Engine casting # question...
Thread Starter
Racer
Joined: Apr 2007
Posts: 251
Likes: 0
From: Milan
Engine casting # question...
On my 69' 350 300 hp I can read this number : 14316379
I can't find it on mortec page, but here (the last ones of the page) :
http://www.nastyz28.com/sbchevy/sblock.php
where I can know only that's a 69-85 engine...
Could be the stock engine or a replacement?
I need to know it to set initial timing...
GM specification for a 69' 350 ci 300 hp are 4° as initial timing but younger engines has typically higher initial timing value...
thanks for the help!
I can't find it on mortec page, but here (the last ones of the page) :
http://www.nastyz28.com/sbchevy/sblock.php
where I can know only that's a 69-85 engine...
Could be the stock engine or a replacement?
I need to know it to set initial timing...
GM specification for a 69' 350 ci 300 hp are 4° as initial timing but younger engines has typically higher initial timing value...
thanks for the help!
Burning Brakes
Joined: Oct 2006
Posts: 1,089
Likes: 43
From: Native Californian CALIFORNIA
Army
Are you looking at the pad above the water pump? If so that is the vin that is stamped there with the build date.
The casting number of a sb is located on the top driver's side at the flange at the rear of the case for the transmission housing
For timing just set it at 36 degrees all in at 2,500 rpm's, who cares what the initial timing is.
There are so very good threads concerning this procedure.
The casting number of a sb is located on the top driver's side at the flange at the rear of the case for the transmission housing
For timing just set it at 36 degrees all in at 2,500 rpm's, who cares what the initial timing is.
There are so very good threads concerning this procedure.
Thread Starter
Racer
Joined: Apr 2007
Posts: 251
Likes: 0
From: Milan
14316379 is the casting number not the Vin and as you wrote is located on the top driver's side at the flange at the rear of the case for the transmission housing.
Yes, the total timing is much important than initial timing but I'd like to know which is the correct initial timing value for my engine...
Yes, the total timing is much important than initial timing but I'd like to know which is the correct initial timing value for my engine...
Racer
Joined: Apr 2008
Posts: 263
Likes: 4
From: Maineville OH
14016379 is a casting number corresponding to a late '79 350 corvette block.
14316379 matches include:
69-85 Truck with Two Piece Rear Main Seal
and
78-81 Pass,Malibu, Camaro,Nova with One Piece Rear Main Seal
14316379 matches include:
69-85 Truck with Two Piece Rear Main Seal
and
78-81 Pass,Malibu, Camaro,Nova with One Piece Rear Main Seal
Thread Starter
Racer
Joined: Apr 2007
Posts: 251
Likes: 0
From: Milan
http://www.nastyz28.com/sbchevy/sblock.php
as you can read in the last line 14316379 matches...
Drifting
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
Well, you now know you have a replacement block, late '79 as wolfemc sez, (and the Corvette Black Book confirms) and from the link you supplied it is a '78-'85. And while paint isn't positive proof, no '69 Corvette had a blue block.
As to timing, the 4° initial is correct for the stock engine with smog equipment, especially the AIR pump. That is an emissions setting, the small amount of advance was to dilute the intake charge to reduce hydrocarbon emissions at idle. If you don't have the stock smog equipment, you can liven the engine up significantly by following the timing suggestions found all over this forum.
Cheers,
Pete
As to timing, the 4° initial is correct for the stock engine with smog equipment, especially the AIR pump. That is an emissions setting, the small amount of advance was to dilute the intake charge to reduce hydrocarbon emissions at idle. If you don't have the stock smog equipment, you can liven the engine up significantly by following the timing suggestions found all over this forum.
Cheers,
Pete
Last edited by PeteZO6; Jul 3, 2008 at 12:38 AM. Reason: Black Book citation added
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Race Director
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Knowing the casting number will not give you any clues as to the correct ignition timing. You need to know the build configuration of the engine- cam, compression ratio, ignition curve etc.etc.
Without this you're just shooting in the dark.
Without this you're just shooting in the dark.
Thread Starter
Racer
Joined: Apr 2007
Posts: 251
Likes: 0
From: Milan
Ok, I agree...
Now I know that I've a replacement engine about ten years younger.
But I don't know anything about the build configuration and I will not surely open the engine only for setting the initial timing!
Air pump and other smog equipments are missing on my car...
So I think I will try with an higher initial timing (8-9°), but total timing is much more important so I think that the exact initial timing value will not be so decisive
Now I know that I've a replacement engine about ten years younger.
But I don't know anything about the build configuration and I will not surely open the engine only for setting the initial timing!
Air pump and other smog equipments are missing on my car...
So I think I will try with an higher initial timing (8-9°), but total timing is much more important so I think that the exact initial timing value will not be so decisive
Last edited by Dream Bikes; Jul 3, 2008 at 03:39 PM.
Drifting
Joined: May 2003
Posts: 1,634
Likes: 2
From: Melbourne, Victoria, Australia, the World
Dream bikes, you're not listening.....
IGNORE the initial timing setting. Set the timing as per Lars papers (search the forum for these) You don't have an original motor so there is no point in setting timing to Factory specs. You will get much better performance from you car if you follow Lars instructions.
IGNORE the initial timing setting. Set the timing as per Lars papers (search the forum for these) You don't have an original motor so there is no point in setting timing to Factory specs. You will get much better performance from you car if you follow Lars instructions.
