jmilz28

iTrader: (13)

It's in your tune, for damn sure, to start. What is the duty cycle on the injectors? They are 11 years old...
You also need an LS6 intake.

Address those three things properly and you'll see 360-375 rwhp and that much torque too, pretty easy.

Which headers are they? ARH, Kooks, TSP, custom? There is no downside to the 1 7/8 primaries. LS1s like to breathe, both in and out, just need to tune for it. This is clearly the case with yours.

Don't be surprised if you blow this motor if you got WOT before a GOOD tune.

rigid

iTrader: (5)

He's running the JTR rx7 conversion headers.

The Alchemist

iTrader: (19)

Just like everyone said, keep your foot out of it, and below 3000rpm until you get it tuned. Chances are, being that lean, you probably had 4-6 degrees of knock and might have even gone into the low octane timing table.

HPTuners and a wideband are your friend.

JS01

iTrader: (10)

Holy ****.

"It seemed a little lean also"

I lol'd.

blackedout drop ls1

iTrader: (91)

What happened?

SPDEMON

Well, on a nitrous tune, and an auto trans, with a stock intermediate pipe and a Blowmaster muffler, my car put down 362rwhp.

So yeah, those are low #'s.

Tune needs to be fixed, you NEED an LS6 intake, at least, and if your mileage on the engine is a little high, you may want to check into your ignition/spark/fuel system.

With this setup (if you had a LS6 intake) and a manual trans with a all motor tune, you should see around 375rwhp minimum.

breze84

My buddies 04 GTO with the same Cam 114lsa and 243 heads put down 407/394... Its all in your tune... YOU NEED ONE ..... You should be around 380RWHP