OK guys, I’d like your input before I pull out the Credit Cards and spend a big chunk-a-change for a Texas Speed LS7 441 ci. Long block.


I currently have an A6 LS2 with all the following:


Comp Cam ---231/235 113.0
LG Z06 headers/hi-flow cats/LG 3" Xpipe
Z06 3" exhaust (with Npp in a box)Muffler Mod
Ported Fast 92mm intake & TB/Vararam/Pushrods/Dual Valve Springs/Underdrive pulley/Yank 3600
E.T.P. 225 Heads 11.7:1 CR
Toyo 888s 265 Front/M.T. 18" DR Rear
TractionMonster Mod

My only dyno session was last year, before I had the stall put on. It read 476rwhp/425 rwtq through my A6. This is uncorrected. I didn’t post the corrected #s because the humidity reading was somewhere like 7%……now it was dry, probably around 50% humidity, but the incorrect 7% humidity calculation really messed up the equation. Anyways……


I have someone willing to buy my cam, heads, and Fast intake. So I can recoup some money there. And I might get $2.5k for my LS2 block under 10K miles……but the 441LS7 + install is going to be EXPENSIVE

My question is….. Is there another head/cam/intake combo I can put on my LS2 that would gain me significantly more power to the wheels (mainly torque) than my current setup, or should I just get the 441LS7 and be done with it?

Would the 441LS7 be overkill for my A6? It will be mostly for the street. I have the TracctionMonster mod, and I have almost perfected a launch, just on the edge of spinning in 1st gear. All other gears hook with no problem. Will the 441ci overpower the TractionMonster mod?

Would LS7 heads work on the ls2 block? I know LS7 heads are supposed to flow much better than the 225 etp heads I have now, but will they work on the ls2 block?

Any suggestions? I’d like to stay N/A.

Thanks.

 

Anyone ?

 

I am far from an expert but run an stroker 403ci LS2. My cam is a bit bigger but i really got it for the torque.

500rwhp and 485 rwtq. Cam is a 234/238, 114+2. I have a ported FAST102 with NW102mm TB and the Halltech CF112 intake as well.

My headers are only 1 3/4 so i might gain something marginal if i went to 1 7/8, but i had the headers before i did the big mods.

The Cubes will give you more torque no question about that, especially if you have a cam specced for more torque, won't peak as high but thats up to you.

The bigger question is what are you really going to do with that much more power and tq. Are you looking for drag times or lap times to be smaller, or just to have a bit more fun on the street.

nearly 500rwhp is plenty for the street.

Some may tell you that a pair of AFR or Trickflow cast heads may be a more efficient option as well, mine are only the 243 heads ported by TEA so i am sure i have room to grow there as well.

The other question would be how much money you have to throw around, you note it as being expensive so i would assume you are at least somewhat practical to only spend the money if its worth your while.

Explain your intentions and you may get more precise advice.

 

This will be for 90% street fun, and maybe 10% 1/4 track fun.

Thanks for the response!

 

Sounds like you would already whup up on a lot of cars on the street as you are now. What are the chances of you selling that car, buying a used ZO6, then modding that one as opposed to parting out this one and rebuilding?

 

Well.....I love the A6, plus the wife can't drive stick. She had surgery on her left ankle. Plus by the time I traded in my C6, or sold it and bought a Z06, plus the sales tax.......That'd be about a $10k difference, and I'd be slower in a stock Z06 than I am in my modified C6.


Any other LS2 heads/cam.intake combo ideas?

Thanks.

 

My advice: Save a TON of money and do the motor R&R yourself.
Then everytime in the future when you have a mechanical issue, upgrade/mod install etc you can purchase the part(s) and save $$$.
With the exception for tuning and machining.

 

Factory LS7 heads fit the LS2 block but the valve spacing doesn't, the bore is too small.

Mast makes a small bore LS7 head $$$ Go to their website and price them out


How much advance is built into the cam, IE Intake lobe center? Maybe get in touch w/PatG, EPS or ETP and have them spec a cam to match the heads and your goals


You already have great heads......... maybe call ETP and ask them for a recommendation. It's not always about flow.

Myself, I would look at changing the cam out. With the 11* valve angle you should be able to get away with more lift than a standard 14* or 15* head would. When you spec a cam, have the flow data for the heads available. They are on ETPs website.

 

Everything I've seen shows that the LS2 and LS3 heads have a pretty substantial flow to them already, so I agree...upgrading here probably wouldn't net you what you are after.

 

If you're looking for more torque why don't you go with a TVS 2300 Magnacharger? You'll get a ton more torque, I guarantee it.

 

Assuming the A6 is good enough for the power, I would second the TVS suggestion. About the same amount of $$, but you'll retain some mpg's and have the FI feel.

Having done the high HP C6 coupe thing, the tires do matter. You can drive it fine, don't get me wrong, but the Z's and the old ugly tubbed out mustangs are still going to spank you light to light if you don't know what your doing (and possibly if you do).

Seat of the pants fun is what you're buying (and the rolling start... you'll still kick @$$ at that!!!!)

 

Thanks for the TVS2300 suggestion, but I want to stay N/A. My current setup is near 11.7:1 Compression ration. Too bad I couldn't slap the TVS2300 on top of my current setup! I'm sure I would need new heads/cam/hood/meth/etc.....that also adds up!

 

Or you could just swap the heads back... You'll get more reliability from the TVS option, and a better "seat of the pants" feel.

I have to be honest... N/A is cool but, but you'll get the best results with cams that don't like AT's. If you're set on N/A, you might want to consider a built A4 to be able to handle the better cams. But if you have a guy that says the 441 will play well with your A6, and your heart's set on that then have it! The important part is that you enjoy the driving experience, and it doesn't break on you.

 

With that compression ratio you would probably want to swap back to lower compression heads with the TVS 2300. Other than that, all of the other mods would play well with the Maggie.

I installed an MP112 on my Avalanche in 2004 and have enjoyed 50k miles of uneventful supercharged fun so far. FI is much different than NA; there's nothing like the instantaneous power with a Maggie when you step on the gas. The Avalanche is actually more fun to drive than my 07 Coupe because of this.