TheWolfMatt

Can it be done and has anyone done it yet?

TexasGMC08

Why a 5.5????? You can do a 5.7, 383, 395=6.4l ...

TheWolfMatt

Just wanted to see if it can be done as the ZR1 in the ALMS C6R has it set up as a 5.5L engine. I know it's a new engine but wanted to see if the good ol gen III is able to do the same.

redtan

iTrader: (5)

Bore your iron 5.3 to a 3.84" bore x 3.622" stroke = 5.5L

Will require custom pistons which are expensive, but it's doable.

Marc 85Z28

iTrader: (8)

You'll never build a that 5.5L from a 5.3L block. The 5.5L uses a 4.090" bore.

redtan

iTrader: (5)

New sleeves can do that bore.

Marc 85Z28

iTrader: (8)

Don't confuse the guy more than he already is.

Burken01

iTrader: (88)

Lol true... I'm confused reading this thread.

SSCamaro99_3

iTrader: (1)

To make it easy. Yes, you could make your 5.3 displace 5.5. However, without out a major overhaul of you block you will not be able to achieve the same bore/stroke dimensions that the 5.5 ALMS uses. It is a purpose built racing engine.

As stated above it is 4.090x3.185ish, which is not consistent with any GM soirced OEM part.

TexasGMC08

SO THE 5.5 IS KINDA LIKE A 6.2 DESTROKED WITH A 4.8 CRANK IN IT... LIKE THE OLD 327's WERE BIG BORE, SHORT STROKE....

TheWolfMatt

Who's confused?? It's an honest question. However, we all know the Iron 5.3 (to which I was reffering to LM7) doesn't require sleeves.

ryridesmotox

Isn't the 5.5 alms car powered by a version of the new LT1 engine? That's the whole reason for the development if the powerplant in the C7 I thought. Or perhaps I am mistaken.

TheWolfMatt

You are correct, I just wanted to know if it was possible from the 5.3 to get the 5.5L displacement. Wasn't too worried about how it could be done, but if it could be done.

ryridesmotox

Ohhh gotcha... Um well as my old man says... With the right application of knowledge, skill, and a boatload of money you can do whatever you want... But in this case you would have to start with something aluminum to get the true 5.5L motor. Something the 5.3 iron block is rather lacking in. Oh and I was wrong... The 5.5 has more in common with an LS7 than the new LT1... The LT1 has direct injection. So the cylinder heads are light years different. Well not light years, they are going to be made of aluminum but that's about all they will share. DI motors are the cat's *** by the way.

TheWolfMatt

Agreed, the weight alone would be a huge down turn but it would be cool to tell your friends that you're running a 5.5L engine in your car/truck.

ryridesmotox

I think it would be more fun to say I run a 572 V8 in my car/truck. Watch guys in Hondas wet their pants when they realize you almost displace more volume in one cylinder then they do in their whole car... Oh you have a turbo 4 banger? How many? cuz you're gonna need more than one. Lol

TheWolfMatt

No argument about that.