Upgrade 454
11-07-2008, 04:35 PM
#31
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What would the 496 manifolds and risers provide???? I've heard that they will improve mid-range torque through better exhaust flow efficiency??? You would also drop a bunch of weight if you had the aluminum 496 manifolds. I'm curious since I have stock 454 mags in my Scarab and would like to try and squeeze 40 to 50 hosepower potentially out of each engine.
The 496 Manifolds are actually pretty nice, seperate runners into a big 4" riser
11-10-2008, 09:17 PM
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If I take it easy, the alpha's might last. If not, it is easier to get the insurance to replace outdrives than engines. I think I will just change the exhaust tips from 3" to 4" this offseason.
Bill
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11-10-2008, 09:25 PM
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Not when the insurance finds out they have more HP going through them then they are supposed to, I know how Tom has smoked Bravos on his Rogue, I will say the Alpha has no chance on that boat with bigger HP.
11-11-2008, 09:32 PM
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Bill
11-12-2008, 05:24 AM
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Not sure, but I have heard sometimes they will investigate, either way.. there is now way those alphas are going to hold up on a heavy 28 foot boat with decent power, again.. that is my opinion..
11-18-2008, 06:10 PM
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Good to hear as I already have the 496 aluminum manifolds and risers. Just need to polish the risers and complete the install. What did you use for your shift cables mounting? I aso have remote mounted oil filters off of the stock manifolds too.
