pro's and con's
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Elder User
Joined: Nov 2003
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From: Kalispell, MT
pro's and con's
i'm looking for the pro's, con's and specific information on how the following things will affect a 300-6 in the torque and horsepower aspects...
bored .020-.030 over clean-up
mild port and polish on head
larger valve installation
holley 390 4bbl carb w/ offy intake to match
240-270 degree duration cam (this large degree range because i haven't yet decided how much extra duration i want to add to the stock 190-ish cam duration)
msd duraspark II ignition system
EFI manifolds with 2 1/4" - 2 1/2" exhaust with an uncertain muffler style....true dual all the way back...(any other suggestions would be considered)
bored .020-.030 over clean-up
mild port and polish on head
larger valve installation
holley 390 4bbl carb w/ offy intake to match
240-270 degree duration cam (this large degree range because i haven't yet decided how much extra duration i want to add to the stock 190-ish cam duration)
msd duraspark II ignition system
EFI manifolds with 2 1/4" - 2 1/2" exhaust with an uncertain muffler style....true dual all the way back...(any other suggestions would be considered)
Posting Guru
Joined: Dec 2003
Posts: 2,155
Likes: 3
From: Centerville, Iowa
Don't think there's much else you can do, except maybe go get headers instead of he EFI manifolds. EFI manifolds are good for a stock or nearly-stock carbed 300, but with the mods you are planning on that baby - you will be one of those persons that will actually see a benefit from headers on a 300.
You gonna get a cam that lives from 1800-3800? Or you tryin to move up the powerband a bit?
You gonna get a cam that lives from 1800-3800? Or you tryin to move up the powerband a bit?
Thread Starter
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Elder User
Joined: Nov 2003
Posts: 752
Likes: 0
From: Kalispell, MT
i don't know a lot about how different cam durations affect different aspects of engine performance, but i do want to keep a fairly substantial portion of my bottom end torque, but at the same time, i want to gain some top-end and take-off performance...
MontanaFord
MontanaFord
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