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manifold

  1. #1
    I was like blam! thehookerman's Avatar
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    Default manifold

    Im wanting to change my stock manifold .what after market manifold would work with my set up ?stock 454 ,oval closed chamber heads 98cc,holley 750.Thanks
    im into spanish cheese

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    Quote Originally Posted by thehookerman View Post
    Im wanting to change my stock manifold .what after market manifold would work with my set up ?stock 454 ,oval closed chamber heads 98cc,holley 750.Thanks
    i would recommend the Edelbrock RPM Air Gap manifold...its a dual plane...great bottom end torque & good mid range...IMO, the best manif for the $$$...there are several peeps on here who run one with good success ...just my .02 cents

    FastRat

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    Quote Originally Posted by FastRat View Post
    i would recommend the Edelbrock RPM Air Gap manifold...its a dual plane...great bottom end torque & good mid range...IMO, the best manif for the $$$...there are several peeps on here who run one with good success ...just my .02 cents

    FastRat
    That's a good choice!

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    Senior Member Notalent's Avatar
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    Weiand Stealth Intake
    "Pain is a figment of your Imagination"

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by FastRat View Post
    i would recommend the Edelbrock RPM Air Gap manifold...its a dual plane...great bottom end torque & good mid range...IMO, the best manif for the $$$...there are several peeps on here who run one with good success ...just my .02 cents

    FastRat
    I'm one of them, and my old lake tub throws nitrous down it occasionally as fast as 5,900rpm.
    Great all-around working manifold.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

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    Senior Member hotbo's Avatar
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    Quote Originally Posted by SmokinLowriderSS View Post
    I'm one of them, and my old lake tub throws nitrous down it occasionally as fast as 5,900rpm.
    Great all-around working manifold.

    thats the slowest damn lake tub ive seen to turn 5,900 and go no where,lmfao!!!!!!maybe you should make some phone calls to real boat shops,lol!!!

    just pickin on ya smokin been awhile

    anyway yes the rpm air gap is your best choice for stock mill.

  9. #7
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Gonna be interesting to see what she does with all that "F" hardware no longer dragging in the water next spring, for sure.
    I actually think the reverse "spout" was dragging too.

    Hope to see ya at the lake sometime hotbo.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

  10. #8
    I was like blam! thehookerman's Avatar
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    what else can I do to get some more ponies ?
    im into spanish cheese

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Depends on what you already have, and how much you want to spend.

    The "quick n' dirty" is Nitrous (which I am a fan of).

    I started with a bone stock 1978 454, made about 280 HP.
    Budget forced me into incremental changes over winters.
    Cam and intake change got me to about 350HP. (4800RPM, Berk A)
    Thru Transom headers put me at 400HP (5,000RPM)
    Head porting/valve work put me at about 500HP (5,400RPM)
    Nitrous puts me at 650. (5,900RPM)
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

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    Quote Originally Posted by thehookerman View Post
    what else can I do to get some more ponies ?
    the "old" saying is: "Speed costs...how fast do u want to go?"...as Smoke said, subtle changes do make a difference ie; cam, head work, valves, headers, ign, etc...i personally would get rid of those closed chamber heads & look for some 049/780's (open chamber)...much better head ...also...maybe some jet work ie; different impeller (A or A/B), ride plate & shoe...that should put u around 500HP+ @ 6k +/- at around 75-80mph, maybe more depending on the hull u have...just my .02 cents

    FastRat

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    The only bad part of the head swap is loosing compression. The open chambers are typically about 20cc's bigger, which is a whopping 20%, likely costing you 20% drop in compression. They flow much better due to less shrouding arround the valves, but you really need to replace pistons along with heads so as to not go backwards any.
    The other thing is '049 heads normally are found with the factory smaller valve size (2.07/1.72"), unless they have been changed. Rare to find them already with 2,19/1.8+'ers)
    '781 heads are really rare, but are basically the same casting, the '049 just being the later/newer replacement casting #.
    Aftermarket heads are an option to consider. I considered them against porting/enlarging valves in my heads. I believe that I got performance above what out-of-the-box heads would have gotten me, and to get the box heads better, would have cost more $$$$. "Bang-for-the-buck" is something I live with daily.
    Some decisions aren't easy, except for other people to make with your $$$$.

    Your decisions on where to go from where you are and how you want to get there.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

  14. #12
    I was like blam! thehookerman's Avatar
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    my motor is running fine now so I was thinking when it comes time to freshing it up might aswell do some modificatoins and budget is a big issue .so for know im going to change my intake and do some pump work see where that gets me . my set up is 18ft crusader v hull ,stock 454 ,tt logs with snails ,dominator ,droop ,hyd place diverter.thanks hooker.oh yeah what about putting basset headers on any gains from that.
    im into spanish cheese

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    yes, Bassett/Rewarder headers would help "alot" ...also...depending on what impeller u have now, a chng to an A or A/B would be a good thing

    FastRat

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    Or Seth, either one Budweiser's Avatar
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    I agree, a Performer RPM AirGap would work well. Or a Vic Jr, it's in a jet right?

    Quote Originally Posted by thehookerman View Post
    what else can I do to get some more ponies ?
    A complete top end kit like the one linked below takes all the thought out of the equation. Maintaining an appropriate compression ratio is important so, as stated above, new pistons may be in order too. And that's opening a can of worms. Re-balance, "Oh, while we've got Thi$ thing apart we could do thi$ too. Oh ye$ of cor$e we $hould al$o upgrade thi$"

    http://store.summitracing.com/partde...4&autoview=sku

    Or for the same $3k +, the easiest no brainer option is to just add a ProCharger. Leave everything together, bolt it on, tune, and go. And when it comes time to sell, you have the option of returning the engine to stock, keeping it for another project or raising the value by leaving it on.
    Last edited by Budweiser; 11-01-2008 at 11:28 AM.

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