Answer to the 390 H.P Cobra!!!!

[MiracleMax]

Originally posted by HawkCMC


Max that is a good comparison and I'm not bashing it, but thats factory ratings, 2001 and 2002 ls1's are putting an average of 315 to the rear wheel. Which equals about 370 to the crank with 15% drivetrain loss.

So .... 346 cid @ 370 = 1.069 hp per cid

Well its the only reliable figure I have. If this is the case then the manufacturers are playing that number's game again (Ford included with the S/C cobra) which makes a valid comparison nothing but bunk!

As for factory ratings, I believe that they are the best average power produced by the engines (to acount for production tolerences) at whatever SAE testing method is in use now. If I'm not mistaken (which could very well be the case), current OE engine dyno runs call for 80 degree cell temperatures rather than a cool 70 or 68 degrees. I dunno if humidity and vapor standards were adjusted too.

I'd very much like to see a stock LS1 tested on an engine dyno using whatever standard most engine builders use currently. If I were to lay down the rules for the engine test. I would say blueprint them and run'em with accessories and stock exhaust.