Cam and valvetrain longevity....??? low duration high lift...
#1731
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The .750 wheel will handle a higher acceleration rate than a .700 wheel. Most of the "modern lobes" we are using these days have much faster acceleration rates. You can have two cams with 240* .700" lift. They can have very different acceleration rates. The more acceleration you have in the lobe the larger the wheel you need. The larger wheel acts like a gear reduction...
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#1733
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I can get .750 wheel Johnson solids at a great price, just not sure I want to go with Solids yet... removing exhaust for lashing sounds like it sucks... thought I may be able to keep pushrods the same if I go to short travel hydraulic, but Randy said that will change... that makes solids much more of an option if I have to buy pushrods anyway.
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#1734
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Since we are talking about lifter designs, what are the pros and cons of running a "swedged" axle , vs an axle that is held in place by a wire lock?
I did some googling like havoc40 suggested, and stumbled on this topic where on another site they were comparing johnsoms vs morels . Here a guy claimed his "swedged " axle came out of his johnson lifter.
http://speedtalk.com/forum/viewtopic.php?f=1&t=42149
I did some googling like havoc40 suggested, and stumbled on this topic where on another site they were comparing johnsoms vs morels . Here a guy claimed his "swedged " axle came out of his johnson lifter.
http://speedtalk.com/forum/viewtopic.php?f=1&t=42149
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#1735
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I expect 250 pages before Tim even begins assembly! Lol
I never gave much thought to lifters before watching a show about a NASCAR engine builder who used an electron microscope to check brand new lifters. The rejection rate was quite high.
I never gave much thought to lifters before watching a show about a NASCAR engine builder who used an electron microscope to check brand new lifters. The rejection rate was quite high.
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#1738
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Since we are talking about lifter designs, what are the pros and cons of running a "swedged" axle , vs an axle that is held in place by a wire lock?
I did some googling like havoc40 suggested, and stumbled on this topic where on another site they were comparing johnsoms vs morels . Here a guy claimed his "swedged " axle came out of his johnson lifter.
http://speedtalk.com/forum/viewtopic.php?f=1&t=42149
I did some googling like havoc40 suggested, and stumbled on this topic where on another site they were comparing johnsoms vs morels . Here a guy claimed his "swedged " axle came out of his johnson lifter.
http://speedtalk.com/forum/viewtopic.php?f=1&t=42149
Swedged axle vs. wire clip axle is another highly debated topic. Again, what does this have to do with the issues here? Tim did not have a bearing failure or even a lifter failure.
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I'm really not getting into the possible cause of failure because I don't know enough information. More guesses and accusations will not help this situation. I actually build engines and know what it takes to figure out a problem like this. You need quality measuring/inspection tools and inspect each and every component at the same time. It's a system and needs to be analyzed as such. I think once he goes with parts that are proven to work he'll have reliable engines for years to come.
Havoc40/ Randy, what spring pressure is the 2126 lifter designed to sustain? That seems to be absent from the website. Thanks. Edit- is it possible to categorize it, could you say xxx lbs should be good indefinitely, xxx lbs should be checked/ replaced after a certain time, xxx lbs shouldn't be used at all etc ? Thanks
Last edited by Havoc40; 11-29-2016 at 03:47 PM.
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#1740
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That particular lifter is a Topline Hy-Lift product. They continue to use the Johnson name even though we own the registered trademark, it's a legal nightmare. You can tell by the flat bottom. All of our lifters have a relief cut, up the sides of the roller to allow for more duration. Been that way since late 90's.
Swedged axle vs. wire clip axle is another highly debated topic. Again, what does this have to do with the issues here? Tim did not have a bearing failure or even a lifter failure.
Swedged axle vs. wire clip axle is another highly debated topic. Again, what does this have to do with the issues here? Tim did not have a bearing failure or even a lifter failure.
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