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Old 12-06-2012, 01:28 PM
oldbogie oldbogie is offline
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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.
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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