Turbo6TA

There seems to be a lot of folks here that have installed headers on there C6 / LS3.

A bone stock LS3 / A6 will normally make about 370 RWHP (SAE corrected) on a DynoJet.

Will adding a set of headers with cats, along with a good tune get an increase of about 40 RWHP (370 + 40 = 410 RWHP)?

Again, this is on a bone stock LS3 GS with A6 trans.

Thanks for your opinion ...

bigwoofersnet

My car put down 369whp on a Dynodynamics stock, added a Vararam (supposedly doesn't show much HP), headers 1 3/4" and NPP then 93 Tune and got to 418whp. I got a 60whp increase from stock, but that was moving to E85 as well. This a M6 though, so not sure if this helps.

Turbo6TA

Thanks for the input.

I believe a DynoDynamics will show a lower RWHP number (just like a Mustang dyno) in comparison to the DynoJet ... so your 369 RWHP is probably very accurate for a M6 on the DynoDynamics.

A 60 RWHP increase for headers and tune is fantastic ... I wonder how much lower that would have been on standard pump gas instead of the E85?

bigwoofersnet

Yea, my tuner said I would probably be closer to 450whp (final #'s) on a dyno jet.. but I don't care as much about the final number because it'll vary dyno to dyno, I just care about the gains. We actually did a 93 tune that same night, that was my 418whp #. My final numbers were 430whp/447tq with E85.

Turbo6TA

Well, going from 369 bone stock to 418 on pump gas is really a great increase (+49)

Was that done on the same dyno?

bigwoofersnet

Same dyno, both numbers SAE corrected.

1MEANGS

100% it will... I made 410 RWHP 412 RWTQ without headers... MODS; SLP Intake, B&B Bullets exhaust, Cat delete, ECS tune... (; Dynapack Dyno

DOUG @ ECS

We generally see 50+- rwhp gains from a CAI, headers, stat and tune. (our stage 1 package)

Late Model Racecraft

That's about what we see as well

OBSSSD

Yes you will get 20 from tune and 25 from headers

But with LS3 go 1-7/8" if you are going with a 4-1 header

Turbo6TA

I was thinking a set of American Racing 1 3/4" with cats.

Retaining the stock NPP mufflers

Possibly a 3,200 stall Yank SS converter too.

(This is a 2011 GS)

Boomer111

I got 422 both rwhp and rwtq with American Racing 1 3/4 catted headers with tune and Vararam plus 160 stat. LS3 MN6. Dyno Jet.

Dado5

my 2012 GS with LG headers, SLP loudmouth, Airaid intake, vararam spacer and tune made 430whp.
TPS motorsport tunned it . Very happy

Erics_02_z06

with a halltech, pfadt headers, and a tune I picked up about 55. Sounds great if you have the npp option

0Anthony @ LGMotorsports

Personally if the car is going to stay close to stock....1 7/8 is not the way to go on the 6.2L in the Vette.



2008 LS3 M6 Corvette before and after LG CAI and 1 3/4 SPro header
before dyno with B&B PRT,
vs
LG SPro 1 3/4 headers
High flow cats
LG Carbon CAI
LG Dyno tune





2009 LS3 M6 Corvette Baseline with cold air, after with LG S. Pro 1 3/4 headers and tune.





2008 LS3 M6 before and after Street Series headers and cold air induction

skip89

I have a LS3 M6 G S Vette . So with headers tune and torger cam I will have more power than stock ZO6 ? I am talking Katech cam Like torger 10. I cant spell torger I know. Or something from ECS ?

skip89

Want back to ZO6 power

C7/Z06 Man

I don't have a dyno# but I understand that if you know the weight of your car with driver and the 1/4 mile "MPH" there are formulas out there that can get your rear wheel "real world" HP within a percent or two.

My 2010 GS (A6) has went 122 MPH (not my record ET run) in the 1/4, total weight w/driver approx. 3570 lbs. Anyone have a HP# for this mph & weight?


2010 GS MOD SPECS.

1) 1 3/4" headers, no cats & 3" X-pipe connected to the stock (430 HP) mufflers. < save some money!

2) 93 octane DiabloSport "canned" tune.

3) OEM air assembly with oem paper filter that I converted to a CAI. < cheap

4) 160 stat.

Running on all four stock Goodyear runflats & stock converter.

HOXXOH

Wow! You'd think with all those big dyno numbers floating around, that there would be a whole lot of 1/4 miles times in the low 11's and high 10's on the bolt-on LS3 list.

My last dyno pull was 411 HP and 443 T. The last 1/4 mile was 11.19 in 2423' DA with no changes after the dyno pull.

Pitufina

I agree with you. My car m6 has 1 3/4 headers, 3" reduced to 2 1/2" x pipe, no cats and a diablew tune. Never been on a dyno but with some 275 drs I ran 11.90@120 on my third pass with those tires. I'm still learning how to launch this thing, but the mph indicates mid to low 11s. That's my target before I install my custom cam.