Ls2 dyno results. Is this good?

[black67malibu]

So I got my motor off the dyno this weekend and here's the results...


It's a stock 06 GTO ls2
Ls6 manifold
Fast 92 throttle body
Nutter racing cam
GM performance valve springs and retainers
Aftermarket pushrods.
GM 36 pound injectors
Not sure on the headers cause he used shop headers

It got a peak HP of 506 @6,000rpm and 481ft @5,000 rpm's
I tried to post the dyno pic but couldn't figure it out from my iPhone

Are these decent #'s? He also said his dyno reads 10-15% lower than other dyno's in the are.

[WSSix]

What are the cam specs? I would say you're numbers aren't bad considering you've picked up a little over 100hp from a cam and basic bolt ons. However, without knowing the cam specs it's just an educated guess.

Better question would be are my curves good? When does the torque come in and at what level? When does the torque fall off? HP, same thing? For a street car, you want broad curves regardless of the peak numbers. Focusing on the peak numbers is only for bragging rights not getting you down the road enjoyably. You want torque to be flat and broad and to be there when the throttle is fully opened. You want HP to steady increase from the moment the throttle is hammered or very shortly there after if you do the pull from low RPMs ~2000rpms.

Getting the curve posted would be best if you can.

[black67malibu]

I'll try and post the graph. I forgot to get the cam card before I left. I'll get spect Monday when they re-open

[black67malibu]

I hope this worked

[Matt@BOS]

I had an LS2 with the same basic bolt ons and it made about the same power on an engine dyno, but with it in the car, factoring in accessories and drive train loss, it made around 400-420 rwhp.

Edit - the graph came out really small.

[black67malibu]

Hope this is better... @Matt.a that seems like a lot of drive train loss.

[Matt@BOS]

Originally Posted by black67malibu

Hope this is better... @Matt.a that seems like a lot of drive train loss.

It might seem like a lot of drivetrain loss, but remember that comparing a stock LS2 at 400hp to a modified one that was tested on an engine dyno is a bit of an apples to oranges comparison in most cases. Generally engines tested in a dyno cell are tested without any accessories. I bet a bone stock LS2 would make 425 next to your engine. On a loaded chassis dyno, I bet yours makes about the same power.