whats the biggest tb you can use for the marine intake?

 

Stock is 75 mm, you can borethat sucker to whatever you want. On ebay i think I saw a 78 mm and 85 mm converted from LS1 T-bodies??
peace
HOG

 

what is the part number for that marine intake
cant find it anywhere

 

What is the marine intake being used on? Vehicle or boat?
Only reason I ask is because I've seen people use Mercruiser blocks and electronics in some mild race cars. They even had the Mercruiser engine cover on it.

Jim

 

You won't get any gains porting the throttle body or installing a larger on the Marine L31 Intake. It will do just fine with the 78mm throttle body. The manifold itself flows much better than the stock one at high RPM and the large internal volume makes air flow through the throttle body efficient. I do recommend removing the EGR diffuser plate from the throttle body blade since there's no EGR blowing against the bottom of it.

 

cool I'll just use the stock vortec throttle body and remove the diffuser. thanks for the help guys.