Stock LSX376-B15, anyway to increase compression ratio

[ADM PERFORMANCE]

Originally Posted by Unavowed

Your worked LS3's and a GT-9, long tubes, pump 93, A6.

600-620

[ayousef]

10.3:1 CR + 12psi and a GT9 cam on 93 octane will be right at the edge if not beyond.

I don't know why Andy said 600-620 maybe he missed the 417ci part? Should be 700+ rwhp.

Look at those LSA motors doing 700+rwhp with only 6.2L and about 14psi of boost from the baby yet efficient 1900 on pump gas.

[Nvincent4708]

Originally Posted by ADM PERFORMANCE

Don't change the compression. We have used this engine already
And is not a slug.

I love how these Internet engineers always seem to try
To steer people away from gm crate engines... Ask real supporting vendors
These questions and you will get real answers due to real
World experiences used everyday.

I say go Lsx and never look back...

This!

I had one in the SS I just traded in.. actually it's still for sale haha.

I did however change the Cam, it made it better off the line. It was a monster.


http://www.cars.com/go/search/detail...t&BAC=BYSfbDR1

They failed to mention it has an LSX376.. Cammed, full exhaust and all.. It passes inspection too.

[Unavowed]

Originally Posted by ayousef

10.3:1 CR + 12psi and a GT9 cam on 93 octane will be right at the edge if not beyond.

I don't know why Andy said 600-620 maybe he missed the 417ci part? Should be 700+ rwhp.

Look at those LSA motors doing 700+rwhp with only 6.2L and about 14psi of boost from the baby yet efficient 1900 on pump gas.

My thoughts exactly. If a V, with stock cubes, a 1900, and a LS9 cam makes @ 650 rw, then a 417 with a 2300 and a GT9 should be 700+, assuming you have a fuel system to support it. At least I hope.

[old motorhead]

Don't forget we're talking A6 here. GT9 cam is going to choke that big motor a little. More cam would sure help.

[Andy@Livernois]

Originally Posted by Unavowed

My thoughts exactly. If a V, with stock cubes, a 1900, and a LS9 cam makes @ 650 rw, then a 417 with a 2300 and a GT9 should be 700+, assuming you have a fuel system to support it. At least I hope.

Remember though, engine size means nothing to a supercharger. Boost is only a measure of restriction, not total airflow. A 2300 supercharger can only move x amount of airflow, which will make x amount of HP, no matter how large of an engine is underneath of it. Factor in the auto, and you are talking about a combination that would make ~650, but 700 is a stretch as the blower just cannot move enough air to be efficient at that level.

[Unreal]

Which is why I love turbos. 12psi, stock l99, no heads, no cam, no headers, no cais, no tensioners. 680rwhp/740rwtq.

Andy@Livernois, who is the person to talk to about being a dealer? Dave?

[Unavowed]

Originally Posted by old motorhead

Don't forget we're talking A6 here. GT9 cam is going to choke that big motor a little. More cam would sure help.

There are numerous A6 CTS-Vs with LS9 cams putting down @ 650 rwhp. I figure a LS9 cam on 376ci is like a GT9 on a 417.

Originally Posted by Andy@Livernois

Remember though, engine size means nothing to a supercharger. Boost is only a measure of restriction, not total airflow. A 2300 supercharger can only move x amount of airflow, which will make x amount of HP, no matter how large of an engine is underneath of it. Factor in the auto, and you are talking about a combination that would make ~650, but 700 is a stretch as the blower just cannot move enough air to be efficient at that level.

Ive read that all things being equal, every ci = @ 1.5 rwhp. Hoping for something like this build of Andy's. http://www.camaro5.com/forums/showthread.php?t=289999

[Supercharged SS]

Originally Posted by Unavowed

Ive read that all things being equal, every ci = @ 1.5 rwhp. Hoping for something like this build of Andy's. http://www.camaro5.com/forums/showthread.php?t=289999

I've always heard the same thing.

[old motorhead]

[QUOTE=Unavowed;6686959]There are numerous A6 CTS-Vs with LS9 cams putting down @ 650 rwhp. I figure a LS9 cam on 376ci is like a GT9 on a 417.

Damn...Bad assed Caddies. How much boost are they using to get those numbers? Stock short blocks?

[Unavowed]

Originally Posted by Supercharged SS

I've always heard the same thing.

Basically your build with a 4" crank.


[QUOTE=old motorhead;6687022]

Originally Posted by Unavowed

There are numerous A6 CTS-Vs with LS9 cams putting down @ 650 rwhp. I figure a LS9 cam on 376ci is like a GT9 on a 417.

Damn...Bad assed Caddies. How much boost are they using to get those numbers? Stock short blocks?

Forged rods and pistons, stock displacement.
http://www.ctsvowners.com/forum/show...d-stock-muffs-)

[Supercharged SS]

[QUOTE=Unavowed;6687203]Basically your build with a 4" crank.

Originally Posted by old motorhead

Forged rods and pistons, stock displacement.
http://www.ctsvowners.com/forum/show...d-stock-muffs-)

Hey, my crank is much much bigger than 4"!!!

[Supercharged SS]

[QUOTE=Unavowed;6687203]Basically your build with a 4" crank.

Originally Posted by old motorhead

Forged rods and pistons, stock displacement.
http://www.ctsvowners.com/forum/show...d-stock-muffs-)

I wish my car made 793 rwhp.

[jrpxxii]

[QUOTE=Supercharged SS;6687219]

Originally Posted by Unavowed

Basically your build with a 4" crank.




I wish my car made 793 rwhp.

Id like to see your car on the dyno with the nitrous shot to see what you are REALLY making