Why are the L5 Turbo engine sounds different ?

[fdekat]

>Louis-Alain Richard larichard at plguide.com 
>Tue Feb 10 18:33:46 PST 2009 

>Spent the night at the pub with Brady (urQ, 4kq, 200qa20v, 240Z) and Geraint
>(200qa10v, 964, GTI Mk2, Spridget), obviously most of the talk was about
>cars. One question is still unsolved : why is the sound of the L5 10VT and
>20VT so different ? We have some thoughts about it, but I'd like to hear
>from others.
 
>We agreed that the 10VT is better sounding : rougher, deeper, richer.

>What is the list wisdom on this ? Which is better, but more important, why
>the difference ?


You ask a very good question, and one that I have wondered about also..

I think I *may* have an answer. I now have two urqs, both with MC1
conversions in them.  However, one has a K26 turbo, and the other has a K24
turbo.

I'm thiniking that the different turbos  may be the reason for a lot of the
difference in sound. All other things being (almost) equal in my case, the
one with  the K26 sounds *soooo* much tougher.

Now if you look at the naked turbos, there is a fair amount of difference in
the turbo outlet size. 

My theory is that the much smalller turbo outlet of the K24 turbo does a much
better job of acting like a 'muffler', and keeps the interesting noises
trapped inside, while the larger K26 turbo lets the good sounds out.. :-)

=Frank de Kat=