ch47d1sg

Can anyone compare the performance gains from:

Stock LS3 vs Stock Z06 vs aftermarket long tube/short tube headers

Stock LS3 engine with Corsa Sport exhaust

Look forward to the comments!

VET4LES

Keep in mind that no long tube headers are CARB approved and could cause a failure in your next smog visual test.

0Anthony @ LGMotorsports

Mufflers or full exhaust system?

From what I have seen on a stock powered C6 or C6Z06 a muffler change is worth more for weight loss than it is HP. Most of them will pick up 4-8 HP but drop anywhere from 14 to 30 lbs of weight off of the car depending on application and mufflers used.

Installing the full Z06 system, manifolds and all on a LS2 or LS3 powered car is worth 12-16 HP and weight generally remains about the same or you pick up 2-4 lbs of weight because of the larger pipes.

Installing a full long tube header on the car (with or without cats) you will see 25-32 HP, the biggest increase will be the 30-40 ft-lbs of torque gain. You should also drop 20-28 lbs of weight from the car as well by doing this. (this is figured with OEM mufflers)



All of my HP figures are based at the rear wheel on a dyno jet from results I have seen here.

ch47d1sg

Thank you... As I am aware of that. I am on temporarily out here and will be returning to Texas in late January where there are less restrictions.

F40

TCW

Is this true if the car is not "re-tuned" after the header install? I'm asking because I'll be installing your headers myself. Thanks.

Tom

BBExhaust

I can't say what kind of other manufactures are seeing however we have seen increases in the mid 40's of both HP and Torque with the long tube headers, x-pipe with high flow cats and our Bullet exhaust system on both the LS3 and Z06. As for axle back systems we have systems that range from 8-17hp. For more information you can visit our website, www.bbexhaust.com or email me at mark@bbexhaust.com.

Mark Fowler
Billy Boat Performance Exhaust
888-228-7435 Ext.18
mark@bbexhaust.com

0Anthony @ LGMotorsports

A true long tube header should be re-tuned after install because it does change the air flow through the engine enough to warrant a fuel change.

S'vette

Does this setup pass emissions test? I know they might fail it on looks but other than that does it pass?

BBExhaust

Yes, The cats we use are a 200 cell metal catalyst and aside from the visual inspection we have not seen any issues passing emissions. There always exceptions and if you have altered the tune so it is running excessively rich or something out of the norm you could run into issue the same as you would with the factory cats.


Mark Fowler
Billy Boat Performance Exhaust
888-228-7435 Ext.18
mark@bbexhaust.com

S'vette

Would you happen to have a vid of your headers, x-pipe w/HFCs and the PRT exhuast? Also do you have resonators that can be added?

oklahoma

I added a full stock z 06 exhaust including mufflers to my stock 2008 c6a6 with2.56 gear and then a sunset controller for the exhaust. Looking at over 40 time slips before and 40 after and with no change in tune the zo6 exhaust reduces et's by .11 seconds and adds 1.5 mph with mufflers closed. Open mufflers nets a total et improvment of .2 and adds 2mph to the top end. The exhaust install includes a poorly welded over the axle section of the oem base exhaust that was rewelded to the zo6 mufflers. I do not have any afr data but I suspect that the change leaned out my afr some and that it may have contributed to the change in performance. I have used the car for bracket racing and do not strive for max performance but rather consistency so the actual time slips are quite varied depending on the venue(bracket vs index racing and various track elevations) I posted my best stock time on the forum 12.26@115.x. One other thing if you can stand the extra resonace and cruise with the mufflers open at 80mph you will gain 1.5 mpg

S'vette

I think you are right about that, freeing the intake and exhaust will lean a car out and gain some power that way. Just have to make sure it doesnt get too lean and thats where a good tune will come in and put all in its sweet spot. In my last car when I first got it the tail pipes would get black from running on the rich side and when I did all my intake and exhaust mods they wouldnt get black cuz it leaned out but had more power. But I quickly addeda tune and got even more power as they adjusted AFR and timing a bit.
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