Too scared or V8

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The Mad Hat Man said:
hey - take 5 - that implies that bhp goes up as revs increase, providing the torque remains constant, but it dont - torque normally peaks at low rpm (relatively) but bhp keeps climbing to somewhere near max revs.

i dinna ken yo formula
Click to expand...
Yup, that is right, and Torque and BHP are numerically equal at 5250 revs.

Torque is the amount of grunt you have, and BHP is the work rate, a bit like electricity - think Amps = Torque, Volts = engine revs and power is in Watts (750 Watts = 1 BHP). So, you have a load of low end grunt, but the engine revs (work rate) are low so the actual amount of power you are giving is not very much. At higher revs, you have less torque, but the engine is working faster and thus giving out more power. Here endeth Engineering 101 ;)
 
redhand said:
Do chevy make a 3.5ltr V8 I thought they started around the 4.2ltr mark
not really a fair comparison is it.
Click to expand...

I'm thinking the Chevy V8 will be a better engine to put in than the rover. Didn't Overfinch use Chevy engines in the RR?
 
Take5 said:
Yup, that is right, and Torque and BHP are numerically equal at 5250 revs.
Click to expand...



Just look at the attached graphs.
As I stated before, Torque tends to peak low down the rev range and then taper off - the BHP peaks a lot higher.
 

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The Mad Hat Man said:
bollix!
Just look at the attached graphs - there is no way that Torque and BHP are numerically equal at 5250 RPM.
As I stated before, Torque tends to peak low down the rev range and then taper off - the BHP peaks a lot higher.
Click to expand...

The torque does taper off but what does it taper off to, i cant see the measurements. You might find it tapers off to a similar figure to what the bhp climbs to maybe.
 
sorry - poor copy - the x axes on the two graphs are....
bottom graph - Torque base line 150ft/lb - max 300ft/lbs (50ft/lb squares)
top graph - horsepower (BHP) base line 0 - max 250bhp (50BHP squares)
 
riggaz said:
I'm thinking the Chevy V8 will be a better engine to put in than the rover. Didn't Overfinch use Chevy engines in the RR?
Click to expand...
will yer stop sproutin utter ****, when yer finally grow up and start work you'll look back at yer time on LZ and cringe.

"THE chevy V8"
which would that be?

the 265, the 283,the 327,the 396, the 427 or the all time favorite of custom car builders the 350?

each of these injuns came with various carb and tunning packages giving a range of HP from around 180HP to over 5000HP, and like any engine the more you squeeze outta it the less lifespan it has.

so you could easily get a shed load more power and torque from yer rover v8. if you wanted to shorten the life of it, much like the bmw engines and jap bike engines

when you stop pretending you work in, let alone own a garage and start listening to what those that know tell yer the sooner you'll be taken of the **** list.
 
one thing those graphs DO show - is that the "std" 4337 stroker kit increases torque from circa 220 to 280 at the same RPM - ie 2500. A significant and useful addition fur climbing steep hills or towing :D and as useful as the TDI's 232 ft/lb at 1950 RPM.
 
slob said:
was it too much HP or too much tork wot done this?
Click to expand...

That was caused a failure to maintain equal speeds at each end of the propshaft. basically one end decided it wanted to spin faster than the other. As they cudn't agree with each other they decided to go their seperate ways. An amicable seperation If I ever saw 1
 
I dunno, you spend 4 years of yer life studying Engineering, then no-one believes you when you mention some basic engineering concepts :(

Ah well...
 
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