stock 454 upgrades
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stock 454 upgrades

  1. #1
    Senior Member nos1967's Avatar
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    Default stock 454 upgrades

    I have a stock MP 454 with basset headers. aluminum heads and cam are planned for the future but for now im on a budget. would a victor jr intake, 850 dp carb and 1.7 full roller rockers be worth the money with stock heads/cam? I have the itch to build haha

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    New here Beer:30's Avatar
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    Quote Originally Posted by nos1967 View Post
    I have a stock MP 454 with basset headers. aluminum heads and cam are planned for the future but for now im on a budget. would a victor jr intake, 850 dp carb and 1.7 full roller rockers be worth the money with stock heads/cam? I have the itch to build haha
    A Victor intake would do just that - haha - laugh at the stock intake ports.

    On a budget, I would seriously look at the Edelbrock package that has cam, heads, intake for around 540hp:

    For 396-454 B/B Chevy (1995 & earlier) - 540 hp & 539 ft/lbs.
    Performance results obtained on a 460 c.i.d. shortblock w/9.6:1 compression. #2095 POWER PACKAGE TOP-END KIT #2095 INCLUDES: Part No. Description 7162 Performer RPM Cam (flat tappet cam) 60459 (2) Performer RPM Oval Port Cylinder Heads 7363 Timing Cover Gasket and Seal Set 7363 Cylinder Head Gasket Set 7561 RPM Airgap BBC Oval Port 8564 Intake Manifold Bolt Kit 8551 Cylinder Head Bolt Set
    That whole package is around $2700
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    There are thinks you can do to awake your stocker but more info on your motor is needed. What is your current carb? What heads do you have now? What intake manifold does it have? Ign system?

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    Senior Member djmadmatt's Avatar
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    I.M.H.O ... Victor Junior's arnt a good intake for boats. Jet or Stern etc.

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    hey NOS...
    get ahold of Smokinlowrider here on the boards (jets)...he has a very mild stock 454 that runs pretty damn good ...he has helped me & i'm sure he can help u without spending alot of $$$

    FastRat

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    Sit N' Spin Jetaholic's Avatar
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    Smokin' Pole(rider)......does have a great ridin' setup. RonJane taught him everything he knows...

    However, if you're in Cali, squirt (aka Mr Banderlog) also is running a stock 454 and definitely knows his shit as well and is a lot closer to ya. Like Smokin' Lowrder he's runnin' a stock setup and is doing everything they tell you NOT to do...and is still on the water!!! If that's not enough I don't know what is.



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    Senior Member CK7684's Avatar
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    I'd go with an Edelbrock Performer RPM air gap intake. You could always add a 2" open spacer down the road. Wait to do the roller rockers till you do the heads etc.

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    Senior Member nos1967's Avatar
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    its a stock marine power 390hp 454....not sure on the carb but its a fairly low profile intake. forged crank, con rods, pistons, 8.8 to 1 compression.

    instead of the edelbrock kit ive picked out a few things that end up cheaper. procomp aluminum heads fully assembled 320cc runners, 2.30/1.88 valves, 115cc combustion chamber, up to .675 lift. comp cams xtreme marine cam(havnt decided which grind yet, something with a 2500-6500 powerband) 950 demon carb, and ill go by popular vote for the intake.

    i also need to figure out the combustion chamber size of my current heads, ide like to get above 9 to 1 compression without changing the pistons.

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    Senior Member CK7684's Avatar
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    I'm running the Edelbrock Performer RPM Oval (rectoval in edelspeak) heads and I like them a lot. My roller cam has over .600 lift and my engine is very responsive. The Edelbrock heads are pretty nice pieces. IMHO you seem to be going big for not tearing down the bottom end...

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    When you guys say they are running stock 454's does that mean they have "cast" pistons in them ?

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    Quote Originally Posted by 468Bahner View Post
    When you guys say they are running stock 454's does that mean they have "cast" pistons in them ?
    this could be a fact, not sure...he said he had forged pistons...stock to me refers to bore & stroke being as it was when bought (crate eng)...marine engs may come with forged rather than cast!

    FastRat

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    Quote Originally Posted by nos1967 View Post
    i also need to figure out the combustion chamber size of my current heads, ide like to get above 9 to 1 compression without changing the pistons.
    take the 8 digit # from the top of the heads where the springs sit & post it here & some1 will tell u "exactly" what u have!

    FastRat

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    Purple headed member Quickjet's Avatar
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    Default Here is what I did.

    My first boat was a 79 19'ft heavy ass Bahner that was 100% stock. Low compression, Erson "Jet boat" cam that was super small, stock junk heads, a Holly single plane intake and a 100% stock pump with a Place diverter. The boat would see 70 mph on a regular basis.
    I had put thread up much like you did about upgrades and everyone said "Buy a good set of Oval ports, add a .550 lift cam and run the Edelbrock RPM Air gap intake with a 750-850 carb."
    Now being that I wanted to actually beat people on the water with little effort, I thought, "why would I want to run what everyone else does?"
    So I took all that so called advise and disscarded it. I bought a set of 990 square ports, a .636 solid flat tappet Isky Cam (Z89) and topped it off with an Edelbrock Tunnel Ram with two 660 carbs. Next trip out I ran 82.7 mph with a 100% stock boat, pump and 87 octane fuel. I did this by NOT listening to the conservative advise I got from others. I know 82.7 is not that fast however I have seen people go wayyy slower with more pump work and supposedly better combos. Later this same engine went 94 mph in a stock V-drive.
    When I sold the Bahner to a friend of mine he installed a "Conservative combo" replicating the one's you have been advised to go with.
    After much work, his oval port headed single carbed combo went a wopping 74 MPH!!! That's 4 MPH over stock and 9 mph SLOWER than the so called "Wrong" combo I had. After much persuasion from me he later installed the bigger heads, cam and intake and brought the boat back to life with 83-85 MPH passes.
    I know that I am not a master at this and there are some people here who are way more knowledgeable than I am, however, from real life experiences I can tell you that a conservative combo will net you a conservative gain for about the same price.
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    Senior Member CK7684's Avatar
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    Hmmm, well, all I can say is that I have pretty good luck with my combo. It isnt any .550 lift cam though. Closer to yr .631

    Also, I havent heard anything good about procomp heads.

    ...my stock engine was basically an LS7 crate motor from Indmar...

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