MS3 setup
MS3 setup Im doing the MS3 PRC dual spring kit, which size PR's should I get stocklength? some guy earlier said to do 7.350? I am not sure on the size exactly but I think he said a shorter than stocklength. Anyway I was looking for less valvetrain noise, and if you recommend shorter or larger Pr's then stock, whats benefits/setbacks. I just dont want a realllly noisey valvetrain. thanks!
Originally Posted by heavymetals
If the only thing you are changing is the springs, why do you want different length pushrods then what you have already?
So they dont break, and go flying out the side of the block.
Last edited by MRZ28; Mar 22, 2006 at 11:05 PM.
Originally Posted by Robinator
I want to know why TSP puts 7.4's in the package if that cam needs 7.425's.
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Stick with the 7.400". I have the same setup and went with the 7.425" push rod. I found out last night that it is bleeding off cylinder pressure because they are too long. The reading with the 7.425 was 130 psi. I put in a shorter set and it jumped to 170 psi. Most aggressive cams will make valve train noise.
Originally Posted by heavymetals
If the only thing you are changing is the springs, why do you want different length pushrods then what you have already?
OK first i hear use 7.425's to make it quiet, then i see use 7.4's so it wont bleed off pressure. I take it there is no pushrod that s between these lengths to find a happy medium.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by NXZ28
Stick with the 7.400". I have the same setup and went with the 7.425" push rod. I found out last night that it is bleeding off cylinder pressure because they are too long. The reading with the 7.425 was 130 psi. I put in a shorter set and it jumped to 170 psi. Most aggressive cams will make valve train noise.
Your sig says aftermarket heads, were they milled?
What gasket are you running?
Here try this calc for a rough idea, on cam only swaps with stock gaskets 7.425 are it.
http://ourworld.cs.com/ls1info2/Pushrod+calculator.xls
Last edited by PREDATOR-Z; Mar 30, 2006 at 03:10 PM.
Originally Posted by PREDATOR-Z
For 1 that is BS,
Your sig says aftermarket heads, were they milled?
What gasket are you running?
Here try this calc for a rough idea, on cam only swaps with stock gaskets 7.425 are it.
http://ourworld.cs.com/ls1info2/Pushrod+calculator.xls
Your sig says aftermarket heads, were they milled?
What gasket are you running?
Here try this calc for a rough idea, on cam only swaps with stock gaskets 7.425 are it.
http://ourworld.cs.com/ls1info2/Pushrod+calculator.xls
Last edited by NXZ28; Mar 31, 2006 at 01:57 AM.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
For a pushrod to be too long to hang a valve open and bleed pressure, believe me that it would be more than .025" too long
Think about it, that would mean that your lifters are overpowering your springs and opening the valve.
Something else is not kosher.
Think about it, that would mean that your lifters are overpowering your springs and opening the valve.
Something else is not kosher.