LS1 jetboat
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A friend wants to put a LS1 in a jetboat. The only thing we are wondering about is the O2 sensors. Since water runs through the exhaust manifolds, what's the solution? Is there a way to tune without O2s? Any ideas?
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well how do the ski boats using inboard ls1's work it? regardless could always run dry exhaust, depending on how it's routed (i.e. not through transom) most the olds/berkley setups run dry exhaust I believe.
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You could only do dry exhaust if you have an open engine bay, and the headers go over the transom. You need a muffler then though (water in the exhaust is considered a muffler).
Your O2s would hardly ever get used though, usually when cruising in a boat, you are in PE mode, ignoring the O2 sensors anyway.
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PE entry could be tailored to prevent premature calculation entry
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Those end up to be around $1K or more after they are shipped from Austrailia.
Here is a cheaper option:
https://ls1tech.com/forums/conversio...manifolds.html
The manifolds are about $250 each and are the same for left or right side. The risers/elbows are about $150 each.
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Aother option, 351 cleveland manifolds, I've got a pair, cheap but not always easy to find.
https://ls1tech.com/forums/conversio...ttom-boat.html
https://ls1tech.com/forums/conversio...ttom-boat.html
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Aother option, 351 cleveland manifolds, I've got a pair, cheap but not always easy to find.
https://ls1tech.com/forums/conversio...ttom-boat.html
https://ls1tech.com/forums/conversio...ttom-boat.html
Here is the PCM manifolds a little cheaper
http://www.skidim.com/prodinfo.asp?number=R028023
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How would you weld the inner side of the manifold for an o2 bung?
I want to EFI my volvo/penta 280 by using an old TBI set up and megasqirt. I would run it speed density but need my wideband for initial tunning.
How else could I tune it?
I want to EFI my volvo/penta 280 by using an old TBI set up and megasqirt. I would run it speed density but need my wideband for initial tunning.
How else could I tune it?
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The area circled in red is the EGR crossover port
![](http://i391.photobucket.com/albums/oo356/gearhead74/Misc/SB_Exhaust_Manifold_JPG-510x384.jpg?t=1264548009)
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You could also take the motor to dyno shop and get a first class tune.