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  #31 (permalink)  
Old 12-06-2012, 08:05 AM
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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.

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  #32 (permalink)  
Old 12-06-2012, 11:12 AM
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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.
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  #33 (permalink)  
Old 12-06-2012, 02:28 PM
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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
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  #34 (permalink)  
Old 12-06-2012, 10:42 PM
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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
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Old 12-07-2012, 10:16 AM
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Dam roller timing covers are expensive. Im gonna go find one in a junk yard.
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  #36 (permalink)  
Old 01-21-2013, 07:24 PM
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Finally found a pic of em installed.
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