Need hp/torque #'s (Cobra, LS1, etc)
Thread Starter
2nd Gear Member
Joined: May 2008
Posts: 311
From: Liberty City, FL
Need hp/torque #'s (Cobra, LS1, etc)
Ok, I just put it all on "paper".... Help me out filling in the blanks...
Year Model Engine HP RWHP Torque Misc
2004 GT 4.6 260 ? 303 2v
2004 Mach 1 4.6 310 ? ? 4V
03-04 Cobra 4.6 390 ? 390 4V
05 GT 4.6 300 ? 320 3v
02 Z28 LS1 345 ? ? 2v
Year Model Engine HP RWHP Torque Misc
2004 GT 4.6 260 ? 303 2v
2004 Mach 1 4.6 310 ? ? 4V
03-04 Cobra 4.6 390 ? 390 4V
05 GT 4.6 300 ? 320 3v
02 Z28 LS1 345 ? ? 2v
2nd Gear Member
Joined: Aug 2007
Posts: 227
From: INDY
RE: Need hp/torque #'s (Cobra, LS1, etc)
Just stick to the simple mathematic calculations of % drivetrain loss. Older auto's are known for approx 18-20% (higher in some cases)loss through drive train while manuals were between 12-15%. I dunno about the newer trannys since the technology in them has come pretty far. I'd estimate about 15-18% for the newer autos and I'd assume manuals are probably still in the same range.
is my username.
Joined: May 2006
Posts: 13,808
From: Earth
RE: Need hp/torque #'s (Cobra, LS1, etc)
ORIGINAL: alexplantman
Ok, I just put it all on "paper".... Help me out filling in the blanks...
Year Model Engine HP RWHP Torque Misc
2004 GT 4.6 260 225-230 303 2v
2004 Mach 1 4.6 310 270? google 4V
03-04 Cobra 4.6 390 360-375 390 4V
05 GT 4.6 300 268 320 3v
02 Z28 LS1 345 infinite planet moving 2v
Ok, I just put it all on "paper".... Help me out filling in the blanks...
Year Model Engine HP RWHP Torque Misc
2004 GT 4.6 260 225-230 303 2v
2004 Mach 1 4.6 310 270? google 4V
03-04 Cobra 4.6 390 360-375 390 4V
05 GT 4.6 300 268 320 3v
02 Z28 LS1 345 infinite planet moving 2v
6th Gear Member
Joined: Sep 2006
Posts: 5,565
From: NC
RE: Need hp/torque #'s (Cobra, LS1, etc)
From my friends bone stock 99 LS1 M6
311.93rwhp 320.75rwtrq.
http://dfw.derbyworks.com:8088/mattc...ineResults.JPG
311.93rwhp 320.75rwtrq.
http://dfw.derbyworks.com:8088/mattc...ineResults.JPG
5th Gear Member
Joined: Jun 2007
Posts: 3,748
From: Wheeling, IL
RE: Need hp/torque #'s (Cobra, LS1, etc)
I've seen a lot of 03/04 Cobra's dyno 370-380 RWHP and RWTQ.
They are underrated from the factory. That was announced a while ago. They actually have 430 HP and 430 TQ from the factory. Deduct about 10-12 % of reduction for drive-train loss. Even deduct 15 %.
I agree with the GT"s making about 265-275 stock.
They are underrated from the factory. That was announced a while ago. They actually have 430 HP and 430 TQ from the factory. Deduct about 10-12 % of reduction for drive-train loss. Even deduct 15 %.
I agree with the GT"s making about 265-275 stock.
6th Gear Member
Joined: Dec 2004
Posts: 15,865
From: Ludlow, Mass
RE: Need hp/torque #'s (Cobra, LS1, etc)
ORIGINAL: mac10chap
i thought the z28's were rated at 305HP and the the SS was rated at 320....am i wrong???
i thought the z28's were rated at 305HP and the the SS was rated at 320....am i wrong???
i thought s197s were areound 260 rwhp?
6th Gear Member
Joined: Sep 2006
Posts: 5,565
From: NC
RE: Need hp/torque #'s (Cobra, LS1, etc)
ORIGINAL: mac10chap
i thought the z28's were rated at 305HP and the the SS was rated at 320....am i wrong???
i thought the z28's were rated at 305HP and the the SS was rated at 320....am i wrong???
Z28 - 305/310
SS - 320/325 with the SLP 'Performance'package at 330/345hp