6.5 turbo diesel with 4 inch exhaust turbo sound

Test run the 6.5 Chevy turbo diesel. The 4 inch exhaust is 32 inches long. Put some headphones on and hear it the way it really sounds. It is pretty loud inside the boat. We'll need earmuffs to test the boat in the water until I build the engine cover. 6/2/11 and it should be in the water soon!

Category:

Autos & Vehicles

Tags:

• popeye
• 6.5 turbo
• gm diesel
• boat diesel
• boat diesel conversion
• romany 21
• loud diesel
• 4 inch exhaust
• 4 exhaust
• turbo
• whine
• short stack
• fresh water cooled
• marine diesel
• bravo one
• mercruiser
• chevy 6.5
• chevy diesel
• headphones
• whaleback
• fishing boat
• home built
• conversion
• 6.5 turbo diesel
• diesel exhaust
• marine injectors
• fish killer
• sturgeon smasher

[spencyg80]

Any progress? Really looking forward to seeing how this turns out. Also interested to see whether the outdrive lasts very long behind that beast of a motor. PLEASE UPDATE!!! :)

[kimmer6]

@spencyg80 Progress indeed. The heat exchanger is mounted, instruments and wires almost finished, all old holes in the hull are epoxy glassed over (rudder post, old exhaust, propeller shaft log), the engine oil cooler and power steering cooler is almost done, tilt&trim hydraulics function, new steering cable, shift & throttle cables finished, power steering is complete. The Bravo One outdrive is beefy! Need to connect plumbing and finish mods to trailer to test it. Maybe 2 weeks?

[kimmer6]

@kimmer6 Wow, what a lot of work. Sept 24, 2011 I finally put antifreeze in the cooling system today. EVERYTHING had to be hand made. The battery box should be in tomorrow and the oil will be changed in the outdrive. It was prepped for running a heater in the cabin using engine coolant. The wiring is done, gages work, and the cable tachometer was made to work using the oil pump drive. The seawater side of the plumbing is done. Maybe test it this week in the marina...

[79W200]

Ok got a few questions looked like in the other movie your just running stock truck manifolds did you just plumb a water line into the down pipe off the turbo to cool it? Do you think the stock manifolds will get too hot without air flowing past them like in a truck? Sorry for all the questions just lookin at doin the same thing to my 27 foot cabin cruiser ditching the gas hog 351 ford engine.

[kimmer6]

@79W200 The stock manifolds were used with a stainless flex pipe in the crossover. The manifolds and pipes were painstakenly wrapped in heavy aluminum tape, fiberglass cloth soaked in waterglass (sodium silicate), more aluminum, a layer of fiberglass tape embedded with 3M fire barrier compound, then 2 layers of fiberglass tape with epoxy resin painted on to make a hard shell. The bolt holes were a pain. I did a similar thing on another boat and once the materials cooked it lasted years.

[kimmer6]

@79W200 I got rid of the GM turbo elbow and went with a 4" stainless tube with perforations surrounded by a copper pipe. The water surrounds the inner pipe and flows through the perforations to mix with the exhaust. I want to test the boat soon. I had to build another trailer for the boat that sits a foot lower yet has more driveway clearance. Now I can get going on finishing and testing the boat, soon, I hope!

[themistoklisful]

hallo my friend very good job im from greece and i bought a romany 21 last year since then i fabricate new engine,new floor windows and more. i use a lot of wood iroco i will upload soon when finished and again nice job

[spencyg80]

@kimmer6 Sounds Great. Were you able to find a complete Bravo drive with transom hardware, hydraulics, etc, or did you have to piece something together? I just bought an Allmand 25 which I'll be doing a very similar converstion to, except its already configured for I/O (old OMC Stringer) and I'm strongly considering a 4BT for a power plant...very very interested to see your outcome.

[spencyg80]

@kimmer6 Sounds Great. Were you able to find a complete Bravo drive with transom hardware, hydraulics, etc, or did you have to piece something together? I just bought a Allmand 25 which I'll be doing a very similar converstion to, except its already configured for I/O (old OMC Stringer) and I'm strongly considering a 4BT for a power plant...very very interested to see your outcome.

[joeygtech1369]

Awesome boat! Sounds really good... but the engine is painted like a Cat Motor :)