Mercury marine intake/supercharger Gen VI 454 7.4

[Oxburg1377]

Hey all looking for information on a marine intake swap for a 99 k3500 7.4 454. I've searched threads on it but haven't come up with anything. Is it worth it? Looking too use the marine intake and supercharger. Can't find a whipple.. anything related will help!

 

[Christian Steffen]

I'm intrigued by this. What is different about the marine intake? They aren't the same as what went in the truck?

 

[Oxburg1377]

I'm intrigued by this. What is different about the marine intake? They aren't the same as what went in the truck?

I know that the stock intake had flow limitations. I was throwing around the idea that with the marine intake it could possibly help with air flow. As well as having the marine supercharger set up readily available verses looking for a used whipple. Some variety of the marine 454 use a similar intake and other not so much. Such as shorter runners.

 

[Oxburg1377]

I have seen threads on 350 truck motors with the marine intake but not a 454.

 

[TylerZ281500]

454 is already multiport the marine ones are essentially the exact same

 

[Oxburg1377]

454 is already multiport the marine ones are essentially the exact same

I agree I was going for air flow verse injection type

 

[Christian Steffen]

If you find any good information on the differences, I'd like to see them. Do you have any info on this marine SC?

 

[TylerZ281500]

no increase in air flow

 

[Oxburg1377]

no increase in air flow

Do you have anything that says so?

 

[TylerZ281500]

from what im researching its the same intake, from what my marine guys are telling me most of the just use truck ones with minor modification. USA-1 race guy says go full aftermarket both are medially the same. why? no i dont have specifics, theres a ton of info out there just no conclusive info. grab both and flow test them but.......i will personally take their word for it if they are saying its not worth the time.

if im wrong im wrong but i ditched the OEM on a Friends truck and just used a standard square bore FI intake with an elbow and 100+ ls style TB, then it went to CPCC, running a 411 computer with an 8.1 base tune, modified with injector and firing banks swapped to accommodate the cam of the 7.4;s firing order.