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rdpg_Oktane
December 8th, 2004, 18:54
I heard some people saying that the gallardo´s V10 where based on Audi´s V8 engine, basically simply "adding" 2 more cilinders, everyhing else would just be the same.

do you know anything about that engine development?

please help!

Nordschleife
December 8th, 2004, 21:19
it is certainly a development of the v8 engine.
Its on the same bore centres, but it is much more than a v8 with 2 extra cylinders.
It has a very high specific output immediately, with more to come. It has a dry sump, dual variable inlet and outlet manifolds, an 18 degree offset crank pin to keep the engine properly balanced
720/10 = 72 + 18 = 90 which is the v angle.
The casting is very advanced, the technology is being transferred to Gyor so the entire engine can be made there.
R+C

Erik
December 8th, 2004, 22:17
But it sounds like two times the old 5 cylinder Audi engine. :D

Great car! :race:

rdpg_Oktane
December 9th, 2004, 01:59
Originally posted by rdpg_Oktane
I heard some people saying that the gallardo´s V10 where based on Audi´s V8 engine, basically simply "adding" 2 more cilinders, everyhing else would just be the same.

do you know anything about that engine development?

please help!

thanks for the tech info, as usual :mech:

I got that reply in a lambo forum, don´t know if you have acess to it.



The answer is "yes" and "no".

Confusing isn't it?

In reality, the majority of the engine is based on (and made alongside with) the current 4.2L V8 that is utilized in multiple Audi sedans.

However, Audi engineers added things like a dry sump lubrication system, a variable-length inlet manifold, and of course variable valve timing to the Gallardo's engine.

In that respect the Gallardo's V10 could be rightly considered to be an evolution of the 4.2L V8 more than simply the same engine with two more cylinders.

Mr Balsen
December 9th, 2004, 08:12
Robin,

Can you tell me what is:

"an 18 degree offset crank pin to keep the engine properly balanced"

It is not a surprise that Audi is reusing component for a new engine. The Audi V8 was developped from the VW 4 cylinders 1,8 inline engine. First V8 was 3,6 l (2 x 1,8 = 3,6)

Cheers from Paris,
Frederic

Nordschleife
December 9th, 2004, 12:56
Originally posted by Mr Balsen
Robin,

Can you tell me what is:

"an 18 degree offset crank pin to keep the engine properly balanced"

It is not a surprise that Audi is reusing component for a new engine. The Audi V8 was developped from the VW 4 cylinders 1,8 inline engine. First V8 was 3,6 l (2 x 1,8 = 3,6)

Cheers from Paris,
Frederic

Fred
here is how it works, you will have to excuse me for doing it really simply, but its easier for everybody that way.

The engine is a 4 stroke, which means all 10 cylinders fire every 2 revolutions.
2 revolutions is 2 x 360 = 720 degrees.
So a 10 cylinder engine fires every 720/10 = 72 degrees
To keep everything balanced, you therefore use a 72 degree V engine block.
However, you want to keep the engine weight as low as possible, so you use a 90 degree V engine block
this means that the engine will not be perfectly balanced, so you offset the crank pin
90-72 = 18 degrees, which is the amount by which the crank pin is offset on the V10 engine.

Interestingly, BMW, with their new V10 engine only manage to offset the crankpin 17 degrees, but it still feels smooth.

R+C

A418TQTip
December 9th, 2004, 20:39
Originally posted by Nordschleife
Interestingly, BMW, with their new V10 engine only manage to offset the crankpin 17 degrees, but it still feels smooth.

R+C

They also managed to keep unwanted pounds off. Gotta love German cars! :thumb:

freerider
December 10th, 2004, 00:58
If you would like to learn more about this, i have some intersting sites (depending on how much you know).

http://www.e31.net/engines_e.html

RS4Ever
December 10th, 2004, 19:50
Originally posted by Nordschleife
Fred
here is how it works, you will have to excuse me for doing it really simply, but its easier for everybody that way.

The engine is a 4 stroke, which means all 10 cylinders fire every 2 revolutions.
2 revolutions is 2 x 360 = 720 degrees.
So a 10 cylinder engine fires every 720/10 = 72 degrees
To keep everything balanced, you therefore use a 72 degree V engine block.
However, you want to keep the engine weight as low as possible, so you use a 90 degree V engine block
this means that the engine will not be perfectly balanced, so you offset the crank pin
90-72 = 18 degrees, which is the amount by which the crank pin is offset on the V10 engine.

Interestingly, BMW, with their new V10 engine only manage to offset the crankpin 17 degrees, but it still feels smooth.

R+C


wow. great info.

i always enjoy reading what you have to write. :0: