Futral F10 owners inside
Originally Posted by PREDATOR-Z
It means you need a longer p-rod. If it takes you more than 1 turn (360*) to reach 22ftlbs, then your p-rods are too short. (assuming your geometry is centered).
But that is done with motor warm and lifters pumped.
But that is done with motor warm and lifters pumped.
Sorry guys!
Last edited by GMCVT; Dec 2, 2005 at 12:22 PM.
Originally Posted by m1key99WS6
I have an F10 on 114 in my forged 346 with AFR heads milled .020 and Comp non "r" rockers and i use a 7.400 pushrod and it's not that noisy at all. My comp 216/220 .579 .589 114 was a TON louder in regards to a sewing machine noise.
If you want I have a pushrod length checker that I bought from thunder and I can mail it to you if you want to borrow it.
If you want I have a pushrod length checker that I bought from thunder and I can mail it to you if you want to borrow it.
Originally Posted by GMCVT
OK assuming my geometry is centered, if the pushrod is too short then that means the rocker fulcrum would be closer to the head which "in my mind" means it would take less turns to hit the torque spec. How am I messing this up?
Sorry guys!
Sorry guys!
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Joined: Oct 2005
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Originally Posted by PREDATOR-Z
... If it takes you more than 1 turn (360*) to reach 22ftlbs, then your p-rods are too short. (assuming your geometry is centered)....
Originally Posted by MadBill
Err, I think you have that backwards. Finger tight, the rocker is 'bridging' between the pushrod and the valve stem. The height of the pivot above the pedestal will be greater, i.e. require more turns to pull down into contact, the longer the pushrod.
Just kidding of coarse. I just figure there something I'm missing here. 
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
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From: BFE
Ok, let us back up a little.
Stock heads>right?
Stock gasket>right?
Stock valves>right?
Stock lifters>right?
Then the only thing not stock is your cam which has a smaller base circle that stock cam right?
Then it will require longer p-rods than stock size right?
7.40 are stock size right?
Then your p-rods are too short.
Now almost all vendors say they work fine, but the math says they are too short.
Tell me what is your base circle measurement and I'll tell you by exactly how much.
(sorry, just trying a different approach)
Stock heads>right?
Stock gasket>right?
Stock valves>right?
Stock lifters>right?
Then the only thing not stock is your cam which has a smaller base circle that stock cam right?
Then it will require longer p-rods than stock size right?
7.40 are stock size right?
Then your p-rods are too short.
Now almost all vendors say they work fine, but the math says they are too short.
Tell me what is your base circle measurement and I'll tell you by exactly how much.
(sorry, just trying a different approach)
Originally Posted by PREDATOR-Z
Ok, let us back up a little.
Stock heads>right?
Stock gasket>right?
Stock valves>right?
Stock lifters>right?
Then the only thing not stock is your cam which has a smaller base circle that stock cam right?
Then it will require longer p-rods than stock size right?
7.40 are stock size right?
Then your p-rods are too short.
Now almost all vendors say they work fine, but the math says they are too short.
Tell me what is your base circle measurement and I'll tell you by exactly how much.
(sorry, just trying a different approach)
Stock heads>right?
Stock gasket>right?
Stock valves>right?
Stock lifters>right?
Then the only thing not stock is your cam which has a smaller base circle that stock cam right?
Then it will require longer p-rods than stock size right?
7.40 are stock size right?
Then your p-rods are too short.
Now almost all vendors say they work fine, but the math says they are too short.
Tell me what is your base circle measurement and I'll tell you by exactly how much.
(sorry, just trying a different approach)
