04-20-2015, 09:04 PM | #29 |
Drives: 98 camaro turbo Join Date: Nov 2009
Location: miami
Posts: 293
|
Care to explain how the 5.8l gt500 with 556hp puts down 600rwhp+ stock?
Oh.. let me help. Its really making 700hp. What about the 6.2l hellcat engine? 707hp = 640-650rwhp?? Nope.. guess again. Shall i go on?
__________________
.....
|
04-21-2015, 07:52 AM | #30 |
Drives: 2005 Cobalt Base - 5 speed Join Date: Apr 2015
Location: Ohio
Posts: 444
|
Isn't the GT500 rated to make 662 hp? That would be a 10% drive train loss. Same thing for the hellcat. I know a lot depends on the dyno but maybe we're in the age of only 10% loss instead of the expected 15%? That sure would be great!
|
04-21-2015, 11:59 AM | #31 | |
Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009
Location: Jackson, Michigan
Posts: 4,407
|
Quote:
What I don't understand is how one can guess and extrapolate a hp figure they consider accurate that is based upon a guess on top of a guess. For one you are guessing how accurate the given dyno is and also guessing drivetrain loss. Not to mention readings can vary depending on operating temp, proper air to the engine during testing and tire pressure just to name a few. Also figuring drivetrain loss will only become more inaccurate as horsepower increases. 12% drivetrain loss of a 300 hp motor would equate to about 265rwhp. So in this crude example it takes 35 hp in this make believe car to spin all the accessories, transmission and wheels etc. So now take that same car and put in 600 hp and change nothing else..... Is it now going to take 70hp away going to the wheels instead of 35 like when it had 300 hp? No Drivetrain loss is a guess and so is the accuracy of the dyno. I put more stake in the new sae standards for hp compared to results that vary as much as 30hp from reading to reading across the country lol. |
|
04-21-2015, 12:07 PM | #32 | |
Drives: 2005 Cobalt Base - 5 speed Join Date: Apr 2015
Location: Ohio
Posts: 444
|
Quote:
|
|
04-21-2015, 12:10 PM | #33 | |
|
Quote:
__________________
Current: '17 2SS Hyper Blue, A8, MRC, NPP
Past: '99 SS Camaro A4, '73 Camaro 383 A3 "Voices in your head are not considered insider information." 3800 Status - 6/16/16 (Built!) 6000 status - 6/29/16 (Delivered!) |
|
04-21-2015, 12:15 PM | #34 |
Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009
Location: Jackson, Michigan
Posts: 4,407
|
If there is a 420 rwhp dyno it proves nothing to me. I've seen dynos of them only reading 400rwhp as well.( done by a mag)
If you use that number it's pretty close to 12%. But of coarse owners will focus on the higher reading dynos. See the pattern ? This trickles down to under rating rumors. And don't think for a second some dynos don't read high for happier customers etc. |
04-21-2015, 12:19 PM | #35 |
Drives: 2015 SS 1LE Red Hot, 1970 Chevelle Join Date: Apr 2012
Location: Chino, CA
Posts: 6,989
|
Oh so you know they exact drive train loss for the GT500?
__________________
|
04-21-2015, 12:23 PM | #36 | |
Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009
Location: Jackson, Michigan
Posts: 4,407
|
Quote:
Doesn't talk about testing conditions but that will point u in the right direction. I would say just look up the new standard code and some details should be available. |
|
04-21-2015, 01:39 PM | #37 | |
Drives: 2005 Cobalt Base - 5 speed Join Date: Apr 2015
Location: Ohio
Posts: 444
|
Quote:
Really? I would think that FI engines would be less influenced by atmospheric conditions vs NA, since you're forcing the air into the engine as opposed to just whatever the engine can grab. Interesting, learn something new every day! |
|
04-21-2015, 03:09 PM | #38 | |
|
Quote:
I'm sure someone on here can give a better explanation on the effects. This is just my limited understanding of the situation.
__________________
Current: '17 2SS Hyper Blue, A8, MRC, NPP
Past: '99 SS Camaro A4, '73 Camaro 383 A3 "Voices in your head are not considered insider information." 3800 Status - 6/16/16 (Built!) 6000 status - 6/29/16 (Delivered!) |
|
04-22-2015, 08:19 AM | #39 |
Drives: 2013 A6 GT 5.0 Join Date: Nov 2009
Location: Edmond, OK
Posts: 2,909
|
If the car has a weight of 3700lbs with a 8L90E and 450HP/460TQ LT1 like predicted then we will see mag times in the 12.4-12.6 range with hero runs in the high 11's. You can quote me on this and we can revisit in a year. Add 400lbs to the Vette and that is what you get or replace the 6L80E with the 8L90E (already proven to be worth .1 tenth) remove 200lbs and add 50HP/50TQ to the 5th gen L99. I don't even bother with 0-60 times anymore.
__________________
BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.
|
04-22-2015, 04:43 PM | #40 | |
|
Quote:
Extrapolating real engine numbers from chasis dynos used to be the only way to see truly if manufactures were under rating but even then those estimates were just as inaccurate as they are now. The only accurate ratign system in the US are SAE certified numbers. This why high end shop that develop cams use engine dynos for testing and developing. Back to the topic... LT1 C7 (3300lbs) - 0-60 = 3.8. 1/4 =12.0 LT1 Camaro (3700lbs) - 0-60 = 4.1 1/4 =12.4 All of the magazines I've seen show the 1LE faster than the SS in 0-60 times because of gearing and sticky tires. So the SS could range 3.9-4.2 depending on gearing and tire options.
__________________
Used Racing Brake 2 Peice Rotors for sale:
http://www.camaro5.com/forums/showthread.php?t=344754 Summit White 2014 2SS 1LE Recaros, NPP exhaust, Nav 2010 2SS A6 - sold. |
|
10-02-2015, 11:25 PM | #41 |
Drives: 2006 Honda accord v6 6sp manual Join Date: Apr 2015
Location: Florida
Posts: 41
|
Ok Guys the thumbnail analysis was pretty good.
SS 6 speed manual, 0-60 4.3, 1/4 in 12.3 From what I can tell the stang 5.0 6M is 4.5 and 12.9 or 13.0 Challenger Scat Pack is 4.5 and 12.5 I understand the auto is quicker but as Jay Leno would say you need a proper gear box |
10-03-2015, 06:58 AM | #42 | |
|
Quote:
Sent from my SAMSUNG-SM-N900A using Tapatalk
__________________
Current: '17 2SS Hyper Blue, A8, MRC, NPP
Past: '99 SS Camaro A4, '73 Camaro 383 A3 "Voices in your head are not considered insider information." 3800 Status - 6/16/16 (Built!) 6000 status - 6/29/16 (Delivered!) |
|
|
|
Post Reply
|
|
|