CMCV Plates

[James Hill]

I am planning for some engine mods that I would like to do over the winter months. Those will include new heads, cams, headers and exhaust. I see these CMCV delete plates, and I am not sure what they do, if you need them, or what advantages will come from installing them.

 

Does anybody know what they are for? Do I need them?

 

Any info would be appreciated.

[kahmann]

Here's another recent thread:

http://www.teamshelby.com/forums/index.php?showtopic=47339

 

Here's my install thread:

http://www.teamshelby.com/forums/index.php...c=44154&hl=

 

Basically, your intake manifold is already equipped with these plates, installed between the intake manifold and heads. However, the OEM plates have butterfly valves in each port, which are driven by an electric actuator attached to the back of the intake manifold. These valves open and close similar to how the twin blades in your throttle body open and close, as you accelerate.

 

The aftermarket plates do not include the butterfly valves, allowing maximum airflow into the heads all of the time. I noticed a 10-15 HP gain by installing the Steeda billet charge motion plates, which not only delete the valves but also have bigger ports than the OEM plates. Some have reported low end torque losses. My dyno sheet will show that my SGT didn't suffer from this at all.

Removing, replacing, or modifying these plates isn't necessary by any means. But they are good mod to free up some cheap HP.

 

Ken

[AstroDan]

Here's another recent thread:

http://www.teamshelby.com/forums/index.php?showtopic=47339

 

Here's my install thread:

http://www.teamshelby.com/forums/index.php...c=44154&hl=

 

Basically, your intake manifold is already equipped with these plates, installed between the intake manifold and heads. However, the OEM plates have butterfly valves in each port, which are driven by an electric actuator attached to the back of the intake manifold. These valves open and close similar to how the twin blades in your throttle body open and close, as you accelerate.

 

The aftermarket plates do not include the butterfly valves, allowing maximum airflow into the heads all of the time. I noticed a 10-15 HP gain by installing the Steeda billet charge motion plates, which not only delete the valves but also have bigger ports than the OEM plates. Some have reported low end torque losses. My dyno sheet will show that my SGT didn't suffer from this at all.

Removing, replacing, or modifying these plates isn't necessary by any means. But they are good mod to free up some cheap HP.

 

Ken

 

 

Ken, you are the man!

 

Great post and question. Sounds like a nice mod...

[James Hill]

Thanks Ken. After seeing your install thread, the decission will be to install these.

 

My plan would be install all the mods, then do one computer tune for all.