2.3L NG conversion in my 84 4KQ

[JShadzi at aol.com]

Ben, you are mistaken, the combustion chambers are identical (29cc), the 
compression bump comes from the pistons ONLY.

Audi engineers had a lot of reasons for going to the CIS-3 setup, but 
increased hp really had nothing to do with it.  The HP increase came with the 
NG bottom end, the CIS-3 is a more advanced version of CIS offering knock 
sensing, maps for the timing curves, diagnostic output tests, higher capacity 
fuel meter with higher system pressure, transistorized ignition coil, etc.  
These are mostly saftey measures to make the newer cars more "idiot proof" 
because of the high compression and possibilities for knocking and detonation.

Peymon's car is worth a few grand at the most, he will now run 92 octane, and 
for less than $1k he now has a basically brand new engine compartment.  This 
all after spending maybe 20hrs prepping and building the motor, and one 
weekend to swap it in, the result -I would estimate 140hp and a 0-60 of about 
7.5 sec, not bad.

HTH Ben, good luck with your projects.

Javad

In a message dated 7/18/2001 6:15:25 AM Pacific Daylight Time, 
BSWANN at arinc.com writes:

<< Javad,
 
 I understood that the higher compression comes from the Head on the NG
 setup, not the Block.  The high compression is largely what buys the
 additional Torque and HP across the RPM spectrum.  Someone correct me if I'm
 wrong.  I seriously doubt that the VW/AUDI engineers went through all the
 trouble to modify the 4 and 5 cyl. setups with these changes for such a
 limited return.
 
 Data Point:  this is similar to two 4 cyl swaps I did on Type 1 Scirocco:
 1) used 1.8l '85 Scirocco/GTI setup with lower compression and CIS with oxy
 and no knock sensor.
 2) used 1.8l '88 Jetta GLI engine with Motronic setup(I broke out portions
 of the systems to support CIS with oxy) and included the knock
 sensor/ignition portion from the '88 Jetta setup.
 
 The '85 1.8 8:1 was good.  The '88 1.8 10:1 and knock sensor blew the '85
 setup away.  A 268 cam and Gillette exhaust and header was later installed
 to sweeten it up even more.  
 
 I had considered putting in a turbo engine and did not for a few reasons:
 1) The NG motor was available for low cost, and I could have just plopped
 the thing in.
 2) The Turbo setup requires more retrofitting than just a wiring harness
 swap, including fitting of the Intercooler, and turbo oiling and cooling
 lines, etc.  It was just beyond the scope of what I wanted to do for a
 street car and my very limited time and budget.
 
 Maybe someday, if my wife doesn't kill me, I'll take on a turbo swap, but it
 will probably be in a newer car.
 
 Anyway, this is just to clarify and verify my sanity that what I am doing is
 in order, and that certainly the 2.3 swap you guys did was also.
 
 Happy Quattroing!
 
 Ben
  >>