HP question
Thread Starter
Intermediate
Joined: May 2018
Posts: 45
Likes: 7
From: Ohio
HP question
Hello all,
I am looking at a 13 GS automatic with following mods - headers (not sure brand), into high flow cats into chevy dual mode exhaust - aftermarket intake (not sure what brand) and dyno tune.
Based off anyone that has done similar mods, what would you expect the gains to be? They are advertising 500hp which I assume is at the crank, not the wheels. Does this seem realistic?
I will be asking to see the chart, but just curious?
Thanks,
I am looking at a 13 GS automatic with following mods - headers (not sure brand), into high flow cats into chevy dual mode exhaust - aftermarket intake (not sure what brand) and dyno tune.
Based off anyone that has done similar mods, what would you expect the gains to be? They are advertising 500hp which I assume is at the crank, not the wheels. Does this seem realistic?
I will be asking to see the chart, but just curious?
Thanks,
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,149
From: SW Florida
2021 C6 of the Year Finalist - Modified
2013 GS / A6 with NPP mufflers rated at 436 Net HP
15% A6 drivetrain HP loss = 371 RWHP (dyno)
Aftermarket headers and dyno tune will give about a 35 RWHP increase over stock = 406 RWHP
_____________________________
Don't have any idea what RWHP increase an aftermarket cold air intake will give (but it's not much).
15% A6 drivetrain HP loss = 371 RWHP (dyno)
Aftermarket headers and dyno tune will give about a 35 RWHP increase over stock = 406 RWHP
_____________________________
Don't have any idea what RWHP increase an aftermarket cold air intake will give (but it's not much).
Melting Slicks
Joined: May 2003
Posts: 3,490
Likes: 68
From: Hewitt NJ
Depending on the tune (and headers, intake) I can see it putting down 410-415 RWHP since it's an auto. I suppose it could have 500 HP at the crank, but that's probably pushing it. I would say 475-480 HP at the crank is a more realistic number given the mods.
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,149
From: SW Florida
2021 C6 of the Year Finalist - Modified
Here is a Dynojet printout of my 2011 GS / A6 with NPP exhaust.
Only mod was a set of Pfadt headers with cats and a dyno tune:
Attachment 48338516
Only mod was a set of Pfadt headers with cats and a dyno tune:
Attachment 48338516
