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Re: 540 Engine build-up.

I would go with a good 4150 series Holley. The 4500 stuff is to big. You'll never need that much air with a 540 in front of an I/O drive.

Chris

Re: 540 Engine build-up.

Quote:

Originally Posted by ursus

The oval port will make mega low end torque and less top end, you don't need the low end torque on a light boat , its just gonna hammer the drive, I would go with the rec port for a better top end, its a better match to a smaller lighter boat. Dart / Merlin make the intake with brass insert its a good choice as someone already mentioned for salt water

I like this theory. I agree running the rectangular port manifold would most likely be my best choice.

Thanks for all the replies..