Scarab 377 speed and stuff
09-08-2023, 08:13 AM
#31
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Bill Lawson at ateco engines near chicago has a 377 raised deck scarb named dazzlement. Super cool old boat. Same style as yours. He may be a good person to talk to. He's had the boat a long time and is gonna try to get it back in the water for next season. Here's a picture of his boat. There was a monogram model sold with it's likeness back in the eighties.
09-08-2023, 09:10 AM
#32
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Thread Starter
I won't forget it. I really like this boat and I would like to hold onto it for a while. I always wanted an old wave-crusher and was hoping to go 75-80. I know there will always be faster boats out there but I really like 80mph haha
09-08-2023, 11:18 AM
#34
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tommymonza (09-09-2023)
09-08-2023, 08:09 PM
#35
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Really nice clean 377. Great find.
177s as you know are pretty small for a 540. But it will probably get you over the hump of performance. The 177s have a peak rpm of about 15k, but that is totally maxed out.
Lots of good threads on here about 177s. They can push some air, and coupled with modern head and cam tech, they are better yet.
There is a limit where the heat generated by the blower at the limit, will super heat the air to the density where it would be the same NA or worse off. You still have the parasitic losses.
When the blower cases get heat soaked...they will open up the clearances...making them less efficient. So a dyno pull is not the same as a sustained run at close to or WOT.
Reading the B&M Magazine data book from 1990, they really did a good job of dialing in their 420s with the twin rotor using teflon strips and good rotor design. The twin opened up some volume compared to the triple screw roots, why they are considered a 7-71.
Some prop changes can make a world of difference. Bblades can help with that.
177s as you know are pretty small for a 540. But it will probably get you over the hump of performance. The 177s have a peak rpm of about 15k, but that is totally maxed out.
Lots of good threads on here about 177s. They can push some air, and coupled with modern head and cam tech, they are better yet.
There is a limit where the heat generated by the blower at the limit, will super heat the air to the density where it would be the same NA or worse off. You still have the parasitic losses.
When the blower cases get heat soaked...they will open up the clearances...making them less efficient. So a dyno pull is not the same as a sustained run at close to or WOT.
Reading the B&M Magazine data book from 1990, they really did a good job of dialing in their 420s with the twin rotor using teflon strips and good rotor design. The twin opened up some volume compared to the triple screw roots, why they are considered a 7-71.
Some prop changes can make a world of difference. Bblades can help with that.
Last edited by Tartilla; 09-08-2023 at 08:15 PM.
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Franks292 (09-10-2023)
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Franks292 (09-10-2023)
09-08-2023, 09:31 PM
#37
I mean, you might as well try those 4-blade 26's----so put them on, give it a whirl and let'r buck
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Franks292 (09-10-2023)
