Step by step . . .

[Iain Atkinson]

If i can add my two pence worth here, i have run both 10v and 20v na
engines, in my mind the 20v is the better engine apart from the lack of
torque at the bottom. I have in my 90q 20v a standard engine but with K & N
panel filter (slightly moded air box) and a stainless straight through full
exhaust system minus cat. Now with just these mods the engine breathes so
much better and pulls like a train above 4k rpm, it's still a bit slow below
that.

The nice thing about a turbo swap is that you end up with a more tuneable
engine, my brother in law has an S2 with similar mods to mine and that picks
up really well from 2k.


Iain

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of Dave Hord
Sent: 29 January 2003 19:14
To: JShadzi at aol.com
Cc: InfernoCL; 'R Mangas'; quattro at audifans.com
Subject: RE: Step by step . . .


Time for me to jump in...

Javad, I had no idea you were an NA man as well!!

"since I got my start massaging NA VW and Audi motors, I'm happy to pass on
some info"

I've been toying around with the idea of doing up an Audi 20V (7A) motor for
my
90q.  I'm well aware that $/HP will be higher then if I do a turbo
swap...but
I've just never liked the feel of a turbo.  Working at Vibrant I've been
able
to drive more then my fair share of them too ;-)

What do you think of the 20V platform?  Better to go with a 10v or the 20v?
I
already have the NG in my '89 90q...so I could play with that...but thought
a
20V might be interesting.  Not to mention allow a little more tuning with
adjustable cam gears etc.

My thoughts would be to buy a 20v, strip it and do a 'stage 4' upgrade on it
before dropping it in the car.

Basic plans would be to do the following...regardless of 10V or 20V:

Intake - Filter, full port and polish.  Might as well polish the TB while
I'm
there...not that I expect it to do anything.

Valves - Should I play with size, or just do a proper valve seat?

Bore/Stroke - I have no ideas here...still need to read up on the effects of
changing it...any thoughts?

Pistons - Wiesco...just because I think I have a contact there.  What about
rods?

Cams - 272 on the 10v, not sure about the 20v at this point.  Might go with
something even more extreme...and ignore the 'lumpy' or 'eight-stroking'
idle.

Adjustable cam gears, just to see if I can 'tweak' the powerband a little
bit.

Exhaust - Custom exhaust header (I think I can handle that ;-) as well as
full
cat back exhaust (already done I might add).

My thoughts are to start with the above and see what sort of gains are
pulled.
The goal being to increase the power and torque but on a much more linear
curve
vs. a turbo application.  I'd probably move (after ensuring the darned thing
runs) over to a 034efi or Megasquirt set-up...just to have a little bit more
room to play with.

At this point I'm just playing with ideas in my head...so the option of
20v/10v
plus all the parts are still way out in the open.  For the moment lets
assume
money is no option...it WILL be an option, but might as well dream for the
heavens and then determine which stratosphere I can actually hit.

:-)

TIA

-Dave Hord - Mississauga Ontario, Canada.  Also not scared to admit it ;-)


---------------------------------------------------
89 90q  300km+ Rally Conversion...
Roll cage shots available at:
http://home.the-wire.com/~spokes/rollcage/page1.htm


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