My 631HP Hilborne intake ls3 on the Dyno

[kabacj]

Last year at SEMA I had the pleasure of meeting with Horace Mast and his team. We discussed the motor I wanted to build and agreed to work together to make it happen. These guys are top notch. They apply both science and art into building some killer power and reliability. They were really stoked about how the motor came out and recorded the dyno pulls of my motor. I just love how the Hilborne carbs look, sound, and perform. Mast have developed a fully drive by wire Hilborne setup that combines the best of the old and new school I think.

Like everything these days its all in the software and Mast Motorsports both have their own ECU and software to manage it.

I am super happy the result. I just love hearing the motor run. You will notice that the throttle is fully computer controlled during the dyno run stepping up through the rev range then back down.

Anyway I thought you guys would like to hear the motor run.


http://www.youtube.com/watch?v=oy0UQOIi6QE&feature=youtu.be



John

[sk7500]

That sounds awesome!!! Bet you cant wait until that's 6in behind your right elbow

[kabacj]

That sounds awesome!!! Bet you cant wait until that's 6in behind your right elbow

Thanks. I cant wait to hear it with the kooks exhaust. Every free moment is going into the car these days so I can hear it run in person.

John

[riptide motorsport]

Sweet!!!!!!!!!!

[timmy318]

GTM... Definitely the next car I build after the 818 with a motor like like!!!! Amazing btw, just plain amazing. Good luck on your build and keep us updated!

[flotowngtm]

John,

I was just reading a article in Engine Swaps summer 2012 issue. Its about the Nascar series in Brazil. All teams are given a car built by the same builder and 2 Mast MotorSports 416ci LS3 motors for the entire season. That's probably very closely related to your engine. Everyone is running the same motor so I am sure it makes for some interesting racing. The cars run a 12 race season at 2800 miles. And the car's interesting enough weighs in at 2800lbs. Very close to what your car will weigh. With them only having one spare motor for the entire season it really shows how bullet proof the motor is. Here in the US I dont think a motor runs but one race and then its a total rebuild. I am sure your going to be very pleased with it.

Now lets paint a number on the side of your car and take a little trip!

[crash]

Great HP number.

The LS3 really shines when you up the cubes a bit!

Flotown-Just to put it into perspective, we run ~2500 miles in 25 hours NON-STOP for the 25 hours of Thunderhill. So we do roughly an entire season of racing in ONE DAY!

That fact always astounds me.

:)

[kabacj]

Great HP number.

The LS3 really shines when you up the cubes a bit!

Flotown-Just to put it into perspective, we run ~2500 miles in 25 hours NON-STOP for the 25 hours of Thunderhill. So we do roughly an entire season of racing in ONE DAY!

That fact always astounds me.

:)


Crash, No dobut the 25 hour is a torture test and the fact that a stock crate motor can take the punishment for so long without failure is really somthing.

As you know once the HP goes up then you need to start addressing the next weakest link.

Since Mast have a proven formula and done all the work to address the top end, bottom end, oiling and oil control, even cooling i figured they know much more then i ever will about what it takes to make an LS last. They also have built hundreds and hundreds of motors.

Flowtown, that is really interesting about the Brazilian NASCAR series and that Mast are suppling engines. I am game to get out there with the GTM. I have the right motor, and I have driven on a circle track. How hard could it be.

John

[crash]

There is no doubt that Mast builds some quality stuff. I've seen it already with others.

I think you will be very happy with what you ended up with.

[kabacj]

I plan to have two configurations for my intake. Open to the engine compartment for normal tooling around town and with a full airbox for track duty.

I love aerodynamics and wanted to learn about both the bellmouth intake and how close I can get the airbox to the bellmouth itakes without having a negative impact.

I found this great article written by engineers and their theories are actually backed up by testing. Lots of cool pictures even if you dont care to read the engineering facts.

http://www.profblairandassociates.com/pdfs/RET_Bellmouth_Sept.pdf