timing chain instalation question
Thread Starter
Instructor
Joined: May 2009
Posts: 243
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From: salisbury missouri
timing chain instalation question
im putting together a new engine for my 80 and the timing chain has 3 key slots for the crank gear.
im using a 1986 block with a one-piece rear seal,going back carburation like stock.
I know i dont want to retard the engine with this timing gear set,but is there an advantage on advancing it through this timing set?
like i said the engine came out of a 1986 corvette,and is stock with quadrajet carburation.
THANKS FOR THE ADVICE killer454
im using a 1986 block with a one-piece rear seal,going back carburation like stock.
I know i dont want to retard the engine with this timing gear set,but is there an advantage on advancing it through this timing set?
like i said the engine came out of a 1986 corvette,and is stock with quadrajet carburation.
THANKS FOR THE ADVICE killer454
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Usually:
triangle is 4* cam advance: improved low-mid rpm performance.
circle/dot/zero is "straight-up": OEM performance.
square is 4* cam retard: improved mid-hi rpm performance.
Always:
You don't get something for nothing; everything's a tradeoff.
Don't discount either setup; each is valid for specific application.
triangle is 4* cam advance: improved low-mid rpm performance.
circle/dot/zero is "straight-up": OEM performance.
square is 4* cam retard: improved mid-hi rpm performance.
Always:
You don't get something for nothing; everything's a tradeoff.
Don't discount either setup; each is valid for specific application.
Last edited by jackson; Jun 8, 2009 at 01:28 PM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Seems that's an L98 motor.
those slots are "keyways".
the key is a "woodruff key".
Last edited by jackson; Jun 8, 2009 at 02:59 PM.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
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From: Seattle WA
St. Jude Donor '14
with jackson. Generally, today's cams have the appropriate advance ground in. Advancing or retarding is not rebuild 101 stuff - the big change is where in the RPM range the engine makes power, but there are a number of side effects as well. Pick the right cam and install it straight up
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
And PLEASE don't install it anyplace but straight up without checking piston to valve clearance. Unless you're 100% positive you have loads of clearance. One way makes the intake valves closer the other way does the exhaust.
Thread Starter
Instructor
Joined: May 2009
Posts: 243
Likes: 0
From: salisbury missouri
Thanks for the help everyone
I just got done installing it at factory position (circle to circle)this is the best forum,i dont mess with anyother but this one.
thanks again for the help
I just got done installing it at factory position (circle to circle)this is the best forum,i dont mess with anyother but this one.
thanks again for the help
