[s-cars] Bottom-End...

[Joseph Pizzimenti]

Do it, you wuss.

Might want to consult mlp on this one, as you're not
going to have 10.3:1 or 9.3:1 for your compression
ratio, but somewhere in between because your mix and
matching heads/pistons.  

I would swain tech those pistons, too, and keep boost
down to 15psi...or go with 8.5:1 pistons?

Pizzo

--- Cody Payne <cpayne at bconnected.com> wrote:
> 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
> ~
> 
> 
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list


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