SEMA 2016: Edelbrock Offers Sneak Peek At 2650 Series Supercharger

A new line of Edelbrock E-Force superchargers built around the bigger 2650 series of Eaton rotors should be coming out in 2017.

First, a little trivia.

Can you name Edelbrock’s best-selling supercharger application for this past year?

Not a Camaro. Not a Mustang.

It was the diminutive 1.32-liter model designed for the popular RWD triplets of Subaru BRZ, Scion FR-S and Toyota GT86. That bolt-on blower added around 80 horsepower to the 2.0-liter FA20 Boxer engine and about 60 lb-ft of torque.

“It runs in cycles. The previous year it was the C7 Corvette,” says Edelbrock marketing boss Eric Blakely. “That was an interesting project because it was the first time we developed a small supercharger. We pretty much got a lock on the V8s, but there was considerable amount of testing to get the 4-cylinder blower down.”

Here is Edelbrock’s best-selling supercharger for the past year–PN 1556 that fits the Toyota GT86, Subaru BRZ and Scion FR-S.

Big engines will again be the all the rage next year as Edelbrock finishes up development work on a new line of superchargers that spin Eaton’s latest 2650 rotor assembly.

“It opens up our options to design packages for bigger displacement engines and to really shine in Stage 2 and Stage 3 applications,” says Blakely. “We’re looking at Hemi kits, late-model Mustangs and the Camaro and Vette engines.”

As the customer power demands have gone up for popular V8 engines, Edelbrock’s stalwart blower, the 2300 model, is in danger of falling out of its efficiency range. The new Eaton rotors are 15 percent larger and will push 25 percent more air at 18,000 rpm while delivering 14 pounds of boost. Best news of all, Edelbrock doesn’t have to retool the blower housings, which will help speed up the introduction of the new superchargers.

Another look at an Edelbrock prototype blower using the larger 2650 series of rotors from Eaton.

“We anticipated that larger rotors would be coming, so we originally designed in extra metal in the 2300 housings that can now be machined to accept these new rotors,” says Blakely.

The new rotors are still a 4-lobe design but now have 170 degrees of twist compared to 160 degrees on the 2300 model. The extra twist shortens the rotor lead to help maintain efficiency at higher speeds and pressure ratios. Other features include larger bearings, thicker timing gears and pressure relief ports in the bearing plate to help reduce friction. Initial testing by Edelbrock shows the 2650 can outperform competitive 2.9-liter superchargers.

“We could even go big-block with this blower,” says Blakely.

More information on new applications with the 2650 package will be coming in 2017.

Inside look at the new 4-lobe, 170-degree rotor that makes up Eaton’s upcoming 2650 series.

About the author

Mike Magda

Mike Magda is a veteran automotive writer with credits in publications such as Racecar Engineering, Hot Rod, Engine Technology International, Motor Trend, Automobile, Automotive Testing Technology and Professional Motorsport World.
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