1018? And what you already know an obvious tram issue if your getting a step at each pass. Not one of the better grades of steel that are known for producing easy to get good surface finishes since it looks like the surface is showing some tearing. Maybe a few combined issues from what I see Glenn. Here’s a pic of the raised surface area, with a finish recut over the top.Ĭan anybody advise the most likely avenues to examine for finish and DOC problems with a fly cutter? Speed around 250-300 RPM, very slow feed rate. Power feeds on the table, all around.īTW, I ground and polished the tooling edges just prior to using the fly cutter. Still has scrapping on the ways, all around. The mill is A NOS Bridgeport clone built in 1980, but in still in excellent shape, having been used lightly by a hobbyist since new. Also will take a photo of the tool tip and post) Ron’s tramping thread from a few days ago- going to go recheck my alignment on the machine with the comments people offered. I assume this a tram problem, but why would it suddenly materialize. 0005” or so and leaves it like it was hit with 60 sand paper. It’s as if the cutter scratches the back side. But the back side of the cut started leaving a rough surface, half way through the job. The cutter bit cuts a smooth finish on the front side of the cut. The edge appears as a line running right to left.ģ) finally, I tramed the quill but still end up with a rough surface on one axis. You can sort of see the raised area on the left side of the photos- middle of the board. It’s almost as if the work pice is controlling the DOC, rather than the mill. 008” DOC actually left a noticeable raised area over one half the path of the cut. Intake modification is essential if you are considering adding additional cubic inches to your 8.1L engine.I’ve been trying to level and finish surface a 6” x 10” bit of 1” plate to use as a base for a shop made tapping fixture.ĭecided to try a 2.5” fly cutter that’s been laying around in my tooling cabinet for a couple of years.ġ) each finish pass (.003” doc) leaves a little bit of edge overlap on the sides -I can feel the lip with my thumb.Ģ) one fairly deep finish pass- maybe. Intake manifold modification will show gains throughout the low to midrange RPM band. Intake manifold modification does not replace the GEN7R manifold but does offer about 70% as much airflow. We remove the stock plenum blockages inside the manifold to reduce restriction and free up horsepower and smooth the individual intake runners. This intake modification will increase airflow to your big block vortec engine and still retain stock looks and passes emissions. Vortec 8.1L Intake Manifold Modification Intake Manifold Modification - $1350įor big block 8.1 liter engines not requiring maximum high-RPM airflow, we can modify your stock 496 / 8.1 liter intake manifold. In the image above, you can see the additional valve relief clearance which has been built into our pistons for our high-lift series of camshafts. Our high-lift kits come with fully forged components, ensuring maximum reliability and performance. We routinely see engines with cracked, chipped and even shattered pistons which result in catastrophic engine damage. The stock Vortec 8.1L cast pistons are not designed to withstand the forces of extreme endurance use. Stroker Kit Overview Vortec 8100 / 8.1L 496cid Pistons > High Strength Main / Rods / Cam Bearings Kit.> High Strength Main / Rods Bearings Kit.4 3/8 Standard Stroke Forged Flycut Pistons.Piston prices may vary depending on application. These pistons are capable of horsepower levels of over 800 HP without any fear of mechanical damage. These new pistons will allow our customers to rebuild and upgrade the strength of their 496-8.1 engines. Our new forged pistons are available in standard bore. Raylar’s proprietary alloys will allow this piston to run tighter skirt to cylinder wall clearances to help eliminate piston slap noise while providing long life and extra strength. These forged pistons incorporate a special hard anodizing and skirt coating system that will allow these pistons to provide even more durability and reduce friction. This is especially important in high horsepower, high-RPM or supercharged applications. Replace your weak, cast factory pistons with Raylar’s proprietary forged piston and ring packages for the Vortec 8100 8.1Liter 496.
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