Evo motor swap?
Stellar HDF Member
Joined: Jul 2011
Posts: 2,583
Likes: 115
From: Boston, MA
I don't think stock rods will work with many aftermarket cams. When I was looking into Wood cams he said not to use the stock pushrods.
Outstanding HDF Member
Joined: Jul 2013
Posts: 2,874
Likes: 36
From: Houston, TX
Stock rods working just fine with my evl3010. I believe that is only recommended if you're getting into high lift cams. Can't adjust the valves on an evo like a 350 chevy, so that only leaves one option... adjustable pushrods.
Last edited by tmanbuckhunter; Jul 14, 2014 at 08:35 PM.
Seasoned HDF Member
Joined: May 2008
Posts: 21,175
Likes: 12,747
From: South Carolina
Originally Posted by Tee⋁12986892
I don't think stock rods will work with many aftermarket cams. When I was looking into Wood cams he said not to use the stock pushrods.
Road Master
Joined: Feb 2014
Posts: 913
Likes: 5
From: indiana
and on the pushrods there is a lot of factors you need to know before you decide you need adjustable push rods. IMO the stock pushrod are the best way to go. BUT sometimes stock just wont work right.
If you shave the heads you will need shorter pushrods
If you use shorter head gaskets you will need shorter pushrods
If you shorten the cylinders to correct deck height you will need shorter push rods
If your cam has a smaller base circle you will need longer push rods
If you use S&S HL2T kits in your lifters you will definitely need adjustable push rods
hydraulic lifters have an optimum set point to make sure the proper amount of oil makes it to the heads and the lifters stay primed. .100 +/- .020
So if you take .035 off the heads and .005 off of the cylinders and use .030 head gaskets you have shortened the motor by .055 if you use stock pushrods your lifters are now .045 away from collapsing. not to mention cutting you oil flow to the rockers in half. and thats assuming the lifters were set perfect to begin with.
Novice
Joined: Jun 2009
Posts: 24
Likes: 0
From: Prince George B.C. Canada
The 1985 Evo is a case breather, the 1998 is a head breather. Easy to work around. I just switched cases went from 1984-91 to 1992-99. My 89 case had 2 small cracks at the oil sending hole, behind back tappet block. Check the case real good, for cracks
Seasoned HDF Member
Joined: May 2008
Posts: 21,175
Likes: 12,747
From: South Carolina
Agreed that when any type of machining is done to change the height of the cylinder/head stack up height, the pushrod length may need to change.
I prefer a solid pushrod over an adjustable in any application, even if it means a custom length pushrod.
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6th Gear
Joined: Apr 2011
Posts: 14
Likes: 0
From: Canada
evo motor
I have a 1996 1340 stock I will sell you
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