flynlow99

I was just wondering just how much horsepower and torque would you guys think i have on my 2006 C6 Corvette, I have add the following mods to my car.
1)SLP Blackwing cold air induction
2)Granatelli Mass Air Flow Sensor
3)Vararam Throttle Body Spacer
4)SLP 160* Thermostat
5)SLP Header Package, 1-3/4" Long Tube w/Cats/PowerFlo-X Crossover Pipe
6)SLP PowerFlow Exhaust System
and
7)SLP Custom Tuned DiabloSport II Programmer

I would appreciate any feedback, thanks

mcwire

Hi, and welcome to The Forum. It's a great group of Guys, and Gals, with loads of knowledge, and information. - I'm sure that someone will answer your questions, soon. -- --

ALVetteFan

Welcome to the Forum. I have not completed any performance modes yet, but I am sure you can get you answers here.

flynlow99

Thanks, I appreciate it

keyplyr

Manual, maybe 360 to 370

Auto, subtract 20%

Mark VerMurlen

I had almost the exact same mods on my 2002 LS1 and its power was bumped up about 50 HP. Its going to depend on getting the air/fuel ratio correct. You should really put it on a dyno and then you'll know for sure what the HP is and if the fuel/air ratio is correct. You can have a dyno run done for you for not a lot of money. After what you've spent already, it would be worth getting a dyno readout to make sure everything is good.

- Mark

flynlow99

Its an Auto and when you say 360 to 370 do you mean 60 to 70 more horsepower to the stock 400 hp

keyplyr

No that's that not what I mean.

Horsepower at the flywheel is what's advertised. In your case, a 2006 Corvette is said to have 400hp.

Most of us here in these forums compare rwhp (rear wheel horse power) which is what is transferred to the ground. This is "real" power since it is what is actually put into affect.

Both the manual and the automatic loose hp through the drive train. The auto trans will loose more hp than the manul (up to 20%)

So 400 - 20% = 320
plus your mods will add up to maybe 360 total rwhp

(a gain of 40hp with your mods is high and considers a tune)

mcwire

-- I believe that he's talking - rear wheel horsepower (RWHP) = power to the ground vs flywheel horsepower. - Remember, there's a HP loss, through the drive line. -- Yep - beat me to it. -- --

keyplyr

That happens to me all the time.

BOB EAGAN

Your mods are worth approx. 40 RWHP, TQ about the same. Typical C 6 autos get 330-340. You should expect to see 370-380 RWHP/TW on a Dynojet. I don't believe items 2, 3, 4 and 6 add much.

keyplyr

However, I feel Dynojet results are high and do not reflect actual numbers (as much as some of us would like) that's why I estimated 360.

flynlow99

I appreciate the reply but im pretty new at all this and thats why im confused so forgive me for being a pain but SLP advertises item #'s 1, 4, 5, 6 and 7 as their 465 HP Performance Package, but yet like you said i probably gained about 40 horsepower, why is that?

C7-Beast

SLP numbers are based on flywheel HP and are probably on the high side. Most of us could care less about flywheel HP it only matters how much power you put to the ground. Typical driveline loss is 15-20%. So, even if it was 465 at the flywheel subtract 20% if you have an auto then you are looking at about 370 rear wheel HP. Keep in mind, that is only if the SLP number of flywheel horse power is correct at 465. To me that number looks a bit inflated. I'm guessing with those items like others have said you'll gain about 40 horse power at the flywheel so take 440 and divide by 20% and you are looking at about 352 at the rear wheels. There is less driveline loss if you have a manual transmission.

glennhl

Manual 360 to 370, but auto subtract another 5% from the manual numbers. (Manual typically 87%, auto around 83% overall)

By your numbers a manual would be 370 and an auto only 296 (my auto did 335 stock and 365 after headers)

candlemuse

Probably more than any other car in your rear view mirror.

keyplyr

No, that's not what I said.


Manual after mods = 370

Auto after mods = 360 (400 - 20% = 320, after mods = 360)

lvjetboy

Components often advertise hp gain not necessarily typical. Engines do best when all parts are matched and tuned. If you add a number of optimistic mfg claims then expect to see the best? Not likely.

As for manual vs. auto. Why do some even mention drive choice? Or RWHP vs flywheel? I think that's a distraction from the real question which is based on a delta.

Let's say an auto drive looses 5% more than manual from flywheel to RW. Then let's say flynlow99 expected to see a net gain of 50 hp. If his mods gained that entire 50 hp, manual vs auto would only show a 2.5 hp difference at the rear wheels on the dyno...if he spent the money to dyno and if the calibration and test conditions allowed a repeatable resolution of 2.5 hp. Com'on people.

I'm thinking a 2.5 hp difference from drive train choice can easily be within dyno measurement error (noise) So drive choice (manual or auto) is not the reason flyinlow99 got less than he hoped for.

jer

debo

I would also say between 360-370 rwhp from what I've seen on other Vettes. I have the same catback from SLP; how much of a differences did it make with sound after installing the headers to the setup? Do you have any videos? I'm thinking about getting the same headers and was interested in hearing it first.

flynlow99

The sound is Completely different, much louder and much better, its not your normal Borla or Flow Master loudness or any after market exhaust systems, it has a very rich sound where it actually sounds like a sports car. I dont have any videos but in the next day or two i"ll put together a video clip for you.