Port matching is required for best results. These intake manifolds are designed to perform right out-of-the-box with minimum modifications, but can still be ported as needed. They have the same outer dimensions as the Big Victor High-Rise, but also have an extended runner design, carb pad and plenum for increased air flow and performance in large displacement race engines. Big Victor 2 intake manifolds go one step further. As needed, Printoseal ® elastomeric sealing beads are used to provide the extra sealing. Now in testing the Performer RPM-O didnt score nearly as well in peak horse power in a recent dyno test on a 454 HO test mule when compared with Edelbrocks RPM Air-Gap 2-O (1500-6500. The base gasket material resists coolant, gasoline, alcohol and oil. The BowTie intake that ships on all the BBC crate engines from GMPP is the Edelbrock Performer RPM-O (1500-6500 rpm) rebranded and gasket matched to the heads. This gives engine builders the extra material they need to apply custom porting without welding. Most Fel-Pro ® Performance intake manifold gaskets are designed without a metal core, to allow engine builders to trim the gasket for exact fit on modified ports. The casting has added material on the top of the runner and exterior area of the carb pad. Big Victor High-Rise intake manifolds are based on our popular Big Victor designs, but have been modified to meet the needs of custom porting specialists. These features, combined with approximately 5% taper in runner crosssectional area, give better top end hp while maintaining consistency and throttle response off the stop.
The outside runners are shorter and straighter than competitor's manifolds and the plenum is longer front to back. 500" from the plenum to the exit allowing the popular oval port shape to be used.
The runners have a minimum corner radius of. 090" per side reduction to accommodate the wide variety of intake port sizes and require port matching. I biased the gaskets as low as I could on the bolt holes to give the maximum sealing surface on the top of the port rim, than added a dab of RTV on each of the bolts I JB welded up.BIG VICTOR SPREAD-PORT (3500-8500 RPM) Designed for large CI or high rpm drag racing big-blocks with Edelbrock Big Victor, Dart Big Chief or Brodix Big Duke cylinder heads, these manifolds have an average runner area of approximately 4.75 sq. (Still larger than the head ports by a touch.Ĥ.
#Bbc intake manifold free
Take advantage of free shipping on orders over 99 Youve Selected: Air and Fuel Delivery Intake Manifold Intake Manifolds Chevy Big Block V8 454 Chevy Big Block V8. I ended up using the AFR 6855 gaskets that don't have the extra bolt holes, however the port size is a little smaller than the fel-pros. Shop for 454 V8 Chevy Big Block intake manifolds from Speedway Motors. I found the extra bolt gaskets matched the manifold nicely with lots of sealing surface, however the bridge area would overhang the port in the head and not seal. I picked up gaskets with the extra bolt holes and without, similar to Scotts photo.ģ. I bought 3 different gaskets sets from from summit (Beauty of having Summit just down the street) and compared the ports to the manifold and the heads. I see 'ThatGuy' suggested the same, it worked well.Ģ. I taped the bottom of the manifold bolts and filled the extra holes with JB weld, this made the bottom sealing surface flush. That overlay picture was pretty insightful.
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