Question about drivability to people who have had heads/cam/headers in a LS2 auto

I am about to do this but leave stock converter and do a stall next year since I don't drive the car much and won't be launching.

If anyone has done those mods with the auto 6 speed and kept the stock converter, how did it feel, and of any, problems with doing it so.

Thank you for your feedback.

Cam will be most likely BTR III, ARH full long tubes.

 

My 2006 A6 LS2 is cammed and has TSP longtubes. I have not had the heads re worked yet. The cam is a .228/232 from 21st Century Muscle Cars. I still run my stock stall and it performs great. 21st Century did the insall and tune and they did a amazing job...no bucking or surging. Sometimes the car will try to creep forward when at a stoplight but it isn't too bad. Sounds amazing also!!

 

Awesome to hear man, and thank you for the input! Was thinking of leaving heads stock but might as well do them since it'll be taken apart. If you don't mind me asking, what did you make?

 

Yea I will have the heads done eventually. My next mod will be a 102 Fast intake manifold, and CAI. My car made 415WHP, and 397 lb. Ft of torque. Not bad considering im still running the stock intake manifold, and stock heads.

 

Yeah that's not bad at all man. Did you do a baseline Dyno run before to see your gains afterwards? I was thinking I'd probably put down 425-430 with the heads.

 

Personally, I would do the converter first. Then do other mods.

 

Unfortunately I did not get a baseline, but I know most LS2 A6 cars usually baseline at around 330-340 whp.

 

Agreed

 

Do yourself a HUGE Favor choose a 228/232 cam like mentioned and it will be
far superior to the BTR Stage 3 Both BEFORE (Especially) and after you add a stall down the
road, ~2800-3200 depending on axle ratio and goals would be my suggestion but
auto trans guys would know better than I.

A 231*!Intake Duration for a NA street driven LS2 is either at the large end of medium or
the small end of large which is made MUCH Worse with an +11* exhaust split which with well Ported or
aftermarket Heads is not needed, again NA with Headers & the C6 exhaust system.

A 231/235 would be much better especially with MMS, AFR, TFS,PRC,TEA, or AI Heads
to name a few. A + 11* exhaust split will not play well with the stock converter.
Unnecessary exhaust Duration increases Valve Overlap, this wastes torque and reduces throttle
response which makes tuning and part throttle driving more challenging,
Especially with the stock converter.

Even a 231/235 may be to large.
I stand by my initial 228/232 suggestion with minor tweaking based upon Heads, Headers Size & Type
(I like the ARH 1 7/8" with a 3"X BTW). MMS 223 Sportsmen & MMS 102 FAST along with
Porting your LS2 TB and using a VMax Velocity ring spacer saving $600.00 on a NW 102
(eliminates lip at plenum entry when using a 90 MM TB on 102 Intake. This makes tuning easier
and improves low speed & idle transitions.

Money spent for the best Heads you can afford are worth more than a NW 102 TB especially under 500 RWHP.
The prior combo easily eclipses 450 RWHP with great throttle response and driveability from 1500-6500+ RPM.
Just my .02
GL

 

A MMS Ported FAST Intake and a good CAI will add ~30 RWHP from 5500+ RPM ,
at least 12-15 lb' from 1500 RPM and 25lb'+ from 2500-5500 + RPM. It will be
HUGE, the stock LS2 is the worst flowing LS Intake and is holding your combo
big-time. Will you Dyno Pre & Post?

 

Very true, and I believe the LS3 heads also flow better than the LS2 heads.

I guess the cheapest fix would be to install a set of LS3 heads and a good used LS3 intake manifold on the OPs LS2 engine.

 

Yeah I'm actually going to do CNC heads along with cam kit. Either headers or converter, and in a few months get an intake/TB combo. I don't drive the car much anyhow, and it won't be tracked.

With getting married in January and spending quite the chunk of cash on that I can't do everything at once right now.

 

Just don't have your LS2 heads CNC ported ... They have 'Cathedral' ports, and won't match the 'Rectangular' ports of an LS3 intake manifold.

Of course, you more than likely already know that.

 

Oh .... and after you get some LS3 heads, I will sell you my LS3 intake manifold off my GS cheap (only has 18,000 miles on it).

Had to remove it in order to install my superchharger.

 

Yeah not re-using the stock heads, getting a fresh set, just going to dump the stock ones or make some sort of center piece out of it. Let me know man, how much do you want for it? Because the LS2 Mani is so trash...

 

Best bang for the buck for heads would most likely be the GM CNC-ported LS3 from BTR that BTR offers with their .660 springs and matching retainers installed. You can get a nice cam from BTR too, and some LS9 Head gaskets, while you’re at it. Then get Turbo6TA’s intake and you’ll have one badass 6.0.