For those of you sitting on the fence regarding the Halltech Super Bee MF103, you might want to consider this. Katech Engine Development, their Performance Division dynoed the Super Bee last year on one of their 606 HP Street Attack motors. The stock GM LS7 intake was used for the A test, which netted the 606 HP; with just the addition of the Super Bee, the numbers jumped to 623 HP (+17 HP).

As most of you know the Katech reputation and Dyno Cell #2 is the same dyno cell used by Katech for most of their LS7 testing for GM back in 2005. There are no computers that can ruin a dyno pull by pulling timing or throwing pig rich air fuel ratios at the burn to reduce CAT temps, just the best power for each unit. The MEFI fuel system works in conjunction with Lambda sensors that show the amount of fuel needed to make best power for each modification, which keeps computer safety protocol out of the picture, and bias toward stock, since the factory air fuel ratio is between .76 lambda and .79 lambda (11.2:1 to 11.5:1) not the .87 to .89 that makes best power on the dyno.

What can you expect on the LS3 without tuning? The factory air fuel ratio will remain very close to the fat air fuel ratio above, which does not allow full power with the factory intake or the Super Bee MF103. The power from lower resistance to flow is only half of the power that the MF103 could make, getting the air fuel ratios into the low 12.3 to 12.5 range will bring another 10 or so RWHP. Tuning, however, does bring the risk of warranty issues, but that is rare, since a good tuner, does not mess with areas that could potentially cause issues.

Tuning is not required or necessary with our intakes, meaning lean codes and other problems will not present themselves, but tuning for leaner air fuel ratios will really wake up the LS3.

Bolt on rear wheel horsepower should show 10 to 12, possibly a couple more if the chassis dyno does not cause the O2 sensors to overheat which will bring the air fuel ratio into the 9s.

We have watched O2 temps on the road, in the real world, and they rarely if ever get into the first of three Cat Over Temp Protection temps which will puke fuel into the intake up to 20.5% to cool down the cats.


Jim

 

Jim, I seem to recall you posted a note awhile back about recommending to cut or open up the side (not bottom front) of the fan shroud for an LS3 (non GS) to prevent surging and creating cold air. If the location on the side is high enough that should minimize rain ingestion? Any chance of posting up an illustration? Looks like a real nice intake combo. thanks, - Bob

 

Once again that is VERY impressive.
Any before & after 1/4 mile times from that car?

With a 17hp gain (at the crank) that should be a solid full tenth reduction and roughly 1mph gain in the 1/4 mile.

 

http://www.corvettels7.com/Instructi...iveInstall.pdf
Here are the basic instructions. Our testing has shown that even without these ports the LS3 (non GS) runs ambient +1 to 5 degrees with the Beehive installed:

 

Same LS3 before and after the Halltech vs. Vararam matched the VR 1/4 mile speed and e.t. It should have done better, but the bottom of the radiator shroud was still open due to the VR uninstall hole, which is not conducive to ram air with the Beehive onboard. Our vents must have no other holes in the shroud to work. The customer felt that the DA changing most of the day made it very difficult to declare a winner, except on the dyno. At least it was a tie at the track.

Here was the dyno results, done by the same customer, same day, same dyno:

 

Hey Mark how are you!! My ZO6 is going to Cartek Saturday morning for the stage 3 cam package and I am providing Julio with the KB CF112 in lieu of the Vararam. You'll see it on my car first hand...

 

About ready to pull the trigger on a superbee for my '11 C6. Any forum vendors have any deals?

 

Get it directly from Halltech!

 

Our first chassis dyno done by Lucky's Speed is in on a virgin stock LS3, with JUST the Super Bee MF103 bolt on. Then tuning afterward, which only net 3 more RWHP.

In my first post above, I predicted this:
Here is Jason's email to me this morning and the dyno:


Jim,
We have concluded our initial testing with the new Halltech SBMF103. I have attached several dyno sheets for your review. Please refer to the file name for the accurate description. Testing Details as follows:

Test Vehicle:
2010 C6 Corvette
Base Model LS3 w/ Bi-Modal Sport Exhaust
A6 - six-speed Automatic
2.56 Rear End Gear Ratio

Modifications as Tested:
HRE Wheels - 19" Wheels Front & Rear
Otherwise Stock

Run conditions:
96 degrees Fahrenheit
23% Humidity

Testing as follows:
Two dyno runs in stock configuration
Install Halltech SBMF103 while still strapped down - process was no more than 10 minutes - NO TUNING performed
Two dyno runs with SBMF103 installed - no other changes

Results:
Stock Dyno Peak HP: 360.99
Stock Dyno Peak Tq: 360.23
MF103 Dyno Peak HP: 371.67
MF103 Dyno Peak Tq: 367.70
Peak Gains: +11 HP / 7.5 Tq

Stock Dyno Midrange HP: 328.09
Stock Dyno Midrange Tq: 355.29
MF103 Dyno Midrange HP: 338.02
MF103 Dyno Midrange Tq: 366.04
Midrange Gains: + 10 HP / 11 Tq across the board - most gains between 4500RPM-Redline

Peak numbers do not show the beauty and true gains of the new Halltech SBMF103. As we have proven time and again power under the curve and mid-range gains are what truly matter, especially on street driven applications. Gains were across the board, with more power and torque at every RPM. The Halltech SBMF103 gained 10-12 HP and 11-13 ft. lbs. of torque across the entire midrange only 10 minutes after bolting it on with no other changes. There were no dyno tricks, no ice bags, no locking converters, nothing but hard numbers and back to back dyno runs. The fuel trims were well within range of where they should be and the Air Fuel Ratio did not lean out to dangerous levels; in fact, the AFR was within 2 tenths of stock levels and under 12. Tuning showed even more gains across the board, 20 ft lbs. of torque and 13 HP in the midrange, but only peaked 3HP and 9 Tq Higher than the SBMF103 with stock tuning. This is a truly set-it-and-forget-it option for those who are not interested in having their Corvette tuned and/or are not close enough to a tuner to have a proper tune done.

Hope this information helps.

--
Sincerely, Jason Haynes
Lucky's Speed & Performance, LLC.
1-877-U-LUCKY-1
www-LuckysSpeed-com



Here is the stock LS3 vs. Halltech Super Bee MF103 with no tuning:

 

Great achievements!