Gordon0652

iTrader: (4)

If i run a tall deck LSX block in my 2000 T/a, what kinds of fitment issues will i be looking at? and will LS7 headers work even theo the block is about .25" taller, and .25" wider?
Thank you!

Juiced

iTrader: (2)

you are going to need custom headers and a custom intake (or spacers and a stock intake)

rookie89

iTrader: (1)

I know this isnt your question, but for Vette owners that may be interested, I've been told that the alternator may need to be trimmed a little bit to clear the now taller valve covers

Beast96Z

iTrader: (21)

I doubt regular headers are gunna fit the bill. Why would you run a LS7 header in a 00' TA anyway? That's a Vette header. You can get 454 ci easier than going tall deck. See sig.

Gordon0652

iTrader: (4)

Sorry, "LS7 headers" i ment by LS7 style headers, and if i put 454ci in the short deck i will need 1" pistons(skirt), and thats pushing it w/ the skirt on it, and the piston to rod ratio would be off also.

Beast96Z

iTrader: (21)

There are no LS7 "style" headers. All the headers bolt up to LS7 heads. They have the same bolt pattern as other LSX heads. Seeings as how most LSX headers are very close to the fenderwell, and tuck up tight on the bottom of the car, I'd say they would hit in both places. As for the cubes, I'm not sure what borexstroke your considering, but mine is a 4.155"x4.185". The sleeves in my block are longer than stock to support the added stroke. As long as the builder and the piston manufacturer know what's going on, it isn't a problem. You could run a 4.200" x 4.100" in a LSX short deck for 454 cubes as well. It has a good ratio, although it isn't that important is you have a good builder. Are you planning on all out No2/forced induction or N/A?

Hard Core Z28

Ya really think its worth the extra cubes to do custom headers and intake. Thats gonna cost alot.

Gordon0652

iTrader: (4)

100% all motor, but i might spray a 150 wet shot when i go to the track, but probley not. Also if you have a 4.200" x 4.100" thats 444ci, to have a 454ci you would need 4.250" x 4.250". But i still am considering the Short deck with 438ci... if all else fails.

Juiced

iTrader: (2)

why don't you just put a real bigblock in the car, for the cost of all the custom pieces you can get a 1000hp bbc, take a look at the scott shafiroff motors, 1000+ hp for 12k add in 3000 for injection and you are done....

You are looking at way more than 15k for a lsx style big block.

Beast96Z

iTrader: (21)

Not sure what kind of calculator your using, but 4.200 x 4.100 is 454 cubes. 4.250 x 4.250 is 482 cubes. You should recheck your calc's. You can easily get the cubes you want with a short deck LSX. One of the main intentions of the tall deck is to start pushing the 500 cube envolope. With the LS2 block now being avalible with a dry sleeve 4.190" max bore, I'd go with a 4.185" x 4.125" LS2 (454) if you have to worry about bore/stroke ratio.

Gordon0652

iTrader: (4)

Well thats really odd, i put in 4.250" x 4.250" twice, and it came up w/ 482ci, and then 454ci.

Beast96Z

iTrader: (21)

Engine Cubic Inches = Bore (in.) X Bore (in.) X Stroke (in.) X number of Cylinders X .7854
Try a calculator, they don't lie.

Gordon0652

iTrader: (4)

So if i were to get a 482ci built all motor, with a sheet metal intake, 105mm tb, and warhawk LS7 heads, what kind of crank power might i be looking at, and same thing for the 454? Or is there more info needed?

Beast96Z

iTrader: (21)

Your looking at over 600+++rwhp almost any way you look at it. Personally, if your gunna go sheet metal, I'd say go with the cathedral style heads from ETP. 265's or the street canted valves would be a stellar head. A ported set of LS7's may also be good, but I'm still not a big fan of them. Also, throwing a 4.250" bore on the block right off the bat leaves you no room for a rebuild. Once something happens, that's it, new block time. The key to the whole thing is making sure you can feed it. You'll need to spend some coin on heads/intake. I don't think box stock LS7 stuff is gunna cut it. warhawk or not.

Gordon0652

iTrader: (4)

i looked here http://www.etheads.com/mainpage.htm and i could not find the heads...

Beast96Z

iTrader: (21)

At the top of that page there is a "tach" and it says "products and performance" underneath. Click on it. The whole first box is LSX heads. Click the one you want to look at and it will give you the info.

Stang's Bane

iTrader: (22)

Kooks actually makes a LS7 specific flange. They are d-shaped like the exhaust ports

Gordon0652

iTrader: (4)

Beast96Z, what kind of power are u runing on your 454ci?

Beast96Z

iTrader: (21)

Will know soon. I'm shooting for 650+ at the wheels.

Quickin

Build the first one, it'll have more cubes for free....j/k

You have no need for a tall deck. I'm on a list with a builder waiting for a tall deck LSX iron (9.7), but thats not for an N/A build

The best way to 454ci short deck, especially for a 100% N/A engine, is 4.185 bore by 4.125 stroke. Piston support at BDC is PLENTY.
If you want to spray it use a 4.155 bore, 447ci. The 8 cubes difference is meaningless in power.

Beast96Z,
When will that BITCH be running???????????????? Dying to see what the Harrop is gonna do.


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