Totally stock - 1,300 miles on the odometer:

202.1 WHP (252.6 crank horsepower) @ 5,700 RPM (8% less than advertised)
216.3 WTQ (270.4 crank torque) @ 4,200 RPM (10% less than advertised)

The V8 sure does SOUND good on the dyno though...

Scott

Did you contact Pontiac with these numbers? They might have something to say regarding the results.

Why does my gut tell me that things are about to change a bit?

Does the Northstar develop more power after a break-in period?

I know the LS1 has a reputation for developing significantly more power as miles increase - mine continues to feel faster even though I got it at 30K miles.

Do we know if the 4T80 has higher drive train lost, than 4T65 - especially with 3.73 FDR?

Does any one have Dyno'* from a similar caddy?


What is the PCM like?

I know the SSEi and new GTP PCMs are extremely restrictive - but that appears to be due to torque limits of transmission. The 4T80 is supposedly good for 300 ft/lbs and the 4.6 is more a high power than high torque engine.

So, when will see PCMs?

I have heard that this engine/transcombo is capable of much higher rpms - although this version of the Northstar may not generate enough torque beyond stock shitpoints to yield more power.

I say heads/cam from the caddy hot rod fabricators - or better yet a custom instense grind and valve/port job

How about developing a turbo or MP112 kit?

Would love these to work with new Northstar VVT too. I am probably replacing my SSEi with an SRX V8 later this summer or early fall.

Yep, it roared like a lion. Unfortunately it ran like a kitten.

BadSSEI States:Totally stock - 1,300 miles on the odometer:

202.1 WHP (252.6 crank horsepower) @ 5,700 RPM (8% less than advertised)
216.3 WTQ (270.4 crank torque) @ 4,200 RPM (10% less than advertised)

Question: Was forced air used to simulate car movement? If not, your #'* are less than what they should be.

Ummm...yea, he knows.

Probably why the General is planning to supercharge that engine next year.

Beat them to the punch Scott.

Scott, I didn't check the math but when I had my Aurora, few members dyno'ed them and couple of STS'* too and we came to the conclusion that the 4T80e trans has a 24% loss, just FWI.

Here where my #'*
Baseline---------190.0HP---196.7TQ
+Intake ----------198.3HP---202.9TQ
+80mm TB-------206.7HP---214.0TQ

At the crank 271.9HP 282.8TQ

Taylor, wasn't your Aurora a 4.0 L ?
Pretty good compared to the 4.6 L GXP.

Like Will, I think Scott will have that puppy singing a sweeter song real soon.