Just got back from Kenny Brown Performance with my dyno results:

311.1 RWHP
327.5 Max Torque

The guy at the shop calculated the fly wheel horsepower to be 363.7.

Needless to say, I am very pleased with these numbers.

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2001 Z28 M6
Flowmaster 80
K&N FIPK
Jet Stage II
Pro 5.0 Shifter
BMR STB

 

nice #'s, especially torque, but the m6's are rather efficient and lose about 12%, about 40hp. thats seems to be the norm with the newer f bodys

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2000 black WS6 6speed
318 RWHP 322 RWTQ stock
best et: 12.72 with the et streets. 60' 1.81
bestmph: 109.72 first time out, no mods, on the street tires
Mods: centerforce dual friction clutch, moser 12 bolt w/4.10's
BFG dragradials, PRO 5.0 shifter
whats next: put the borla on, take baffles out of WS6 hood, tb bypass, et streets

 

Good numbers, we're pretty similar.

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2001 Formula
307RWHP/331RWTQ

Direct-Flo w/ Holley
!MAF screen
FRA
Flowmaster
Kirban Kwik Six
SLP STB and SFC's

 

Hey guys, just checking out the board. I was wondering what a bone stock LS1 normally puts down on the dyno? I have an aquiantance who claims his stock 2001 Z-28 put down 307wheelHP on the rollers. But he hasn't offered up a sheet nor has he taken me up on racing. I just want some honest numbers.

 

307 rwhp stock would be most likely. Some do quite a bit more, some a bit less. Anywhere from 280 rwhp to 320 rwhp stock, depending on year and transmission.

I did 322 rwhp and 333 tq with a lid, pulley, and GMAF in an automatic.

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2000 Pewter SS #C161
SLP Dual-Dual, Bilstein suspension, Eibachs, 21mm/35mm swaybars, GMAF
SLP CAI w/lower plate, !EGR, Direct-Flo, SLP STB, Ported TB, ASP Crank pulley
SLP/AAM Differential cover, SLP 2600, Powershot, MSD wires, NGK's,
BMR Boxed LCAs, BMR PHB, G2 DSL, Heavy Lead Foot...
http://community.webshots.com/user/murlynd

 

so the 305 crankshaft horsepower GM advertises isn't correct?

 

Only correct if the drivetrain actually GAINS you efficiency, not robs you of it... and that would make GM's drivetrain a miracle worker!

Definitely the 305 crank rating is inappropriate. Closer to 340-370 at the crank.

 

LS1's are under rated as hell
I've heard and read about MANY STOCK TO THE FILTER LS1's pull 300+rwhp all the time. They are supposed to have 325 at the flywheel...yeah rite
They just under rate them so Corvette owners don't feel like they wasted an extra $20k

My buddy was just at a dyno day this past Saturday. There was a new Firehawk that put down 325 RWHP w/ JUST a cutout..NOTHING ELSE!
THOSE are dam good numbers
Goota love the LS1's numbers off of the floor



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97 Black & Orange Z28 A4 - 270rwhp/290rwtq
K&N CAI-Flowmaster-TB Bypass-Airfoil-160 Stat-Cutout-!MAF Screen-
Manual Fan Switch-TransGo-3.73's-Comp TA's (Track Use Only)
BEST : 13.54 @ 100.87 w/ 2.01 60'