I made sure to go with a mild cam for my EFI 460. It's a RV Crane Cam. I picked up a Crane Double Roller 68 timing kit a couple days before I bought the cam and lifters. Am I going to need new valve springs, Push Rods, etc?

<table border="0" cellpadding="0" cellspacing="0" width="100%"><tbody><tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Cam Style:</td> <td class="overview-c2" width="75%">Hydraulic flat tappet</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Basic Operating RPM Range:</td> <td class="overview-c2" width="75%">1,300-5,600 RPM</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Intake Duration at 050 inch Lift:</td> <td class="overview-c2" width="75%">218</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Exhaust Duration at 050 inch Lift:</td> <td class="overview-c2" width="75%">224</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Duration at 050 inch Lift:</td> <td class="overview-c2" width="75%">218 int./224 exh.</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Advertised Intake Duration:</td> <td class="overview-c2" width="75%">262</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Advertised Exhaust Duration:</td> <td class="overview-c2" width="75%">270</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Advertised Duration:</td> <td class="overview-c2" width="75%">262 int./270 exh.</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Intake Valve Lift with Factory Rocker Arm Ratio:</td> <td class="overview-c2" width="75%">0.513</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Exhaust Valve Lift with Factory Rocker Arm Ratio:</td> <td class="overview-c2" width="75%">0.520</td> </tr> <tr onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Valve Lift with Factory Rocker Arm Ratio:</td> <td class="overview-c2" width="75%">0.513 int./0.520 exh. lift</td> </tr> <tr style="background-color: rgb(255, 255, 255);" onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <td class="overview-c1" width="25%">Lobe Separation (degrees):</td> <td class="overview-c2" width="75%">110</td></tr></tbody></table>

 

I would put some better springs on it. Pushrods should be fine. I would recommend getting a rocker shim kit from Crane Cams to set lifter preload if the valves are still non adjustable.

 

What benefit would I get from better springs. Is there any specific way to match the valve springs or just go with a pair of new valve springs? Also when you say lifter preload, what exactly is that going to be?

Just curious and want to find out everything I need before going into the installation.

 

I have got everything in finally. I will start it this weekend. Since I'm putting new valve springs on, should I just pull the heads, and bring them to a shop to get the valves grinded, and while at it have them put on my valve springs, so I don't have to get a valve spring compressor, etc? How much would this run? Is there going to be any bearings I'm going to need to replace? I don't want to pull the engine from my truck.

 

Hey oricle their is an ongoing debate if the newer EFI 460 have the 4deg. retarded timming set in them or not. Sense your going to be replacing yours can you check back here and let us know what you find?
Thanks leadmic

 

Ok, I can do that. Is it possibly just certain one's that do, and certain ones that don't? For example California trucks, etc for emission purposes? As for my questions though, is it going to be worth it, while I'm doing the valve springs, to pull my heads and get them grinded, and have them do the valve springs? I'm guessing if I do any porting on them it will throw off the speed density; the reason I went with a RV cam.

 

Im not sure if their is a diffrence, is your truck a 49 state model or a Ca. modle? What is the crane number of that cam? I think by the spiecs given I would change the valve springs. You can change them without pulling the heads. I would change the seals at the same time.
Leadmic

 

I don't have a valve spring compressor(I could of course get one though). Some people said I should have the valves grinded. I ordered new springs also, just debating if I want to get a valve spring compressor, and do it myself or have a shop do this. What is the average time of replacing the camshaft, and valve springs(of course I will be putting on new parts, timing chain, cover, etc). My truck is made in Canada. Will not changing the seals affect anything? Also there's no bearings I will need to replace, correct? Just gaskets.