LS Engines Maybe the future of I/O's
02-18-2024, 08:01 AM
#101
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Another downside to LS is less torque. Especially with most boats only having 1 speed transmissions its very hard to prop a boat high enough and actually turn the prop to get there. Similar struggle with N/A engines. There's a ton of claims of big HP N/A but rarely do they actually push a boat to the same speed as forced induction that makes the same HP, since the forced induction usually makes much more torque. You can make all the calculated HP you want on the dyno and all the rpm but if you can't actually put that to use in the water with the correct prop none of it really matters.
Here is a comparison between LS engines (Black) and a 540 with a roots blower (Red) that use to push a 38 Cigarette around. TQ is not lacking.
02-18-2024, 10:13 AM
#103
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02-18-2024, 10:13 AM
#104
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if someone wanted to get a good jump on a blown ls motor,,this looks good.
https://www.ebay.com/itm/29619991438...Bk9SR-7s1863Yw
https://www.ebay.com/itm/29619991438...Bk9SR-7s1863Yw
02-18-2024, 10:15 AM
#105
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Twin O/B Sonic (02-19-2024)
02-18-2024, 10:28 AM
#107
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I would like to know how much different that motor is compared to the LT4Base marine motor GM offers. You look at the GM performance web site and they have one you can buy for the street and one for marine that is sold to integrators but no details on the differences.
For me with a 30 foot boat two of those would be a blast in it.
For me with a 30 foot boat two of those would be a blast in it.
if someone wanted to get a good jump on a blown ls motor,,this looks good.
https://www.ebay.com/itm/29619991438...Bk9SR-7s1863Yw
https://www.ebay.com/itm/29619991438...Bk9SR-7s1863Yw
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sutphen 30 (02-18-2024)
02-18-2024, 10:37 AM
#109
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Just like any other marine engine they have been built to run at continuous maximum power output.
Ive said this before, but the only thing stock LS about these engines is the blocks. And they have been modified. Everything from the rings to the springs are what we run in marine big blocks, and those parts were selected with high output endurance in mind.
Last edited by Precision; 02-18-2024 at 10:42 AM.
02-18-2024, 10:46 AM
#110
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I understand nothing stock at that level nothing on a BBC is either. 200 hrs is pretty good at 1000+HP, not sure how many BBC's last much longer at that level. But I do not have a lot of personal experience, and most people I know at those levels are racing.
Bit of a different thing.
Don't you have these in a old Fountain race boat?
Bit of a different thing.
Don't you have these in a old Fountain race boat?
Right now they have 200hrs on them. I have run 20lbs from Margaritaville to Dog days a few times. Anything above 75% throttle is full boost.
Just like any other marine engine they have been built to run at continuous maximum power output.
Ive said this before, but the only thing stock LS about these engines is the blocks. And they have been modified. Everything from the rings to the springs are what we run in marine big blocks, and those parts were selected with high output endurance in mind.
Just like any other marine engine they have been built to run at continuous maximum power output.
Ive said this before, but the only thing stock LS about these engines is the blocks. And they have been modified. Everything from the rings to the springs are what we run in marine big blocks, and those parts were selected with high output endurance in mind.
