SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: BDK on August 03, 2021, 10:26:39 AM
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Greetings, first post. I did search for my topic, didn't find it.
I inherited my Dad's 1987 Miller Mini-Cruiser. Its a beautiful boat full of family memories. Its been sitting over six years. I got it running after changing the oil, all the filters, the plugs and draining the gas tanks. It runs strong, but I have sent the carb to a hot rod friend to be rebuilt because I didn't want to take the chance of a clogged port burning out a piston. It has a Holley 3310-2 750 on a 1" adaptor plate.
The engine is a 1981 HM 454 that was gone through right before my Dad started declining so it has maybe 20 hours on it, and one trip to Havasu. It has a mild cam, not sure what it is and I couldn't locate any paperwork.
It has the OEM intake manifold on it. Since I pulled the carb, a hot rod buddy who was looking the engine over suggested I get a nice dual plane intake manifold to wake that engine up a little. Nothing too crazy, its a covered engine and needs to stay that way. Maybe 2" over the stock intake would be fine. It was suggested I call Edelbrook and use their recommendation but its hard to get ahold of them lately. I am looking for something that would produce a little more power but not use much more fuel. I was thinking a modern intake manifold could do that. Would want to keep the carb it has on it, and I would like to stay under $400 if possible. The boat has never been in salt water and never will if that matters.
Any suggestions would be appreciated?
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Nice looking boat, sorry to hear about your dad.
I run an Edelbrock RPM on my 454 in my Rogers and on the 383 in my Chevelle and love them for single carb setups. The one int he boat is a standard and the one in the Chevelle is an airgap, either one will work.
https://www.edelbrock.com/performer-rpm-big-block-chevy-2-o-intake-manifold-7161.html
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Welcome! Beautiful float!
Sent from my LM-Q730 using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)
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I run a Victor Jr air gap on mine. Dog house clearance might be a problem for you.
Jets don't really need extra torque down low... That's what a dual plane manifold is for.(motorhomes and tow trucks).
A compromise is a Eddie performer rpm (or similar) with a 1" open spacer (linkage wouldn't clear without it anyways). Clearance might still be a problem. I can check the height differences this weekend. Vic Jr vs performer rpm vs a stock iron truck manifold.
Dan'l