[T3] CC, CR, and some other questions....

[DAVID WALTERS <waltee@prodigy.net>]

Good evening to everyone, I've had some questions
arise in the last few days and I can't find the
obvious, jump-out-at-ya answers in any of my books. I
think I came close but, just don't know. And so I am
turning to you all, cuz' this is my first try at this
and sometimes it hurts to be a newbie. Here goes:
 The engine is apart in the garage, new slugs and jugs
in a box next to it. The old slugs: 85.5, ditto the
new ones. Same crank as before: I measured it at 70
mm, should-be, could-be a 69 mm? (I thought there were
no 70 mm cranks, is this right?) AAR, deck height
measured on 1 cylinder (bolted down at TDC) at .055"
(.030+.025+ wouldn't take a .001" feeler gauge) along
with a 56 cc(is that right?) on a stock 041 head gives
a final of 1585 cc's (@69 X 85.5mm's). I know I need
to measure the other 3, but I'm assuming similar
results. Enough of the math, now for the questions
1. Deck height should be optimal at .055" to.065", is
this right? This motor had no shims/ no spacers on the
barrels when I tore it down, I hadn't planned on
putting them on unless I had a cylinder out of spec.
2. I understand I should have a motor with a CR at
7.2:1 with the 56 cc combustion chambers on the stock
041's. She wouldn't run worth a lick on 87 octane fuel
before the teardown, only 92 or better. Was I/am I
asking for trouble at 7.2:1 on a daily driver? The
power was adequate, I'm perfectly happy with longevity
and reliability over gobs of power at this point. The
final motor will have the 34 ICT's, 041's w/ a mild
p&p, 1:1 rockers w/ the swivels from before but
probably with some Berg hardware to beefen things up,
and the tuned exhaust w/ Jetcoat from before. I do
plan on balancing out the pistons, I was told it's
cheap insurance to be as close as possible on weight
and within .5 cc on CR for the best performance. If
anyone can give me the bottom line or at least point
me in the right direction (I can't find Bob Hovver's
sermon's anywhere on the web), we would really be
appreciative. Thanks,
David Walters
'73 1600 L Notchback (in 1600 little pieces in my
garage)
S. FL, USA 


------------------------------------------------
To unsubscribe, E-mail to: <type3-off@vwtype3.org>
For more help, see http://vwtype3.org/list/