Well, I'm back from the dyno ! Finally got the new build finished. Goals were CARB/smog legal, retain good street manners/drivability and make enough power to move out a 3800# vert.

Specifics :
W2W Callies forged 347ci LS6
WCCH 71cc CNC Stage 2 LS1 heads
ATI P1SC @ 8.5psi
NX MAF wet nitrous, 50 shot jets
'04 LS6 cam
dynapack dyno (bolts to the wheel lugs)
low bottle pressure, ~800psi
Continental 3400 stall/Toy Shop built 4L60E
...more details about my setup on my website (link in sig).

I was anticipating running out of fuel at the top end, which I am. 42# injectors and Walbro 340 in-tank aren't cutting it past ~6000rpm.

Results : on 8.5psi boost it made 517rwhp/628rwtq.
On 8.5psi plus the 50 shot it made 564rwhp/743rwtq

I was looking for the converter torque spike since the torque number was pretty high, but there really isn't one on the chart. It makes that much torque and then slowly drops off, there's no "converter flash" hump in the line. Supposedly this has to do with the dynapack dyno and the way it measures power. The converter was unlocked for all the pulls.

The bottle pressure was low, ~800psi. Couldn't wait for the heater anymore, and bottle was probably about half empty, so the n2o number could probably come up a little with a 1100psi bottle. Need more fuel before I try to make any more power with either more boost or more n2o. Maybe next summer I will take the plunge with Nasty Nate's fuel setup.

Overall I'm really happy, and the car feels great ! Here's the dyno graph :



The little 50 shot made ~48rwhp and 114rwtq, haha !! Did I mention this was through CARB legal shorty headers ? I bet I could pick up about 50rwhp switching to long tubes.

Cheers !
Rob (Bad30th)

 

not bad, especially though that exhaust.

 

Gotta love dual power adders.