V8 engine noise question.

[backwoodsman]

May be a daft question, but something I've always wondered.

Why do some V8 engines burble, ie, 57 Chevy, and others scream, ie, Ferrari.

Most 4 cylinder, and straight 6s sound like each other, so why the difference in V8's?

[GadgeS3C]

Google flat plane vs cross plane cranks.

[A900ss]

I think it's to do with the degrees of the crank.

Flat plane, 45 degree etc.

Someone with a large brain will be along shortly with a full answer but its to do with the time interval of the cylinders firing.

[Zad]

Flat plane cranks effectively operate as two 4-cylinder engines. Cross-plane ones interleave the firing (and so exhaust pulses). Cross-plane cranks are heavier though, with more rotational mass, so tend to be less efficient and less responsive.

[fjord]

ITS CUZ OF DA PETROLZ BURNING FASTA IN FERRARI THAN SHEVVY.

[backwoodsman]

GadgeS3C said:

Google flat plane vs cross plane cranks.

Thanks, you learn something new everyday.

[anonymous-user]

And firing order, BB chevvy sounds very different to a modern LSx. Muscle cars rock!

[JDMDrifter]

http://www.projectm71.com/Cross_FlatPlane.htm

This is fascinating, always wanted to know why a 458 doesn't sound like a charger and now I do