I really lost myself this weekend
Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
Likes: 150
From: ct
Go to Johnson high lift website and read the description for the options they have for bleed rate,three choices I believe for the type of cam you choose to run. And they coincide with the valve spring pressure to control ticking(bled out) thru race application also. Very interesting and wish I knew before I made mistakes,let me know what you think after reading up.
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Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
So I read the whole thing about those special lifters and while I can see the application based on their justification, I'm not on board. Ultimately all they're doing was changing how fast the lifter bleeds down and justifying an application based on the theory of what happens based on bleed down time. Considering the lifter is only loaded a bit less than half the time it's used, and I'm not really sold on why you'd want different bleed rates, having a set of lifters bleed down faster or slower than nature intended doesn't mean that much to me. Thanks for the input though.
Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
Likes: 150
From: ct
That's fine,so you understand that a high lift cam needs a higher pressure valve spring which also requires a slower bleed rate or it will be a noisy top end being robbed of horse power because the valves are not opening as much as the cam wants them to. The reason why most prefer solid lifter for racing.
My Indy accidentally installed high lift spring in my heads but they didn't match my low lift cam and stock eagle lifters,was very very loud,so I had to install new stock pressure springs and now it perfect. Trying to help a brother.
My Indy accidentally installed high lift spring in my heads but they didn't match my low lift cam and stock eagle lifters,was very very loud,so I had to install new stock pressure springs and now it perfect. Trying to help a brother.
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Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
It's cool, I appreciate it.
One other thing I'm perplexed by is that if this isn't a gimmick, why doesn't Jims and S&S offer lifters for various spring rates and cam profiles?
I'll agree, Johnson is technically on to something, but it smells a little bit like snake oil to me.
One other thing I'm perplexed by is that if this isn't a gimmick, why doesn't Jims and S&S offer lifters for various spring rates and cam profiles?
I'll agree, Johnson is technically on to something, but it smells a little bit like snake oil to me.
Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
Likes: 150
From: ct
Oh but they do also,Jim's even offer different applications,they also have a cool lifter that is called the Hydrosolid I believe. It only bleeds out 0.050" versus the normal is around 0.200" I think. Allowing that lifter to perform quiet and minimize bleeding to that point and after that the valve must open because it will be basically solid at that point.
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Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
For what it's worth, I could have just as easily fu*#ed the head up with a $30K Bridgeport.
Road Master
Joined: Dec 2016
Posts: 981
Likes: 182
From: Fairfax County, VA
Brother ain't that the truth. Go figure, freaking test head came out better... If I had a nickel... lol.
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