stroker I-5?

[Michael Gough]

Javad wrote a bunch of stuff down there...Good stuff. I just have a little
to add. If you use the EV block, it is a tiny bit taller. This means
changing some of the downpipe stuff, not a big deal. It also means that you
can use a longer rod, and have a better rod ratio than using the big crank
in the little block. I don't remember how much taller the EV block is, but
I'll try to find it. I think its probably the same difference as the 2.0
Audi block vs. the 2.0 VW crossflow engine. Now you're getting into really
$$$ stuff with new rods and pistons.....I'm going to do some digging, and
see if the EV could possibly be populated with turbo rods and pistons
cheaply, but from what I've dug up so far, it looks unlikely. And it's also
unlikely that the stock EV pistons and rods could stand up to power levels
past what a reasonably built MC motor can do.
Mike


> Its been done, but hardly popular, only a few examples really.  One way to do
> it is to aquire the Eurovan bottom end, bolts up more or less to any of the
> 10v heads, though there are timing belt length issues to deal with, but if
> you keep the EV timing belt, etc its not too bad.  Only problem is the EV
> block does not have oil squirters (which can be machined to fit) or any
> provision for turbo charging as in oil line exit/return or places to mount
> the Motronic hall senders on the block for the flywheel.
>
> Using the 95.5mm crank, stock rods, custom pistons can be made moving up the
> wrist pin, but this reduces the top ring land making the pistons more prone
> to detonation damage.  Conversly, stock pistons can be used with custom
> shrotened rods shrotened.  In the MC, however, the stock 136 mm rods start
> getting real short once you knock another 4.5mm off them, but its doable.
>
> I have sourced a 92.8mm crank that I am building a stroker motor around.
> With a bore of 82.5mm this will give me about 2.45l or so.  I will be
> sourcing custom rods and pistons to maximize the rod ratio.  I am also using
> a 20v head.
>
> Javad
> 80tq.com
>
> << Hi all,
>
>  Has anyone done a stroker conversion, NA or turbo?
>  The Eurovan stroke is 95.5mm vs Audi's 86.4mm.
>  You could end up at 2550cc with huge torque. Just wondering what would be
>  needed other than crank and pistons or rods.
>
>  And with a turbo......
>
>  I know in the Z community, turbo strokers are rare. How about here?
>
>  Cheers,
>  Brady Moffatt
>  Montreal, Quebec, Canada
>  86 4ksq, 280,000km
>  72 Datsun 240Z, 180,000 miles
>   >>