Pushrods

[Cuda54]

With Edelbrock alum heads you need to use 3/8 push rods it is listed on their site. They used 5/16 in my 440 and I had some bend and I broke a lifter. Good thing it happened a 1/2 a block from my house. But when I went to fix it I found out the push rods were to small. I went to Edelbrocks site and found that they come with 3/8 rods for the Performer heads. Mine was a six pack so they had a roller cam cut to specs. Then used the wrong size rod because of the lenght they had some 5/16 the lenght they needed. But it really need to be 3/8 to work with the big heads. You might need to use a different rocker too. You do not want it to blow the first time you start it.

[Bluemonster71RT]

Why would I want to change my rockers? I have heard mostly good things about them and that was what was recomended from the builder. As far as the push rods I saw that it says 3/8. The people I talked to about the rods didn't seem to have a issue with the 5/16. Every other rod choise was 5/16 for my app so thats what I ordered. Don't know what to do about that. Maybe I'll get lucky and they have sent me 3/8 rods with the 5/16 ball and cup.

[Chryco Psycho]

of all the Alum rockers T&D & Harlands are the best ones so no I would not swap them .
 The Pushrods are made to order from Smiths so if you have cam & spring specs when you order them you get different wall thickness / strength pushrods made , 5/16 has nothing to do with strength , a 3/8 could be weaker than an HD 5/16 one

[Bluemonster71RT]

of all the Alum rockers T&D & Harlands are the best ones so no I would not swap them .
 The Pushrods are made to order from Smiths so if you have cam & spring specs when you order them you get different wall thickness / strength pushrods made , 5/16 has nothing to do with strength , a 3/8 could be weaker than an HD 5/16 one

Thanks for the peace of mind CP.  I was thinking about that same issue as far as strength goes and in my thoughts the only way I could see a bent pushrod was if it bound up,was to long or the geometry was off. If everything was right in the world I suppose in theory you could use a toothpic as a pushrod   I have to belive that a pushrod making place wouldn't steer me wrong and I'll hope for the best.

[Chryco Psycho]

simple math will tell us that a larger diameter tube is stronger just based on the diameter but the 5/16 heavy wall tube can still be stronger than a 3/8 thin wall tube

[PlumCraZRT]

simple math will tell us that a larger diameter tube is stronger just based on the diameter but the 5/16 heavy wall tube can still be stronger than a 3/8 thin wall tube

The engineering would tell you that the equal strength 3/8 rod would be lighter though... 

 

[Chryco Psycho]

also true 

[high perf mopar]

just bought a set of smith bros 3/8 .083 wall chromemoly pushrods.ball/cup, 9.450 o/a lenght monday morning for my engine rebuild installing a lunati 60333 solid roller with eddy rpm heads with the LAST set of RAS 440 MAX rocker arm spealties rocker arms S.S. bushed,1000lb open pressure ready,,, they had and they arrived an hour ago!!!they asked where i heard about them and i said from a moderator on the cuda-challenger forums..i think they know u chryco!

the last set i bought was from manton for my long gone hemi project..needed 3/8 thick wall tubes for a max open pressure of 550 lbs..nice looking rods... 

[Chryco Psycho]

They better know me , I ordered 20 sets or so in the last 5 years 

[high perf mopar]

They better know me , I ordered 20 sets or so in the last 5 years 

maybe i should have asked for the volume discount!!!lol.

[Bluemonster71RT]

A lot of us must be buying them there because when I told him I got there from here he said "another one" in like a supprised tone as if he heard Cuda-Challenger.com a few times lately

[Chryco Psycho]

well I recommend them because they have an excellent product combined with excellent service

[high perf mopar]

hey chryco

whats your thoughts on back cutting the intakes??i had mine done when the machine shop was checking/setting up my edelbrock rpm heads,,picking them up friday to reassemble the motor over my week off,,thanksgiving holiday,,rumor has it thats good for a 5% flow increase,,along with my port cleanup..310-315 cfm flow ???based upon 290 stock...

[Chryco Psycho]

everything helps , backcutting the valves & polishing the back of them will increase flow

[Chryco Psycho]

maybe i should have asked for the volume discount!!!lol.

 Seriously we should talk to them about a discount for members here or even advertising & sponsoring this site