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Originally Posted by 242LS
(Post 4677721)
You almost want to go straight to a museum so it doesn't get dirty. Beautiful.
BTW - Does anyone have the dyno sheet/numbers for a stock Merc 330 or 420? I'd love to see how the torque numbers compare. close to a merc 420. Also a LS3 crate. Similar hp, different torque curve for sure. https://cimg3.ibsrv.net/gimg/www.off...47cb822f61.jpg |
Btw. I will be doing a b testing on the coolant system. Both are setup with 160 thernostat. One has 2 holes drilled. One has 3. I will be running them monitoring temperature stability and water pressure when we do get out and about. Figured it would be a good idea so people know what to expect when the give this a go |
Originally Posted by 242LS
(Post 4677721)
You almost want to go straight to a museum so it doesn't get dirty. Beautiful.
BTW - Does anyone have the dyno sheet/numbers for a stock Merc 330 or 420? I'd love to see how the torque numbers compare. |
Originally Posted by 242LS
(Post 4677721)
You almost want to go straight to a museum so it doesn't get dirty. Beautiful.
BTW - Does anyone have the dyno sheet/numbers for a stock Merc 330 or 420? I'd love to see how the torque numbers compare. |
I took MILD THUNDER's 454HO chart, eyeballed the actual numbers and plotted against my LS3 and 509/AFRs/cam (the LS looks just fine for torque now):
https://cimg4.ibsrv.net/gimg/www.off...7c5da20cd.jpeg |
The LS3 crate is 10.7:1 static, where the 454HO is 8.75:1. I can see where the big block would shine , in the lower rpm and acceleration department.
Suprised the 6.2L LS3 doesnt make more torque, a 6.4L hemi makes around 475ft lbs. |
Originally Posted by 242LS
(Post 4677737)
I took MILD THUNDER's 454HO chart, eyeballed the actual numbers and plotted against my LS3 and 509/AFRs/cam (the LS looks just fine for torque now):
I personally will not build high RPM boat engines again. To achieve my PK HP and speed I was spinning my engines ~6500 RPM that pushed my "legit" cruise speed to 5000 RPM's. There was never a real balance in prop pitch selection. Either spin the s#it out of them with a small wheel or load the engines with a bigger prop. Engines ran great, but running engines 6000+RPM's for miles that you hand built with your hard earned money just makes your guts pucker. |
Originally Posted by mggdoors
(Post 4677727)
Dirty. That would be my gto currently. Redoing turbo plumbing at the same time as this build. Its a f******ing mess right nowhttps://cimg3.ibsrv.net/gimg/www.off...34cd668e4.jpeg |
Originally Posted by 242LS
(Post 4677737)
I took MILD THUNDER's 454HO chart, eyeballed the actual numbers and plotted against my LS3 and 509/AFRs/cam (the LS looks just fine for torque now):
https://cimg4.ibsrv.net/gimg/www.off...7c5da20cd.jpeg
Originally Posted by 14 apache
(Post 4677768)
be carful plastic hose on wastegates it will melt off if you run it hard enough at least in a boat it will. Came back from a ride in my vdrive and nothing was hooked up and making big boost. Lo |
Originally Posted by Rookie
(Post 4677755)
Nice numbers.
I personally will not build high RPM boat engines again. To achieve my PK HP and speed I was spinning my engines ~6500 RPM that pushed my "legit" cruise speed to 5000 RPM's. There was never a real balance in prop pitch selection. Either spin the s#it out of them with a small wheel or load the engines with a bigger prop. Engines ran great, but running engines 6000+RPM's for miles that you hand built with your hard earned money just makes your guts pucker. |
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