Well, it is time for a change so I think I will do a LS2 402. This is for a street setup so nothing extremely wild but potent nonetheless.

Forged LS2 bottom, 4.00 crank,
6.125 rods,
Wiseco 2cc relief pistons, with nitrous rings.
Heads 317s that I let AI work their stuff on.
Cam my specs, medium lope, ~10* overlap.

I'm shooting for 450rwhp and some megatorque. This will be for my 2006 C6, A4.

 

I think you should have no problem hitting your numbers, sounds like a sweet build.

 

Sounds like a fun build! Hope we get to see a build thread!

 

I bet you brake the rear end.

 

Car will not drag at strip, on street tires I think it will hold, it has so far but I'll upgrade if necessary.

 

I just want NA power, I'm hurting in the IAT department with the supercharger. No Meth allowed here.

 

awhile back someone with a vette did a similar 402 build with AFR heads. Cam was supposedly 237ish on intake duration.

I think he got it into 10's on nittos. He even posted incar videos at the strip.

 

Sounds like a fun build. But why 317s over a smaller chamber head?

 

Not a big cam, they will be milled a bit and I already have them. This is my DD, 68cc and 11.3 SCR. Plenty for 94 octane.
Cam will probably be a 226/232 112+2 LSA, powerband 1800>6300rpm, I have a SS3200 stall so it should act nicely witha nice Borla rumble.

 

I my be missing something but all auto c6s are a6s, right???!!!

 

05 still had the 4l60e. I thought 06 had the 6 speed though.

 

Im running an iron 402 (hke) in my z06 with tfs 215cc and a comp lsl 239/243 cam. Made 506rwhp and an insane fat tq curve through 1 3/4" headers and 2.5" exhaust.

 

I cannot verify that. Mine is titled as 2006 but has an A4. Whether this is a production or custom issue or else, I dunno. Maybe a late 2005 that made it in this country by 06 and titled as such,

 

How awesome is the day when you can drop a 4inch arm into a small-block ??
The LS architecture is really neat. As for the rear end...I believe the C6 case
has more casting beef(ribs,bracing) and with an external perimeter brace they
last remarkably well in an auto application. Street tires will also offer that
intellectual insurance against costly repairs. AHHH the art of eggshell gaspedal