I am new to the forum and want to ask if anyone has any ture hard dyno power numbers on LG Motorsports C6 street series headers. I know there a bunch of different headers to select form and would be interested in your dyno results for simular set up.
I am running a Cold Air Intake, Corsa sports exaust, with a Superchip Cortex tune. My before mods numbers ...rounded off.. were 342 HP and 336 TQ. The after mods #'s are 373 HP and 364 TQ. Made a good deal of difference with very little work and not much $$$.
So if you have done headers on you LS2 and run the car on a dyno before and after I would like to know your results and especially if you went with the LG Motorsports set up.

Thanks Andy

 

I have the Street series headers, halltech intake, NPP exhaust and a hp tuners tune and made 420/425 with my 08....

 

Since your car is already tuned, a set of headers (basically any longtube headers) will probably pick up between 15 and 20 at the wheels after a retune. I would only guess you'd be on the high side (20rwhp) of that if your car was tuned poorly to begin with, which it doesnt like it was if you're making that kind of power. Basically, I'd guess you'd be around 390rwhp after headers.

If you add headers and a tune to a car that hasnt EVER been tuned then you'll get closer to 30rwhp.

 

"ture hard" numbers are tough to get, but I went from Kooks 1 3/4" headers to American Racing 1 7/8" headers on a car making almost 600 horsepower at the wheels and the difference was less than 1%, pre and post tune. This has me convinced that the difference between various brands is quite small and as such you should pick based on things such as price, fitment, availability, etc...

 

Nice results on your mods, op has a ls2.

 

Not a lot of info on the street series other than they produce less hp than the long tubes. The typical gain for lth, cai and tune is 40 rwhp, with headers usually accounting for 25 of that. Since you gained 31 hp from the combo, I would think you got 14 or so from the street series headers. This is about the same as z06 headers would have produced.

 

I just helped install a set of AR headers on a C5Z06. The fit was perfect, and the install went without a hitch. Fighting headers is no fun.
It would help if you fill out your profile a bit. We Oregonians are fortunate to have an excellent performance shop right across the river in Vancouver. If you live anywhere near Vancouver I would give Tom a call at Wongs Performance Engineering. (360 695 9433). I drive 2 1/2 hours for his work..

 

On a basically stock LS2 you are not going to see much of a difference between our Pro and Street Series headers.

Now as the modifications mount, and you produce more and more power you will start to see that power difference grow between them as they Street Series just do not contain all of the higher end features that the Pro's do.

Typically we will see 24-32 rwhp and more importantly 28-35 ft-lbs across the board which, for anyone that has done this will tell you. Torque is what moves you stop light to stop light the quickest!


Check out our Gallery Section for more combinations with the Street Series headers for results we have seen here.

LG MOTORSPORTS GALLERY

 

Well I steped up and bought the LG street long tube off road headers, which bye the way can be converted to street headers by removing the the center pipe and adding the cats.
I will be running the car on the Thunderhill Road Course and will also get dyno #'s when I am at the track. The figures should be accurate as this is the same dyno I used when I added my other EZ add ons.

 

Just found this thread Figure id give it a bump

 

very interesting, {ONLY 1% GOING TO A BIGGER PRIMMARY} on a forced inducted car. i bet in an NA no difference or the KOOKS would edge out in the same primary size, i know the KOOKS work for me

 

Even though this is an old thread, I could not agree with PL more. All these companies make the best headers they can and you'd be hard pressed to go any slower or faster with any of them.

 

Any header will dyno very close to one another if they are similar length/size primaries.

 

I am not sure if you have already bought headers, but I just put on some Kooks 1/78 long tubes, GHL exhaust, and Vararam intake and was able to hit 385 / 381 after an HP tune.

 

Well after a summer of attempting to get more HP and Torque from the LG Motorsports street long tube off road headers (no CATS) I am some what disappointed. After bolting on the headers which did fit up well and adding some extra insulation to certain sensitive areas. I had no problems with the header package; except customer service parts issue which I will speak of later.
The dyno does not lie and the numbers were a bummer, 7 Horsepower 9 Lbs of Torque. I call and spoke to LG Motorsports and they felt that if I had them tune the computer I would pick up more power, so I sent in the computer LG Motorsports and reinstalled it and then back to the dyno about 8 weeks later. After the recommended mail order tune by LG Motorsports the car lost 1 HP and gained 3 Lbs Torque; this is compared to the Cortex 2950 handheld tuner. So after spending over $1500 I have a car that sounds like it make a lot more power that it does. I am very happy with the sound of the car on acceleration but it does pop very loud on deceleration.
Best numbers are 380 HP at 5800 rpm and 377 Lbs Torque at 4600 rpm. Just for those who are interested the torque band is very strong at beginning at 2600 rpm 340 Lbs Torque and begins the fall off after at 6000 rpm 329 Lbs Torque. I beleive this is the end of my attemt to improve the performance of the LS2.
LG Motorsports customer service.
1. I was tough to get some hard #’s on what type of power gain I could expect, finally someone stepped up and with a number of 15 to 20 HP and the LG online dyno charts more or less support that amount of increase.
2. I was shorted 2 exhaust clamps, I called and parts said they would send them out right away, didn’t happen. Emailed and nothing happened so I have 2 rusty old clamps on the very nice looking polished stainless headers.
3. Requested the return of my computer be sent back to me UPS 3 Day (which it was) and was over charged $21 for shipping. I complained and ask for a refund on my credit card for the overcharge and got NOTHING.

Andy

 

Sorry to hear that. Ive always heard KooKs and American Racing were better headers anyway. Im seriously considering the ARH stepped 1 3/4 1 7/8headers for my LS2 with trick Flow heads and cam.
Good Luck

 

I have the LG Pros W/cats. I didnt have a baseline dyno but I got some power.

The problem I have with them is the fitment. It souds like I have a leak somewhere when driving next to a median. Clamps, pipe spreaders,, blah blah blah..

 

SgtRod
With all the slip fits and clamps there are a lot of places to leak and I think that is the reason the poping noise when decelerating at high rpm's in lower gears, my guess fresh air gets by the clamped slip joints and unburned fuel (no cats) lights off making the loud poping.
Try some aluminum AC duct tape arounf the seams that will give you a tempory check for the leak stopage, that worked for me.
Andy

 

Andy,

Why AC duct tape? Is that the same as regular duct tape? The thing is what do you do to fix it short of welding it once you find it?

Funny thing is..think they are the most expensive header on the planet

Im happy with the power so Im not ******* them but what a headache it can be.

 

The AC tape is made of real metal and will not burn up.