Tvs 1900 lsj build
01-24-2012, 04:50 PM
#102
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lol no not realy it isent but since the gmr cams have such a small base circle the hydraulic lash adjusters over extend and beat themselves to death that is why you need solid lash adjusters if the base circle was the same size as stock or close to it then the stuff would work just fine
01-24-2012, 06:52 PM
#105
even for a flat tappet cam .499 isent much lift i have ran past mid .500 lift on an a hyd flat tappet cam for years in a smallblock mopar
01-24-2012, 07:59 PM
#106
there was a guy on the redline forums that made some spacers or sometrhing and put under the lash adj to raise them up and ran the gmr cams without a problem
even for a flat tappet cam .499 isent much lift i have ran past mid .500 lift on an a hyd flat tappet cam for years in a smallblock mopar
even for a flat tappet cam .499 isent much lift i have ran past mid .500 lift on an a hyd flat tappet cam for years in a smallblock mopar
There is no/little room for valve caps and due to the LSJ's head design, simple loose washers under the adjusters will fall out. So...
01-25-2012, 01:07 AM
#108
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there was a guy on the redline forums that made some spacers or sometrhing and put under the lash adj to raise them up and ran the gmr cams without a problem
even for a flat tappet cam .499 isent much lift i have ran past mid .500 lift on an a hyd flat tappet cam for years in a smallblock mopar
even for a flat tappet cam .499 isent much lift i have ran past mid .500 lift on an a hyd flat tappet cam for years in a smallblock mopar
01-25-2012, 09:33 AM
#114
Thats a serious ramp angle. Certainly a solid lifter only cam.I wasnt talking about lift. I mean how fast the lift builds and falls. If it falls too fast you can slam the valves into the valve seats and risk breaking a valve and/or wearing out the valve seat too fast. And on more normal lifter setups if the ramp angle is too high it can build too much pressure inside the lifter that it can blow oil through places that it shouldnt go, which makes for a sad lifter.
you should go read up frl cams and hyd roller cams and lifters in general
01-25-2012, 09:46 AM
#115
the valves always shut firmly. ive heard an engine being spun by an electric motor to demonstrate how much power it takes just to operate the valvetrain and the noise was very close to the same as an engine burning fuel. Ive seen some crazy cams where the valve hardly seem to ramp up and down at all just pop up pop down and as long as your running good valves failure isnt an issue. Do radical parts wear out faster than stock? sometimes. but if the part is made stronger in proportion to the increased strain then its zero sum. thats one of the best things about running an sbc, the availability of titanium valves 
01-25-2012, 10:02 AM
#116
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It doesn't look to me like he was claiming that high duration=steep ramp, i think he was saying that there wasn't as much difference between .050 duration and advertised duration as there usually is, which does indeed indicate an agressive lobe that slams the valves open and closed very quickly.
01-25-2012, 10:32 AM
#118
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It doesn't look to me like he was claiming that high duration=steep ramp, i think he was saying that there wasn't as much difference between .050 duration and advertised duration as there usually is, which does indeed indicate an agressive lobe that slams the valves open and closed very quickly.
01-25-2012, 11:13 AM
#119
you can put any duration number in there there realy isent enough information given to determine wat you are saying go dig around you might be suprised
Tilden Technologies - Camshaft Design
Intensity & Duration
Tilden Technologies - Camshaft Design
Intensity & Duration
01-25-2012, 11:23 AM
#121
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No, the relation between 050 duration and total duration can give you a very good idea on the ramp angle, because its literally a direct correlation between how close the two numbers are together and how aggressive the angle has to be. This assumes that the total duration is taking from the same point. He calls this Intensity in the Intensity & duration article.
01-25-2012, 11:53 AM
#122
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No, the relation between 050 duration and total duration can give you a very good idea on the ramp angle, because its literally a direct correlation between how close the two numbers are together and how aggressive the angle has to be. This assumes that the total duration is taking from the same point. He calls this Intensity in the Intensity & duration article.
The only reason that the difference between .050 and advertised duration wouldn't give a good idea of how agressive the lobe is, is in the case of different points being used to measure the advertised duration - i.e. Back in the day, gm measured at absolutely no lift, and iirc ultradyne cams were measured at .020. I take it that euthanasia measured these cams?? If thats the case I'm sure he used a common point to measure from, so yeah its a pretty agressive lobe, which we already knew from having to use solid lifters.
The only additional information that i see being useful here is the .100 and .200 durations, but that would be pretty pointless, because we have nothing to compare to.
01-25-2012, 11:53 AM
#123
no not all a fight
ok but one point your missing is the cam grinder can put what ever advertised duration number he wants on the cam its a numbers game that has been played and is still being played to sell products advertised duratation dosent mean **** to determine how intense or aggresive a cam is you need to take a deeper look
No, the relation between 050 duration and total duration can give you a very good idea on the ramp angle, because its literally a direct correlation between how close the two numbers are together and how aggressive the angle has to be. This assumes that the total duration is taking from the same point. He calls this Intensity in the Intensity & duration article.
01-25-2012, 11:54 AM
#124
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No, the relation between 050 duration and total duration can give you a very good idea on the ramp angle, because its literally a direct correlation between how close the two numbers are together and how aggressive the angle has to be. This assumes that the total duration is taken from the same point. He calls this Intensity in the Intensity & duration article.
no not all a fight
ok but one point your missing is the cam grinder can put what ever advertised duration number he wants on the cam its a numbers game that has been played and is still being played to sell products advertised duratation dosent mean **** to determine how intense or aggresive a cam is you need to take a deeper look
ok but one point your missing is the cam grinder can put what ever advertised duration number he wants on the cam its a numbers game that has been played and is still being played to sell products advertised duratation dosent mean **** to determine how intense or aggresive a cam is you need to take a deeper look
01-25-2012, 11:58 AM
#125
Yep
The only reason that the difference between .050 and advertised duration wouldn't give a good idea of how agressive the lobe is, is in the case of different points being used to measure the advertised duration - i.e. Back in the day, gm measured at absolutely no lift, and iirc ultradyne cams were measured at .020. I take it that euthanasia measured these cams?? If thats the case I'm sure he used a common point to measure from, so yeah its a pretty agressive lobe, which we already knew from having to use solid lifters.
The only reason that the difference between .050 and advertised duration wouldn't give a good idea of how agressive the lobe is, is in the case of different points being used to measure the advertised duration - i.e. Back in the day, gm measured at absolutely no lift, and iirc ultradyne cams were measured at .020. I take it that euthanasia measured these cams?? If thats the case I'm sure he used a common point to measure from, so yeah its a pretty agressive lobe, which we already knew from having to use solid lifters.
Last edited by mrbelvedere; 01-25-2012 at 12:05 PM.