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-   -   71C velvet drive transmissions. (https://www.offshoreonly.com/forums/general-boating-discussion/383540-71c-velvet-drive-transmissions.html)

gorgs 08-29-2024 08:10 AM

71C velvet drive transmissions.
 
anyone know the HP and torque rating for the Velvet drive 71C transmissions? Just curious if it will work for our application.

thanks

Wally 08-29-2024 08:22 AM

1 Attachment(s)
For a gas engine it looks to be about 360hp
Attachment 577839

gorgs 08-29-2024 08:32 AM

thank you.

Rookie 08-29-2024 08:46 AM

I've had 590HP/525TQ in front of my 71c's (red tags) for years. My transmission builder said I was good with the components he put in it.

Tartilla 09-02-2024 11:55 PM


Originally Posted by Rookie (Post 4907343)
I've had 590HP/525TQ in front of my 71c's (red tags) for years. My transmission builder said I was good with the components he put in it.

Likely running at higher rpm?

Rookie 09-03-2024 08:05 AM


Originally Posted by Tartilla (Post 4907708)
Likely running at higher rpm?

6500 first cam setup with a wide TQ to HP graph
5800 second cam setup with close TQ to HP graph
Transmission builder said he's put 700 consistently to them, but would only warranty 600HP I believe.
It's been 18 years and now they are behind 450HP. The least amount of power.


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