2 stroke V8?

Drag race motor? Diaphragm pumping carbs? No oil pressure? Will never work? Now I really want to do it....

Which would be better? Small 6 cylinder or a big 4 cylinder.
 
Actually, they work very well. Couple-of-hundred lbs...300+ hp.

These things got adapted from midgets for desert racing! (Of course, not with the blower! LOL!)

 
Yeah, the spidertrax bug had one.

I know a guy with boats scattered around his property. Might visit him tomorrow and see if I can bring something home to look at. Need to see what it would take to attach a transmission.
 
Yea, Alonso did to.

Another suggestion on the 2 stroke idea.

Search down the work Chrysler did, I think, in the 80s and 90s on 2 stroke technology. They were trying to develop larger, production two stroke power plants. But if I recall, they never could get the emissions or the mileage...I dont remember which!
 
ol'Jeeps said:
Yea, Alonso did to.

Another suggestion on the 2 stroke idea.

Search down the work Chrysler did, I think, in the 80s and 90s on 2 stroke technology. They were trying to develop larger, production two stroke power plants. But if I recall, they never could get the emissions or the mileage...I dont remember which!
Click to expand...

Most likely emissions. That has been the biggest problem with 2-strokes since the government started pushing clean air.
 
That's what I was thinking.... Wonder how many boats are out there with good engines, that are sitting because of other problems. Still trying to figure out the major issues with using one. Not totally convinced yet. Would be terrible to blow that bitch into a million pieces on the first ride.
 
1) I hope everyone keeps telling David he cant do this. Cause I wanna se it :flipoff2:

2) Aside from all the stuff you have already figured...Cooling I think is going to be an issue. Outboard draw water for cooling and return it..my 150hp V6 will hurt your hand sucking 80 degree lake water...its going to be tough to get a radiator to get the coolant that low. Plus on my boat I replace the water pump EVERY year (roughly 30-40 hours) because Ive had more than 1 friend have a water pump fail at speed and the motor is trashed before you can cut it off.

They are low on torque, obviously and Id be concerned with how much stress the output shaft can take. A prop motor has relatively low resistance as compared to a gear box and I suspect shock loads would end your crank... My 6 carbs are finicky as hell to stay "link and sync'ed" cant imagine how bad they be off road in a rough environment.

Power packs are $100+/pop and not real hardy either.

Again I am NOT trying to talk you out of it, just giving some things to think of./

Oh yeah...fuel mileage. again bass boast 150hp outboard and a heavy foot. I burn roughly 30 gallons a hour of run time and ~.5 gallon of outboard mix oil at $25/gal. Thats staying in the 55-5800 rpm range
 
If I had a money making machine, I would start the build without question.

I'm not going to stop asking questions yet, but looks like I need to start researching other options.
 
David G 4x4 said:
That's what I was thinking.... Wonder how many boats are out there with good engines, that are sitting because of other problems. Still trying to figure out the major issues with using one. Not totally convinced yet. Would be terrible to blow that bitch into a million pieces on the first ride.
Click to expand...


I'd say you've clearly never owned a boat, let alone one with a two stroke outboard motor...

I don't think cooling would be a problem at all, power is power and heat is heat. Typical outboard water pump is tiny and pumped through a restriction so as to keep the engine warm enough to operate--even more critical on a two stroke. Run an electric water pump and decent radiator. Big downsides are there are no provisions at all for accessories, parts are way overpriced, can't find parts at the autozone in Harlan, even an old 150+hp with a busted lower unit that runs is going to be $$ and you're still talking only 150hp at a very high and small rpm window, outboard motors are tuned for making power and cruising at 5k rpm.
I could see this happening maybe if you worked at a boat shop and had knowledge of them and a few parts laying around for free, as it is--get a 2 stroke buggy running and driving, dig this post up, and I will send you $10. :flipoff2:
 
Dually noted.... I'll take the $10 in quarters, and shipped overnight with 24 beers.

Rpm window is fine. Tired of my foot getting sore, reckon I'll weld the gas pedal to the floor.... :flipoff2:
 
4.8 LS motor with a turbo? They're short stroke motors and the bottom ends can take some stupid abuse and make some awesome power. With nothing more than rod bolts and supporting valvetrain mods, I've seen some turn 8000-8500. I bet you can't do it :flipoff2:
 
I'm close to 90% sure I can make this work with my special configuration. The carb orientation and fuel setup are the only things I don't completely understand yet.
 
Thanks for the input y'all....
I enjoy and consider all of it,
good or bad - no joke.... :beer:

I really do appreciate it, because I learned a lot.
I already expressed how much I hate motors, but I'm not motor dumb. This is truly something I am interested in learning more about, and I am digging everyday.

Hope the information flow hasn't stopped.
Would be awesome to hear more.


I know it's hard to have faith in something that you've never seen before, and I have no doubt everyone who has read this thread thinks I'm full of shit. Maybe over flowing with it, but trust me, it's cool.... I deal with it everyday.

Got some things going on that are more important than my Pecos Bill buggy, and I don't know exactly when I can start on it, but I'm here to tell you that I am all over this thing like white on rice! It is going to be one wild ass machine....

Bottom line is I am going to push any engine past it's limits. Going to find a deal on a commonly used outboard engine and when this setup is complete? It will ensure long lasting operation of a small, compact, and heavy hitting rotating assembly that will perform at any incline as long as a rev limiter is in order.

99% chance - The Pecos Bill hill killer will have a 2 stroke outboard power house and 2 seats....

Muah ha ha ha
Challenge Accepted :eek: o_O :alien: :flipoff2:
 
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I have a yamaha ox66 250 hp fuel injected long block that you can have for $300. I have a pair of these on my boat that will out perform any 4 stroke, theyre much lighter, hardly smoke, redline at about 5800rpm, dont fowl plugs...pretty much defunct all the negative 2 stroke myths. I run lots of boats and having everything else the same running a 2 stroke engine is like having twice the displacement as compared to the 4 strokes... acceleration is incredible with a big 2 stroke gobs of torque even at low rpm. The only thing a 4 stroke has over my 2 stroke is a smoother idle and a marginal increase in fuel economy, but this is partially offset by the weight savings you get with a 2 stroke. I even have one of those indestructable front toyota axles i can make you a package deal on. Pm me if youre interested.

Dave
 
I would look for a direct injection/ fuel injection engine. That would solve the fuel issue when you change it to a horizontal position. The direct injection 2 stroke engines are equal in efficiency to a 4 stroke. I don't see why this can't be a good option for a extremely light weight high power power plant. The only accessory I see being a problem would be the power steering pump.
 
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