SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: hbkeith on July 30, 2018, 09:40:43 AM

Title: BBC intake port shape
Post by: hbkeith on July 30, 2018, 09:40:43 AM

Does anyone know what shape the intake ports are on my 97 BBC Marine Power Sport Pac??

Title: Re: BBC intake port shape
Post by: sevans01 on July 30, 2018, 11:42:14 AM

Quote from: hbkeith on July 30, 2018, 09:40:43 AM

Does anyone know what shape the intake ports are on my 97 BBC Marine Power Sport Pac??

Pics, and gonna need a lot more info., my swag most likely oval.



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Title: Re: BBC intake port shape
Post by: mash on it on July 31, 2018, 10:51:11 PM

My `96 had the dreaded peanut ports.

Indmar Marine 400 hp motor.

Dan'l

Title: Re: BBC intake port shape
Post by: Josh Rickards on August 03, 2018, 11:44:45 AM

I would need a casting number to tell you with 100% accuracy. If you remove the valve cover you will see a number i.e.; 10141279. My bet (99%) you have what is known as an "oval" port head. This is a great "torque" cylinder head.

If you are using an aluminum intake make sure you use "soft" intake gaskets. Fel-Pro sells two different kinds black ones (aluminum intakes) and blue ones (cast iron intakes). A lot of people use the blue ones with an aluminum intake and they will start to leak creating a vacuum leak in the lifter valley.

Title: Re: BBC intake port shape
Post by: hbkeith on August 06, 2018, 07:45:45 AM

Thank you for the input! Josh I will get the casting number and let you know. I'm not running an aluminum intake yet but probably will be by next summer I will be sure to get soft manifold gaskets.

Thanks again :thumbup: