maxspeed05V

iTrader: (4)

headers and cats are only holding you back 10 maybe 15 hp tops.

If you want more hp swap in a bigger cam.

Patrick G

iTrader: (14)

You guys really don't realize how restrictive the manifolds and cats are on a CTS-V. Plus, the stock flywheel is super heavy which also drops the numbers. Compared to an F-body with a lighter flywheel, a lighter driveshaft, lighter wheels, an underdrive pulley and a much more dyno-friendly rear end, the CTS-V is at a fairly large chassis dyno disadvantage.

I'm not making excuses, but even on the same dyno where James Day made 430 in his wife's Camaro, the V's dyno a lot less (because of all the things mentioned above). It's one thing to make comparisons from one dyno to another, but it's even more difficult when making comparisons across vehicle platforms.

Jon04CTSV

Ahh, well that makes sense

maxspeed05V

iTrader: (4)

even with the extra drivetrain loss on the V it should still make more or at least the same power as a f-body because of the better heads.

Jon04CTSV

I guess we'll see when mine goes in... I'll be very disappointed if I'm at 380...

And that F-bod had a LS6 long block dropped into it, so I'm guessing it would have had the same heads.

itsslow98

iTrader: (18)

Take look at my thread 05 v dyno numbers. a c5zo6 dynoed 10 minuted after mine came off the dyno and put down 22more hp then my V with the SAME exact mods, identical cam and all but has a ported throttle body and 25% u/d pulley whi ch i dont, so id say were giving about 10hp more drivetrain loss at most.....not as much as youd think.

I also picked up 22rwhp(shop dynoed my car before they threw the cam in) from kooks 1 7/8 before the cam so maxspeed id have to disagree with you on 10-15. and that was with high flow cats as well, off road pipes id expect about 25.

whisler151

Remember, his cam is pretty small. He may not gain that much with the headers.

maxspeed05V

iTrader: (4)

yup thats exactly what I said on the other forum. If anyone remebers my first baby cam I made 360hp, then with headers I made 374 which isnt that much of a differance.

Jon04CTSV

Specs on that cam? I dynoed 360 with headers. If that's the case I'm not gonna install the cam for 14rwhp.

whisler151

If you are 360 now I would guess 380 with your cam...maybe 385 on a good day.

DoesSpeedTurnUon

iTrader: (17)

My header only tuned car made 362rwhp. Headers is where its at. And my most fun mod thus far.

Jon04CTSV

lol in that case I'm selling the cam when it gets here.

maxspeed05V

iTrader: (4)

you cant compare my dyno numbers with yours because they are totaly diffrent dynos . All you could compare is gains over stock on the same car, same dyno.

And my car only gained 15 hp from headers.

If yours made 360 then congrates, but all it means is without headers your baseline was high , maybe 345 .

itsslow98

iTrader: (18)

Very true i baselined 343 but that was with muffler delete and CAI tuned. I did 365 with headers and the mods above. Then 400 with the cam.

AWDTBSS

if ur not gonna install the cam for 14whp then theres really no other mods worth doing then HP wise

1bad2k

iTrader: (10)

LOL unfortunately thats about all the cam gave him. So I would say that is a worth while amount.

whisler151

That's why I went with Kooks and Monster clutch with 18lb flywheel.

Seriously, if you want to hit 400 get a bigger cam. You can still pass emissions, I do every year. You will be disappointed with your cam. I know I would be if I was cammed and below 400.

2manycars

iTrader: (7)

I'm surprised no one said this yet...


Pics of said implants or expert status is re-nagged and a permanent ban!

Patrick G

iTrader: (14)

You can't go to a bigger cam while still running manifolds. The gains will not be very big. You'd have too much overlap and exhaust reversion would be contaminating the intake charge. You need to let a cammed motor breathe. For the guy who gained 25 with headers, remember, his gains were with a stock LS6 cam. Run a cam like the 222/226 .597/.598 115LSA cam and you will gain over 30 with headers. The bigger the cam, typically the bigger the gains by running headers.

itsslow98

iTrader: (18)

your still not gonna make 400 with headers and the cam the OP has. maybe 380-385.