Hi guys. This has probably been covered but I couldn't find much info on the subject. Maybe I need to improve my search terms.

Anyway, can someone speak to year over year differences that might allow for a 2013 being faster than a 2008? I get that the '08 is faster than the '07 due to the switch from LS2 to LS3. The HP ratings for '08 - '13 are the same....430 (436 with NPP). What tweaks, if any were done to the engine or any other components that might make a bone stock 2013 faster than a bone stock 2008?

Thanks

 

Here's a link to model year changes, which may or may not help.

https://www.corvetteforum.com/forums...post1580332846

 

All stock base 2008 to stock base 2012, there is none.

If we start weeding in transmissions, and them say packages, then a Z51 or Gs module with a MZ6/diffeent diff gearing, will be faster than a A6 auto.

Hence the auto has a torque converter that robs about 25RWHP, and the Mz6 is a lower gear ratio'd in the first few gears instead.

Now the big one, and that is after market tuning. Yes, just a tune will get you about 20more HP at the crank, but that is not the big one with the tune.

In stock tune, the tune uses the torque management to hold back instant HP to the wheels, to help save the drive line from driver abuse.

So touching nothing more than just de-hobbling the TM table values that is holding back instant power to the ground, this alone make a huge differences if one car will be straight line faster then the same car with TM still holding back instant power instead. The extra 20'ish HP you gain via the tune, is just icing on the cake isntead.


As for top end speeds, again, auto or manual makes a difference, since the torque convert robs around 25hp.
Also when it comes to top speed, a narrow body car cuts through the wind better than a wide body car.

If we get into tuning again, stock motor wants to go flat about 5.4K rpm (gm did this to make you want to shift early), while with a touch of final tweaking, you can get the same motor to pull hard all the way to 6.2K instead. Also, there is Throttle remapping, that helps increase the amount of instant HP to the ground as well.