Im looking for the factory specs. on the 1963 327 FI.Motor (Lift-Duration @.050-Lobe Seperation and Intake Center Line. I also need the head gasket thickness. Thanks Mario.
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Re: 63 327 fuelie motor
I can give you a web page with cam specs but Duke will tell you they are all wrong. The problem is these listed are from various Chevrolet sources mainly and some aftermarket sources, and list what was stated at the time. Since then, Duke has physically measured many and has different specs.
Also, Chevrolet used long ramps in their specs and no one was using the .050 lift requirement. And the page uses some assumptions, as noted in the footnotes, on some measurements as they are simply estimations.
So if you want published and/or estimations, go to the web page.
If you want actual, ping Duke on here.
Corvette Cam Specs -
Re: 63 327 fulie motor
The OE '63 SHP/FI cam is the Duntov. Duration at .050" lifter rise above the tops of the clearance ramps (which is the data to compare with a hydraulic lifter cam) is 220/220, centerlines 108/112, and from that you can easily compute the LSA from inspection.
The Duntov cam was designed in 1956 when ports and valves were smaller than later engines, and it really doesn't work very well on 327s with 461 and later big port heads, which need more lift. Contrary to it's official name of "high lift cam", it really has low lift.
I recommend the LT-1 cam, 231/239, 110/122 to replace all mechanical lifter cams on 327s. The 30-30 cam 239/239 110/118 is too big for a good road engine.
A recently restored '65 L-76 with massaged heads, LT-1 cam, and improved connecting rods tested on a chassis dyno yielded 80 percent torque bandwidth of 2100-6750, 90 percent from 2450 to 6100, peak power at 6500 and useable revs to 7200. It doesn't get much better than that.
FI on this same longblock will shift the torque bandwidths up the rev scale a few hundred revs due to the single plane manifold architecture and more efficient runners, so useable revs will likely extend to about 7500 with some loss of low end torque.
Your engine was originally built with two .018" shim gaskets to cut the CR. With typical deck height and and a compostion gasket, the actual CR should come in at no more than 10.5, which is okay with current pump premium and the LT-1 cam, however, deck height (and head cc too if they are modified or milled) must be measured very carefully so a proper thickness head gasket can be chosen to bring the CR in somewhere in the range of 10.25 to 10.5.
With the OE Duntov cam I recommend 10.25 max.
I also highly recommend staying away from aftermarket cams. For a given duration they all have more overlap than the OE cams and the OE cams already have too much. Aftermarket cams are a recipe for poor torque bandwidth, and if hydraulic type they limit the rev range. A properly system engineered SHP/FI 327 has a very nice combination of torque and revs, and it needs a mechanical lifter cam to exploit all the useable revs.
Also, in case you don't read this forum much, high revving 327s need better than OE quality connecting rods, which are weak and a failure waiting to happen. Many 870 blocks have been destroyed over the years when an OE connecting rod let go. The rods are the weak link in the cranktrain. With the Crower Sportsman rods I recommend and a straight, crank free SHP/FI crank that has not been turned down, which removes the surface Tufftriding treatment, the bottom end is good to 8000.
DukeComment
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Re: 63 327 fulie motor
Mario, I can't give you an elaborate answer like Duke but his is what my customers use. Speed Pro CS 113R Sealed Power by Federal Mogul. Works quite nice in a 57 to 63 HP car. Used it in my 63 FI car and it has lots of vacuum. AT 2000 RPM it puts out about 18.5-19 inches. AT 1000 it puts out over 14 inches. Didn't check lower RPM. 100's of my customers have used this cam with great success and it's readily available. Here is the history of the cam. Started off life as the old TRW TP113 cam. Well TRW was bought out by Sealed power so it became CS113R. Then sealed Power taken over by Federal Mogul, etc. Lifters are AT992 which are decent lifters but there are better lifters. We used them in my 63 and it runs really nice. Stay away from the 30-30 in the 63 as you will be disappointed-just like Duke said. I would say this Speed Pro cam is a shade milder than the original. Or you can hunt for the original cam 3736097 but be careful. Some errors were made and you don't always get the right stick in the correct tube. Look for 6098 on the cam. Then you should be safe. In the olden days all my friends and engine builders used the TRW cam because it was 1/2 the cost of the real deal. Don't play around with the cam or you will be disappointed. FI's love vacuum. Take it away and they aren't worth crap. JohnComment
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