That is wild. I’ve seen as much as a 2 mph gain on a 75 mph boat by changing the insert. Guess every boat really is different.
I wish it was an inch shorter so it the top of it wasn't so close to the transom. Aside from that, it's a beautiful part.
whatever it takes! lolI saw somewhere that a person can make throttle linkage for turbo jet boats from just about anything..... even a road sign
you know, in case you hit a snag
She likes to party.
I had the same problem with a boat I built years ago....before I knew about Duane. I just drilled a small (.040"?) hole in the top of the bowl and then drilled to 3/8" deep enough to put some pipe threads in it for an elbow so it didn’t look like a damn wave runner. Worked fine. A 0.040" leak isn't enough to effect performance.
I’ll be right behind you!I'm making it a point to come up river that weekend
Do you have to ask!
Yore killin me, it’s a Hondo not a SchiadaWell, I don't think I've ever seen the Hondo on the water with my own 2 eyes.............
2 weeks!!!!Yore killin me, it’s a Hondo not a Schiada
I will admit it hasn’t been up River much past the bridge in years
Have you considered running a dump valve to regulate the water pressure to the engine from the pump. I run an industrial water steam pressure safety dump valve myself that is set to 15 psi. Once it hits that it opens and allows it shoot water out of a an-12 line I rigged too it.
Not to belabor the point but I agree with you. I have ALWAYS used a Circle Seal L500, 1/2 relief. It allows everything through, until 15 PSI, then the excess goes out the side of the boat. It is amazing to watch just how far that thing shoots water out. (On my Jets)
This is what I run an Apollo brand
that's the plan. was just short on time/parts so I worked with what I have.
If I can make it run on spring pressure I will. If I can't, then I'll set up a boost controller. The parts are there, we just have Time to plumb it.
In any case, thanks for taking us along on this build. Very much enjoyed it. 21 Daytona is my all time favorite boat
My understanding from my turbomustang.com days is that running spring only you get more inconsistent and lower boost pressure at lower RPMs and then with a ebc. The ebc can apply pressure on the spring to force it closed till you need it too. Only time you want to use big springs is to fight creep and you are running a health waste gates setup with the proper angles so you should be great. Also make sure your wastegate valves are rated for lead fuel as well.
The great thing about running a huge impeller is cavitation isn't as big of an issue as it is when you run a small impeller. My other boat hole shots with 3psi of boost and doesn't cavitate because I run a AAA impeller in it. That boat has a boost controller, too, but I've yet to need to turn it on. It makes the target boost pressure 1 second into the run and stays there throughout the run. Not saying this boat won't need a controller but we'll have to see.
That's true but what I was referring to was a different sensation...the engine rpm wasn't slowing down as I backed off the throttle. My other turbo boat does the same thing. It takes a big change in throttle blade opening percentage to affect the engine rpm once the turbos are spooled.
Couldn't an electronic boost controller help with that?
Perhaps. I think Pete Harrell explained it pretty well; Im shutting the throttle blade slightly but the turbos are already shoving more air into the engine than It can flow so even though I'm backing off the throttle, the engine rpm isn't dropping right away.
I run Co2 because the delivery system is very simple; its just a 2.5 lb compressed air bottle and a solenoid valve. Compressed air requires a storage tank, electric compressor etc... its just more stuff taking up room in the boat and eating up precious amps from the charging system. I don't mind refilling the C02 bottle periodically and if there's ever a leak in the system and I end up with no Co2 I can still hold the jet drive bucket open with a bungee cord or the string off my swim trunks and a few smashed up beer cans stuffed inside the pop off valve will hold it closed. lol there's always a way to get back to the trailer if stuff goes wrong.
I totally understand making things work to get back to the trailer. My uncle's throttle cable broke once so we pulled the clamsheels off (Merc Outboard) and used the pulsating cord tied to the throttle arm while he sat in the back and my buddy was steering and shifting. My uncle thought it was hilarious to goose it with zero warning and watching my budy squirm.
@cyclone what impeller?
