Question about engine size.

[FIDOSOL]

Is the XB9 engine the same as the XB12? Obviously there is a displacement difference, isn't it the same block though? I mean in the way that the chevrolet 350SB and the 400SB are the same block so you can actually bore both of them out to the same size as opposed to one larger than the other...

[TMC]

Kinda like chevy has a 454 small block and a 454 big block?

[FIDOSOL]

There is no 454SB...454 has always been a BB... but maybe one hell of a stroker could make 454CI but it wouldn't be very reliable...

Just wanna know about the XB9/XB12 so I know what to save up for...

[TMC]

what are you trying to do?

and here's your 454 small block
http://www.hotrod.com/techarticles/e...ine/index.html

[FIDOSOL]

The reason I was wondering about the block difference if any in the XB9/XB12 is because I want to make it a 90" monster.

That's dirty, doesn't fall into the stock in a vehicle category, but then again I didn't specify that...

Congratulations you just made my wife's hit list...

I have a 78 Chevy Cheyenne 4X4 that I wanted a new engine for...



NO REPLACEMENT FOR DISPLACEMENT!!!!!



OH BTW, hookin' you up with a for that astounding revelation of SB information.

[buell007]

the bore is the same its the stroke that s the diffrence

[06xb9r]

You'll have to stroke it. With available parts, the largest bore on a 9 takes it to 1200cc...on the 12 it's 88" I think.
You'll have to put a 12 rotating assembly in it

The 350&400 sbc blocks are not actually the same casting, just the same size on the outside. You can't bore a 350 out to 400ci. The 400 has a much larger stroke and a larger bore to start with. I don't think you could even take the 350 block out to the stock 400 bore, you would have to take 1/8" out of the cylinder

I think(not completely sure) the Buell cases are the same, 9&12, the entire cylinder is just swapped with a big bore kit

[FIDOSOL]

If the cases are the same then the big bore (1474cc) kit for the 12 would work on the 9 as well right? What mods would I need to make it work?

[TMC]

I'm building a 90", there is a great deal involved with doing a 90" motor I've built a couple of 88" motors in my past

[LeFox]

1200cc Kits With Axtell Nicom Plated Aluminum Cylinders. Black Finish Look.


These kits take your XB9 out to the maximum bore size you can safely get in your stock cases. The result will astound and amaze you, as the lightweight XB9 really responds to the additional displacement. Of course, this engine kit comes with the finest quality components money can buy: Axtell iron lined or nicom plated all-aluminum cylinders, matching forged Hurricane pistons with tool steel wrist pins, Total Seal rings, and Cometic EST gaskets! Note: case boring is required for installation.

All-Aluminum construction offers the lightest weight and best heat dissipation. Other powder coat colors available, please call for details.

1200cc Big Bore Kit
3-13/16 bore Axtell Nicom plated aluminum cylinders
10.5:1 pistons, pins, clips, rings
head and base gaskets

case boring required:
Accurate and precise case boring is critical to the success of your big bore project! Twin Motorcycles has extensive experience in this specialized procedure and will bore your cases on a state-of-the-art CNC machine for unsurpassed precision and quality.