Weiand Street Warrior Intake Independent Engine Dyno Testing By Mast Motorsports

[MastMotorsports]

As some of you know, Starr Products out of Australia is developing a cathdral port as well as an L92/LS3 intake manifold. I posted this on some other forums as well, but it should be of interest here since it makes good midrange torque...Enjoy!

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.

https://static1.pt-content.com/images/pt/2008/09/Picture021-1.jpg
https://static1.pt-content.com/images/pt/2008/09/Picture028-1.jpg
https://static1.pt-content.com/images/pt/2008/09/Picture026-1.jpg

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.

http://www.mastmotorsports.com/gascrate.php (http://www.mastmotorsports.com/gascrate.php)


https://static1.pt-content.com/images/pt/2008/09/LS3_GM_62L-1.jpg

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.


http://www.mastmotorsports.com/gascrate.php (http://www.mastmotorsports.com/gascrate.php)


https://static1.pt-content.com/images/pt/2008/09/MastLS3HO-1.jpg
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:


http://www.mastmotorsports.com/gascrate.php (http://www.mastmotorsports.com/gascrate.php)

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 it and the LS3/L92 cylinder heads. Below is an overlay of the Starr/Weiand manifold and the Stock LS7 manifold.

https://static1.pt-content.com/images/pt/2008/09/MastLS7427SS-1.jpg

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 of the components used during testing are listed below:

http://www.mastmotorsports.com/page.php?Category=Fuel%20Injection&Section=M-90%20Control%20Packages&id=67 (http://www.mastmotorsports.com/page.php?Category=Fuel%20Injection&Section=M-90%20Control%20Packages&id=67)

http://www.mastmotorsports.com/page.php?Category=Fuel%20Injection&Section=M-90%20Control%20Packages&id=66 (http://www.mastmotorsports.com/page.php?Category=Fuel%20Injection&Section=M-90%20Control%20Packages&id=66)

Below is an overlay of the Starr/Weiand manifold as compared to the Stock LS2 manifold.

https://static1.pt-content.com/images/pt/2008/09/LS2_GM_60L-1.jpg

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.

https://static1.pt-content.com/images/pt/2008/09/Picture039-1.jpg

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.

[oestek]

Nice data! This used the same calibration with each manifold, right? Have you been able to tune with the Warrior to see more / different power?

[DarkoNova]

That is a RIDICULOUS torque increase on the LS2. :eek:

Looks like an awesome manifold.

Matt

[cdoggy81]

Great results! How does the LS3 compare to the LS2??? This should rock on the LS2 as the stock one is garbage.
Any word on the LS1 version? I would love to see a head to head against a LS6 intake & FAST90 or 92!!! :)

[MastMotorsports]

Nice data! This used the same calibration with each manifold, right? Have you been able to tune with the Warrior to see more / different power?

Kevin,

Same calibration except for the VE table. The only thing that we did other than swap the intake manifold is adjust our VE table to compensate for the airflow differences and maintain the same A/F Ratio. Personally, I think that this is going to be a great upgrade for guys who are spending most of their time driving on the street.

[MastMotorsports]

Great results! How does the LS3 compare to the LS2??? This should rock on the LS2 as the stock one is garbage.
Any word on the LS1 version? I would love to see a head to head against a LS6 intake & FAST90 or 92!!! :)

Are you talking about comparison between the manifolds or engines? The manifolds look similar since they are made from the same process. They are visually different, but the general layout is the same.

If you are talking about the engines themselves, as far as the engines go, the LS3 is head and shoulders above LS2. We actually only do cathedral port engines (LS1,LS6,LS2) on customer request since the newer L92/LS3 rectangular port engines are so much better. We pretty much consider cathedral ports old hat or a thing of the past. It hasn't happened completely quite yet, but everyone will eventually realize the great value or HP/dollar of the L92/LS3 engines.

[cdoggy81]

Yes, I was talking about the manifolds (we all know the LS1 manifold ok, LS6 manifold good, LS2 manifold not so good).
Any word on the cathedral port version of this intake for the LS1,LS6,LS2???

[DarkoNova]

I think he's asking how this compares to the FAST 90 or 92 since those are generally believed to be the best intakes for LS1's.

Matt

[BossaNova]

Hey! What ever happened to this thread?

Is this the intake:

http://www.jegs.com/p/Weiand/1087690/10002/-1

[cdoggy81]

Yep, that is the intake. We shall see on that ship date... Last time I checked the machine was STILL down :(

[MastMotorsports]

I think that is the intake for the cathedral port heads. Whenever we did this test we were told that the cathedral port head intake would come out before the L92/LS3 head intake.

[cdoggy81]

Yep, I think you are right. They have been saying that same thing for a LONG time...

I had a nice time sitting down & talking with you & Kyle Tucker in Orlando. Wish I had more time to chat but there were a lot of people/things to see at the PRI show :)

[MastMotorsports]

Yep, I think you are right. They have been saying that same thing for a LONG time...

I had a nice time sitting down & talking with you & Kyle Tucker in Orlando. Wish I had more time to chat but there were a lot of people/things to see at the PRI show :)

Me too. All waiting aside, I think that this intake will be a good choice for a street car.

[BossaNova]

Bring it on!


me too. All waiting aside, i think that this intake will be a good choice for a street car.

[BossaNova]

Well lookie here. Another promised intake to torment us guys with rectangular port heads:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=CCA%2D146102&N=700+115&autoview=sku

[Steve1968LS2]

I'm growing old waiting for that intake.. would love to use it on my Track Rat engine and in the story/dyno test.

:(

[MastMotorsports]

Steve,

Shoot me an email with what you have going for the powetrain on your current project. We have some parts that we haven't released yet that may be of interest to you.

Thanks,