Can it be done? 20V head on a 2.3 NG?

[ScottyCBoy at aol.com]

Dave,

With a 8:1 compression ratio it would be a complete waste of time. I would be surprised to see you increase the power of your 10V engine even with the extra flow you would get with the 20V head.

You'd be better off to have your 10V heads ports polished and get a decent 10V cam.

Now if you want to add a turbo to your project then you could make some decent power.



Scott


In a message dated Thu, 2 May 2002  4:10:04 PM Eastern Daylight Time, <David.Ullrich at ferguson.com> writes:

>OK, so it CAN be done. So, is it worth it? What kind of power would it make? 8:1 CR seems low to me, but the extra valves help make up. So is a break even deal? Of less power? Coming up with custom exhaust shouldn't be a problem. So, how hard would the fueling issues be to correct?
>
>Dave
>
>1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
>1998 VW Passat GLS 1.8T - For Sale CHEAP
>
>
>-----Original Message-----
>From: JShadzi at aol.com [mailto:JShadzi at aol.com]
>Sent: Thursday, May 02, 2002 3:45 PM
>To: "Brady Moffatt"; "Ken"; quattro at audifans.com
>Subject: Re: Re: Can it be done? 20V head on a 2.3 NG?
>
>
>The 10v comb. chamber is 29cc, the 20v is about 38cc, the resulting drop in compression is more like 8:1, not 7:1.  Yes, the head fits perfectly, you can even use the stock NG head gasket, the real issue is intake/exh. configuration and proper fueling.
>
>Javad
>
>In a message dated Thu, 2 May 2002  3:20:55 PM Eastern Daylight Time, "Brady Moffatt" <bradym at sympatico.ca> writes:
>
>>Yup, I'd imagine that in order to fit 2 more valves into a combustion
>>chamber, you might have to make it a bit bigger, and/or dish the pistons a
>>bit more. However, to drop the CR from 10:1 to 7:1 you'd have to add almost
>>26cc to the volume. That's a 50% increase! That seems _highly_ unlikely.
>>
>
>