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A question for all the car motor guys
- Thread starter jim
- Start date
A
Anonymous
Guest
I think I'm both a car motor and A/C engine fan. I just love engines.
The BMW symbol ... the round circle with the three 'points' on it represents the propeller on an airplane. The "Red Baron" had a BMW engine in his Fokker tri-plane in the first world war. BMW made first A/C engines, then motorcycles, and later, automobiles.
Ken
The BMW symbol ... the round circle with the three 'points' on it represents the propeller on an airplane. The "Red Baron" had a BMW engine in his Fokker tri-plane in the first world war. BMW made first A/C engines, then motorcycles, and later, automobiles.
Ken
Waterthunder
Well-known member
.I’m sure most of you know the term Hemi is short for hemispherical the reason the term Hemi is used to describe some motors is because they have an Hemispherical combustion chamber. Believe it or not in naturally aspirated form a Hemi motor is substandard to a quench chamber motor. A Hemi is only superior with a blower or turbo but weak in a none forced induction motor. Here is where it get’s funny the new Dodge Hemi isn’t a Hemi it has two quench areas instead of Hemispherical chamber so it’s not a Hemi just a marketing ploy. You aircraft guy’s and Harley guy’s have the closest combustion chamber to a Hemi, they are actually Hemi’s but without the spark plug located in the middle of the chamber. Because they have a Hemi chamber is some of the reason both motors have a very poor horsepower to cubic inch ratio when naturally aspirated. See a Hemi combustion chamber burns too slow to generate substantial horsepower and torque however this very thing is what makes them the best motor for a blower or turbo. Because when you force feed them the combustion doesn’t occur too fast or violent.
Matt,
Here are the answers in the order that you asked the questions:
Four inline
I did not have an aircraft motor in mind
Don’t read anything Machiavellian into it, it’s just a question
I did not find a motor for an antique airboat that I don’t have or plan to have, that is Big Feather's project.
Actually I think you found one that is older than I had in mind.
Thunder,
Part of the reason that the aircraft engines produce so little power per cubic inch is that they turn so slowly, but you knew that, right?
Jim
Here are the answers in the order that you asked the questions:
Four inline
I did not have an aircraft motor in mind
Don’t read anything Machiavellian into it, it’s just a question
I did not find a motor for an antique airboat that I don’t have or plan to have, that is Big Feather's project.
Actually I think you found one that is older than I had in mind.
Thunder,
Part of the reason that the aircraft engines produce so little power per cubic inch is that they turn so slowly, but you knew that, right?
Jim
A
Anonymous
Guest
Wade, actually they found out after Charlotte one year that he had a little line plumbed into the back of his intake manifold ... they traced it to a little bottle of something called Nitrous Oxide up under the dash. They were all playing with the rules back then.
In my mind, he's the best that ever ran a stock bodied race car. But He said once that there was one that was even better ...
Ken
In my mind, he's the best that ever ran a stock bodied race car. But He said once that there was one that was even better ...
Ken
under pressure
Well-known member
Hey Thunder, Back in the early eighty's Chrysler came out with the infamous K-Car body style using the 2.6Liter Mitsubishi motor, they put a little HEMI emblem on the side of the cars. Those Dodge boy's gotta have something to hold on to!!!! 
A
Anonymous
Guest
Wade, I heard an interview with the King once when he said that the best driver that he'd ever known was David Pearson. He said that Pearson could go faster in a beat up, worn out old race car than anyone he'd ever known.
The legendary Wood Bros. from NC got their start with Pearson in the seat. Back then it was 'run what ya' brung', and the Wood Bros. were running 390ci Fords bored .030 over to make a 406 trying to catch Petty's 426. Ford even offered a 406 Ford Galaxie in 1964 in an effort to make the engine NASCAR legal.
Petty and Pearson were also good friends off the track, and if you watch them in some of the old NASCAR film footage you'll see that they always raced each other, but they looked out for each other too.
Ken
The legendary Wood Bros. from NC got their start with Pearson in the seat. Back then it was 'run what ya' brung', and the Wood Bros. were running 390ci Fords bored .030 over to make a 406 trying to catch Petty's 426. Ford even offered a 406 Ford Galaxie in 1964 in an effort to make the engine NASCAR legal.
Petty and Pearson were also good friends off the track, and if you watch them in some of the old NASCAR film footage you'll see that they always raced each other, but they looked out for each other too.
Ken
A
Anonymous
Guest
Like Thunder said, a hemisperical combustion chamber only works well when the spark plug is located near the center, at the top ...... to allow for flame propagation (ignition) to spread evenly over the top of the piston.
The Offenhauser 4 cylinder engines that dominated Indy(until Ford developed the Indy DOHC V-8) were making over three HP per cubic inch near the end, but that was turbocharged and injected.
Jim, I'll try to answer part of your question. I think the Offys were developed from a Miller Bros. design from the 30's. How'd I do?
Ken
The Offenhauser 4 cylinder engines that dominated Indy(until Ford developed the Indy DOHC V-8) were making over three HP per cubic inch near the end, but that was turbocharged and injected.
Jim, I'll try to answer part of your question. I think the Offys were developed from a Miller Bros. design from the 30's. How'd I do?
Ken
Waterthunder
Well-known member
Back then a Hemi did have an advantage but not as big of one a Petty himself had. Oh yea the last year a HEMI ran in NASCAR was 1970 cylinder head technology has gone ballistic in the last 35 years JUST AS MUCH AS COMPUTER TECHNOLOGY. A hemi chamber couldn’t even qualify in a field today and they would get poor mileage and make substantial less power. Think about that’s why nobody runs a HEMI head now if it was better Ford and Chevy would make them so they could run them in Nextel Cup. Off the subject but Pearson, Earnhardt and Cale Yarborough were all better drivers than Petty. If you go back and read the line up when Petty won most of his championships in most cases he was or only a few other drivers made every race it was a time of privateers. In the beginning Petty was really the only guy with factory backing. Can you imagine if a driver and car didn’t make a race now he would automatically be out of contention for the Championship. Dodge should get credit for his victories as much as him and for factory backed cars in the early day’s. Just like the Dodge Ram Chargers that ran super Stock they killed everybody in NHRA because Dodge backed them. Hell the Daytona Super Bird was deemed illegal by NASCAR after one season because it had such a Massive advantage over the Fords and Chevy’s. Nascsar even made the SuperBirds run small blocks and they still walked away from the Big Blocks at the super speedways. Anyway if Pettry ran a IROC series against Earnhardt and Person and Yarborough he would have been lapped. Like I stated earlier I am a closet Dodge guy and Dodge deserves more of the credit for Petty’s championships than he does with their backing and Hemis and other distinct advantages Petty was shooting fish in a barrel.
Waterthunder
Well-known member
(When racing was racing and the best motors and cars won. Now Nascar would make these guy's run a wing the size of a billboard so the Fords and Chevy's could keep up.) The last line pretty much say's it all.
In the spring of 1962, Chrysler engineering introduced an all out effort with the "short ram" 413 cubic inch V-8 engine. Right out of the box, the light weight Plymouth and Dodge cars absolutely dominated drag racing efforts. As was the usual for Chrysler engineering in that time, the Super Stock 413 had more than been built to be rugged and reliable.
Over the spring and into the summer, well into the fall of 1962, Dodge and Plymouth stock cars terrorized drag racing tracks all over the country. Plymouth made the most inroads. In July 1962, a young kid out of Oakland, California set the stock car world on its ear. He accomplished what no one thought could be done up to that time. He posted a record of under 12 seconds for a stock car in the 1/4 mile. His elapsed time stood at 11.93 seconds with a speed of 118.57 miles an hour. The '62 Plymouth was ugly, but it sure moved out! Townsend was elated. He called his engineers and ordered to start building something for Richard Petty "to whip the ass off Ford!"
In the spring of 1962, Chrysler engineering introduced an all out effort with the "short ram" 413 cubic inch V-8 engine. Right out of the box, the light weight Plymouth and Dodge cars absolutely dominated drag racing efforts. As was the usual for Chrysler engineering in that time, the Super Stock 413 had more than been built to be rugged and reliable.
Over the spring and into the summer, well into the fall of 1962, Dodge and Plymouth stock cars terrorized drag racing tracks all over the country. Plymouth made the most inroads. In July 1962, a young kid out of Oakland, California set the stock car world on its ear. He accomplished what no one thought could be done up to that time. He posted a record of under 12 seconds for a stock car in the 1/4 mile. His elapsed time stood at 11.93 seconds with a speed of 118.57 miles an hour. The '62 Plymouth was ugly, but it sure moved out! Townsend was elated. He called his engineers and ordered to start building something for Richard Petty "to whip the ass off Ford!"
There was plenty of politics back then too. Ford engines were banned, Chevy engines were banned, Hemi's were banned, car designs were banned some manufacturers were favored, it was a big mess and all driven by $$$. Some engines were cheaters, some cars were cheaters etc. The one thing that shines through in that article to me is that NASCAR was political and vindictive from day one.
The best did not necessarily win. The best that France allowed to race usually won.
Jim
The best did not necessarily win. The best that France allowed to race usually won.
Jim