Pushrod Length
Pushrod Length What length should be required here?
lq9 shortblock
799 heads
EPS 230/234 .600/.601 112+4
EPS said 7.425 for a stock ls1, so I picked up a set of those. Also have a set of 7.400s from my previous setup.
When put in there doesnt seem to really be a difference between the two.
Thoughts? Put the 7.425's in and run it? I havent started it yet.
lq9 shortblock
799 heads
EPS 230/234 .600/.601 112+4
EPS said 7.425 for a stock ls1, so I picked up a set of those. Also have a set of 7.400s from my previous setup.
When put in there doesnt seem to really be a difference between the two.
Thoughts? Put the 7.425's in and run it? I havent started it yet.
push rod checker Get a comp cam push rod length checker, there are several write ups that tell how to use it, length of pushrods can be different based on the cam, rockers, and lifters and the lifter pre load.
I will order a PR checker then. For as close as this was I wasnt sure if it was enough to matter or not.
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Joined: Jul 2011
Posts: 452
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If EPS says that a bone stock LS1 takes 7.425" pushrods, then they are probably wrong with any other "recommendations". Better get the pushrod length checking tool.
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EPS said 7.425 for a stock ls1 ...
But now you elaborate that your cam has a smaller base circle, and if that was the only change then yes, you would need longer pushrods.
Did you at least try to determine how many turns the rocker arm bolt went from zero lash to 22 ft-lbs of torque?
Last edited by ZeeOSix; Apr 2, 2012 at 02:47 AM.
Yes, thats my bad. Re reading it, it does sound like thats what I was saying, but its not what I meant. I could have worded that better I suppose.
From what I was told, EPS cams have a slightly smaller base circle, but that again was part of my post, to confirm, or deny that.
Its closer to 1 turn with the 7.425s and almost 2 with the 7.4s.
From what I was told, EPS cams have a slightly smaller base circle, but that again was part of my post, to confirm, or deny that.
Its closer to 1 turn with the 7.425s and almost 2 with the 7.4s.
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Joined: Jul 2011
Posts: 452
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Even the factory LS6 cam with only 0.551" gross lift had to be ground on a smaller base circle for this reason according to Hib Halverson's article.
That's a fact. Once you get beyond the stock gross lift you have to reduce the base circle of the lobes, or the cam won't fit past the bearings.
Even the factory LS6 cam with only 0.551" gross lift had to be ground on a smaller base circle for this reason according to Hib Halverson's article.
Even the factory LS6 cam with only 0.551" gross lift had to be ground on a smaller base circle for this reason according to Hib Halverson's article.
