LS3 A6 expectations
Thread Starter
Drifting
Joined: Mar 2008
Posts: 1,473
Likes: 546
From: Orlando & Flagler Beach FL
LS3 A6 expectations
Having sold off my A4 2003 Procharged, LG long tube headers, & 3.42 diff almost 1 yr ago, I am looking at getting back in the game.
I would look for an A6 (need auto due to being a left leg above knee amputee) LS3 w/the Performance axle option - I believe that would be a 3.15 ratio (?). The plan would be a Procharger @ 7lbs boost, and long tube headers. Anyone have this setup or can estimate what kind of RWHP & TQ Dyno numbers this would produce?
Thanks in advance.
I would look for an A6 (need auto due to being a left leg above knee amputee) LS3 w/the Performance axle option - I believe that would be a 3.15 ratio (?). The plan would be a Procharger @ 7lbs boost, and long tube headers. Anyone have this setup or can estimate what kind of RWHP & TQ Dyno numbers this would produce?
Thanks in advance.
Burning Brakes
Joined: Aug 2012
Posts: 811
Likes: 18
From: STL
No meth? So just 7psi and Headers?
All depending on dyno and tune could make 550-600 or so.
My old G8 before i did alot of the mods was a procharger kit on 8psi A6 and a 6.0 motor made 499 on a mustang dyno.
All depending on dyno and tune could make 550-600 or so.
My old G8 before i did alot of the mods was a procharger kit on 8psi A6 and a 6.0 motor made 499 on a mustang dyno.
Thread Starter
Drifting
Joined: Mar 2008
Posts: 1,473
Likes: 546
From: Orlando & Flagler Beach FL
Yeah, no Meth. Going with 7 or 8 psi as I do not plan to change any internals and want the engine to last. I was thinking 600 rwhp would be a close estimate.
Thread Starter
Drifting
Joined: Mar 2008
Posts: 1,473
Likes: 546
From: Orlando & Flagler Beach FL
BTW - would also be adding long tube headers but no internal mods.
Last edited by cal45; Sep 8, 2013 at 01:49 PM.
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
I'd say 550 tops, my original setup was LS3, A6, long tubes with 9.5lbs of boost. Made 551/539 on a dynojet on a "conservative" tune.
I think the gearing choices for the A6 are 2:56's or 2:73's.
I think the gearing choices for the A6 are 2:56's or 2:73's.
Last edited by FASTENUF; Sep 8, 2013 at 02:51 PM. Reason: mistake
Thread Starter
Drifting
Joined: Mar 2008
Posts: 1,473
Likes: 546
From: Orlando & Flagler Beach FL
Thanks. Doesn't the Performance Axle option on the C6 up the gears to 3.15? I do know that this is true on the C5's.
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
The A6 is 2:56 stock with 2:73's optional performance gears.
Or atleast that was the options for my A6, don't know if they have changed the gearing for the A6's.
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Drifting
Joined: Dec 2004
Posts: 1,706
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From: Toronto Ontario
On my 08 LS3 A6 I recently did an ECS SC1500 with restrictor plate installed. Combined with American Racing headers and high flow cats, a 3000 stall converter and a 3.42 Diff tuned conservatively on 91 octane I made just under 600rwhp and 535rwtq.
With the converter and gears, the car revs up fast putting me in the power band at the drop of a hat when required. Most on my city driving is below 3,500 rpm and the car drives as if it were bone stock.
With the converter and gears, the car revs up fast putting me in the power band at the drop of a hat when required. Most on my city driving is below 3,500 rpm and the car drives as if it were bone stock.
Burning Brakes
Joined: Apr 2007
Posts: 972
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From: Dawsonville, GA
If you plan to lean on it hard in the future... I'm not sure the A6 is your best option. You may want to consider an '05 car with the A4 trans. You can pretty easily upgrade to a snappier and beefier 3.42 C5Z rear diff too.
Just throwing that out there. Not trying to poop on current A6 owners.
Just throwing that out there. Not trying to poop on current A6 owners.
Thread Starter
Drifting
Joined: Mar 2008
Posts: 1,473
Likes: 546
From: Orlando & Flagler Beach FL
If you plan to lean on it hard in the future... I'm not sure the A6 is your best option. You may want to consider an '05 car with the A4 trans. You can pretty easily upgrade to a snappier and beefier 3.42 C5Z rear diff too.
Just throwing that out there. Not trying to poop on current A6 owners.
Just throwing that out there. Not trying to poop on current A6 owners.
My 03 had a conservative tune and boost set at 7psi and made 475 rwhp
Race Director
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From: Out Where the Buses Don't Run, Eglin AFB/ Niceville FL
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I have an internally stock LS2 with the A6 coupled with an A&A V2 kit (7 PSI) and LG Pro long tubes. My car dynos at 541rwhp and 494 ft lbs torque. You should squeeze out a few more ponies with the 30-36 flywheel hp difference with the LS3.
Geaux Tigers!!!!
Joined: Nov 2007
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From: DeRidder LA
St. Jude Donor '08 thru '26
A&A V3 SI,Kook's 1 7/8's, Meth and a very conservative tune with the 3.8 pulley at 8ish LBS. of boost with the stock convertor 608/554..
Have since pullied down to 3.6 pulley and added a 3 disc 2800 stall Vigilante in a stock A6. Have had "0" problems with the transmission after a spot on tune from Doug at ECS..
Have since pullied down to 3.6 pulley and added a 3 disc 2800 stall Vigilante in a stock A6. Have had "0" problems with the transmission after a spot on tune from Doug at ECS..