[s-cars] Bottom-End...

[Cody Payne]

I see that the 20V 7A is 10.3:1 where the 20VT AAN is 9.3:1
http://20v.org/specs.htm
http://www.s-cars.org/urs4s6/Tech/tech.html

A VW Compression Ratio Article:
http://www.tunacan.net/t4/tech/cr.htm

So I guess this tells me that if I am running 10.3:1 that:
-1) May have a detonation issue and need to adjust/retard the timing a
bit
-2) Heat could be an issue
-3) Engine Longevity could be an issue?
-4) Increase HP and bottom end torque?
-5) More potential then normal to bend stock rods w/ above increases?


Let the fun begin...

cp

-----Original Message-----
From: mlp qwest [mailto:mlped at qwest.net] 
Sent: Tuesday, January 13, 2004 10:06 PM
To: mlped at qwest.net; Charlie Smith; Cody Payne
Cc: Audi S Car List
Subject: RE: [s-cars] Bottom-End...


Whoops - http://www.sae.org/automag/newenginereview/audi.htm

~-----Original Message-----
~From: s-car On Behalf Of mlp qwest

~FWIW, Audi still seems to be doing something like this with its "low"
vs. ~"high" output 1.8t motors.  I.e., the high output apparently runs a
CR of ~8.9:1 and a K04 turbo to make 225hp/165kW & 280Nm/207 ft-lb while
the "low" ~output 1.8t runs a 9.5:1 CR with the smaller K03 to make
180bhp/132kW and ~235Nm/173 ft-lb. ~ ~Why, lower compression? ~ ~Mike ~
~ ~~-----Original Message-----
~~From: s-car On Behalf Of Charlie Smith
~
~snips
~
~~If you need to rebuild the rest later, you absolutely will .....
~~fitting oversize forged lighter, lower compression, pistons ~
~~    - Charlie
~