Why havent they marinized any dual overhead cam motors???
05-29-2009, 08:18 PM
#12
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05-29-2009, 09:44 PM
#14
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johnny g,
Let's go back to basics, the thing you call "horsepower" is really "rotational horsepower" and it is strictly a mathamatical formula based on the speed (rpm) at which the engine/motor can exert a twisting force (torque): HP = torque X RPM / 5252
You can't measure horsepower it does not exist you can only measure rpm & torque.
Look at a big truck and the low gears they have to get the truck moving - the higher (numerically) the gear ratio the more torque it will exert.
take 100 hp at 2,000 rpm and the same 100 hp at 1,000 rpm, the 1,000 rpm hp has twice the torque as the 2,000 rpm same 100 hp: torque = 5252 X HP / RPM
Let's go back to basics, the thing you call "horsepower" is really "rotational horsepower" and it is strictly a mathamatical formula based on the speed (rpm) at which the engine/motor can exert a twisting force (torque): HP = torque X RPM / 5252
You can't measure horsepower it does not exist you can only measure rpm & torque.
Look at a big truck and the low gears they have to get the truck moving - the higher (numerically) the gear ratio the more torque it will exert.
take 100 hp at 2,000 rpm and the same 100 hp at 1,000 rpm, the 1,000 rpm hp has twice the torque as the 2,000 rpm same 100 hp: torque = 5252 X HP / RPM
05-29-2009, 09:53 PM
#15
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johnny g,
Let's go back to basics, the thing you call "horsepower" is really "rotational horsepower" and it is strictly a mathamatical formula based on the speed (rpm) at which the engine/motor can exert a twisting force (torque): HP = torque X RPM / 5252
You can't measure horsepower it does not exist you can only measure rpm & torque.
Look at a big truck and the low gears they have to get the truck moving - the higher (numerically) the gear ratio the more torque it will exert.
take 100 hp at 2,000 rpm and the same 100 hp at 1,000 rpm, the 1,000 rpm hp has twice the torque as the 2,000 rpm same 100 hp: torque = 5252 X HP / RPM
Let's go back to basics, the thing you call "horsepower" is really "rotational horsepower" and it is strictly a mathamatical formula based on the speed (rpm) at which the engine/motor can exert a twisting force (torque): HP = torque X RPM / 5252
You can't measure horsepower it does not exist you can only measure rpm & torque.
Look at a big truck and the low gears they have to get the truck moving - the higher (numerically) the gear ratio the more torque it will exert.
take 100 hp at 2,000 rpm and the same 100 hp at 1,000 rpm, the 1,000 rpm hp has twice the torque as the 2,000 rpm same 100 hp: torque = 5252 X HP / RPM
Exactly! So hp can be manipulated through gearing to increase torque? If a high horsepower engine is run at optimum peak hp why couldnt it be geared to provide requested torque? I`ve seen VW bugs pop wheelies.
05-29-2009, 10:20 PM
#16
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05-29-2009, 11:08 PM
#17
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johnny g,
That's not a new concept, it called a multi-speed tranmissions and between modified turbohydro's, Lenco's, Weismann & ZF they have been in boats for years!
Why is it not done more - pretty simple answer.
Take some proven big cubes from a cheap GM base product and attach a sterndrive that just has Fwd-N-Rev built in and you can make a boat go 90 mph - why would you want to do anything else?
That's not a new concept, it called a multi-speed tranmissions and between modified turbohydro's, Lenco's, Weismann & ZF they have been in boats for years!
Why is it not done more - pretty simple answer.
Take some proven big cubes from a cheap GM base product and attach a sterndrive that just has Fwd-N-Rev built in and you can make a boat go 90 mph - why would you want to do anything else?
05-29-2009, 11:25 PM
#18
Registered
The ilmors a 2 valve cam in block- not dohc.
Its a relatively small cubic inch deal - 505CI/8.3L 700HP 650LB torque @ 4500 (I think) 6300RPM redline
Its actually a lot like a mopar 360 with 2 more cylinders on it.
Well there is a bit more- Add an aluminum block designed by Lamborghini, closed lifter galleys, a relatively great set of heads, ultra sophisticated engine management, closed cooling, and you get about 84 HP per litre with no blower.
Idles like a kitten. Its light. Its a smooth as a turbine
It gets 2.4MPG in my boat
A DOHC Honda S2000 engine gets about 120HP litre.! <-0- torque though>
Now I wonder what a 6-9L version of that honda would be like????
Uncle Dave
05-30-2009, 07:24 AM
#19
Registered
johnny g,
That's not a new concept, it called a multi-speed tranmissions and between modified turbohydro's, Lenco's, Weismann & ZF they have been in boats for years!
Why is it not done more - pretty simple answer.
Take some proven big cubes from a cheap GM base product and attach a sterndrive that just has Fwd-N-Rev built in and you can make a boat go 90 mph - why would you want to do anything else?
That's not a new concept, it called a multi-speed tranmissions and between modified turbohydro's, Lenco's, Weismann & ZF they have been in boats for years!
Why is it not done more - pretty simple answer.
Take some proven big cubes from a cheap GM base product and attach a sterndrive that just has Fwd-N-Rev built in and you can make a boat go 90 mph - why would you want to do anything else?
