TRS nose cone worth doing?
 

just got home with my new old pantera. looking at that big fat ugly old drive and wondering if it is possible to make it slide thru the water any better and if it is better enough. orig power steering, not hydraulic. at least not yet anyway...only gonna be 400 to 450 hp this year. 5000 rpm tops this engine.

I've heard mixed results, but I believe the general consensus is it's a waste of money unless you're just looking for a little visual appeal.

I put one on a alpha for my velocity. It made a huge difference in transom lift and speed. It's about 5 mph faster and need much less trim to lift the boat out of the water. It means less leverage on the transom. So IMO it's the way to go. My velocity is around 425-450hp and I'm seeing mid to upper 70s with passengers. I'm not using it for low water pick up either. Just for the nose cone!

i had them on my boat for a while and i picked up a couple miles per hour although i did it mostly for looks. Then replaced a drive and took the other off to match so ive got two with the epoxy id let go cheap if you want to try it

Thats a old boat . Prob worth spending a little time on the bottom especially if you have tabs- square everything up . Fairly cheap speed potential , dang sure wont hurt.

I had them on my twin Trs Mirage race boat back in the 80,s did not see any speed. I have some on the Magnum I have now with raised Volvo driver same results. If there not put on properly there could be some determental results. If you look at many of the race boats running today in OPA how many have nosecones, not many if any. I there was some speed to be had they would all have them.
Raising up older drives like Merc Trs & even Volvo's to there optimum height & using today's props is were the speed is at. My Magnum I have now has old Volvo drives up 3" & Merc Mirage props, it works very well with or without the nose cones.

I put a nose cone on a TRS on a 1980 Spectra 24 , took it off soon after as handling was quirky ...my understanding since then
is the TRS drive is too deep in the water and a nose cone disrupts the hydro-dynamics .

ive heard from people on cigs that over 75mph they pick up 3mph

The help a little over about 68mph in SOME cases, that's right from Tom at Hydomotive telling me they just allow the prop cleaner water, nothing else.... nothing to do with lift, or going through water any easier, he explained the whole reason for them to me, the reasion you feel a lift or speed gain is because it's maximizing the prop efficiency.... makes sense to me but he said most boats don't see any real gains worth the cost till over 70++

and what does a 24-7 need for 70 mph with a TRS? somewhere north of 600 hp? won't be done this time around. and it'll probably be bravo converted in the next year or 2...

Hey guys. The purpose of a nosecone is to prevent prop blow out. If anybody has been thru it you know what Im talking about. It can be very scary. Prop blowout generally doesn't occur until around 85 mph. Prop blowout is when the regular lower unit builds up an air bubble around it approaching 85mph. When this bubble hits the prop the whole boat kinda falls down into the water as any lift you were getting is gone due to the prop loosing its grip in the water. Its like doing a nose dive at 85mph and the whole boat can totally spin out from the grip the bow gets when it falls. Very scary. The nosecone can actually scrub speed off your boat if you need lots of trim to run the boat correctly. Since it sticks out farther forward when you trim it it will create more drag into the water. I had one on an outboard checkmate with a 225 merc on it. It was actually slower than a stock unit. You mostly see it on boats that run over 85 with the height of the motor or outdrive allowing the prop to run even or higher than the bottom of the boat. It will also provide low water pickup for those applications. It is a general thought that unless your rig has natural bow lift and runs over 85mph spending money for it is a waste. I went thru it myself and found it to be correct twice before I learned.

I blew a drive 2yrs ago. I was not running nosecones, but wanted to. The replacement TRS I got had a nosecone. I thought this would be a great comparison between the 2. I can't tell the difference, trim angles are the same, RPM's the same, handling is the same and the list in the boat is the same. That dive does look cooler though. And the boat runs almost 80mph.
My $0.02

depeneds on the cone and speed . the hydramotive cone on my trs got 3 mph after 70

like i said. this guy is gonna be about 450 hp. so i may hit 70 if i can find a downhill part of the river...

+1 same result

Also, it has been suggested to not put nosecones on unless you have hydraulic steering. A nosecone adds surface area in front of the pivot point of the drive. A lot of added stress.