1,2,3 piece pushrods...Where do I begin? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 24 Old 05-17-2017, 04:17 PM Thread Starter
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1,2,3 piece pushrods...Where do I begin?

My new valve springs features open spring pressures of 448 lbs.
Cam lift is .577
I probably won't take the 347 over 6200 RPM.
Pushrod diameter needs to be 5/16" and 6.450" long overall length.

I'm looking to reduce any pushrod deflection and have good ball to cup fitment.

I'm looking for a little schooling before contacting a supplier.


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post #2 of 24 Old 05-17-2017, 04:59 PM
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Why does the pushrod have to be 5/16" ?


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post #3 of 24 Old 05-17-2017, 05:03 PM Thread Starter
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Why does the pushrod have to be 5/16" ?
Guide plate limitations as well as rocker body interference, not to mention possibly having to open up pushrod holes in heads. Heads are already installed.

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post #4 of 24 Old 05-17-2017, 05:16 PM
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They make pushrods that have 3/8" body that neck down to 5/16" at both ends so rocker arm clearance is not an issue. I seriously doubt that the hole in the head has to be opened up at all, unless you are running the old school cast iron heads that had slots instead of round holes for the pushrods. Guide plates for the 3/8" pushrod are easy to get.

1989 Saleen 414 358cid SBF 2.8L Kenne Bell S/C
26 X 8.5 Hoosier
Best 1/4 mile time 8.623 @ 159.82 mph with a 1.34 60' (5.55 1/8th at 128)
Best 1/8 mile time 5.384 @ 130.75 mph with a 1.29 60'
2001 V-6 5 speed Mustang 189k miles and counting
08' Bullitt #4097 N/A 325 RWHP <<<<<FOR SALE!
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post #5 of 24 Old 05-17-2017, 05:19 PM
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These guys can make anything you want.
Smith Bros. Pushrods | Redmond Oregon

1989 Saleen 414 358cid SBF 2.8L Kenne Bell S/C
26 X 8.5 Hoosier
Best 1/4 mile time 8.623 @ 159.82 mph with a 1.34 60' (5.55 1/8th at 128)
Best 1/8 mile time 5.384 @ 130.75 mph with a 1.29 60'
2001 V-6 5 speed Mustang 189k miles and counting
08' Bullitt #4097 N/A 325 RWHP <<<<<FOR SALE!
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post #6 of 24 Old 05-17-2017, 05:21 PM Thread Starter
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Quote:
Originally Posted by Saleen414 View Post
They make pushrods that have 3/8" body that neck down to 5/16" at both ends so rocker arm clearance is not an issue. I seriously doubt that the hole in the head has to be opened up at all, unless you are running the old school cast iron heads that had slots instead of round holes for the pushrods. Guide plates for the 3/8" pushrod are easy to get.
Thanks. I hadn't thought of that.

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post #7 of 24 Old 05-17-2017, 05:22 PM Thread Starter
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Manton, Trend, Smith Bros??? 1,2, or 3 piece? Pros? Cons?

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post #8 of 24 Old 05-17-2017, 05:24 PM Thread Starter
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These guys can make anything you want.
Smith Bros. Pushrods | Redmond Oregon
Hah! You read my mind.

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post #9 of 24 Old 05-17-2017, 06:42 PM
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The one's that I have always have the best luck with come from FTI. Don't know who his vender is. But the always work pretty damn good. He saves me from the guessing game with his recommendations. Another thing that is kinda funny is they always run quite after I switch over from the sets I always have on hand from the catalog Comps .080 walls that I have collected. Where he gets his I don't have a clue. I always run the 210* ball.
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post #10 of 24 Old 05-17-2017, 06:55 PM
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afr head?


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post #11 of 24 Old 05-17-2017, 07:26 PM Thread Starter
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afr head?
Yes. 185 Renegade.
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post #12 of 24 Old 05-17-2017, 07:31 PM
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Always have had good luck with trickflow...

https://www.summitracing.com/search/...omoly-pushrods
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post #13 of 24 Old 05-17-2017, 08:09 PM
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Yes. 185 Renegade.
Look at where the guideplate notch is in relation to the pushrod hole in the head and you will see why afr is anti 3/8 pushrod in the ford heads. Trend makes the trick flow and many of comp cams pushrods. If you stay with a 5/16 you can just use a .105-.120 wall. Get a 1 piece swedged end pushrod regardless. You dont need anything dramatic either.

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post #14 of 24 Old 05-18-2017, 02:05 AM
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I have a low mile set of trickflow 5/16" 6.450" for $55. I have no use for them anymore.

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post #15 of 24 Old 05-18-2017, 09:50 AM
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Look at where the guideplate notch is in relation to the pushrod hole in the head and you will see why afr is anti 3/8 pushrod in the ford heads. Trend makes the trick flow and many of comp cams pushrods. If you stay with a 5/16 you can just use a .105-.120 wall. Get a 1 piece swedged end pushrod regardless. You dont need anything dramatic either.
I've put 3/8" push rods in "out of the box" AFR heads but it's not done with catalog parts.



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post #16 of 24 Old 05-18-2017, 09:59 AM
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Quote:
Originally Posted by Saleen414 View Post
They make pushrods that have 3/8" body that neck down to 5/16" at both ends so rocker arm clearance is not an issue. I seriously doubt that the hole in the head has to be opened up at all, unless you are running the old school cast iron heads that had slots instead of round holes for the pushrods. Guide plates for the 3/8" pushrod are easy to get.
we had to open the heads up on the highports to fit a 3/8" push rod.

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post #17 of 24 Old 05-18-2017, 11:35 AM Thread Starter
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Thanks for the help guys. I ordered a one piece pushrod set from Smith Bros. I had used them in the past with good results.
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post #18 of 24 Old 05-18-2017, 12:39 PM
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I've put 3/8" push rods in "out of the box" AFR heads but it's not done with catalog parts.

absolutely, but the at home guys, well ya

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post #19 of 24 Old 05-18-2017, 12:41 PM
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we had to open the heads up on the highports to fit a 3/8" push rod.
depends heavily on the rocker or shaft used. pushrod is typically centered in the hole but may be pushed towards to valve cover rail, jesel is good for this

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post #20 of 24 Old 05-18-2017, 12:56 PM
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depends heavily on the rocker or shaft used. pushrod is typically centered in the hole but may be pushed towards to valve cover rail, jesel is good for this
i'll give you 1 guess what we run LOL

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post #21 of 24 Old 05-18-2017, 01:21 PM
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i'll give you 1 guess what we run LOL

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post #22 of 24 Old 05-18-2017, 01:30 PM
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but at this point with that motor... whats opening up a few push rod holes LOL

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post #23 of 24 Old 05-18-2017, 01:51 PM
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i'll give you 1 guess what we run LOL
A "B-Cam" and some Proform rockers?



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post #24 of 24 Old 05-18-2017, 02:55 PM
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A "B-Cam" and some Proform rockers?

welp... we wont have that 8.2 record for much longer... thanks ed!

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