Outboard Top Speed World Record 200 mph Attempt

[Instigator]

Though not an outboard there is some good info on this little vid with legendary unlimited pilot Dave Villwock . watch this video regarding record attempts etc . Also just some great footage !

Awesome video Tom. Never seen it before.
He was one lucky SOB to lose the rudder, prop and strut on a kilo pass and survive!
The crash footage really gives an idea of how violent a crash at speed can be.

[Spectre Powerboats]

1) Anyone got a covered trailer coming from Phoenix, AZ to Ohio to haul first boat in about 3 weeks? Let me know cost. 2) Anyone seen a Mercury mid shorter than 12" new style? 3) Who is the best for re-splining drive shafts (not big on cutting and welding them)? Thanks in advance

[kimswang]

1) Anyone got a covered trailer coming from Phoenix, AZ to Ohio to haul first boat in about 3 weeks? Let me know cost. 2) Anyone seen a Mercury mid shorter than 12" new style? 3) Who is the best for re-splining drive shafts (not big on cutting and welding them)? Thanks in advance

Kevin at Bobs Machine did a fantastic job with my driveshafts.

[afr]

https://www.facebook.com/pages/Victo...37955902952978

[Spectre Powerboats]

I have been having some good info. for the OMC stuff. Found good 6"mid, good gear cases and some big hp V-8's. I have run 4.0's on a checkmate and a velocity, but never in a race applications. Have always been Mercury, but change may be good. I just need to make a decision and go with it. Question for you OMC guys. I was told today that they have seen same horsepower with a carb V-8 as a efi V-8. Believable because at wide open throttle the motor only knows air and fuel.

[powerabout]

I have been having some good info. for the OMC stuff. Found good 6"mid, good gear cases and some big hp V-8's. I have run 4.0's on a checkmate and a velocity, but never in a race applications. Have always been Mercury, but change may be good. I just need to make a decision and go with it. Question for you OMC guys. I was told today that they have seen same horsepower with a carb V-8 as a efi V-8. Believable because at wide open throttle the motor only knows air and fuel.

thats the story with any engine at WOT
( less the fuel particle size which may or may not make a difference)

[Instigator]

I was told today that they have seen same horsepower with a carb V-8 as a efi V-8. Believable because at wide open throttle the motor only knows air and fuel.

I think the carby F-1 V-8's were rate at 380 - 390 and the EFI's were @ 400. All dyno #'s.
The motor doesn't care where it gets it's fuel/air from. EFI is way more tractable and infinitely tunable where carby's aren't.
Keep in mind too (you probably already know this) the race V-8's share zero w/the recreational motors. Total clean sheet of paper and one of the few things OMC did right. Apples to oranges.
As others have said, when your going to need the level power you will, why start w/something modified to the gills to even get you started?

Rumors are Dave Bush was making 557 HP's, on the motor, w/his V-6 OMC in Pro Gas tune. If you multiply that # X 1.33 to simulate the addition of 2 cylinders, you're at 741. Now open the bottle.

Heres a link to an ad for an ancient, carbureted offshore V-8. Study the #'s then find anything else that starts anywhere close to that.
One thing to note in the ad, pump gas ; )






Here is some of Montys handy work w/a V-8. I believe this one started as a fish motor. I think they are now able to end up w/a 5.0 liter motor which I don't think they can do w/the race block.
There's an old saying that says, "if you need a big engine, why start w/a small one?"



https://www.youtube.com/watch?v=QaBbSKOfYQ8

[powerabout]

wot ya saying?
I'll bet the coils were the same
lol
Cheers

[Instigator]

Some eye candy for the faithful.

Learned three things w/my little visit to Montys shop today.

#1. I dind't buy enough epoxy for my current project.

#2. I will, still build a V-8

#3. Still can't get my micrometers past his metal detector!

V-8 w/Montys magic including his big bore sleeves. W/stock crank, this motor is now 264 cu.in's.
That's 4.4 liters for you keeping track at home.

Enjoy....





Didn't think they made a V-8 E-Tec?? They didn't. Try and tell Monty that
Between the block and the front 1/2, you/we can't even imagine the amount of time the guys has in this thing.

Kim S, I saw yours in line.

[RBT]

I can't figure out the v8 thing as the pulse tuning on a v6 is MUCH better, the hp a v6 makes cannot be converted in a linear fashion to a v8.
For the kilo, I would have concerns with a big bore motor disappating heat for kilo run.
I still think a little merc could do it. I would also use a fabricated mid, nothing existing is ideal, none are fixed, all are a lot heavier than required.

[Spectre Powerboats]

Who has the closest dyno to Ohio? Needs to be capable of at least 700 plus hp. for OMC.

[StratosVT]

Who has the closest dyno to Ohio? Needs to be capable of at least 700 plus hp. for OMC.

Probably doesn't exist, but as has been said many many many times in this thread, Dave Bush or Monty is who you need to ask! There is no one here on S&F who has dealt with that kind of horsepower so you need to pick up the phone to get the help you want.

[Instigator]

There is no one here on S&F who has dealt with that kind of horsepower so you need to pick up the phone to get the help you want.

Bingo.
Great advice Harry. Be easy to spend a ton of money figuring out who the arm chair quarter backs are and who walks the walk.

Only two dynos I know, capable of doing the deed are both out west. Montys dyno is in his head
Everyone on the planet combined has probably built less V-8's than he has.

Been in Fla 7 yrs now and this is the 1st time I wish I was back in Ohio

[Instigator]

Had a PM from a member asking about the epoxy on Montys V-8 block. for anyone else curious, here is what I replied:

Montys porting is so radical that it penetrates the stock block. He builds up the areas w/welding and epoxy to have an area to grind and to re-seal it.

[ultrafast]

That one gonna run. Lotsa air in lotsa air out!