any l67 owners out there that have dynos run before mods? i'm very curious to see the results...

matt

I think that there have been a few that have done this on Glub GP before tearing into there engine to get a base

I think there is a 20% drivetrain loss, so around 192 fwhp.

right. the reason i ask though, is i have this feeling (nagging, really), that the HP is under-rated on the SII, and is almost (if not exactly) the same as the ratings for the SIII.

just a feeling.

The torque ratings are low, the HP seems to be about right, stock L67 usually in the 190-192 fwhp range.

Some performance magazine a few years back did an article on modern day muscle cars, in which they dyno'd them. If I remember correctly, an 01 GTP dyno'd at 196HP and 260lb/ft.

My Rivi is stock, except for a gutted airbox, and I will be taking it to the dyno shop in about a month to get it baselined before getting a 3.4" pulley, Evan'* coolant, new plugs, and a K&N. I will post results as soon as I get them.

If 260 ft-lbs are hitting the wheels in stock form, then the engine in stock form should be pushing well over the factory spec of 280 ft-lbs at the crank, correct?

I've heard quite a few people say the factory torque #'* were low -supposedly closer to 300 at the crank and supposedly someone dyneod in with almost 320 lb ft (crank) on a stock L67.

Yes, the torque is grossly underrated. I've seen someone put out the equivelant to 330ft.lbs. stock before, and it was actually done with a torque managed SSEi, quite impressive. The horsepower is rated just about right, the torque, is rated stupidly low. You would think they would at least rate it at 300ft.lbs. or something, but the tranny can only handle 280, so if the rate the engine at 280, it makes it all better for the tranny.

Shawn

So with a basic pulley/intake/exhaust/pcm 'ed L67 (like mine), it would be putting out WELL over 350 ft-lbs at the crank. Maybe close to 400?