Cam Suggestions for mostly stock 454
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Cam Suggestions for mostly stock 454

  1. #1
    Senior Member koyota93's Avatar
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    Default Cam Suggestions for mostly stock 454

    I am looking for a cam for my pretty stock motor. It has 049 oval heads, dual plane manifold, HEI MSD billet distributor, Holley 750 vac secondaries, Bassett OT headers, and Edelbrock Fuel Pump. I believe the bottom end is stock. The heads are going to the machine shop to get redone. They will be milled down a little and slightly ported and polished. I think the impeller is either an A/B or B and the turns 5000 rpms. I am looking for suggestions on a cam that will give it more power but will still idle.

    I have no idea what cam is in mine right now. There was an Erson sticker on the boat when I got it, so maybe Erson.

    I am looking at this one:
    http://www.compcams.com/Cam_Specs/Ca...?csid=406&sb=2

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    Senior Member GT Jets's Avatar
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    Need , mech. sec. carb (750cfm), forged pistons, and ear muffs to run that cam, I actually just pulled the XM288H from my boat (19' bubble deck w/468 and an "A" stainless) was a bit too much, pretty lumpy idle, sounded Badass though, I recently went down to a XM278H (really hurt the crank and had to start over) with an open plenum manifold and the engine is a little more tame at the bottom, but didn't loose any top end, I can run an "A" with a stuffer and a snoot right up to 5200 rpm and thats where it runs.

    I have two questions for you;

    1. Are you prepaired to blow the motor up being stock? (cast pistons are good for about 4,800 rpm) because with that camshaft and a "B" impeller, that thing is going to be singing. (I estimate about 5,600+ RPM)

    2. How will the boat be used? Ski?, Speed runs etc..I have torn up two bottom ends in two seasons trying to get the mix right, I'm almost there but would have been a lot cheaper to build the "Mean Bastard" first.

    IMO the XM288H will not like the dual plenum intake, or the vacuum secondaries.

    However that is a killer cam, But I'm a Comp Cams freak!

    Also just my opinion but get the entire kit ; cam, lifters, springs, retainers, seals, timing set, you'll be glad you did, plus you can save a little CA-CHING!

    BTW it may be thirsty for some really good gas too, depending on the CR.

  4. #3
    TEN THIRTY ONE RCB19's Avatar
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    Call George over at Clay Smith. (714) 523-0530
    RCB

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  6. #4
    Senior Member koyota93's Avatar
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    Quote Originally Posted by GT Jets View Post
    Need , mech. sec. carb (750cfm), forged pistons, and ear muffs to run that cam, I actually just pulled the XM288H from my boat (19' bubble deck w/468 and an "A" stainless) was a bit too much, pretty lumpy idle, sounded Badass though, I recently went down to a XM278H (really hurt the crank and had to start over) with an open plenum manifold and the engine is a little more tame at the bottom, but didn't loose any top end, I can run an "A" with a stuffer and a snoot right up to 5200 rpm and thats where it runs.

    I have two questions for you;

    1. Are you prepaired to blow the motor up being stock? (cast pistons are good for about 4,800 rpm) because with that camshaft and a "B" impeller, that thing is going to be singing. (I estimate about 5,600+ RPM)

    2. How will the boat be used? Ski?, Speed runs etc..I have torn up two bottom ends in two seasons trying to get the mix right, I'm almost there but would have been a lot cheaper to build the "Mean Bastard" first.

    IMO the XM288H will not like the dual plenum intake, or the vacuum secondaries.

    However that is a killer cam, But I'm a Comp Cams freak!

    Also just my opinion but get the entire kit ; cam, lifters, springs, retainers, seals, timing set, you'll be glad you did, plus you can save a little CA-CHING!

    BTW it may be thirsty for some really good gas too, depending on the CR.
    I appreciate the input on that cam. I really have no idea about what cam would be good for my motor, but that one sounds too aggressive. Its not a race boat, just a cruiser, but I do step on it every now and then.

    Wow, you really think that cam will make my boat spin 600 RPMs more? I don't have the budget to run forged pistons. So that would be out of the question.

    My buddy gave me his old 750 DP with mech sec. I was thinking about rebuilding that and running it.

    Any Comp cam you can recommend instead? I have to stick to a strict budget, so custom grind will be the last resort. Any idea about how much a custom grind cam runs?

  7. #5
    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by koyota93 View Post
    I appreciate the input on that cam. I really have no idea about what cam would be good for my motor, but that one sounds too aggressive. Its not a race boat, just a cruiser, but I do step on it every now and then.

    Wow, you really think that cam will make my boat spin 600 RPMs more? I don't have the budget to run forged pistons. So that would be out of the question.

    My buddy gave me his old 750 DP with mech sec. I was thinking about rebuilding that and running it.

    Any Comp cam you can recommend instead? I have to stick to a strict budget, so custom grind will be the last resort. Any idea about how much a custom grind cam runs?

    I run HTP's hydraulic flat tappet cam in mine. It's made by Isky and it's a custom grind derived from their 280H mega cam, but with steeper ramps on the lobes to make the valves open and close quicker. With a White Lightning loader, shouldered wear ring and a stuffer mine pulls an American Turbine AB impeller to 5400 RPMs easy, and the motor idles great at 900 RPM.

    Duane at HTP sells this cam as a kit complete with anti pump up lifters, springs, retainers and locks. We changed over from the 7* locks and used 10* instead because the springs on this cam are 150lbs on the seat and 395lbs open. Due to the high spring pressure of these springs I highly recommend high strength roller rockers and pushrods, and upgrade the rocker studs with the ARPs as well. The pushrods I used are the Comp Cams 3/8" 1 piece chromoly ones and Scorpion roller rockers. Both of these are rated for 800lbs so you'll have a bulletproof valve train when it's all said and done.

    Take a look at SmokinLowrider's setup. His is a stock rotating assembly and he also runs the 049 heads as well with the same cam I'm recommending.
    Last edited by Jetaholic; 06-28-2008 at 09:34 PM.

  8. #6
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    Full roller motor with a Blower, biggest cam possible, forged pistons, h beam rods, dual carbs, Aluminum heads with extensive porting and polishing, forged stroker crank, and a new boat to put it in. No more worries about being the slowest on the river......

  9. #7
    Senior Member koyota93's Avatar
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    Quote Originally Posted by swra311 View Post
    Full roller motor with a Blower, biggest cam possible, forged pistons, h beam rods, dual carbs, Aluminum heads with extensive porting and polishing, forged stroker crank, and a new boat to put it in. No more worries about being the slowest on the river......
    Sounds good to me. You pay for it and you can have permanent shot gun.

  10. #8
    Senior Member GT Jets's Avatar
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    If it were me, I would use this stick with a good set of lifters and springs, The "K" kits are actually pretty fairly priced too, if on a budget like me. What normally happens is guys will run them really hard and break a piston apart tearing up a little bit of everything.

    I'm thinking this XM270H will make good power and still sound pretty good.

    Good luck!

    http://www.compcams.com/Cam_Specs/Ca...?csid=404&sb=2

  11. #9
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by koyota93 View Post
    I am looking for a cam for my pretty stock motor. It has 049 oval heads, dual plane manifold, HEI MSD billet distributor, Holley 750 vac secondaries, Bassett OT headers, and Edelbrock Fuel Pump. I believe the bottom end is stock. The heads are going to the machine shop to get redone. They will be milled down a little and slightly ported and polished. I think the impeller is either an A/B or B and the turns 5000 rpms. I am looking for suggestions on a cam that will give it more power but will still idle.

    I have no idea what cam is in mine right now. There was an Erson sticker on the boat when I got it, so maybe Erson.

    I am looking at this one:
    http://www.compcams.com/Cam_Specs/Ca...?csid=406&sb=2

    According to some people, I'm running every wrong performance part I could find:
    Cast pistons
    Dual plane RPM Air Gap manifold
    Hydraulic cam (HTP's custom version of an Isky 280H (same as jetaholic))
    factory cast iron crank
    factory I-beam rods
    carb is too small
    measely 8.3:1 compression in a 454
    Iron Oval Port factory heads (ported lightly))
    Hell, even the roller rockers are STEEL, not magic-white-metal (aluminum).
    Oh yea, 2-bolt block too.

    Almost forgot, STOCK Melling oil pump and a 5-quart pan full of Synthetic, 2qt filter tho.

    I make 500HP, 650 HP feeding her Nitrous for the 29th year in a row.
    That is 5400 and 5900 RPM spinning an Aggressor B (Berk A cut).
    Last edited by SmokinLowriderSS; 06-28-2008 at 07:09 PM. Reason: Forgot something
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    Quote Originally Posted by SmokinLowriderSS View Post
    According to some people, I'm running every wrong performance part I could find:
    Cast pistons
    Dual plane RPM Air Gap manifold
    Hydraulic cam (HTP's custom version of an Isky 280H (same as jetaholic))
    factory cast iron crank
    factory I-beam rods
    carb is too small
    measely 8.3:1 compression in a 454
    Iron Oval Port factory heads (ported lightly))
    Hell, even the roller rockers are STEEL, not magic-white-metal (aluminum).
    Oh yea, 2-bolt block too.

    Almost forgot, STOCK Melling oil pump and a 5-quart pan full of Synthetic, 2qt filter tho.

    I make 500HP, 650 HP feeding her Nitrous for the 29th year in a row.
    That is 5400 and 5900 RPM spinning an Aggressor B (Berk A cut).
    blah, blah, blah, blah,

  13. #11
    ....like warm apple pie RaceFace's Avatar
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    Quote Originally Posted by RCB19 View Post
    Call George over at Clay Smith. (714) 523-0530
    Ditto. Call George. He won't steer you wrong.
    Race

  14. #12
    steelcomp was here
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    Default Get over yourself

    Quote Originally Posted by SmokinLowriderSS View Post
    According to some people, I'm running every wrong performance part I could find:
    Cast pistons
    Dual plane RPM Air Gap manifold
    Hydraulic cam (HTP's custom version of an Isky 280H (same as jetaholic))
    factory cast iron crank
    factory I-beam rods
    carb is too small
    measely 8.3:1 compression in a 454
    Iron Oval Port factory heads (ported lightly))
    Hell, even the roller rockers are STEEL, not magic-white-metal (aluminum).
    Oh yea, 2-bolt block too.

    Almost forgot, STOCK Melling oil pump and a 5-quart pan full of Synthetic, 2qt filter tho.

    I make 500HP, 650 HP feeding her Nitrous for the 29th year in a row.
    That is 5400 and 5900 RPM spinning an Aggressor B (Berk A cut).
    "You" make 500hp? LOL...That's rich. Why do all your posts sound so self-congratulating, sarcastic, jealous, and whining, like you're bragging "I'm better 'n you" when you've done absolutely nothing even worth mentioning? I mean, you've described above an engine that a 16 yr old might build as his first "performance" rebuild, and you make it sound like some magic legendary high performance miracle, and you're the Creator behind all it's glorious success. All whopping, earth shattering, -so you say- 500hp. (not) The parts were carefully researched, hand chosen, meticulously inspected and assembled with painstaking accuracy, all designed to work together to produce otherwise never seen before results! You defy the main stream, you scoff at the experts, you're a trend setter, a guru, a leader among leaders.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Quote Originally Posted by steelcomp View Post
    "You" make 500hp? LOL...That's rich. Why do all your posts sound so self-congratulating, sarcastic, jealous, and whining, like you're bragging "I'm better 'n you" when you've done absolutely nothing even worth mentioning? I mean, you've described above an engine that a 16 yr old might build as his first "performance" rebuild, and you make it sound like some magic legendary high performance miracle, and you're the Creator behind all it's glorious success. All whopping, earth shattering, -so you say- 500hp. (not) The parts were carefully researched, hand chosen, meticulously inspected and assembled with painstaking accuracy, all designed to work together to produce otherwise never seen before results! You defy the main stream, you scoff at the experts, you're a trend setter, a guru, a leader among leaders.




  16. #14
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    KOYOTA, if the boat had an Erson sticker on it then you should definatly run an Erson cam. Its a no brainer.

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