why 3.0L 4cyl when you don't see that in automobiles?

[rodbolt]

Re: why 3.0L 4cyl when you don't see that in automobiles?

if strickly engine V or inline design nesesitated a balance shaft most all engines would have them, the old odd fire 3.8 buick did not and it was quite smoth, a pain to grind the crank but other than that smooth. my old mitsubishi 4 banger had a balance haft and so does the F150 yamaha 4 stroke and the F25 merc motor used by yamaha has a balance piston. I was amazed no one ever tried to marinize the old 258 AMC, in the EFI version its very smooth and reliable and was very plentiful but tall and long so other than a jeep it fell by the wayside. not all 90* v6's or V8s had a balance shaft, however some do. the old 305CID GMC V6 was about a smooth an idling engine I ever played with. if ya really wanna see smooth look at some of the old flat head straight 8's.<br /> I had a 65 olds dynamic 88 with a 425CID that I could balance cigarretes on the air cleaner at an ingear idle of about 500 RPM, used to win beers at a bar proving it . <br /><br /> aggiedave<br /> try googling coventry climax.

 

[Weirdwalt]

Re: why 3.0L 4cyl when you don't see that in automobiles?

I'll never tire of that Tilliam.

 

[woodrat]

Re: why 3.0L 4cyl when you don't see that in automobiles?

I had one of those Olds 425s too. What a great engine! it was in a 67 olds 98, with all the crazy luxury options. It was my first car, and cost me $200. Can't imagine even putting the fuel in it now...<br /><br />Which brings me to the questions i want to ask about inboard gas engines in boats. I am considering selling my 16' aluminum Valco with a 60 hp Yamaha 2 stroke, and replacing it with an older 18-20' glass inboard jobber. I love the look of my valco, but it is small and not a deep enough v bottom to go where I usually end up going, ie rougher water. And it doesn't really have enough freeboard for that rough water either. I have been finding a lot of fixer inboard glass boats in the 18-20' range for pretty darn cheap, but I have no idea what they might cost to run or maintain compared to the outboard. Am i likely to see a huge cost in gas if I switch? I am looking primarily at inline 6 chevy setups, since I think that is one of the most common, reliable and easy to work on engines ever made ( aside from the amazing chrysler slant six). I also am finding a few 125 hp chevy fours, but I am worried that parts might not be so easy to get as a chevy truck engine. i even have a great running 292 chev 6 just sitting around in an ancient truck that I could use if I had to. <br /><br />So what's the deal with the inboard/outboard setups? Will I be sorry i left the expensive to get parts for, but powerful yamaha behind?<br /><br />Wasn't that Coventry Climax engine a fire pump engine first?

 

[rodbolt]

Re: why 3.0L 4cyl when you don't see that in automobiles?

yep it was a marine fire pump engine and one of the desighn specs was no loat speed due to the occasional roll of the fire boat uncovering the pump intake, come to find out it would turn 10K all day.<br /> the parts for the inline six are getting scarce and the manifolds are outrageous, try a later v6,v8 with alpha or alpha gen II drive and freshwater cool it to include the manifolds and run cast stainless risers, its a bullet proof cooling system then, I have some 5.7 motors with over 10 years on the original parts.

 

[woodrat]

Re: why 3.0L 4cyl when you don't see that in automobiles?

trying to stay away from v-8's for fuel economy reasons. And I've always been kind of leery of v-6's because the automotive world is full of so many badly designed ones.<br /><br />Do the manifolds on those older sixes and fours warp or crack or what? Are the fours less likely to?<br /><br />Thanks

 

[Lou C]

Re: why 3.0L 4cyl when you don't see that in automobiles?

The 4.3 Chevy V-6s are actually pretty good, a little rougher than a V-8 in the non balance shaft version but they seem to last as long as any other Chev small block as long as the maintenance is kept up. I have an original never rebuilt one, raw water cooled, 17 years old! But only about 5 years of that is salt water usage.<br />The main issue with I/O set ups is you have to keep up on the maintenance, otherwise it can be a real nightmare. The engines are simple and easy to fix if you can get at stuff in the bilge, the outdrives can be problematical if they are not adjusted and maintained right.

 

[tommays]

Re: why 3.0L 4cyl when you don't see that in automobiles?

i have a 4.3 running a water chiller at 1800 RPM with and avg load of about 50 HP<br /><br />12 hours a day 6 days a week X 8 years its at 27000 hours<br /><br />pretty good for a crappy american motor <br /><br />it has a 20 gallon oil supply that gets changed twice a year plain old dino oil<br /><br />it sits in the blazeing sun in the summer and 6 ft snow drifts in the winter <br /><br />its going to die in the spring pretty likely buts its really hard to say anying thing bad about it<br /><br />tommays