Last week Mast Motorsports
conducted independent, third party testing on the new Weiand Street Warrior Intake Manifold for Starr Products out of Australia, the designers and manufacturers of the manifold. Testing was conducted on our SuperFlow SF-902 NSCR Engine Dyno. All testing should be independent of weather conditions as no engine was tested without immediate back to back runs. The engine was even still hot while the intake manifolds were being interchanged as the intent of the testing was to measure the effects of directly replacing a stock piece with this intake. The picture below is an LS3 equipped with the Starr/Weiand Products manifold.
The first test seen here is our LS3 crate engine. This engine is a bone stock LS3 that was pulled straight off of the crate. The engine was run on a Mast Motorsports M-90 ECM, wiring harness, and calibration
. Below is a link to our engine specs. as well as an overlay of the Starr/Weiand manifold as compared to the Stock LS3 manifold. Mast Motorsports LS3 Crate Engine
The Starr manifold makes a lot more torque in the 3100-5500 RPM range when compared to a stock LS3/L92. Additionally, we found no significant decrease in peak power on a stock engine. The only place that the Starr manifold produced less power than the stock piece was the last 300 RPM of the dyno pull. This piece should greatly improve the “driven” power range for a street oriented LS3/L92. It should also be great for LS3/L92 head Marine applications.
Next, we wanted to see the midrange gains to be had with a modified LS3/L92. The second test seen here is our LS3 HO crate engine. This engine is basically an LS3 with a more aggressive camshaft. The engine was run on a Mast Motorsports M-90 ECM, wiring harness, and calibration
. Below is a link to our engine specs. as well as an overlay of the Starr/Weiand manifold as compared to the Stock LS3 manifold. Mast Motorsports LS3 HO Crate Engine
The next test completed was a Mast Motorsports LS7 427 SS
crate engine. This engine is one of our latest releases and is a hand built LS7 with Callies crank and rods and Mahle forged pistons. It uses a ported and modified LS7 head and some really nice valvetrain pieces. A link to the full specifications of this engine can be found at the link below: Mast Motorsports LS7 427 SS Crate Engine
Though it is designed for the LS3/L92 heads, the Starr/Weiand manifold can be used on LS7 heads with the use of spacers to accommodate the differences between them and the LS3/L92 cylinder heads. Below is an overlay of the Starr/Weiand manifold and the Stock LS7 manifold.
The Starr/Weiand manifold has a significant advantage in torque until right before 6000 RPM. The peak torque number was increased approximately 35 Ft.-Lb. As a result, the peak power number was decreased by about 35 HP. This is a significant gain for a car that is going to be driven on the street. We were quite pleased with this result as the manifold wasn’t designed to be used on a big inch, high revving setup like this. It really changed the characteristics of the LS7 427 SS
Starr also offers a cathedral port manifold for older LS series engines. This is a completely different piece than the LS3/L92 manifold. The following test was conducted on a bone stock LS2. The engine was run on a Mast Motorsports M-90 ECM, wiring harness, and calibration
. We do not sell an LS2 crate engine, however, we do offer M-90 control packages that will allow you to run a crate or pullout LS2 engine. They are available with embedded wideband O2 capability with the WBO2 packages or narrow band O2 with the DBW packages. Links are included below: M-90 WBO2 Control Packages M-90 DBW Control Packages
Below is an overlay of the Starr/Weiand manifold as compared to the Stock LS2 manifold.
The data above pretty much shows that the manifold helped the LS2 everywhere in the operating range. The gains were especially significant in the midrange where as much as 30 Ft.-Lb. of torque were gained. Peak power also increased approximately 14-15 HP.
This was not the extent of our testing. Many engine combinations have been tested throughout the week, but here is a solid representation of the affects of this manifold on a few crate engines that are offered by us. Mast Motorsports
will continue to test and develop the latest LS Series engine technologies as they arrive to the aftermarket.