Spring Pressure Closed: 155 lbs. @ 1.800" Spring Pressure Open: 410 lbs. @ 1.140")
hell the PRC Springs...
PRC EHT .675" max lift (Spring Pressure Closed: 161 lbs. @ 1.800" Spring Pressure Open: 472 lbs. @ 1.150")...and nobody is having issues with that...
I'm running a bit more than that with no issues
typically when you snap a rocker, its because a spring broke, which causes way more stress on the rocker than the springs ever did...
there are guys making some pretty big power with way more lift and way tougher springs that are not having issues....
06-23-2012, 03:51 PM
#6
The extremes are fine on the seat pressure area, but the PRC's are pretty harsh...even the ones rated at .650 lift. The stock rockers are claimed to be able to hold 400# seat pressure reliably. Im not saying he is going to snap a rocker within the first WOT run lol. Im simply stating that it does start to wear on the rockers (tips).
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06-23-2012, 05:34 PM
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