How do they...

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tvradict

Original Poster:

3,829 posts

275 months

Monday 25th March 2002
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Right, I know a bit about engines, ask me to take one apart and I'll give it a shot before politely telling you were to shove it!
I know how the power is produced by a 4 pot, Aero engines and the such. 4 Stroke cycle is like candy from a baby!
Can someone (either by posting here or e-mailing me) please explain the technical bits of V8's and V12's, like, how the hell do they produce so much power and torque?!?!?! A V8 is basically 2 4 pots joined at the crank, obviously not quite as simple! The same goes for a V12, 2 6 pots (TVR did exactly that with their V12)! I'm a tad confused by the machanics of V engines. Help!!!

tvradict

Original Poster:

3,829 posts

275 months

Wednesday 27th March 2002
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Ok, now I know that more pistons = more power/torque! But, which is more powerfull, a 4litre InLine 6 or a 4 litre V6???
How much effect on the power/torque does the Vee angle make (before you ask, i'm not going to design/build/run my own V8!!)

tvradict

Original Poster:

3,829 posts

275 months

Friday 29th March 2002
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Cheeers Guys! Now I'm starting to get a clearer picture!

Right, so there is no benefit to Vee engines other than space?!?! They give less torque but more power!! So why then, is the Griff 500 so god damn fast?? Engine specs of the Rover V8 (as supplied by TVR. Vat of Salt anyone??) 90 Degree Vee. Bore/Stroke(mm) 94x90. Somebody Please explain Bore/Stroke. Max RPM 6000. I thought Vee engine couild tolerate Higher RPMs. My 4 pot revs higher than that!!! Max Power 320bhp. Max Torque 320lb/ft! This doesn't make sense to me! Why does this engine have the Same amount of Torque as it does power. And Acceleration figures to confirm it?!?!?! Am I right in thinking that the Rover V8 uses a cam which can make use of torque at (maybe) the expense of power???

quote:
All engines are only air pumps, the more air pumped through it the more power it will develope
that has got to be the best explaination of an engine, any engine, I have ever ever heard!!!!

I think I am starting to get this now! If I re-read this thread a few times, I think I will understand a bit better!!!

tvradict

Original Poster:

3,829 posts

275 months

Monday 20th May 2002
quotequote all
Is that not because the engine is so 'heavy'?! Moving 8 cylinders without (technically) using any more fuel. so the revs drop off viciously!!!

My 4 pot runs on for hours on 3rd or 4th! 5000 rpm in 4th ~90mph. Lift off and the speed drops below 60 about 3/4 mile later!!

Well, at least it does when the clutch works