Do you believe it?
Thread Starter
Drifting
Joined: Mar 2012
Posts: 1,273
Likes: 49
Do you believe it?
Does anyone have a subscription to GM high-tech performance?
In their latest edition, they tested a new 2012 GS centennial edition and it made 415rwhp and 409rwtq. They didn't believe it themselves so they did 3 pulls and all within 1 hp of each other. Very impressive!
Anyone who knows about this magazine knows they are very reputable.
They even go on stating the ls3 dry sump should be re-certified haha.
Anyways, given the average 12% drive train loss, you are looking at around 470hp to the crank.
So, what are your thoughts?
I looked on the Internet and I can't attach a link.
In their latest edition, they tested a new 2012 GS centennial edition and it made 415rwhp and 409rwtq. They didn't believe it themselves so they did 3 pulls and all within 1 hp of each other. Very impressive!
Anyone who knows about this magazine knows they are very reputable.
They even go on stating the ls3 dry sump should be re-certified haha.
Anyways, given the average 12% drive train loss, you are looking at around 470hp to the crank.
So, what are your thoughts?
I looked on the Internet and I can't attach a link.
Team Owner
Joined: Dec 2003
Posts: 57,408
Likes: 164
From: queensbury ny
Good numbers for sure.I'm sure that if they were using 3 different dyno's instead of one that would give them 3 different numbers though.So who knows if their number are completely accurate.
Team Owner
Joined: Oct 2007
Posts: 26,745
Likes: 694
From: PA
My thought is you cant compare a dyno of one car from one place to another car from a nother place. Also, you can make a dyno read what you want it to. Not calling B.S. on the numbers but they seem extremely high. Also, I would put the manual cars closer to 15% and the automatics closer to 18-20% drive-line loss.
Numbers can be manipulated very easily and a dyno should only be used to track your gains from modifications.
Numbers can be manipulated very easily and a dyno should only be used to track your gains from modifications.
Race Director
Joined: May 2008
Posts: 10,742
Likes: 629
From: Manheim Pennsylvania
Cold dry day and a high pressure weather system. It would be interesting what dyno numbers come up on a standard day (15C/58F, 1013.2 MB/29.92 inches). I would assume that rated HP is computed with standard day numbers.
Team Owner
Joined: Oct 2007
Posts: 26,745
Likes: 694
From: PA
Thats all well and good but that car on another dyno wont make those same numbers, you get that, right? Each dyno is different and weather is a huge determining factor. Plus, they can "play" with the dyno to have it read whatever they want.
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Thread Starter
Drifting
Joined: Mar 2012
Posts: 1,273
Likes: 49
Yeah I understand. Don't kill the messenger, lol. I was rather taken back in the numbers and have a bit of interest in this since I actually own this car. I guess the real test will be to take it to my buddies shop with a dynojet and see what I can actually get.
Team Owner
Joined: Oct 2007
Posts: 26,745
Likes: 694
From: PA
Not killing the messenger. 
The fact is a lot of cars are rated low from the factory.....case in point the Challenger SRT8 with the 6.4 Those things are rated at 470/470 but are putting 430/420 hp/tq from the factory. One reason I didnt buy one is they havent cracked the tune on them yet.
Anyway.....I am not doubting that is what their dyno was showing but I do doubt the actual numbers. I think the highest I have seen anywhere on the net for an LS3 is mid 390s, 20 give or take HP is A LOT considering some LS3s are in the 370-ish range.
The fact is a lot of cars are rated low from the factory.....case in point the Challenger SRT8 with the 6.4 Those things are rated at 470/470 but are putting 430/420 hp/tq from the factory. One reason I didnt buy one is they havent cracked the tune on them yet.
Anyway.....I am not doubting that is what their dyno was showing but I do doubt the actual numbers.
I think the highest I have seen anywhere on the net for an LS3 is mid 390s, 20 give or take HP is A LOT considering some LS3s are in the 370-ish range.
Will work for HPDE time.
Joined: May 1999
Posts: 2,560
Likes: 7
From: Orlando FL
Go run it on a track. That will confirm how much it's putting to the ground. Should be around 118-120 trap @ 415rw.
Le Mans Master
Joined: Dec 2008
Posts: 6,612
Likes: 493
From: brooklyn ny
Racer
Joined: Mar 2011
Posts: 325
Likes: 6
Last year GM performace offered a crate engine model 376/480. This is a stock LS3 motor with the LS Hot Cam. This year they offer one called 376/525. This model has the ASA cam and different valve springs. Looking at the dyno charts it looks like the LS hot cam makes it peaks about 100rpm sooner than the stock cam. The good thing about this cam is you do not have to change valve springs just swap the cam.
