Pushrods
Thread Starter
|
Advanced
Joined: Jun 2022
Posts: 90
Likes: 14
From: TN
Pushrods
Finally got the pv1 and target tune setup, along with feuling billet camplate and race oil pump and their lifters. Wondering if I need to buy their 1 piece pushrods now and if so what length. I typically don't like 2 piece pushrods due to they deflect too much among other things. I will be removing the tank and rocker covers so other than that why would someone buy adjustable pushrods if the factory ones will suffice? I'm putting the .574 Chris rivas cams in it since i already have them though I might buy the .545 iirc. Do I need new pushrods or will the factory units work even though I'd like to get the thicker wall from feuling etc.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
The stock pushrods are fine tho they may make for a noisy top end as the preload on the lifters are .100 stock. This is assuming the base circle of those cams are the same as stock cams of course. Generally most like the preload at .130 or even .140 to better assure a quieter top end. If you do go new solids, have them custom made .030 longer than stock.
This is the way to go tho as I agree about adjustables tho they do allow for adjusting the preload til the top end is quiet.
This is the way to go tho as I agree about adjustables tho they do allow for adjusting the preload til the top end is quiet.
Last edited by 60Gunner; Jan 11, 2023 at 10:25 PM.
Thread Starter
|
Advanced
Joined: Jun 2022
Posts: 90
Likes: 14
From: TN
The stock pushrods are fine tho they may make for a noisy top end as the preload on the lifters are .100 stock. This is assuming the base circle of those cams are the same as stock cams of course. Generally most like the preload at .130 or even .140 to better assure a quieter top end. If you do go new solids, have them custom made .030 longer than stock.
This is the way to go tho as I agree about adjustables tho they do allow for adjusting the preload til the top end is quiet.
This is the way to go tho as I agree about adjustables tho they do allow for adjusting the preload til the top end is quiet.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
Yes.
Stock can be noisy too BECAUSE of the .100 lifter preload AND shitty lifters.
Not sure on those lifters as the general consensus is the Johnson Hylifts are the best AND cheapest as far as premium lifters go.
Stock can be noisy too BECAUSE of the .100 lifter preload AND shitty lifters.
Not sure on those lifters as the general consensus is the Johnson Hylifts are the best AND cheapest as far as premium lifters go.
Last edited by 60Gunner; Jan 13, 2023 at 06:30 PM.
HDF Community Team
Joined: Jun 2006
Posts: 12,763
Likes: 2,597
From: san antonio
Finally got the pv1 and target tune setup, along with feuling billet camplate and race oil pump and their lifters. Wondering if I need to buy their 1 piece pushrods now and if so what length. I typically don't like 2 piece pushrods due to they deflect too much among other things. I will be removing the tank and rocker covers so other than that why would someone buy adjustable pushrods if the factory ones will suffice? I'm putting the .574 Chris rivas cams in it since i already have them though I might buy the .545 iirc. Do I need new pushrods or will the factory units work even though I'd like to get the thicker wall from feuling etc.
If you are committed to fixed lenght pushrods, you need to do the math. Contact Chris Rivas and determine the difference, if any, between the OEM cam base circle and the base circle of the selected CR cam. Work out the valve train stack up and calculate the length of the pushrod required to set the lifter preload at .125" to .140"; the deeper the better IMHO. Order the fixed length pushrods from Smith Brothers and go from there. Don't know who makes Fueling lifters but believe the Johnson Hy-Lifts a better choice. JMHO.
If you haven't read the "Adjustable Pushrod Advantages" thread in this same section, take the time to read it. It is five years old but has the pros/cons of adjustables as some forum members see them and might help with your bias against adjustable push rods.
Last edited by djl; Jan 14, 2023 at 11:15 AM.
Thread Starter
|
Advanced
Joined: Jun 2022
Posts: 90
Likes: 14
From: TN
Chris rivas told me his cams are same base circle as stock hd cams and different pushrods aren't required. He did say they don't like adjustables due to deflection which they're prone to side loading. I use Smith bros for my blown alcohol drag engines and they hold up well.
Thread
Thread Starter
Forum
Replies
Last Post
AK BAGGER
Touring Models
14
Jul 15, 2010 12:47 AM
