- Joined
- Jul 14, 2008
- Messages
- 421
Yep. It’s a beast!Will Be a good build,, is that pipe a 67size spp?
JR, some guys center the tanks on the CG so it doesnt change during the race. The only reason I dont is due to the platform is already there for the tanks on a Leecraft and the install easier as the tanks are not in the way of the push rods exit on the rear of the radio box.Thanks a ton guys! Great info.
I have noticed that everyone runs their tunnel fuel tanks in the very back of the boat. Is there any reason they dont center them on the CG like a scale or sport hydro? Seems like putting the thing that changes weight as you drive at the CG would have the least effect on the handling of the boat during the course of a race. Just some things I am thinking about with it.
That lady would have been Mrs Cathy Pruesse....very fast and stable 460... Raced against her a few times....Both my XT 460’s were epoxy glass hulls with no gel coat. They were very light hulls and i had to add a lot of ballast weight to keep them on the water powered by a 45 Rossi River King. Very fast boats that taught me a lot about lift vs mass and driving finesse. It should be interesting to see how the gel coat fiberglass version of the hull handles as much power as that 67 Nova should be able to put out. There was a lady in D4 that was dominant in D tunnel with her Nelson powered XT 460. She had that boat dialed, and she could drive!
That lady would have been Mrs Cathy Pruesse....very fast and stable 460... Raced against her a few times....Both my XT 460’s were epoxy glass hulls with no gel coat. They were very light hulls and i had to add a lot of ballast weight to keep them on the water powered by a 45 Rossi River King. Very fast boats that taught me a lot about lift vs mass and driving finesse. It should be interesting to see how the gel coat fiberglass version of the hull handles as much power as that 67 Nova should be able to put out. There was a lady in D4 that was dominant in D tunnel with her Nelson powered XT 460. She had that boat dialed, and she could drive!
Yes indeed, Cathy Preusse is who I was referring to... and she is entered in the Nitro Nationals.
Ron,JR, some guys center the tanks on the CG so it doesnt change during the race. The only reason I dont is due to the platform is already there for the tanks on a Leecraft and the install easier as the tanks are not in the way of the push rods exit on the rear of the radio box.Thanks a ton guys! Great info.
I have noticed that everyone runs their tunnel fuel tanks in the very back of the boat. Is there any reason they dont center them on the CG like a scale or sport hydro? Seems like putting the thing that changes weight as you drive at the CG would have the least effect on the handling of the boat during the course of a race. Just some things I am thinking about with it.
Ron,JR, some guys center the tanks on the CG so it doesnt change during the race. The only reason I dont is due to the platform is already there for the tanks on a Leecraft and the install easier as the tanks are not in the way of the push rods exit on the rear of the radio box.Thanks a ton guys! Great info.
I have noticed that everyone runs their tunnel fuel tanks in the very back of the boat. Is there any reason they dont center them on the CG like a scale or sport hydro? Seems like putting the thing that changes weight as you drive at the CG would have the least effect on the handling of the boat during the course of a race. Just some things I am thinking about with it.
Yeah, that makes a lot of sense. I think since we are making our own radio boxes, I might play around with where things are positioned a bit. If I cut into the fuel tank platform, is there flotation in the hull? Do you think it will weaken the structure much? I am thinking of just cutting some of the front portion of the platform out and getting the fuel tank down in the hull a bit right at the CG. Also curious about pressure for the fuel system. I know part of why the tanks were high up on that platform is for fuel flow. Does the NR with the tune pipe create a lot more pressure for the fuel system then the old K&B stock exhaust? I would assume so, but I am just guessing on these things.
Jerry,JR,
I have 12 oz and 16 oz fuel tanks that I won't ever use. You and Joe are welcome to them. I can bring thing to the practice day on Saturday.
JD
Okay, thanks Ron. Guess I'll scrap that plan.Ron,JR, some guys center the tanks on the CG so it doesnt change during the race. The only reason I dont is due to the platform is already there for the tanks on a Leecraft and the install easier as the tanks are not in the way of the push rods exit on the rear of the radio box.Thanks a ton guys! Great info.
I have noticed that everyone runs their tunnel fuel tanks in the very back of the boat. Is there any reason they dont center them on the CG like a scale or sport hydro? Seems like putting the thing that changes weight as you drive at the CG would have the least effect on the handling of the boat during the course of a race. Just some things I am thinking about with it.
Yeah, that makes a lot of sense. I think since we are making our own radio boxes, I might play around with where things are positioned a bit. If I cut into the fuel tank platform, is there flotation in the hull? Do you think it will weaken the structure much? I am thinking of just cutting some of the front portion of the platform out and getting the fuel tank down in the hull a bit right at the CG. Also curious about pressure for the fuel system. I know part of why the tanks were high up on that platform is for fuel flow. Does the NR with the tune pipe create a lot more pressure for the fuel system then the old K&B stock exhaust? I would assume so, but I am just guessing on these things.
JR,
Either way the tank needs to be up high due to the inherent fuel feed problems with outboards because of the height of the carb. We add a hopper on top of the main tank to reduce air bubbles and to get the fuel feed closer to the level of the carb. Personally, I would not cut out that area of the tunnel. The FE guys get by with it as they insert a full length radio box and attach to the sides of the top deck and bottom of the radio box to the lower half of the hull and this re-establishes the structural integrity of the hull. Cutting out that area for a tank to clear would weaken the hull strength considerably.
Been there(K&B 67 Outboards both stock and mod), done that, have decided that downsizing to 21 OBs works well. But, it will be interesting to see how the new NV 67 OB performs. At least with a tune pipe it will not be as loud as the stock K&B 67 OBs. That engine was the ultimate "Fuel to Noise Converter."Jerry,JR,
I have 12 oz and 16 oz fuel tanks that I won't ever use. You and Joe are welcome to them. I can bring thing to the practice day on Saturday.
JD
Sounds great! Thanks man.
When we convince you to build a .67 mod, I can give them back...
Jerry,Been there(K&B 67 Outboards both stock and mod), done that, have decided that downsizing to 21 OBs works well. But, it will be interesting to see how the new NV 67 OB performs. At least with a tune pipe it will not be as loud as the stock K&B 67 OBs. That engine was the ultimate "Fuel to Noise Converter."Jerry,JR,
I have 12 oz and 16 oz fuel tanks that I won't ever use. You and Joe are welcome to them. I can bring thing to the practice day on Saturday.
JD
Sounds great! Thanks man.
When we convince you to build a .67 mod, I can give them back...
JD
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