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  1. #1
    Canoe Jockey Michael Thomas's Avatar
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    Does anyone manufacture performance logs and risers? I have jet boat style hardin marine garbage. I was looking for something that is a performance replacement. Any help?
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

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    Creepiest Jet Boat Dude! T8er S.'s Avatar
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    Last edited by T8er S.; 12-28-2012 at 08:11 AM. Reason: gotta have a reason?
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    Senior Member johnf's Avatar
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    Hello, There is a thread "Headers vs logs" It is pretty usefull to see the gains that you get from something other than stock logs!! Check out some of the engines with turbos and blowers with stock logs amazing. I wanted to put headers but now I'm going to keep my logs. Good Luck Johnf

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  6. #4
    Senior Member bp298's Avatar
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    there's a number of them.
    if your engine compartment is closed, you could use something like this. there are other brands with similar stuff. just so you're aware, water jacketed stuff is not cheap.
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    bassett makes some thru-hull headers. but the engine compartment needs to be open.

  7. #5
    New here Beer:30's Avatar
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    Basically, nothing is free. A lot of people don't like LOUD boats, but sound and HP go hand-in-hand. Top fuel dragsters don't run logs and mufflers going down the drag strip - they have short zoomies with no mufflers, minimal bends. So, logs and snails are generally made to be cool, quiet, and compact. However, they don't scavenge and in most cases they restrict exhaust. Therefore, you get reduced performance, but nice and cool and quiet.

    Headers or performance manifolds cost more - that's a given. You are paying for near-zero restriction and in most case, some level of cylinder scavenging. If the DIDN'T WORK, they would not be so plentiful and so costly. If logs were the hot ticket, everyone would be running them. Additionally, performance exhaust WILL be louder than logs - since there is more flow and less noise-cancelling restriction(s). Most of us are fine with louder, but sometimes family is not. So, you sometimes need to balance that whole scenario.

    Stainless is naturally more expensive than coated steel, but you don't have corrosion issues.

    So, bottom line - you get what you pay for. Performance, sound, quality.
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  8. #6
    Senior Member bp298's Avatar
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    Quote Originally Posted by Beer:30 View Post
    Basically, nothing is free. A lot of people don't like LOUD boats, but sound and HP go hand-in-hand. Top fuel dragsters don't run logs and mufflers going down the drag strip - they have short zoomies with no mufflers, minimal bends. So, logs and snails are generally made to be cool, quiet, and compact. However, they don't scavenge and in most cases they restrict exhaust. Therefore, you get reduced performance, but nice and cool and quiet.

    Headers or performance manifolds cost more - that's a given. You are paying for near-zero restriction and in most case, some level of cylinder scavenging. If the DIDN'T WORK, they would not be so plentiful and so costly. If logs were the hot ticket, everyone would be running them. Additionally, performance exhaust WILL be louder than logs - since there is more flow and less noise-cancelling restriction(s). Most of us are fine with louder, but sometimes family is not. So, you sometimes need to balance that whole scenario.

    Stainless is naturally more expensive than coated steel, but you don't have corrosion issues.

    So, bottom line - you get what you pay for. Performance, sound, quality.
    bassett thru hulls aren't any louder than logs/snails. exit is at the same point. the only increase in noise, if it could be called that, slight rattles at idle. but at idle, they're just as quiet as logs/snails. and running down the lake, no difference in "loud". over the transom headers, no question louder. but he didn't ask anything about noise level.

    both bassetts (open engine compartment) and lightning type water cooled thru hull headers (open or closed engine compartment) will improve performance over logs. but this discussion was already on another thread. if you have a relatively stock type engine (which is likely already running logs), you're not going to see a "tremendous" performance improvement. some, yes. 10 or 15mph, no.

    you can probably get a set of basset thru-hulls for 1200 or so. maybe more. lightnings could be 3000-4000 by the time you're done. there are other brands of water jacketed headers that are going to be somewhere near the lightnings in price. point is, they're cool and all, look bitchin, and you'll get a few more rpm out of a relatively stock engine. but with headers vs logs, you'll want to take advantage of the breathing capability and pump the engine up. if you're not interested in spending the dough to pump the engine up, you're not taking advantage of what the header gives you.

    kind of a catch 22. if you build a 650-700hp engine, you won't want logs because they won't allow the thing to breath and make the power you just paid for. but if you get a high dollar set of thru-hulls without much more than a stock engine, the engine doesn't have the ability to take advantage of the header's value.

  9. #7
    Senior Member johnf's Avatar
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    .

    kind of a catch 22. if you build a 650-700hp engine, you won't want logs because they won't allow the thing to breath and make the power you just paid for. but if you get a high dollar set of thru-hulls without much more than a stock engine, the engine doesn't have the ability to take advantage of the header's value.[/QUOTE
    My thoughts exactly!!!!!!

  10. #8
    Canoe Jockey Michael Thomas's Avatar
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    This is what I want to replace. It does have a engine cover. I would like to keep everything in the engine box. The exhaust hole in those logs is 2.750" You would think that a larger exhaust might give me a little more performance.
    I think my new goal is to use a efi bird with new exhaust. I have the dyno sheets on the engine.We ran a dyno pull without the chiller...and then a pull with the chiller. I am sure the logs are robbing power.
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  11. #9
    Senior Member bp298's Avatar
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    Quote Originally Posted by Michael Thomas View Post
    This is what I want to replace. It does have a engine cover. I would like to keep everything in the engine box. The exhaust hole in those logs is 2.750" You would think that a larger exhaust might give me a little more performance.
    I think my new goal is to use a efi bird with new exhaust. I have the dyno sheets on the engine.We ran a dyno pull without the chiller...and then a pull with the chiller. I am sure the logs are robbing power.
    i don't know of anything else you could put on there and keep that engine box the same as it is. no question, the logs are not beneficial for that engine. i'd go with lightnings or cmi's and remodel that box.
    but if the partial engine cover box you have is critical for your purposes, i think you're basically stuck with what you have....

  12. #10
    Senior Member johnf's Avatar
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    Quote Originally Posted by bp298 View Post
    i don't know of anything else you could put on there and keep that engine box the same as it is. no question, the logs are not beneficial for that engine. i'd go with lightnings or cmi's and remodel that box.
    but if the partial engine cover box you have is critical for your purposes, i think you're basically stuck with what you have....
    I think a family boat and also a race boat are a good idea!!!!

  13. #11
    Canoe Jockey Michael Thomas's Avatar
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    The other boat...lol
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  14. #12
    Senior Member johnf's Avatar
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    Quote Originally Posted by Michael Thomas View Post
    The other boat...lol
    Wow!!! Very nice stuff. Have any vidio of them in action??

  15. #13
    Canoe Jockey Michael Thomas's Avatar
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    I found that Bassett had what I am looking for..Bassett Racing Photos
    $2200 for 2 1/4 x 4 exhaust log.... not bad I thought that is quite doable...Then I noticed the risers were not included and thats another $1500....Knowing the boating game all to well...thats a $4000 modification. Also I am considering to adding a efi bird...do I need bungs on the dry side for some kinda of sensors
    Last edited by Michael Thomas; 12-29-2012 at 12:56 PM.
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

  16. #14
    Canoe Jockey Michael Thomas's Avatar
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    Last edited by Michael Thomas; 12-29-2012 at 01:18 PM.
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

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