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  #16 (permalink)  
Old 06-18-2004, 01:15 AM
BOBCRMAN@aol.com's Avatar
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You say that you have been building engines since you were a kid. Your spec sheet says you are 23! You been building engines for for how many years? Some people on this Forum started building engines in the sixties. Lots of strange events and sites happen in that many years of commercially rebuilding engines.
The bent crank thing came from the days of the straight eight engines. Also LARGE commercial powerplants. Crank grinders all hang their ground cranks from the flywheel flange.

Roller rockers do roll if set up properly. Look how GM has gone to roller rockers in many of their production engines. Less friction=more usable power.

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  #17 (permalink)  
Old 06-18-2004, 01:35 AM
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I like Bob...not from just this post, but other posts as well...
Where should we meet up at Woodward....?
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  #18 (permalink)  
Old 06-18-2004, 07:40 AM
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or Jeff, or Doc, or...
 

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Well,,,,,,,,My dad's gonna beat up your dad !

And I'm tellin!!!


Guys, take a step back , pop the top on the beer and chill out a bit. No sense going to a messageboard to get worked up. Remember? This is fun?
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  #19 (permalink)  
Old 06-18-2004, 07:52 AM
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Sandflea. I usually hang around the northern end of Woodward just south of Pontiac, in the Hills area, And around the Coney at Square Lake Rd. Not real crowded and good traffic. I hope to have my 60 Mercedes-Benz "Ponton" done by then. Rasberry and Grey.
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  #20 (permalink)  
Old 06-18-2004, 09:12 AM
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Just a note on heat transfer - the term 'convection' refers to heat being transferred by the movement of a fluid, e.g., water in an engine block flowing past hotter, rough surface in the block and past cooler, smooth tube surface in a radiator, or air flowing past the hot Chevy orange paint of the engine block or past the black paint on a radiator core. Note I mentioned the surface condition of the solid and the type of fluid and not the material the solid surfaces are made of. That is because convective heat transfer is solely dependent on the fluid and surface properties and totally independent of the material composition of the solid.

What many of the posts are describing is 'conductive' heat transfer which is totally dependent on the material. Copper conducts heat 70% better than aluminum which is why it is the preferred radiator material, all other things being equal. Aluminum is better than brass by about the same margin. Aluminum is lighter and looks purtier so some heat transfer is sacrificed for those properties on some radiator applications. Iron has only 1/3 the heat transfer ability of aluminum which is sometimes good (easier for water to haul heat away from hot cylinders) and some times bad (sucks heat out of the combustion chamber, lowering engine thermal efficiency). The best ordinary metallic thermal conductors are (in decreasing order) silver, copper, gold, aluminum, beryllium, and tungsten. Amazingly best thermal conductor of all by several times is diamond! Diamond is twice as conductive as silver.

The 'convective' heat transfer between air and the engine is insignificant, especially if the engine is painted or polished, only on the order of a few percent in the best case. The heat generated by gasoline burned in the engine goes mainly to generating power (~25%), out the radiator due convective heat transfer in the water (~30%) and connectively out the hot exhaust (~45%). The conductive properties of the material that the engine is made from is a very small fraction of the cooling equation and can usually be ignored. Air flow in the radiator and coolant flow are the 800# gorillas here.
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  #21 (permalink)  
Old 06-18-2004, 09:39 AM
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Man I hate when threads turn out like this. Oh well, you win some, you lose some.

BTW my comment about building since I was a pup in my grandpa's garage simply means that I've picked up some useful info over the last few years, and I enjoy the hobby. Probably most of my posts are still question oriented, I'm not pretending anything here, but gimme a break; I make a few simple comments and somebody decides to take it to a personal level with me for really no justifiable reason? That would get anybody going, veteran builder or no.

Thanks for the rest of your posts peeps-

K
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  #22 (permalink)  
Old 06-18-2004, 02:28 PM
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Killer, it is helpful to list a reference to the info when you start a thread like this. Just hanging seemingly controversial 'facts' out there like that is inviting the kibitzers out of the wood work!
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  #23 (permalink)  
Old 06-19-2004, 01:02 AM
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Quote:
Originally posted by BOBCRMAN@aol.com
Sandflea. I usually hang around the northern end of Woodward just south of Pontiac, in the Hills area, And around the Coney at Square Lake Rd. Not real crowded and good traffic. I hope to have my 60 Mercedes-Benz "Ponton" done by then. Rasberry and Grey.
Nicely done...I guess it will be at least you me and Kitkar together that far north....See you then!
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  #24 (permalink)  
Old 06-19-2004, 07:17 AM
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Quote:
Originally posted by BstMech
I took my photos out of my album a while back because I was leaving and fed up with dip*****s like you on here. Don't worry, I'll be sure to put them back in as soon as possible.
Looks like you missed our original photo albums.
Sorry couldn't resist, everyone forgets those old albums are still there.

Old Photo Albums


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  #25 (permalink)  
Old 06-19-2004, 08:55 AM
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lol, and he makes fun of my rides?! Gimme a break!

K
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  #26 (permalink)  
Old 06-19-2004, 09:13 AM
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re alum heads and manifolds other than weight ther bigest advantage is cheap and easy to cast, iron is far tougher when over heated.the different expantion rate makes alm heads on iron blocks more susept to blown head gaskets .
roller rockers ar better even with no needel bearings the round roller pin and roller reduce friction. check the hd diesel world wher they are lite years ahead re high performance. both cat and cummins have had roller cams and rockers for years. plus turboes after coolers compound turdos. ps like your thread except the in fighting is rather childish
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  #27 (permalink)  
Old 06-19-2004, 09:59 AM
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Quote:
Originally posted by killerformula
lol, and he makes fun of my rides?! Gimme a break!

K
I posted the link not so it could be picked on but simply cause it's there. It shows a couple of things.
1. He's been around here for a long time.
2. He isn't a fake and at least has a place to work and does work.

You guys can bicker opinions all you want in this thread but in my opinion from my time here at hotrodders with BstMech he could hold his own in any shop. At seventeen I built my first engine, it was years later before I could trace intermittent misfires with an oscilloscope or diagnose electrical faults for a living. One is completely different from the other. I think it's time to give it a rest.

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  #28 (permalink)  
Old 06-19-2004, 10:06 AM
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off the top of my head, i can't think of a time BstMech has asked for help......

personal or hotrod.

walks like a duck, talks like a duck, quack quack??
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  #29 (permalink)  
Old 06-19-2004, 10:25 AM
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Quote:
Originally posted by crazy larry
off the top of my head, i can't think of a time BstMech has asked for help......

personal or hotrod.

walks like a duck, talks like a duck, quack quack??
You lost me there crazy. Guess I just don't get it.


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  #30 (permalink)  
Old 06-19-2004, 10:26 AM
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live with a ******?

Why?


Tazz


Rat Rods Rule!
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