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Anyone near their boat to take a quick measurement?


Ndawg12

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Anyone with the regular black exhaust ports and rubber flappers? I could really use the exact inside diameter of the outer ring. Thinking it's 4 or possibly 4 1/8.....?

Thanks!!

post-8316-0-85155900-1431112125_thumb.jp

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i've got 5.075" id on the protruding outer ridge. judging from your pix this is the number you are looking for.

the hole/port for exhaust is about 3.6". i could not get the calipers far enough into that outer ridge to call this measurement accurate.

Edited by tvano
  • Like 3
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i've got 5.075" id on the protruding outer ridge. judging from your pix this is the number you are looking for.

the hole/port for exhaust is about 3.6". i could not get the calipers far enough into that outer ridge to call this measurement accurate.

super awesome, thank you very much!!

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super awesome, thank you very much!!

I'd say so! Six minute response time and requested measurement down to 1/1000th of an inch. This site, and tvano in particular in this case, rocks!

  • Like 3
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Tvanos measurement was dead on and the project is ahead of schedule, thanks again!

Project? pics, details,

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Peace of mind 2nd measurement backs up tvano. However, I'd say it was closer to 5.081". Just sayin'.

Huh. My two are 5.050" and 5.045".

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Why did I even.... 2 1/4 teed into 3"

Neat idea for a home built is this a prototype and you're going to get someone with a die bender to bend the final product? The exhaust kinker that they used for those bends ads restriction below your 2 1/4 initial size.

A 90 made with a proper bender looks like this:

hed-12016_w.jpg

Edited by oldjeep
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I realize that and if I see a significant performance loss I may look into it or rip it off and say "well that was fun". I have $40 into the project. I figure "the real system" tees into 2.5"...? My 2 kinks should still allow more flow than that.

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I was just making an observation vs. the "real" thing, which uses 3" tubing throughout IIRC.

Carry on! I want to see the finished result! Are you going to pinch the downpipe like the other guys do?

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I was just making an observation vs. the "real" thing, which uses 3" tubing throughout IIRC.

Carry on! I want to see the finished result! Are you going to pinch the downpipe like the other guys do?

I asked that question a while back and got crickets... it sure doesn't look like 3" all around but if it is then I'm way off....

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  • 2 weeks later...

I had the hose clamps as tight as I could comfortably get them before I stripped them And the down pipe turned up about 30 degrees. Do you think I can run screws through the hose and into the pipe to prevent this? Any other options?

20150520_180827_zps5mtqw2xa.jpg

20150520_180837_zpskeunllxy.jpg

Edited by Ndawg12
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pretty sure the other guy's fix was the drill hole and screw like you are suggesting. I couldn't get my old one tight enough without the t bar clamps (it would fall off of exhaust tip at transom).

How'd it work? rooster? Any impact on wave?

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pretty sure the other guy's fix was the drill hole and screw like you are suggesting. I couldn't get my old one tight enough without the t bar clamps (it would fall off of exhaust tip at transom).

How'd it work? rooster? Any impact on wave?

It was awesomely quiet for the first 5 minutes or so but when I sped up to around 20 for the first time I think is when it moved. Appears there's a tiny bit of spray as I idled up but I doubt it will affect the wave. It definitely has potential. I may paint it this season and run it, then take it off and have our welders at work follow the template with all 3" stainless on rainy days this winter.

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