Author Topic: Tapered Pushrods  (Read 2918 times)

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Offline Topend

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Tapered Pushrods
« on: Tuesday, January 25, 2011. 07:58:00 AM. »
Thinking of a set of tapered pushrods. I searched for old threads and seen a few people thought Smith Brothers tapered pushrod was a good product. SE pushrods had the cracked nut problem. Who carries the Smith Brothers pushrods? Any other recomendations on a tapered pushrod?
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline NWClassic

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Re: Tapered Pushrods
« Reply #1 on: Tuesday, January 25, 2011. 08:07:39 AM. »
I use them, there quality is second to none in my opinion!!  Look them up on the web, you can order from them directly.  There located in Bend, Oregon!

Offline Sonny S.

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Re: Tapered Pushrods
« Reply #2 on: Tuesday, January 25, 2011. 08:35:04 AM. »

Offline djl

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Re: Tapered Pushrods
« Reply #3 on: Tuesday, January 25, 2011. 08:48:46 AM. »
Smith would be the better of the two.  Heavier and more rigid and also a little more work to adjust because of the pushrod design.  The SE tapered are pretty nice as well and, from what I read and hear, the nut problem has been addressed. I experienced the adjustor nut problem, poor quality and they would crack from the inside out but would not break unless you really over tightened.  I had two come loose but am running them again with the replacement G8 adjustors machined to replace the OEM units. I also run a set of SBs in the other bike.
« Last Edit: Wednesday, January 26, 2011. 09:31:25 AM. by djl »

Offline HD Street Performance

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Re: Tapered Pushrods
« Reply #4 on: Tuesday, January 25, 2011. 09:20:55 AM. »
The orginals may be G8 but they are so thin and hard they crack. I would use 304 if I was making them.

Offline Topend

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Re: Tapered Pushrods
« Reply #5 on: Tuesday, January 25, 2011. 10:32:40 AM. »
Thanks for the input... :up:
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline Max Headflow

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Re: Tapered Pushrods
« Reply #6 on: Tuesday, January 25, 2011. 01:06:24 PM. »
They have new quick installed that are a bit of a PITA to install but they are plenty stiff.. If you bust a nut  :teeth:, they'll sell parts which is real good..  Not busted one yet tho..  :wink:

Max
Aka Mousinator, Another Wasted Minute With Max,
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Offline Topend

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Re: Tapered Pushrods
« Reply #7 on: Tuesday, January 25, 2011. 03:24:45 PM. »
Max,
What makes them difficult to install?
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline Max Headflow

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Re: Tapered Pushrods
« Reply #8 on: Tuesday, January 25, 2011. 04:22:49 PM. »
Not really difficult,, They just take more time.. and are a bit of a PITA to remove,..

The typical pushrod has 2 ends and a nut.. Smith as 2 ends, a threaded middle and 2 nuts..

You need to thread the middle into the top and add the 2 nuts, leaving out enough threaded part to start the bottom.. You add a drop red of LT to the bottom, slide the pieces into position, then play with the nuts to thread the middle till it's jammed into the bottom. It take at least 2 shots to get the threaded rod worked into the bottom and seated. Maybe 3 if you milled some off the heads..  LT one nut locked to the bottom and use the remaining nut to adjust the push rod preload with the top..

Taking it apart is the reverse and you need to fight the loctite..

These are by far the strongest and one of the thinnest tapered pushrods you can get tho..

Max
Aka Mousinator, Another Wasted Minute With Max,
No Collar to the Bone

Offline Topend

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Re: Tapered Pushrods
« Reply #9 on: Wednesday, January 26, 2011. 10:15:40 AM. »
Thanks again for the info Max.
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline Topend

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Re: Tapered Pushrods
« Reply #10 on: Thursday, January 27, 2011. 07:34:20 AM. »
Called Smith Brothers today and ordered there #AHD79SB-TC 7/16" x .095" pushrods. Winter & non heated garage so I am in no hurry with shipping and should be here in a week or so. Won't get in the garage until Feb. sometime to install them after I pickup a small propane heater. I have a few things I would like to do at the same time. 1) new oil spring bypass, 2) thinking of going back to a 2 into 2 exhaust (I know I will be giving up a little hp & tq if I do) 3) Install a set of alum DelKron rocker arm supports with the +030" I pickup reasonable last year after my build. I sometimes get the famous TC noise so this is my last effort to quite it down. I did the clearances of the pushrod tubes, valve covers etc. I will recheck everything again. I did not turn the motor over and watch the pushrods after assembly last year so I suspect I will find something making contact somewhere.
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline 1FSTRK

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Re: Tapered Pushrods
« Reply #11 on: Thursday, January 27, 2011. 07:42:32 AM. »
Could you please post the weight of the new pushrods when you get them. I am always interested in weight VS strength when it comesto the valve train.
Thanks

Offline Topend

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Re: Tapered Pushrods
« Reply #12 on: Thursday, January 27, 2011. 07:48:10 AM. »
1FSTRK,
I will sneak them on my wife's electronic food scale when I get them... : )
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline 1FSTRK

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Re: Tapered Pushrods
« Reply #13 on: Thursday, January 27, 2011. 09:02:02 AM. »
1FSTRK,
I will sneak them on my wife's electronic food scale when I get them... : )

Be very careful. I used the kitchen oven to bake wrinkle paint on heads and cylinders once and if I count the price of the  :gob: it would have been cheaper to have them powder coated and diamond cut
Thanks

Offline Topend

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Re: Tapered Pushrods
« Reply #14 on: Saturday, February 05, 2011. 06:37:31 AM. »
Got the pushrods this past Friday, not bad with having a snow storm.
The quality and appearance looks strong and everything is very smooth and sleek with engraving on each one for intake & exhaust. I looked through the middle for junk but looked clean as it should. The weight of them are 127 grams & 129 grams each (short & long). Came in a nice box with a foam divider that separates everything and a paperfilm that absorbs moisture; directions for installation; two cool stickers; lock tight; a tool to hold the pushrod tube up while doing the adjustments; four pushrods; pushrod tubes not included. To my non professional eye the quality, finish and overall appearance are much better and stronger than my SE adjustable pushrods.
« Last Edit: Saturday, February 05, 2011. 06:41:20 AM. by Topend97 »
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline 1FSTRK

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Re: Tapered Pushrods
« Reply #15 on: Saturday, February 05, 2011. 07:02:28 AM. »
 :up:
Thanks for the info. Sounds like a nice product . Don't forget to update us after you have run them a while.

Offline Topend

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Re: Tapered Pushrods
« Reply #16 on: Saturday, February 05, 2011. 07:14:50 AM. »
Will give an update on the install process and after I run them for a period of time.
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline 2tired

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Re: Tapered Pushrods
« Reply #17 on: Sunday, February 20, 2011. 02:22:18 PM. »
Just for comparison I measured a new set of SE #18404-08 push rods at 104 grams intake and 105 and 107 grams exhaust.  Measured a second time to confirm difference in the exhaust on a digital food scale.

Offline Topend

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Re: Tapered Pushrods
« Reply #18 on: Sunday, February 20, 2011. 03:41:05 PM. »
2tired,
Were they the tappered SE pushrods? What is the dia. of each end? I did not measure the dia. of the new pushrods but will do before the install.
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust

Offline 2tired

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Re: Tapered Pushrods
« Reply #19 on: Saturday, March 05, 2011. 07:45:30 PM. »
Sorry for delay.  Hadn't checked back for a few days.  They taper from 0.375 at the top to 0.435 just above the lower nut area.  Bottom stud is 0.335.

Offline Topend

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Re: Tapered Pushrods
« Reply #20 on: Sunday, March 06, 2011. 04:46:26 AM. »
2tired,
Should warm up soon and I will be installing the Delkron .030" rocker supports, new pushrods, oil bypass spring. I will be looking for any contact marks on the current push rods, valve covers etc..
95 CU IN, Stock cams, 42 Mikuni & Free Flow AC, Modified Pro-Pipe Exhaust