Can an LS engine be carbureted?

In LS swaps or street/strip/race cars a carbureted LS is simple and less expensive. MSD’s 6LS ignition control only requires connections for the coils, crank sensor, MAP sensor, and the camshaft sensor. This is a great unit for those using a carburetor on their LS engine.

What kind of carburetor do I need for a race engine?

Most rebuilt street engines with average bolt-ons have a volumetric efficiency of about 85%, while race engines can range from 95% up to 110%. Even with about a 10% cushion, a 500 CFM carburetor will handle this engine great.

What kind of CARB do I need for a 400 hp engine?

Here is what they learned. Edelbrock air gap dual plane intake. A better than average 400 HP street performance engine. The test was four Holley XP series carbs, 650, 750, 850 and 950 CFM. Now this series of dyno pulls was on the Westech Performance dyno.

What kind of carburetor do I need for a 500 CFM engine?

Even with about a 10% cushion, a 500 CFM carburetor will handle this engine great. If you try this formula yourself, be honest with how much rpm the engine will see. You’d be better off with a carb smaller than needed rather than something oversized that can lead to poor drivability and performance.

How to calculate the size of a carburetor?

The engine’s volumetric efficiency is a measurable value and with a correctly matched carburetor, you will improve the performance of your engine. The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456.

Can you add cubic inches to an 8.1L engine?

Intake modification is essential if you are considering adding additional cubic inches to your 8.1L engine. Our billet aluminum EFI stack inection intake manifold is the same induction system we use on the 632cid H0750.

Is the 8.1 liter intake manifold designed for high RPM?

The stock 8.1 liter intake manifold was designed for low RPM use and cannot meet the high-RPM air flow demands of the 496 / 8.1 liter engine in performance applications. Our Cool Gap intake manifold has been engineered for one purpose, maximum airflow and power output.

Is the 8.1L V-8 a good engine?

The 8.1L V-8 is known for many things, however fuel economy is not one of them and the engine has a tendency to guzzle fuel at a high rate.

What kind of horsepower does a GMC 8.1L have?

The engine peaked at 340 horsepower and 455 lb-ft during its 6 year stint as the biggest engine option for 2500HD and 3500HD models from Chevrolet and GMC. For a gas engine, the 8.1L displays an impressively flat torque curve, coming on strong in the 1,200 to 1,400 RPM range and finally tapering off below 400 lb-ft just after 4,000 RPM.