What valve springs should I use ??
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never said Isky was wrong??? Hell, lets call Ed. lol
Oh...so now Isky and Teague are wrong and you are right?
Look again at their specs for the 8005...
150lbs@ 1.875 installed height...You are wrong or you can't read. BTW Type of cam...Solid.
The springs don't care what kind of cam you are using, the cam specs desiginate the spring rate!
I told you I didn't want a pizzing contest, but you have turned it into one.
Maybe RMbulder will chime in and straighten us out!
Dave
Look again at their specs for the 8005...
150lbs@ 1.875 installed height...You are wrong or you can't read. BTW Type of cam...Solid.
The springs don't care what kind of cam you are using, the cam specs desiginate the spring rate!
I told you I didn't want a pizzing contest, but you have turned it into one.
Maybe RMbulder will chime in and straighten us out!
Dave
#22
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Ragged's Right!!!
When it come to the stock 500's, which is where this started guys, you are both somewhat off. And I'm the one that is right on with the specs, and spring choice for the application in question.
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Oh...so now they are the Plus...Change your mind again?
Why would you run less spring pressure then Merc uses?
The Compcams 929 have a seat pressure of 148 @1.880 your recomendation is to go to a 135-140. Sure why not.
I'm done....
Dave
Why would you run less spring pressure then Merc uses?
The Compcams 929 have a seat pressure of 148 @1.880 your recomendation is to go to a 135-140. Sure why not.
I'm done....
Dave
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Change my mind?? As soon as i figure out how to post the info from MY ISKY cat. I will. 150psi is too much countinous pressure for a Hyd. roller, bar none. Merc. specified this do to the springs the factory installed, they would relax to about 120psi after minimal usage. But I guess you would not know, becuase obviously you have never been hands on in one to really tell. I don't give a **** if the pope says to run 150psi, thats too much constant pressure on a hyd. cam. Hell, we ran 150psi on +.700 lift soild rollers back in the seventies, when 150psi WAS a big spring. I have even rolled our own springs, buying Chrome-silicon wire, from D&S wire, back when they were still in Linden NJ about a million years ago. So, believe me, I'm not some 18yr. old jack-off on here speaking of **** I don't know a little about. I guess this is why I never embraced the computer internet age too well, just trying to help, but this is too intense, I guess i'll leave the Q&A's to experts like yourself. Bye, Mark
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150psi is too much countinous pressure for a Hyd. roller, bar none. Merc. specified this do to the springs the factory installed, they would relax to about 120psi after minimal usage. But I guess you would not know, becuase obviously you have never been hands on in one to really tell.
I have had my hands in many motors, never claimed to be an expert. Just sharing an opinion...
Dave
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#26
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Here's some more of my opinion...Follow the link to Crane's website for a cam similar to the 500efi
Crane
Pay special attention to the required spring pressures!
Anything else?
Dave
Crane
Pay special attention to the required spring pressures!
Anything else?
Dave
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#27
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What's wrong with mine?
So someone has been able to calculate the loss of spring pressure, well let's say "after minimal usage". Another wonder of the world. Good for you, dig that hole deeper! I'll look for that in the Merc TSB's...It's gotta be there if you say so.
I have had my hands in many motors, never claimed to be an expert. Just sharing an opinion...
Dave
So someone has been able to calculate the loss of spring pressure, well let's say "after minimal usage". Another wonder of the world. Good for you, dig that hole deeper! I'll look for that in the Merc TSB's...It's gotta be there if you say so.
I have had my hands in many motors, never claimed to be an expert. Just sharing an opinion...
Dave
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Aren't we talking Boat engines?
Still living in the old days...Things have changed, It's going to be 2008 soon...Not 1972!
BTW, You must have a special Isky catalog (Also from 1972)
Dave
Still living in the old days...Things have changed, It's going to be 2008 soon...Not 1972!
BTW, You must have a special Isky catalog (Also from 1972)
Dave
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Mark
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We are talking STOCK 500efi here that turn 5350 rpms, not super modified Drag boats. What info do you want to post?
Dave
Dave
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Last edited by axapowell; 12-28-2007 at 09:04 PM.