Turbo6TA

For any of you folks that have installed long tube headers on your LS3 C6, just wondering how much rwhp you gained while still using the stock camshaft?

Years ago I had a 98 Pontiac Trans Am (automatic trans) with the LS1. It was a headers, heads, cam car and had one of the first 3,000 stall Yank converters ever made for the LS1 based cars. The car finally made 385 rwhp on the Dynojet. Pretty good for a first year LS1

I don't want to go into the engine on this 2011 GS (A6), but I am thinking a set of AR long tubes with cats might wake the car up a little more.

Right now all I have done to it is to install an Airaid intake and Chuck CoW engine and transmission tuning with 'booster'.

My guess is that a bone stock LS3 (A6) without any tuning will make about 370-375 rwhp on the Dynojet.

With just a set of catted long tubes and the Chuck CoW tuning, do you think that this car will make about 420 rwhp on the rollers (w/ stock cam)?

Any thoughts on any of this?

Thank's
Ron

dcvickers

FWIW, when I got my car dyno tuned there was an LS3 Camaro there. He had a CAI, 160 stat, and catless headers. It was a manual and put down 419/419.

mikeCsix

I have been contemplating this myself, any warranty concerns with what you have done so far?

HOXXOH

Purely as a guess, I'd say 420 is a major stretch. Why not do a before and after dyno check, which should tell you roughly what improvements you've already made are worth and then how much more the headers made.

You may consider tweaking the tune while on the dyno to take full advantage of the header change.

Turbo6TA

I will certainly get a baseline dyno as the car sets now prior to installing headers.

I am thinking that very little tweeking of the Chuck CoW tune I have now will be needed after installing long tubes ... except these cars do tend to run a little richer with headers (opposite of what you would think) ... so maybe the fuel tables in the computer would need to be tweeked a little.

I am just wondering what others have gained on the dyno after installing headers while still using the stock cam. I know we have quite a few members here that have installed headers on there late model Corvettes. Hopefully someone here has done a before and after dyno pull that they would like to share.


mikeCsix ... I guess you are reffering to warranty problems associated with the engine / trans tune I now have?

I guess if I ever have some catastrophic failure of some kind, I would have warranty problems once they did a computer scan, but I am betting nothing major will happen with this car.

I don't think there is much of a chance that any dealership would do a scan of my computer if the car was just in for minor warranty work, so that would not be a problem.

You know, as far as the warranty goes ... Installing headers may be a problem though. Headers stand out like a sore thumb as soon as the dealership opens the hood ... Will they honor warranty issues when they see the aftermarket headers on the car? ... that's the BIG question

Ron,

Turbo6TA

And as far as the Chuck CoW tuning I have already ... all I can say is that part-throttle response is much improved, the transmission shifts much better without "hunting" for gears all the time, and the car pulls harder at wide open throttle (WOT).

Prior to having the car tuned, I really wish I had done a before and after on the dyno.

My seat-of-the-pants guess is that the tune alone made somewhere around 20 rwhp alone ... but unfortunatly, I can't back that up with a dyno printout.

0Chuck CoW

Hey Ron.... NO NO NO NO......

This car is you DAILY DRIVER.... NO CAM FOR YOU.

You really should consider the 3.42 A6 ATTACK PACKAGE REAR END.

WAY MORE FUN THAN A CAM, WAY MORE TORQUE THAN HEADERS!

A HEADER install and the REAR END will cost you the SAME EXACT AMOUNT OF MONEY.

The rear end is WAY MORE ENJOYABLE.....

If the REAR END is out of the car, I would HIGHLY RECOMMEND the PRO TORQUE 12" 2800 CONVERTER.

Call me any time and I'll tell you more about it.....

Call me Ron, I got a secret for you.

Chuck CoW

Turbo6TA

Chuck ... I am in the Philippines right now, but I go back to Florida on 5 March, so I will certainly get back with you then.


Still a little concerned with the throttle "blip" situation we talked about.

Polar Jet

I haven't really gotten the chance to enjoy my Chuck CoW 3.42s and 2800 Pro Torque converter, but the little driving I have done has been a blast.

The responsiveness of the car with the 3.42s in pretty impressive. Third gear on city streets is going to be A LOT of fun. The converter... I don't even know if there is a higher stall converter in the car. Chuck says there is, but you would never know it. It feels like stock. Very impressed! Thanks Chuck!

shootincyclone

I cant help you when it comes to exact HP gain going from my stock LS3 to long tube headers, but I can tell you it made a noticeable difference from the drivers seat. Can you actually feel a 10HP gain, not sure, but this was enough to notice.

I've heard a number of times that a stock LS3 puts 380 to the ground but every car is different. Getting to 420 might be a stretch with CAI and headers alone.

I didnt dyno the car when putting the long tube headers on last fall as I knew the blower was just around the corner...cant wait until I get the call that she's done!

Turbo6TA

Ya .. 420 rwhp on the rollers with long tubes might be a stretch as you said, but my guess is the Chuck CoW tune I have now might have made an additional 15-20 rwhp as it is.

Again, I have no before and after dyno numbers to verify anything.

wazslow

A manual transmission LS3 with headers, airbox, and tune will usully dyno around 420rwhp. Your automatic will not dyno that high.

Sativa

I gained 42rwhp/38rwtq with LG super pro 1 3/4"

peter pan

I got a before chuck tune of 377 with my 09 A6, only mod was airaid and getting his tune done on the 22nd and will get back to the dyno, the only mod since is a complete ZR1 exhaust. Once I get new numbers I will post them up

Turbo6TA

Please do Peter Pan !

Thank's

Turbo6TA

wow !

jksvet

Manual tranny, 2010, 383rwhp before any mods. Callaway CAI, Kooks long tubes, and tune. 420rwhp.

SnowyATX

Bone stock: 387rwhp, 370ft-lbs
LG Tune & LG Streets ONLY, no other mods, intake, etc: 418rwhp, 394ft-lbs
I think I have some carbon build-up issues according to the guys at LG. Maybe my numbers would of been a little better up top???

speedraider

I also had a set of LG super pro's put on my car and it sure woke it up. I haven't had the check engine light come on yet, maybe Chuck COW's tune had the rear O2 sensors turned off. Still need to data log it and send it to Chuck.

Gene Culley

I believe the LS3 standard is 30rwhp without a tune and 50rwhp with a tune.