Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum. Carb recommendations: Edelbrock AVS2 or Performer Series 500 cfm Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant #1076, DO NOT USE END SEALS GASKETS. For more information, visit Basic Operating RPM Range WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. Designed for use with Edelbrock Marine Series 600 cfm carb, it accepts late model water neck, alternator, HEI and air conditioning. This marine intake has provisions for external water bypass and may be used on either Vortec blocks or 1995 and earlier blocks. Tech / General Engine - Vortec Intake Manifold choices - I will hopefully be having a 350 Vortec built for me here shortly to replace the tired 350 that. With this Marine manifold, boaters can take advantage of the higher flow available with the Vortec head design. (3.8L and 4.3L) V6 engines with Vortec heads. This dual-plane intake is designed for the engine swap market utilizing 1985 and later Chevy 200-229-262 c.i.d. Non-EGR DETAILSĮdelbrock part #2519 Performer Vortec V6 Marine Intake Manifold is based on the powerful Edelbrock #2111. Accepts Q-jet or 4150-Style Square-Bore Marine Carbs. Cooling Water Passages are Lined with Brass to Prevent Corrosion. Look as good as new as well and you would not be disappointed.Edelbrock Marine Vortec V6 4.3 Intake Manifold for Chevy 4.3L V6 Marine Engines w/Vortec Style Cylinder Heads. I have gotten several of these direct from holley off of ebay and they are basically brand new carbs. Honest the best bang for your buck I will list below. You can change out the fuel restrictors in the metering blocks but don't recommend you don't mess with these things unless your fully educated on how a holley style carb works on each of its circuit etc. When to consider replacing the intake manifold gasket: Internal or external leaks. The intake manifold must be tightly sealed to the cylinder head (s) using a gasket in order to prevent air, oil, or engine coolant leaks. The demon series of carbs have a very rich idle fuel curve compared to the ones listed above and any of the ones above would give you better fuel mileage unless you know how to tune your fuel curve on your demon as it can be set up to run just as well. The lower intake manifold is a cast aluminum or molded plastic chamber bolted to the cylinder head of the engine. I had my engine sold as it had seen better days but for that short time it ran good and would do with any of these carbs listed above. I had a bone stock 350 vortec in my 96 s10 when I got it back in 2007 and it had a edelbrock vortec intake on it along with a edelbrock 600 cfm carb and it ran pretty well with that combo and still could shred the tires if I wanted to with a 700r4. Third is the Edelbrock afb 600cfm carb with either the electric choke or manual choke depending on what you want and also the edelbrock avs 650cfm carburetor. The aluminum intake manifold for the 7th generation big block chevy is engineered to maximize the horsepower and torque levels of the 496 / 8.1 liter vortec. Your two best choices are either a stock holley 600cfm vacuum secondary carb model 1850 (manual choke) 80457 (electric choke) if they end in the s then they are the zinc heavy castings and if they end in sa then they are the aluminum lighter castings. Then if you want either of these carbs then I would get a square bore intake. Free shipping when your order includes this. The quadratjet is the best for fuel economy wise but you will need a spread bore intake manifold in order to use it. Speedmaster 1-147-004 SBC LowRise Vortec Intake Manifold, Satin made by Speedmaster, for as low as 222.60. On the whole, we found this device highly efficient with a suitable rpm range and improved torque value. First of all, this Edelbrock 2701 intake manifold is best known for its superior construction quality, high functionality, and square-bore carburetors. Speedmaster Hi-Rise Vortec Intake Manifolds 1-147-034 Intake Manifold, Hi Rise Vortec, Single Plane, Aluminum, Natural, 4-barrel Square Bore, Chevy, 5.0L, 5.7L, Each Part Number: SDM-1-147-034 ( 4 ) Estimated Ship Date: Today Free Shipping 294. If your vortec is all stock then I would either use one of three carbs and this will indicate on what intake manifold you use. Edelbrock 2701 Performer Intake Manifold.
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