Pushrod question for those running Morel lifters..
Pushrod question for those running Morel lifters.. Going to be installing them and some heads this weekend and already have an LG cam with 7.4 rods in there now. I know the preload on the lifters need to be .030-.050 and I'm curious what people are finding in the Morels v.s the stock lifters when it comes to pushrod length?
My car is a daily driver so I will be measuring and hopefully ordering the proper length Saturday afternoon, and I have done some searching and found a thread saying a guy measured his and they were .010 different. So I guess if the measurement is not too far off 7.4 is it o.k to run them for 3-4 days with the 7.4's until the proper length rods arrive?
My car is a daily driver so I will be measuring and hopefully ordering the proper length Saturday afternoon, and I have done some searching and found a thread saying a guy measured his and they were .010 different. So I guess if the measurement is not too far off 7.4 is it o.k to run them for 3-4 days with the 7.4's until the proper length rods arrive?
Last edited by Jonnie Bravo; Oct 13, 2010 at 04:37 PM.
I would not. The lifters are taller and require less preload, I think you will find the difference closer to 0.100" putting you around 7.300" based on my experience not accounting for the cam swap, which will change the numbers a bit closer to 7.325".
That being said - measure.
Thanks guy's I have the Comp adjustable pushrod so I can measure as it seems like a pretty easy process as from what I'm reading you just turn the cam until it's off the lifter, install the rod and torque the rocker and screw the rod out until it takes out the slack on the rocker, then add .050 for preload?
Although when I bought them they said preload needed to be .030-.050 for preload so I guess my question would be is it best to go with the .030 because the lifters are taller?
I really appreciate all the advice!
Although when I bought them they said preload needed to be .030-.050 for preload so I guess my question would be is it best to go with the .030 because the lifters are taller?
I really appreciate all the advice!
I had the best luck at the upper end and am currently set at 0.050" preload. I have written instructions for the pushrod if you need it. I don't torque to full 22 lb-ft when adjusting, too much needless loading of the aluminum thread in the head.
