Abdullah

iTrader: (2)

Hello, I want to buy an electron blue C6 Z06 corvette. I want to install a TTi street/strip twin turbo kit for that Z06, what heads will make the car quicker and faster (make more power under the curve) the AI TFS LS2 230cc heads or the AI GM LS7 280cc heads.

i'm concerned with port velocity and port flow.

thanks.

slowlsx

iTrader: (28)

Huge difference in ports. If you want a happy medium then here you go! LSA heads are also made of better material and will hold up a little better to boost.

https://ls1tech.com/forums/parts-cla...-complete.html

Abdullah

iTrader: (2)

OK, I want to know, can I bolt LS2 intake manifold with LS2 TFS heads in a C6 Z06 corvette? what about sensors locations in the LS2 and the LS7 intake manifolds can I use the sensors of the LS7 intake manifold to make them work in a LS2 intake manifold in a C6 Z06?

thanks for help.

LosLS2

Why would you want to switch to an LS2 head? Why not got to an aftermarket LS7 head designed for the bigger bore? If you are going to boost, you need to replace the MAP sensor which is the only one in the intake.

If the turbos are sized correctly, you'll have gobs and gobs of power under the curve. More than you can use on the street if you want it.

Abdullah

iTrader: (2)

you mean only MAP sensor is there on the LS7 intake manifold? no other sensors are there?



will I have gobs of power even if port size of the LS7 heads is bigger? I mean with forced induction there is no need for port velocity?

Rise of the Phoenix

iTrader: (27)

I disagree with that. If you are pushing a decent amount of boost, the better the port velocity the better.

5w20

iTrader: (21)

Ai tfs

stevieturbo

Surely if the engine already has an LS7 motor, then the LS7 heads are the only sensible option ?

Port velocity is always a good thing, but camshaft and turbo choice will play a huge part in how the engine feels, over and above port sizes.

djfury05

iTrader: (30)

I'd be more worried about the LS7 block over the head choices. Unless you have that already covered, then that block isn't going to last long with big boost.

Abdullah

iTrader: (2)

what is the hp limit of the LS7 block? all I want to do is around 830 rwhp. I want to drive the C6 Z06 on the street no street racing just racing at the 1/4 mile track.

because my hp goal is around 830 rwhp i'm settling toward AI TFS LS2 230cc with ported GM LS2 intake manifold with stock idle custom cam and a 9.0:1 compression forged 4.00" crank, 6.125" rods and 4.130" pistons in a stock LS7 block. I want to use a street/strip TTi twin turbo kit.

what do you think the boost will be at for the above mods and 830 rwhp.

if i'm going to go for high end horse power I would use the all pro LSW -1 WCCH CNC heads that has 285cc intake ports and flows 410cfm with ported LS7 intake manifold or even maybe beck adequate for my taste sheetmetal intake with big throttle body.

Abdullah

iTrader: (2)

when there will be a chevrolet dual over head cam engine with 5 valves heads per cylinder and a nice shaped chambers (close to a Ferrari 458 dual over head cam engine or maybe better) for the C7. it is if designed well, will be more powerful than a pushrod engine.

djfury05

iTrader: (30)

The increased cylinder pressure and weak sleeves of the LS7 is what causes failures. If I were you I would just use the OEM LS7 heads since you'll already have them and send them to Richard at WCCH for his stage 2 treatment. I'd guess 13-15lbs would get you to 830rwhp easy.

Abdullah

iTrader: (2)

yeah I understand, thank you.

btw, how do you compare AI porting to WCCH porting?

stevieturbo

The power will lie with turbo choice, not cylinder heads.

Likewise porting the LS2 intake etc....really dont see any real value for money in there unless it's being done locally, or shipped over with a bunch of other items.

And postage to/from the US for headwork etc....often isnt really cost effective when you arent in the US. Postage rates are just silly for heavy items.

Spending big money on fancy intakes will not yield value for money as far as power gains are concerned

Get good heads, not outrageous, get a good camshaft, again doesnt need to be outrageous, and choose the turbo's to meet your needs.
All the rest will fall into place.

Usually it's handier just to buy outright from the US

LosLS2

Here's the easiest way to get to your goal.

Get your C6 Z06, order a DKT TT PT62mm kit, change the map sensor, upgrade springs and pushrods, tune and drive. Safe to about 800 rwhp on a good tune. If you want more, forge the bottom end. Bone Stock drivability.

We put a 350 shot of nitrous to my buddy Steve's LS7 bottom end (forged) for a total of roughly 1000 rwhp for over a year. 900-1000 worth of boost is no problem.

LosLS2

GM is sticking with pushrods for a while. They just recently spent a tremendous amount of money and R&D to develop the new Direct injected LT1.

stevieturbo

And if they did move to something fancy like a multivalve platform...they would probably get very expensive to tune

At least everything for the old pushrod lump is really dirt cheap !

They're a go fast bargain

LosLS2

Yeah, and keep in mind that the main reason that we aren't seeing big things out of this new platform is that there is no injector and high pressure DI aftermarket yet. Once that catches up, thing should start getting interesting.

Abdullah

iTrader: (2)

will the car accelerate the same with WCCH stage 2 ported LS7 heads, ported LS7 intake manifold and stock LS7 camshaft and AI TFS TFS LS2 230cc heads, LS2 ported intake and a stock idle cam and using for both combinations street/strip TTi twin turbo 66mm kit?

LosLS2

Forget about all the LS2 stuff. That is not logical. It's like buying a diamond ring and then taking out the diamond and replacing it with cubic zirconia. You just don't do it.