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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 03-29-2010, 02:04 PM   #1
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BBK Shorty Header Dyno Test Today!!!

I really didn't want to do this test, but we had a car show up with shorties already to purchased that we were suppose to install. Because the car is getting other components installed we decided to do the headers only first & see what the car would pickup with shorties.

Car baselined at 349.77hp 367.03 lb ft dyno tested in 3rd gear.

We'll post results graphs asap!!
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Old 03-29-2010, 06:34 PM   #2
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Pull 1 Baseline
Pull 3 After Shorty Headers



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Old 03-29-2010, 06:42 PM   #3
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So basically you LOST 7ft/lbs of tq, switching to shorties? Guess that's another vote for NO SHORTIES.
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Old 03-29-2010, 06:45 PM   #4
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Were all my shorty header guys at?

I gues this pretty much sums it up, go long or stay stock...
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Old 03-29-2010, 06:54 PM   #5
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I sure didn't see that happening. Wow!
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Old 03-29-2010, 07:03 PM   #6
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No wonder the shorty header companies didn't step up for the dyno comparo.
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Old 03-29-2010, 07:12 PM   #7
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Quote:
Originally Posted by Jason 98 TA View Post
Pull 1 Baseline
Pull 3 After Shorty Headers



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Old 03-29-2010, 07:14 PM   #8
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How the hell do you LOSE hp?!?
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Old 03-29-2010, 07:21 PM   #9
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Wow! I guess shorties is on the ropes now...
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Old 03-29-2010, 07:38 PM   #10
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u cant make a blanket statement for all shorties. BBK messed up not everybody
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Old 03-29-2010, 08:01 PM   #11
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Looks a little short of the 20-30 HP gain the manufacturers were suggesting. That is really disappointing.
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Old 03-29-2010, 08:04 PM   #12
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Ummmm...wow.
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Old 03-29-2010, 08:28 PM   #13
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Wow, that really sucks
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Old 03-29-2010, 08:42 PM   #14
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Quote:
Originally Posted by Jason 98 TA View Post
Pull 1 Baseline
Pull 3 After Shorty Headers



Exactly What I expected, I just didn't want to come out an say it.
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Old 03-29-2010, 08:56 PM   #15
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didn't the DT's make a ton of power????
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Old 03-29-2010, 08:59 PM   #16
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Um, if this is the case, I am going to return my Doug Thorleys when they show up
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Old 03-29-2010, 08:59 PM   #17
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LOL I did come out & say it & everyone thought I was a butt! I dyno tested run 2 & 4 in 4th gear & it was almost identical results. Just so you guys know I even reset the pcm for 2 & 4 to make sure the computer wasn't in low timing for either setups.

Guys this isn't really suprising at all, it's the same results we've seen several times with LS1 cars.

It has nothing to do with BBK screwing up like someone said, I'd pretty much eat crap if ANYBODY had a good working shorty!! :( :(
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Old 03-29-2010, 09:00 PM   #18
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Do that install with before & after results iBK, I bet you get the same data :( :(
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Old 03-29-2010, 09:49 PM   #19
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Quote:
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LOL I did come out & say it & everyone thought I was a butt! I dyno tested run 2 & 4 in 4th gear & it was almost identical results. Just so you guys know I even reset the pcm for 2 & 4 to make sure the computer wasn't in low timing for either setups.

Guys this isn't really suprising at all, it's the same results we've seen several times with LS1 cars.

It has nothing to do with BBK screwing up like someone said, I'd pretty much eat crap if ANYBODY had a good working shorty!! :( :(
There are a few of us that believed you and Ted as well. It's just that there are a TON of people that can't get it through their skulls that a manufacturer would pad their results or just plain lie about them. That's why we appreciate you guys for showing us the REAL results.

Look on the bright side guys, they are CA legal.
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Old 03-29-2010, 10:02 PM   #20
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1 3/4 Shorties for sure will make power over the factory manifolds. The test would need to be done on a M6 as the dyno operator is not going to roll into the throttle the same every time on a auto car.

I have seen 45-50RWHP with longtubes/Tune and I have also seen 13-15rwhp with just 1 3/4 JBA Shorties. I but if you added the shorties and a pair of mids you might pick up some good power.

I know with my old GTO I had 1 5/8 shorties and non-catted mids and I made 6rwhp less that my buddy that had the same mods just 1 3/4 Longtubes and mids.

The cats are the main restriction on these cars and I am glad companies like JBA sell the catted and non catted mids so if you don't want headers you can just buy the mids.

DW
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Old 03-29-2010, 10:08 PM   #21
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I am also sure not all shorties are made equal. I would be interested in seeing the DT's and JBA's tested. Anyone wanna volunteer?
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Old 03-30-2010, 01:44 AM   #22
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1 3/4 Shorties for sure will make power over the factory manifolds. The test would need to be done on a M6 as the dyno operator is not going to roll into the throttle the same every time on a auto car.

I have seen 45-50RWHP with longtubes/Tune and I have also seen 13-15rwhp with just 1 3/4 JBA Shorties. I but if you added the shorties and a pair of mids you might pick up some good power.

I know with my old GTO I had 1 5/8 shorties and non-catted mids and I made 6rwhp less that my buddy that had the same mods just 1 3/4 Longtubes and mids.

The cats are the main restriction on these cars and I am glad companies like JBA sell the catted and non catted mids so if you don't want headers you can just buy the mids.

DW

You've SEEN 15whp gain on a 2010 Camaro with JBA shorties? If you have, please post up the proof. I'm sure many on here would love to see it.

Comparing one car to the next without a baseline run means absolutely nothing. There's documented 10-20whp difference between identical, completely stock cars, on the same dyno.
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Old 03-30-2010, 02:31 AM   #23
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Quote:
Originally Posted by 2010 4 DW View Post
1 3/4 Shorties for sure will make power over the factory manifolds. The test would need to be done on a M6 as the dyno operator is not going to roll into the throttle the same every time on a auto car.

I have seen 45-50RWHP with longtubes/Tune and I have also seen 13-15rwhp with just 1 3/4 JBA Shorties. I but if you added the shorties and a pair of mids you might pick up some good power.

I know with my old GTO I had 1 5/8 shorties and non-catted mids and I made 6rwhp less that my buddy that had the same mods just 1 3/4 Longtubes and mids.

The cats are the main restriction on these cars and I am glad companies like JBA sell the catted and non catted mids so if you don't want headers you can just buy the mids.

DW
The cats are the restriction...

I have cut open the OEM cats (all four), and manually removed the material inside. I will have dyno proof on thursday that this is the case... Stay tuned...
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Old 03-30-2010, 06:20 AM   #24
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This is disappointing according to the latest test data of the products I was going to intall on my car (cold air kit and shorty headers) My car will be slower then when i bought it :(
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Old 03-30-2010, 06:31 AM   #25
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All the dyno shows is that all other things being stock that the stock exhaust manifolds are not the "weak link" in the air goes in goes out equation.
If you do more mods to your car like cold air and cat back then the shorties will start to prove their worth. Mods to cars are usally complimentary and not stand alone end all be all.
One last thing as we saw in the Cold air shoot out with GM high tech small changes in temp/humidity can change HP so maybe the shorties arent as bad as this one dyno shows.
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