Manufacturer A produces a 4.6 litre V-8, rated 300hp/.320lb/ft . Manufacturer B produces a 4.2 litre V-8 rated 417hp/317lb/ft. How does manufacturer B do this?
2007-08-25 16:35:37 · 7 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Both powerplants are naturally aspirated.
2007-08-25 16:36:46 · update #1
Wink, good question.
Sometimes its not just horsepower its TORQUE that counts
The torque is what pushes you back in your seat. Also better to have the torque thru a broader range. Often horsepower ratings are some times smoke and mirrors with many manufacturers.
Valve train, cylinder head design, type of fuel delivery system, ignition system components, exhaust systems and block designs all play a part.
Example: BMW N-52 engine. 3 liter in line 6 cylinder, 260+hp/255lbs-ft torque, unmodified and naturally aspirated.
Reason: Double vanos valve technology provides precise valve timing at every engine speed and optimizes the amount of air/mixture in the engine.
Magnesium super light engine block.
Valvetronic technology provides variable valve lift control to help the engine breath more easily and efficiently
Superior more precise fuel delivery systems
Electric oil pump reduces energy drain on engine
Peizo electric injectors
Hydro formed stainless exhaust headers
Etc, etc...
All these special components combine to deliver not only high horsepower but horsepower thru a much broader rpm range starting at a lower RPMs.
Naturally these engines are expensive to engineer, develop and build. Basically its ALL ABOUT THE MONEY.
You pays your price you gets your horsepower ! !
GM, Ford and Chrysler also have great technology, BMW is just an example bearing in mind that BMW's consistently rate # 1 in engine design by industry judges.
Because they are a performance oriented company and invest the money, that's just the way it is.
Hope I answered your question with a simple answer
Norm...
2007-08-25 17:26:48 · answer #1 · answered by Norm W--- rocks :-) 2 · 0⤊ 0⤋
The cam timing, valve size and compression can make a good bit of difference. Also the ducting for the intake, and the type of filter used, among other things can affect the Horse Power developed. Then some manufacturers rate more conservatively than others. The only true way to see which is right is put them both on a dyno.
2007-08-25 23:45:32 · answer #2 · answered by mustanger 7 · 0⤊ 0⤋
hmm, alot can change hp and torque my friend.. maybe the 4.4 has a larger stroke, hince the torque is higher. but it loses top end hp and heads/valves do alot for you.... bigger valves =better air to fuel ratio = more go power. manufatuer b could have higher compression than the other.. so many things go into play here.
look these things up on wikipedia, you will learn alot.
pistons shape
bore to stroke ratio
heads cams and valves.
stroke
compression ratio
2007-08-25 23:50:39 · answer #3 · answered by Ryan B 3 · 0⤊ 0⤋
cam lift and duration or intake runner design like dual plane manifolds or variable camshaft timing, exhaust port design, better fuel management via advanced computer controls
The whole trick to getting more horsepower and torque out of an internal combustion engine is to get the Air fuel mixture in and out of the cylinders as fast as possible with complete burning of said air fuel charge.
2007-08-25 23:46:47 · answer #4 · answered by Magikmann 4 · 0⤊ 0⤋
Get all the engine specifications from both engines and figure it out yourself. It sure isn't rocket science. You didn't name the manufacturer, year or model of the motors. Maybe you could be more specific and we would be more willing to help. Shadow games are for kids.
2007-08-26 00:01:15 · answer #5 · answered by Country Boy 7 · 0⤊ 3⤋
Compression ratios and cylinder head (valves per cylinder) design.
2007-08-25 23:41:32 · answer #6 · answered by Jody D 6 · 1⤊ 0⤋
"B" is a higher compression motor.
2007-08-25 23:43:35 · answer #7 · answered by turbocivic89 4 · 1⤊ 0⤋