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Thread: Turbo Honda outboard
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02-12-2021, 07:20 AM #1
Turbo Honda outboard
Why has this not been done? It just seems to me that it would be a given that somebody with the required knowledge would have done a turbo application on a Honda outboard by now.
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02-12-2021, 07:43 AM #25000 RPM
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I don't think their gearcase could hold the torque of more horsepower.
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02-12-2021, 10:22 AM #3
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02-12-2021, 12:04 PM #4
There's a guy that did it in FL. Made the local news, then went national and was covered here. I believe they have issues with engine management though. They contacted us here at Dynojet about it, but we could only offer fuel control and they wanted timing control as well.
https://www.mynews13.com/fl/orlando/...-marine-engineKeith-
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Forkin' Crazy, RNM018 liked this post
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02-12-2021, 12:29 PM #5Supporting Member
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Honda and Tohatsu are the same product in the newer large four stroke outboards. 1.86 ratio with questionable strength if you were to surface it. The clamp assy. was not something I even wanted to deal with on my toon in rough LOTO conditions but the fuel efficiency, driveability, and overall refinement was great. They were never intended for high speed applications.
Joe
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02-12-2021, 12:41 PM #6
Yeah i saw the stuff they did on the V6.
https://www.haltech.com/product/ht-1...lite-2500-ecu/
That is the ecm they need to be able to tune the motor and make it work. If i was to do it i would start with the 115hp honda which is the K20 motor because of all the aftermarket support and try and boost it to the 300hp range. That motor can spin really good RPM then put it on something light for a boat so it is not TQ dependent to get out on plane.
Just a little Cat.
24 Twister V8 E-Rude (For Sale)
2008 Concept Sport Deck 2x 300X
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02-12-2021, 01:45 PM #7
I know of one person building wingplates for the Tohatsu 250hp engines... seems like two are going on a Cat in Florida.
David "Tango" Wilks
Current boats: (Not All Running...LOL)
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Capt.Insane-o liked this post
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02-12-2021, 08:28 PM #8
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02-13-2021, 12:24 AM #9
Oh yeah?
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02-13-2021, 01:14 PM #10
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02-13-2021, 01:18 PM #11
https://youtu.be/PZm11iP0EUU
yet another perfect example why bobs plates are junk.
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WavetoWave liked this post
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02-13-2021, 08:30 PM #12
KEITH , A coworker of mine was involved in that project . I offered them the Xb02 for a test mule , but they where not interested . I don't think they understood the difference it could have made !
Rich Martin 018HAVE BATTERIES , WILL TRAVEL !!!
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02-13-2021, 09:24 PM #13
Honda is not interested in a high performance outboard so they more than likely asked or even paid the guys to stay away from that. If Honda wanted to I`m sure they could take the high performance outboard world by storm.
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RiverRat71 liked this post
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02-13-2021, 09:46 PM #14
Seems like a R1 super bike engine would make a good candidate. 1 liter, 200hp and 14,000rpm. Grated a bit low on toque at 80ft lbs.
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02-13-2021, 09:59 PM #15
Maybe on a kneel down with a tiny prop....Doug and I get a few things out of the way we will get to it. We are on a tin boat mission right now so when those are done we will see. I've been in a lot of Honda gearcases and don't see a problem there. The metallurgy of the gears is excellent, and the propshafts are very forgiving. Plus they are basically parts binned from their automotive and the tuners have been modding those motors for 20 years.
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