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Topic Review (Newest First)
01-21-2013 06:24 PM
Jim Rockford

Finally found a pic of em installed.
12-07-2012 09:16 AM
ChevroletSS Dam roller timing covers are expensive. Im gonna go find one in a junk yard.
12-06-2012 09:42 PM
surfmurf In response to your question:
I bought a Howards CL-110255-12;
Specs are: Int 284 deg & .510 advertised lift Exh 288 deg & 530 adv lift. See website for lift at .050.
It is installed in the engine, but the engine is not yet in the truck. Much to do before the engine goes in.

This cam was recommended to me by Howards after I gave them a full description of the 302 I was building, all tolled.

The owner, Steve Trimm, of Godwin and Singer of St. Petersburg, FL, the shop that did the machine work and assembly for me, a 40+ year mechanic and machinist and Tom, the man who actually did the machine work on my engine and assembled the engine (I had too much money in it to risk doing it myself) did things I would not have known of though I have built several automobile and a couple of submarine engines over the past 50+ years, both felt it was a very good cam. (Steve had a Howards cam case on his shelf.)

The engine is a 1969 SBC 302 (the original & best of the 302 Z-28s # 3932386), but with 3-2s and the Roller Cam Set plus some head work on the original Z heads (# 3927186). The CL means Cam and Lifters. Rockers are separate. I stayed with 1.5 ratios 'cuz I'll have a total lift of about .750 inches (a goodly bunch for a street machine). At age 73 this is my 2nd street rod.
Built a 440 cu 348 with two E series (the biggest) Carter carbs (looked like two trash cans on the engine) & a 13.5 CR with a B&M hydro and put it in my '56 Vette in the mid 60s. It was a beast, engine was TOOOOO big. That was so long ago I forgot a bunch about other than pretty-much normal street engines over all those years, so I farmed this one out. Murf
12-06-2012 01:28 PM
oldbogie
Quote:
Originally Posted by ChevroletSS View Post
Ok I am using a 94 chevy 350 roller block. Will the summit timing chain and gear work fine for this with a stock timing chain cover?? If not what cover do I need?? I really dont want a plastic one and This engine will be carbuerated.
From Summit here's a list of timing sets that work with the factory roller cam. Reade the notes carfully some work with the metal and plasic cover, some metal only, some only by shimming the cover with some extra gaskets. Many have a set up adjustment that allow the cam to be advanced or retarded to the crank. The notation 4/2 or 8/4 means the crank gear can be advanced or retarded 4 or 8 degrees which nets 2 or 4 degrees at the cam. The cam gear may also be advanced or retarded by using bushings.

Summit Racing® True Roller Timing Sets SUM-G6601 - SummitRacing.com Double row roller type chain, will not fit plastic timing cover, 4/2 degree adj
COMP Cams Magnum Double Roller Timing Sets 2136 - SummitRacing.com Double row roller type chain , will not fit stock timing cover, 4/2 degree adj
Cloyes Billet Steel Timing Sets 9-3545X9 - SummitRacing.com Double row roller type chain, will not fit stock timing cover, 8/4 degree adj
Cloyes Original True Roller Timing Sets 9-3145 - SummitRacing.com Double row roller type chain, will not fit plastic timing cover, 4/2 degree adj
COMP Cams Hi-Tech Roller Race Timing Sets 3136 - SummitRacing.com Double row roller type chain, will not fit stock timing cover, 4/2 degree adj
Summit Racing® Standard Timing Sets SUM-G6503 - SummitRacing.com Single row link type chain fits under factory covers metal and plastic, no adj.
Edelbrock Performer-Link True Roller Timing Chain Sets 7801 - SummitRacing.com Single row roller type chain, does not fit under Vortec plastic cover, 4/2 degree adj.
Milodon Premium Roller Timing Chains 15015 - SummitRacing.com Milodon double row roller type chain, does not fit under timing cover, 4/2 degree adj.
COMP Cams Keyway Adjustable Billet Timing Sets 7136 - SummitRacing.com Comp double row roller type chain, does not fit under timing cover, 8/4 degree advance retard
Cloyes Original True Roller Timing Sets 9-3145-5 - SummitRacing.com Cloyes double row roller type chain, Does not fit under plastic timing cover, 4/2 degree advance retard

I greatly caution you that you must read what timing set will fit very carefully, if it doesn't specifically say it fits a roller block then the default you must assume is that it will NOT fit a roller block.

The cam gear for a roller cam in a roller block offsets the gear teeth in a forward direction toward the front of the crankshaft. This is done to clear the thrust plate (note an OEM roller cam used in a non-roller block with a spacer where the thrust plate would have been in an OEM roller block with that cam
will also require a timing set that is used by the OEM roller cam and block).

Only a single row chain whether roller of silent link will usually fit under the factory timing cover without having to spacer the timing cover. Even then sometimes you have to double the gaskets. Consider that a double row roller chain will require careful attention to clearance.

Bogie
12-06-2012 10:12 AM
cobalt327
Quote:
Originally Posted by ChevroletSS View Post
Ok I am using a 94 chevy 350 roller block. Will the summit timing chain and gear work fine for this with a stock timing chain cover?? If not what cover do I need?? I really dont want a plastic one and This engine will be carbuerated.
Stock cover is fine.
12-06-2012 07:05 AM
ChevroletSS Ok I am using a 94 chevy 350 roller block. Will the summit timing chain and gear work fine for this with a stock timing chain cover?? If not what cover do I need?? I really dont want a plastic one and This engine will be carbuerated.
12-05-2012 10:41 AM
oldbogie
Quote:
Originally Posted by ChevroletSS View Post
Every retro part Ive seen is very expensive. Im trying to plan ahead on this build as I havent got my block back yet and go ahead with standard roller parts. Do you all think this is a good parts list to start with. My goal for HP and TQ is about 375 to 425.

Chevrolet Performance 10185071 Chevrolet Performance Hydraulic Roller Camshafts

Chevrolet Performance Hydraulic Roller Lifters 12371042 - SummitRacing.com

Scorpion Race Series Rocker Arms SCP1000BL - SummitRacing.com

Cloyes Original True Roller Timing Sets 9-3157X1 - SummitRacing.com

Edelbrock 7516 Edelbrock RPM Air-Gap Manifold

Holley 0-3310SA Holley 750 cfm 4-bbl Carburetor with Manual Choke

Proform 66945RC Proform HEI Distributor Tune-Up Kit

Vortec Valve Springs Kit 550 High Lift Hyd Flat Tappet | eBay

Hedman 68166 Hedman HTC Hi-Tech Coated Headers

Dynomax 89004 Dynomax Header and Manifold Dual Kits
The timing set must say it is for a factory roller cam, the gear configuration is different from retro-rollers and flat tappet cam blocks. The factory roller timing set has the gears reconfigured to fit the bolt-in thrust plate. Which also changes the chain, so you need the timing set of matched parts.

The OEM part for the roller cam comes in two versions one for pre 1996 (not L31 Vortec) roller cammed engines and another for the 1996 and up L31 Vortec with the plastic timing cover. All of these are usually a single row roller, there are double row roller sets, expect to have clearance problems with the timing cover from these, adding a gasket or two will usually solve this. It is best not to use a double row chain with the L31 Vortec as the timing cover often needs to be spaced forward for clearance as with the pre 96engine, but the 96 and up Vortec uses a crank position sensor in the cover which will acquire a dimensional miss-match that often affects the computer if you use the OEM fuel injection.

For examples I include these, not nearly all inclusive of what's availabe. If it doesn't say compatible with the factory roller block and cam; assume it isn't!

Summit Racing® True Roller Timing Sets SUM-G6601 - SummitRacing.com

Chevrolet Performance Timing Chain Sets 12371043 - SummitRacing.com


Bogie
12-05-2012 07:03 AM
ChevroletSS Ok thanks ill keep my options open and check around
12-05-2012 06:15 AM
SSedan64 Nothing wrong with reusing Roller Lifters & Cams, they're not like a Flat Tappet Cam & Lifter parts which shouldn't be swapped into other Engines. As long as they're in good shape, Rollers roll smoothly etc..
They're scattered all over Ebay/Craig's List etc.. cheap.
Your choice, if you've got the $$ & feel better with new parts go for it.
Howards brand are excellent parts.
12-05-2012 05:51 AM
ChevroletSS Well everything is factory machined on my block. (spider provisions drilled and tapped, machined for dogbones, and also for a mechanical fuel pump). The block number is 14093638 for future reference if anyone needs to know. So ill keep you all posted and ask more questions when I start on this build.

Again Thanks guys for everything.
12-05-2012 05:05 AM
ChevroletSS What kit did you buy???? Do you like it??
12-04-2012 05:08 PM
surfmurf I just put a Howards retro Roller Cam & Rockers in a 1969 302 with NO problems during the install. It is not in the' 55.2 pickup yet
12-03-2012 07:58 AM
ChevroletSS Thanks for the tip on Howards parts. They are priced ok. But I would be a little skeptical using used parts. Maybe the spider and dogbones but the lifters and cam Im gonna probably gonna go with new. I mean maybe I would but def not if I had to pull them out of a motor thats been sittin in a junk yard. Plus it feels great having all new parts, in my opinion
12-03-2012 07:36 AM
cdminter59
Question About A 350 Roller Setup

If not using self aligning roller rockers you will need the Scorpion roller rockers, guide plates, and hardened pushrods. I also have heard it is better to use adjustable guide plates.
12-03-2012 03:15 AM
SSedan64 The Lunati/Morel, Howards Retro Rollers are reasonably priced.
Howards, Street Retro-Fit Hyd. Roller Lifters, Chev SB-Competition Products
Howards Cams Chev SB Hydraulic Roller Kits
Lunati Chev SB Hydraulic Roller Kits

You could save a lot of $$ going with used OEM Roller Lifters, Spider, Dogbones & Cam.
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