Thread: roller cam vs. non-roller short block

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Is the only difference in a roller cam 302 block and a non-roller block the cam that's installed? in other words are the cams interchangeable between the two and what really makes it a roller or non-roller is the cam that's in it?

Is the only difference in a roller cam 302 block and a non-roller block the cam that's installed?

The short answer is no. A roller cam takes roller lifters and a mechanism to keep the roller lifters from rotating in the bores.

But any motor can be made roller right? With the right cam, lifers, rockers, etc.??

At what point is a must? Above a certain RPM range?

jb

that's what I was getting at... if i'm going to use a new cam, lifters, heads, & valve train, are the blocks interchangeable? For my purpose, i can go with forged or the hyper pistons so i'm ignoring that difference for the moment.

I'm not totally sure either, to be honest. I'll be keeping an eye out for the answer too!

rf....

Dont quote me but i beleive most blocks are interchangable. One of the things a roller block needs is a housing or recess to slide the lifter plates into. which can be machined

The block will have to be machined. But it is not that big a deal.

I personally would go with a roller cam and the forged pistons.

i've never had any machine work done to put roller lifters in old blocks before .

Me either, Denny.

You will have to run a small base circle cam

to which you will have to drill and tap the block (Machine shop)

Or run the crane reto-fit lifters ($400.)

OK, i'm confused now Denny and Mike, lets rephase that question a bit.

Can you put a late model chev roller cam and lifters into the early 1955 - 1986 1st generation blocks ?

Awaiting your awnsers with many thanks. Mike (S)

"this is a roller cam, dont see where you have to do nothing but put it in."

Part Number 12-705-8
__Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS 300A-R10
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0.02 0.02
Gross Valve Lift 0.575 0.575
Duration At 0.015 Tappet Lift 300 300

--------------------------------------------------------------------------------

Valve Timing At 0.015
Open Close
Intake 44 76
Exhaust 84 36

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 255 255
Lobe Lift 0.3833 0.3833
Lobe Separation 110

--------------------------------------------------------------------------------

Recommended Valve Springs 977-16

this is just lifters, but they do talk about "including small base circle and offset applications." must be 1996 up maybe. MIT QUK explane the small base circle if you will.
i think he is talking about a 302 ford anyway.

Chevrolet V8 265-400 1965-1996: The best all-around lifter available. Perfect for any application wi
PART #818-1
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DESCRIPTION:
Endure-X Solid Roller Lifters

For years COMP Cams® Super Roller Lifters have set the standard for solid roller lifter technology. But today’s engines place a greater demand on lifters, unlike ever before. In keeping with the heightened requirements, COMP Cams® has not only changed the name of this industry standard, but more importantly enhanced its durability with a series of innovative upgrades.

Most significant among the upgrades is the addition of EDM Oil Injection™ technology which ensures the bearing assembly receives a constant flow of pressurized oil. Unlike other lifters that offer pressurized oiling only as an upgrade, EDM Oil Injection™ technology is included standard in every Endure-X™ Solid Roller Lifter. This virtually eliminates needle bearing oil starvation, historically a “problem area” for solid roller lifters when used in low RPM and street applications. To further strengthen the bearing assembly, the Endure-X™ Solid Roller Lifters also include needle rollers that are precision sorted by size; evenly distributing loads to avoid premature wear and failure.

In addition to the new upgrades, all Endure-X™ Solid Roller Lifters still contain the features that made them the “preferred choice” among performance engine builders. Every lifter is fully heat treated, machined to ultra-high tolerances and fully rebuildable. The COMP Cam® patented link bar assembly blends all the advantages of a removable link bar, with the safety of a captured link bar. COMP Cams® Endure-X™ Solid Roller Lifters are available for a variety of applications, including small base circle and offset applications.

Originally posted by rficalora
302 block

key word

Originally posted by MIT QUK
key word

i'm talking chevy. i dont know what everybody else is talking about, so just forget anything i said. southerner made me do it.