LS Build: In Progress
04-11-2021 | 01:08 PM
#523
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From: San Tan Valley AZ
Not yet. Should be on water in 30 days or so. Just finished cut and buff below rub rail on paint job. Another week-week and half for top then back together she goes. Literally polished/powdercoated/reupolstered etc everything in boat. Full resto.
07-01-2021 | 04:16 PM
#524
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From: Harrington DE
The lt4 is a different beast than mine. It is direct injected with a higher compression and heads that flow 50cfm more out of the box. The lt4 supercharger will not work on ls applications due to wrong port match and no injector bosses. This dyno run is at 148kpa/7.1psi boost. Had belt slip which you can see in posted dyno log. It is cable driven throttle. We are using the factory intercooler modified with gusseting to prevent collapsing it under sustained load. Cooling is raw water ran through an iron ly6 block no thermostat. If you go aluminum block you will have to go closed cooling because block temp must rise to I would say 160 to allow bearing clearance to grow otherwise you will dstroy engine. We should see upwards of 9psi when belt slip is corrected which will easily push us over 800. Yes it is 1.9 tvs. Keep in mind that I am barely using the potential of this supercharger. With a lower pulley change we could be upwards of 16-18psi. But would require e85
11-04-2021 | 08:52 AM
#526
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From: San Tan Valley AZ
I think you better run closed cooling or you will murder the mains when the aluminum block fails to heat up and expand the bearing clearances. Otherwise its a great engine. I personally would do an l8t. You get an iron block which is only a few more pounds but you get a long stroker 6.6L. A cam swap would be easy 550hp
11-04-2021 | 09:51 AM
#528
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From: San Tan Valley AZ
life. Its all finished up. Just havent had time to take it out. We went straight from that to my GTO repaint/ tremec tkx swap/ etc to my yard on my house. In the last month I built 1400ft of pipe fence, laid 4000sqft of grass, and about 200 tons of rock/dg. Finishing that up currently. I will update when we get it out. Maybe after holidays.
Last edited by mggdoors; 11-04-2021 at 09:54 AM.
11-04-2021 | 10:42 AM
#529
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From: North of germany
I think you better run closed cooling or you will murder the mains when the aluminum block fails to heat up and expand the bearing clearances. Otherwise its a great engine. I personally would do an l8t. You get an iron block which is only a few more pounds but you get a long stroker 6.6L. A cam swap would be easy 550hp
I´m in germany....no chance to get a 6.6L.
But....it would be a nice project....if i need 800hp+
Last edited by neuer_Typ; 11-04-2021 at 10:46 AM.
01-28-2022 | 10:48 AM
#530
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if you were to build this more for a midrange torque and go NA and no stroker kit, would 317 or even 243 heads work well instead of the LS3 which I believe like higher revs? trying to spec out my 6.0 NA build for small lake boat but want good get up for ski.
