Logs n Snails Question
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Logs n Snails Question

  1. #1
    History Repeating Storz's Avatar
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    Default Logs n Snails Question

    Is it possible to use a 4" exhaust tip with stock style Hardin logs and snails? With the log and snail set up do the exhaust tips need to have flappers?

    This is what I am working with...
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

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    Default exhaust

    Stay with me on this one. You can take the 3 inch exhaust hose and put it on the riser tip, then take 3 .5 exhaust and put it over the 3 inch hose and you will be able to gat a set if 4 inch tips that are necked down to 3.5 inches on the inside of the boat. 4 inch on the outside and 3.5 on the inside of the boat. No gains in performance but you can get the 4 inch tips to work.

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    Excellent idea. Can an existig set of 4" tips be necked down to 3.5"? Only reason I ask is I may have a line on a nice set of 4" angle cut tips
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

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    Boat Nut sleekcrafter's Avatar
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    all comibinations work as GS expainled. Answer to the flapper question is: most always a flapper tip is needed, keeps the water surge from hydro locking the motor.
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    Default Flappers

    Quote Originally Posted by sleekcrafter View Post
    all comibinations work as GS expainled. Answer to the flapper question is: most always a flapper tip is needed, keeps the water surge from hydro locking the motor.
    30 years, no flappers, no problems....That said, there are steps you can take to prevent any surges.....Like, if the engine should quit, turn the boat as the speed comes down to avoid your own wake catching you from behind. If slowing on purpose, watch the wave catching up, and burp the throttle enough to level the boat out as it gets there.....Obviously, if the water line is above the top of the snails, you've got some issues to deal with, but most jets, although not all, have enough freeboard to be OK......Ray
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    Boat Nut sleekcrafter's Avatar
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    Default

    Ray... most issues are when the boats are beached, or sitting tied up. rollers will push water right on in, over the riser. I've made HD flappers for three Wriedt Spoilers, two Taylor SS', and one Taylor LP. These are local river boats that has hydro locking problems. Even standard flappers woud occaisionaly get sucked in, and allow water intrusion.
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    Senior Member kdub's Avatar
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    Default

    you can get bellows that are 3" to 4" step ups for about $30 on ebay. Used some on an Anthony with the same logs and work great

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    Default

    Cp sells stainless steel "in-line reducers" so you can connect 3" to 4" or 3.5" to 4" hose. I stepped up to a 4" hose exhaust system in an old boat that had 3" hose mufflers already that I did not want to replace so these allowed me to go from 4" to 3" but obviously they will allow you to go from 3" to 4" .

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    Default Yeah.....

    Quote Originally Posted by sleekcrafter View Post
    Ray... most issues are when the boats are beached, or sitting tied up. rollers will push water right on in, over the riser. I've made HD flappers for three Wriedt Spoilers, two Taylor SS', and one Taylor LP. These are local river boats that has hydro locking problems. Even standard flappers woud occaisionaly get sucked in, and allow water intrusion.
    Yeah, I guess that could be an issue. Especially with the wake barges that want to run the beach showing off to people that really don't want to watch....Then again, I usually anchor out a ways, bow out, with the ass end tied off to a "doggie stay".........It seems one time caught by lowering water, high, and almost dry, cures "beaching"........Ray
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    Default

    Quote Originally Posted by Storz View Post
    Is it possible to use a 4" exhaust tip with stock style Hardin logs and snails? With the log and snail set up do the exhaust tips need to have flappers?

    This is what I am working with...
    Hey Storz I have another set of through bolt harmon marine logs/snails. I am cleaning/polishing for resale. The snails have the step down for both 3' and 3 1/2". You can also add a small piece of 3 1/2" hose on the snail to get 4" . These are the best logs for a ford and do not leak.
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    Quote Originally Posted by krusn56 View Post
    Hey Storz I have another set of through bolt harmon marine logs/snails. I am cleaning/polishing for resale. The snails have the step down for both 3' and 3 1/2". You can also add a small piece of 3 1/2" hose on the snail to get 4" . These are the best logs for a ford and do not leak.
    Appreciate the offer but I am going to stick with the ones I have, they are original to the boat and dont leak etc.

    I bought a set of nice 4" tips off of another member on here, and per kdub's suggestion picked up a 4" to 3" Mercruiser brand bellow reducer off ebay this morning. Going to attach the 4" side of the bellow to the exhaust tip and then just use a small piece of 3" stainless exhaust tubing to connect the 3" side of the bellow to the stock 3" tubing coming off of the snail
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

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    Anyone ever added these to a set of tips that done have flappers?

    http://www.cpperformance.com/p-12576...t-flapper.aspx
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

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    tintingsandiego krusn56's Avatar
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    Default

    Quote Originally Posted by Storz View Post
    Anyone ever added these to a set of tips that done have flappers?

    http://www.cpperformance.com/p-12576...t-flapper.aspx
    If your going with 4" these are the way to go.... http://www.eddiemarine.com/store/car...l&p=11431&c=59 I have the style you just posted and burnt them out in one season. I removed and reinstalled the same because I have 3 1/2" ss tips but now when I am done boating , I spray the inside with water based tire dressing to keep them from cracking.
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    Did you have to weld anything with the flapper type that you currently have on the 3.5" tips?
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

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