adnano

hi guys .i have a zo6 2009 and its a stock until now i need more horse power without supercharger or blower .... what can i add... im thinking about after market heads or ls7 ported heads?? who can help me ..if anybody have a nice stage for me and no problems with the prise ,,,??? thanks

adnano

some people tell me about adding american racing headers and cold air intake with diablo sport screen touch then make a tune and im thinking abouth after market heads ,,, i need some one to tell the right way to have a nice hp for street race with stock engine,,,

DietCoke

iTrader: (18)

Stock LS7 heads aren't perfect, but they're pretty good. Headers and a camshaft will add a solid 100 horsepower to the wheels.

Tainted

iTrader: (9)

supporting mods should ALWAYS come first or you wont see the full benefit of more serious mods like heads/cam.

Longtube headers, X pipe, cold air intake, DYNO tune (I swear to god those handheld tuners are a pos I have no idea why people bother with those unless you want it for making adjustments for tire size etc on the fly.)

Those few mods right there are good for a solid 50rwhp

whatcop?

Headers on a C6 Z06 are pointless unless you have a cam. Intake and a dyno/street tune will net you 40-50whp. A cam is good for another 25-40 depending on how aggressive you want to go. Mufflers are also pointless for power, but will totally change the sound of the car.

Heads are a different ball game. The guy you really want to talk to is Richard from WCCH. If I am correct just porting the heads can get you about 20-25hp on a stock Z06.

In the end when everything is done you will be putting down 550-615whp depending on how aggressive you go.

litle88

iTrader: (20)

A vararam intake, long tubes, WCCH Ls7 heads ( you can send them yours) and contacting Straightline in New Lenox----> they are a sponsor here.

Talk to Nick those guys have been working with Ed Curtis on a cam and it's making some good hp on their mustand dyno. Just my .2

Gunslinger09

Yeah headers are pointless....

No headers are a necessity on any performance vehicle. All motors are big air pumps, the more air you move the more power you make. You can only get as much air/fuel into the motor as you can efficiently get exhaust out. Good headers will flow more than any stock exhaust manifold.

whatcop?

The stock exhaust manifolds flow more than enough for the motor. You only need them once you put a cam in the LS7. Numerous people have dyno'd and seen no results or >5hp gains. The guys that claim to have gained from headers are the same guys that also got a tune for the first time on the car while installing headers. All their gains were strictly from the tune.

Gunslinger09

Um.... Yeah.

whatcop?

Your first hand experience with the C6Z would be what? Staring at one at the dealer when you bought your Gen 5? I don't mean to be rude man, but you are killing me here.

good2go

The stock LS7 exhaust manifolds are VERY good. You really don't need to change to headers till you do a cam swap and decked/ported heads. On my 07 Z06 I first did supporting mods, intake, 160, tune, ported intake and throttle body and gained about 50 rwhp.

I added headers, retuned and gained 5 rwhp. Whoopie.

I then added a big cam, gained another 50, then ported and decked heads and ended with 572. I started with 440.

Of course, I couldn't stop there and added a 100 shot of nitrous.

Gunslinger09

Even if you don't get a huge peak gain headers will help flatten out the curve. Don't get wrapped up in the high spots, its all about area under the curve.

427 zeo6

American Racing long tube headers, freeer flowing mufflers and a Halltech intake will net you around 50-65HP with a talented tuner.

good2go

Seriously, on a HP/$ ratio, headers Vs. stock Z06 manifolds SUCK! I gained 5 peak rwhp and about 5 rw torque mid band with ARH's, a bud used LG's and gained 3 rwhp peak and about 5-8 rw torque.

You really have to increase the engine flow a lot to make headers necessary on a C6 Z06.

Tampa Tuning

iTrader: (2)

You may like the car with adding just the bolt ons, If that doesnt address your needs, a nice cam will make the car scary after the bolt ons.

www.TampaTuning.com
Phil

whatcop?

Good2go do you have the dyno sheet by any chance?

Just so you know Gunslinger09 my car is the same way. There is nothing to gain out of headers. I push too much force that the stock manifolds once decatted do the same thing as headers.

good2go

lowest run is stock, then with all boltons, then with cam, then heads, then nitrous.

whatcop?

^^^very nice

gto_ua

Get some good camshaft kit from Ed Curtis - Flow Tech Induction

+ Kooks or ARH 1 7/8 headers with X-pipe

Good CAI - Halltech Super Bee.

FAST LSXR intake manifold will also add proven 10-15whp.

Of course custom tune by some reputable tuner.

If you want more - MAST 305cc Black Label LS7 heads with Titanium valves or All Pro LSW-12 285cc LS7 heads.

All other heads are not worth changing from your existing stock LS7.

Best ported LS7 heads will gain not more than 20whp(with all supporting mods).

Mez

iTrader: (1)

Reckart Performance Tuning in Austin has done a lot of Z06 cam and headers installs.

First, headers with out a cam does not make enough power to justify the cost.

Second, a cam with headers do make enough power to make it worth while. Halltech Killer Bee is a MUST.

Thirds, a big mistake is to over-cam the LS7 engines. While a big cam will show peak rwhp ~600 rwhp, it can absolutely kill the torque curve. For example, Reckart swapped out a big cam that made ~606 rwhp with one that was much smaller. The new cam made only ~10 rwhp less but it gained 70 rwtq at 3000 rpm over the big cam. Why? Dynamic compression, my man.

The smaller cam made more torque thus rwhp up to about 6000 rpm. The smaller cam had no surge at cruise and at the end of the day, it was brutally fast because the torque curve jumped at 3000 rpm and stayed up there until 6000 rpm. Now it was not a tiny cam but it was not huge either.

If you are building a car where it runs 98% of the time between 3000-6000 rpm, forget the big cams because not only will the car will be sluggish and a PITA on the street but it will be slower, too.

When I look at a dyno sheet, I only look at the torque curve. A great combination will be high, flat and wide.