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Topic Review (Newest First)
05-24-2020 12:33 PM
BuzzLOL
Quote:
Originally Posted by MARTINSR View Post
But wouldn't one drag down the other if one has less power?

Brian
Each motor just contributes to the combo what power it can... my main concern would be all the torque going through that rear most crank throw...
05-24-2020 10:39 AM
MARTINSR
Quote:
Originally Posted by enjenjo View Post
If you want to talk about odd couples, in outboard boat racing some years back they would couple an outboard two cycle motor to a Chrysler Hemi inside the boat. It was eventually outlawed, but by then outboard motors were making a lot more horsepower.
That is as odd as it gets!

Brian
05-23-2020 10:54 PM
enjenjo
Quote:
Originally Posted by MARTINSR View Post
WOW, that is amazing interesting! Being I am not a motor guy at all, I appreciate that explanation that makes total common sense!

Brian
If you want to talk about odd couples, in outboard boat racing some years back they would couple an outboard two cycle motor to a Chrysler Hemi inside the boat. It was eventually outlawed, but by then outboard motors were making a lot more horsepower.
05-23-2020 02:17 PM
harposrepair The most common API Service rating printed on motor oil containers is currently SN, but some oil bottles are labelled "SN Plus." What does "SN Plus" mean?
A. SN Plus and "Dexos Gen 2" labelled oils are formulated to help prevent low-speed pre-ignition (LSPI); a new type of engine knock that can occur in direct-injection turbocharged engines.


B. SN Plus oil includes additives designed to resist acid formation in hybrid vehicle engines that may not heat up adequately because they often run for only short intervals.


C. SN Plus oil contains at least 20% re-refined motor oil. Re-refined oil is used oil that goes through a refining process similar to that for crude oil to remove all contaminants.
12-25-2019 04:42 PM
idrivejunk When I was a curious kid at tractor pulls, Dad explained it as, in the case of two V8s...

timing it as a V16. Which is oversimplified but prompts the "A-ha!" in the mind.


Speaking of V8 trivia, I stumbled onto some intriguing previously unknown to me prewar Ford trivia yesterday, about the engine idea Henry had in mind when they set out to design an eight cylinder Model B. Tended to break spark plugs though.
12-25-2019 01:18 PM
MARTINSR
Quote:
Originally Posted by techinspector1 View Post
The idea is to stretch out the firing order so that you have a cylinder firing every 45 degrees instead of every 90 degrees. Motor #1 would fire at 0-90-180-270-360-450-540 and 630. Motor #2 would fire at 45-135-225-315-405-495-585 and 675. This way, it really wouldn't matter how much power was being applied to the crank by either motor because in between firing impulses with one motor, zero is being applied to the crank. This way, with staggering the firing orders, SOME power is being applied to the crank every 45 degrees instead of every 90 degrees, no matter if the power is equal or unequal.........

OK Tony, your turn to try to unravel it..........
WOW, that is amazing interesting! Being I am not a motor guy at all, I appreciate that explanation that makes total common sense!

Brian
12-25-2019 12:20 PM
boothboy
Quote:
Originally Posted by techinspector1 View Post
The idea is to stretch out the firing order so that you have a cylinder firing every 45 degrees instead of every 90 degrees. Motor #1 would fire at 0-90-180-270-360-450-540 and 630. Motor #2 would fire at 45-135-225-315-405-495-585 and 675. This way, it really wouldn't matter how much power was being applied to the crank by either motor because in between firing impulses with one motor, zero is being applied to the crank. This way, with staggering the firing orders, SOME power is being applied to the crank every 45 degrees instead of every 90 degrees, no matter if the power is equal or unequal.........

OK Tony, your turn to try to unravel it..........
Thank goodness you answered because I din't know the answer.

BB
12-25-2019 11:55 AM
techinspector1
Quote:
Originally Posted by MARTINSR View Post
But wouldn't one drag down the other if one has less power? Brian
The idea is to stretch out the firing order so that you have a cylinder firing every 45 degrees instead of every 90 degrees. Motor #1 would fire at 0-90-180-270-360-450-540 and 630. Motor #2 would fire at 45-135-225-315-405-495-585 and 675. This way, it really wouldn't matter how much power was being applied to the crank by either motor because in between firing impulses with one motor, zero is being applied to the crank. This way, with staggering the firing orders, SOME power is being applied to the crank every 45 degrees instead of every 90 degrees, no matter if the power is equal or unequal.........

OK Tony, your turn to try to unravel it..........
12-25-2019 11:17 AM
MARTINSR
Quote:
Originally Posted by boothboy View Post
I'm not sure how the Odd Couple was coupled but here are examples of how some of them did it. Both engines facing the same direction. Two identical chain sprocket were obtained and one was welded to a harmonic balancer snout, The other was welded to a flange that was made to bolt to the rear crank flange. When installed on the engines sprockets facing each other, a double roller chain was wrapped around them and connected with a master key.
On side by side twins the flywheels intermeshed.
Someone asked if the front engine powered the rear engine and then uncoupled. No The idea was to make more horsepower.

BB
But wouldn't one drag down the other if one has less power?

Brian
12-24-2019 04:50 PM
boothboy I'm not sure how the Odd Couple was coupled but here are examples of how some of them did it. Both engines facing the same direction. Two identical chain sprocket were obtained and one was welded to a harmonic balancer snout, The other was welded to a flange that was made to bolt to the rear crank flange. When installed on the engines sprockets facing each other, a double roller chain was wrapped around them and connected with a master key.
On side by side twins the flywheels intermeshed.
Someone asked if the front engine powered the rear engine and then uncoupled. No The idea was to make more horsepower.

BB
12-24-2019 02:57 PM
idrivejunk Are those crank flange to crank flange?
12-24-2019 01:46 PM
boothboy
Quote:
Originally Posted by Too Many Projects View Post
It's only recognizable, if one recognizes it...

I recall hearing about that particular combination years ago, but had no idea who built, or drove it. After a little sleuthing, I came up with Matsuda as the cars owner, but not much else, other than you tube vids. Still not sure why the odd combination of engines made sense.
Where did you find your info?

BB
12-24-2019 01:33 PM
idrivejunk
Quote:
Originally Posted by Too Many Projects View Post
Probably performs that function too...

I do wonder if it uncouples at a certain rpm and lets the big hemi wind up on it's own...
That has to be like the fire-breathing grizzly bear of dragster types and theres no doubt some black magic made it all work on the strip. Pure evil and wicked. Aren't there pull tractors or something that use a seperate engine to spool big turbos?

That twin engined GTP had a 500 horse up front and 800 out back. Said he launches on the fronty and lays in the big gun with an ATV thumb throttle. But now if the dragsters are using... what... a transfer case turned backwards and putting it all on one axle, thats gotta be some kind of failure prone freak show driveline setup you sit on, right?
12-24-2019 09:52 AM
boothboy
Quote:
Originally Posted by MARTINSR View Post
I had no idea it existed, but here it is. I have never been able to grasp how you can hook two different motors like that, I just don't get it. How can one produce the same power if it's being dragged down by another? Be it different torque or what ever, I don't get how different motors can be hooked together that way and work very well.

Brian

Brian where were you when the Odd Coupe raced at Fremont? Probably doing wheelies on your Schwin!

BB
12-24-2019 09:50 AM
boothboy Yes that's Ken's Automotive The Odd Couple. Not the first to use that engine combination nor the last. The dragster was fast and very competitive winning the Top Gas Eliminator at the 1971 Nationals in Pomona. Different engine combination were not limited to Chevy and Chrysler. Buick and Olsd, Fords and Chrysler Olds and CeSotos . you name it. Multiple engine guys went with the theory "If one was good two was better!" I believe the theory about using different engines was one would rev faster helping the bigger displacement engine get up to speed or power faster.

BB

Want to see some neat stuff? This site shows how it all started.

DRAGSTERS - GEORGE KLASS REMEMBERS...
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