Factory cam?
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
HO is 300 HP 1968 corvette engine with TH trans. Likely a 3.08 gear. This is a 10 to 1 comp engine with Iron heads. Your in that situation that your compression needs a bigger cam and your trans and rear end call for a smaller cam. Use this. Crane does not have the ground in advance of most and will handle more compression. The duration matches your RPM needed for city driving with your gearing. http://www.summitracing.com/parts/cr...make/chevrolet
You likely have had modifications, repairs, rebuilds done so it is hard to tell your compression and rear ratio now but this cam should be sweet and safe.
You likely have had modifications, repairs, rebuilds done so it is hard to tell your compression and rear ratio now but this cam should be sweet and safe.
Last edited by 63mako; Oct 1, 2013 at 10:31 PM.
Thread Starter
8th Gear
Joined: Jul 2007
Posts: 8
Likes: 0
HO is 300 HP 1968 corvette engine with TH trans. Likely a 3.08 gear. This is a 10 to 1 comp engine with Iron heads. Your in that situation that your compression needs a bigger cam and your trans and rear end call for a smaller cam. Use this. Crane does not have the ground in advance of most and will handle more compression. The duration matches your RPM needed for city driving with your gearing. http://www.summitracing.com/parts/cr...make/chevrolet
You likely have had modifications, repairs, rebuilds done so it is hard to tell your compression and rear ratio now but this cam should be sweet and safe.
You likely have had modifications, repairs, rebuilds done so it is hard to tell your compression and rear ratio now but this cam should be sweet and safe.
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
No. The same heads were used on 300 and 350 hp 327s. Camel hump usually means bigger valves compared to other small block heads of the period.
Sapple89: HO indicates the base 300hp 68 327 with automatic transmission (TH400). If you found the engine stamp on the pad, it's likely the VIN derivitive is also there. Worth going back and looking for the second stamp.
Sapple89: HO indicates the base 300hp 68 327 with automatic transmission (TH400). If you found the engine stamp on the pad, it's likely the VIN derivitive is also there. Worth going back and looking for the second stamp.
Last edited by Easy Mike; Oct 2, 2013 at 09:36 AM.
Burning Brakes
Joined: Dec 2010
Posts: 848
Likes: 60
From: CA
Would that mean that it is unlikely to be an L79 or L46 as they would have 4-bolt mains?
Camel hump usually means bigger valves compared to other small block heads of the period.
Ed
Last edited by restoman1; Oct 2, 2013 at 09:50 AM.
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Pro
Joined: Oct 2009
Posts: 664
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From: Marysville Ohio
sapple89 - 63mako gives some very solid recommendations on camshaft choices - he gave me one for my 406 build - took me forever and a day to get the motors swapped, but now that I have, could not be happier with the engine. The power band is where I wanted it, and it's got the torque and power where I need it. Would not hesitate to follow his guidance.
Thread Starter
8th Gear
Joined: Jul 2007
Posts: 8
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Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Burning Brakes
Joined: Dec 2010
Posts: 848
Likes: 60
From: CA
The engine suffux code was stamped at the engine assembly plant and the partial VIN was stamped at the car assembly plant right before the engine was mated with the car. There should be another stamp on the front pad where you found the suffix code. Something like 18S123456 (as an example).
HERE'S a picture showing where to look.
Ed
HERE'S a picture showing where to look.
Ed
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
There is another way
you can get a bore scope camera from harbor freight and remove a plug. If you can determine if you have flat top pistons or domed it will make your cam choice easier.
I think you can get the bore scope for a little over $100 with the 20% off coupon.
you can get a bore scope camera from harbor freight and remove a plug. If you can determine if you have flat top pistons or domed it will make your cam choice easier.I think you can get the bore scope for a little over $100 with the 20% off coupon.