Re: Stroker Crank

[Dan Bubb <jdbubb@ix.netcom.com>]

Yeah! It'll make it an interference engine! Not in the conventional
sense that the valves can hit the pistons if the timing belt breaks. In
the sense that the engine WILL NOT TURN MORE THAN 1/2 TURN BEFORE THE
PISTON HITS THE HEAD!!
Ya know, I don't want to come off as a prick here, but the pistons come
to within ~1mm of the head on a stock VW. Increasing the stroke by 3.6
mm means the piston will travel 1.8mm higher in the bore. And that means
the piston will want to put a .8mm dent in the head and that's not even
accounting for rod stretch at high engine speeds!
You don't just drop in a stroker crank. YOU HAVE TO CHANGE EITHER THE
RODS OR THE PISTONS!
Assuming the pistons have the same dish volume the compression will bump
up a point or so!
Shit! I went all over this compression ratio increase stuff 2 months ago
on the list bumping the issue back and forth with Larry Fry. It's not
that big of an increase, but I'm not going to figure out the effing
equations AGAIN!
Dan

Kervin Ridgley wrote:
> 
> So, I guess there would be a big bump in compression on my JH if I did
> this.  Like Christian asked, is this then going to make it an
> interference engine?
> 
> Kervin
> 
> Randy B wrote:
> >
> > Kervin,
> > I believe that is a stroker crank (90.5mm) for the earlier E and F series
> > motors with the 76.5mm & 79.5mm cranks.
> > For Example:
> > PL/JH/RD -  (stock 1.8L 16V & 8V) 86.4mm stroke/81mm bore = 1781cc
> > My Techtonics Tuning motor 86.4mm stroke/82.5mm bore = 1847cc
> > PL/JH/RD+ that stroker 90.5mm stroke/81mm bore = 1865cc
> > 9A - (stock 2.0L 16V) 92.8mm stroke/82.5mm bore = 1984cc
> >
> > It would give you a nice healthy motor by putting it in a stock 1.8L.
> > Installing a stock un-modified 2.0L would probably be a better tho' IMO.
> >
> > HTH,
> >
> > Randy
> >
> > > I'm in the middle of cruising e-bay and I saw this item
> > >
> > >
> > <http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=598979936
> > &r=0&t=0>
> > >
> > > Will this and a regular 2.0 block produce a 2.1 or something?
> > >
> > > --
> > > Kervin
> > > 80 1.7 8v Found a small crack in the dash
> > > 82 1.7 8v The gift
> > > 86 1.8 8v My everyday ride
> > > 00 tt600 more HP than my car
> > > 00 Habanero my cheap ti ride
> > > 00 IF Delux XT-Bomber
> > >
> > >
> > > --
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> > >
> > >
> >
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> 
> --
> Kervin
> 80 1.7 8v Crack free dash
> 82 1.7 8v The gift
> 86 1.8 8v My everyday ride
> 00 tt600 more HP than my car
> 00 Habanero my cheap ti ride
> 00 IF Delux XT-Bomber
> 
> --
> Email LIST problems to: scirocco-l-probs@scirocco.org.
> To unsubscibe send "unsubscribe scirocco-l" in the message to majordomo@scirocco.org

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