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Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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Old 05-03-2010, 03:06 PM   #1
KillerBMotorsport
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Default Killer B Motorsport Header - Prototype Testing

I know a lot of you have been asking when I was going to get going on this thing. So here we are with some pics and 3rd party testing results

Some features:

The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power in the mid to high RPM range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary/double secondary designs. A difference you will immediately notice in throttle response and the ability to hold more power higher into the revs.

Features include:

Short Equal Length Primaries. The shortest possible length primaries you can have on an Equal Length header. Short means less header volume and quick spool up.

Symmetrical Primary Design. All primaries have a similar tube length AND bend geometry. This keeps the pulse velocities high and consistent compared to equal length headers with different (non-symmetrical) primary tubing geometry.

Smooth Mandrel Bends. All of the bends utilize a mandrel for smooth non-restrictive flow. Not only that, we use the largest bends possible at every location. It would be cheaper to use 2” bends everywhere, like others do, but that’s not going to give the best performance.

Thick Walled 321 Stainless Steel Construction for Long Life. 321 is alloyed with titanium, costs more, a lot more, but it’s the ideal material for high temperature turbocharged applications. Would 304 stainless work, yes, but the temperatures on our turbocharged cars can exceed the limits of 304 stainless enough to make them brittle and crack. 321 stainless steel has higher strength and toughness at elevated temperatures. It was developed by the aircraft industry specifically to address 304 stainless manifolds that were cracking. Killer B Motorsport is the only company that manufactures full 321 headers.

High Heat Retention. 321 stainless steel conducts less heat than 304 stainless steel. The short primaries and properly sized secondaries also pull less heat from the exhaust gasses increasing turbine efficiency. Large tubing headers expose the exhaust gasses to more surface area transmitting more heat and reducing exhaust energy. You can also ceramic coat or wrap our headers (and keep the warranty) without exceeding the temperature range like you can with 304 stainless.

V-Band Up-Pipe Connection. Why V-Band? Fast, easy, no gasket, no leaks, perfectly concentric alignment of tubes for no disruption of flow, what’s not to like!

Up-Pipe included. Of course it comes with an Up-Pipe! This header was designed as a complete system. Using other up-pipes would only compromise performance, and nobody wants that.

Weights only 17 pounds (vs. OEM weights 25 pounds)

Works with OEM EJ25 Oil Pans, and Killer B Motorsport Performance Aluminum Oil Pan

Made in the USA and Killer B quality!

The Pics...






Testing by YimiSport...

15ft/lbs of peak gains, 40+WTQ at 3,900RPMs

27whp peak gains and bigger mid-range gains

More power EVERYWHERE!



Testing by EFI Logics...

8wtq of peak gains with 28+ WTQ at 6,100RPMs

27whp peak gains with 31+ WHP at 6,200RPMs




And more testing... THANKS EPIC MOTORSPORTS!!

18wtq of peak gains with 27+ WTQ from 4,400-5,500RPMs

25whp peak gains with 30+ WHP from 4,800-5,700RPMs





When do these headers choke? We still don't know




Killer B's GD


Customer's GR

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Last edited by KillerBMotorsport; 11-27-2012 at 10:10 AM.
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Old 05-03-2010, 03:31 PM   #2
Unabomber
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Questions that will sure to come:

What cars will this fit on?
Why are you using a crappy Fram filter?
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Old 05-03-2010, 03:41 PM   #3
xrocket21
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It says Equal Length above. at least read the post first
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Old 05-03-2010, 04:07 PM   #4
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Do you need a test car :-) I am will to try.
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Old 05-03-2010, 04:31 PM   #5
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Quote:
Originally Posted by Unabomber View Post
Questions that will sure to come:

What cars will this fit on?
Why are you using a crappy Fram filter?
Good questions.

It fits an 05 STi for sure and probably a safe assumption it will fit pre-08 Impreza models, although that has not been verified.

The filter was free with my purchase of a whole bunch of the "that stuff will blow your motor" Mobile 1.

It sounds NOTHING like the OEM header. The GPMoto that was on there had the usual EL sounds. This one is a touch quieter from the front of the car (my guess is because of the thicker wall material), but has a deeper tone than the GPMoto

Quote:
Originally Posted by BlackFighter View Post
Do you need a test car :-) I am will to try.
You're not the first to ask, but I'm not taking anyone up on that offer until I get the final material costs nailed down.

Oh and it also weighs 16 pounds. For comparison the OEM one weighs 25 pounds.
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Old 05-03-2010, 05:12 PM   #6
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Design looks good, im officially curious

why wouldn't this fit on 08+ WRX?
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Old 05-03-2010, 05:20 PM   #7
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Quote:
Originally Posted by WRX SEX View Post
Design looks good, im officially curious

why wouldn't this fit on 08+ WRX?
It may. I know the crossmember is different from 08-on so I'm trying to be a bit cautious until I know for sure.
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Old 05-03-2010, 05:28 PM   #8
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well i'm crossing my fingers because I'm very interested to see how this turns out, especially because I'm in the market for a quality header
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Old 05-03-2010, 05:33 PM   #9
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This may be a stupid question, but how come on your graph the power and torque line cross at 4200 instead of the usual 5252? Just curious if I'm missing something?
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Old 05-03-2010, 05:54 PM   #10
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and before the header was installed dyno printouts?
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Old 05-03-2010, 05:58 PM   #11
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saw this in person. i'm saving up to buy one by the end of this year

fitment will probably require the 2.5L oil pan unless you don't care about your exhaust manifold rubbing on the 2.0L pan.
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Old 05-03-2010, 06:32 PM   #12
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Quote:
Originally Posted by RE4PER View Post
This may be a stupid question, but how come on your graph the power and torque line cross at 4200 instead of the usual 5252? Just curious if I'm missing something?
Good eye. Look on the sides and you'll see the scaling is different. I don't know why it's setup this way.

Quote:
Originally Posted by richy_21 View Post
and before the header was installed dyno printouts?
I have plots from last year, the year before and a few others, but none on that same dyno. I had a window of opportunity, but not the time to do a true comparison. The numbers are better than any I've had with the GPMoto header, which as you know I really liked. I can post some old graphs, but I don't know how relevant they would be. I'll dig through what I've got tonight.

Quote:
Originally Posted by nhat View Post
saw this in person. i'm saving up to buy one by the end of this year

fitment will probably require the 2.5L oil pan unless you don't care about your exhaust manifold rubbing on the 2.0L pan.
It will definitly only work with a EJ25 pan (or Killer B pan ) but if you do any performance or track driving you should consider an EJ25 pan or aftermarket piece anyway. The EJ20 pans have a higher probability of oil starving under hard cornering.
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Old 05-03-2010, 10:17 PM   #13
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Here is one from fall 2008. Exact same setup, but with the GPMoto header.




Here's another one from Spring 2009. Again, exact same setup but with the GPMoto header.

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Old 05-04-2010, 03:00 AM   #14
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Looks pretty cool. What are the diameters of the primaries and secondary / UP?
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Old 05-04-2010, 02:27 PM   #15
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ID 1.50 and 1.75
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Old 05-04-2010, 02:56 PM   #16
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Do you think you will build these to fit stock or aftermarket 2 bolt up-pipes?
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Old 05-04-2010, 03:42 PM   #17
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No, it will have a v-band to our up-pipe that is included. We'll eventually have EWG, rotated and other options. Building to other up pipes just adds variables to the 'system' that may or may not perform properly.
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Old 05-04-2010, 07:49 PM   #18
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Makes sense. So you should defiantly build ones for EWG right away so I won't have to wait.
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Old 05-04-2010, 08:38 PM   #19
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Quote:
Originally Posted by Murphdog View Post
Makes sense. So you should defiantly build ones for EWG right away so I won't have to wait.

this! I'd love to ditch my 3 bolt setup
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Old 05-04-2010, 08:50 PM   #20
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Old 05-04-2010, 11:29 PM   #21
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but i dont want to buy another header
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Old 05-04-2010, 11:43 PM   #22
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sound clips?
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Old 05-05-2010, 12:16 AM   #23
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will there be a non eq setup?
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Old 05-05-2010, 12:33 AM   #24
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Quote:
Originally Posted by seekndestroy19 View Post
sound clips?
I hope to have some this weekend. Idle, throttle blips, and a WOT through the gears.

Quote:
Originally Posted by BlackFighter View Post
will there be a non eq setup?
No.
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Old 05-05-2010, 12:38 AM   #25
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Id like to see these on a big turbo setup...not some tiny vf39
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