Im thinking it would be awesome but for practical reasons
I think a ga16de will fit easily or qg18de with your gbox

That does seem to be the problem with fitting other engines into the Cherry's the gear box issue.

Is there any idea use longer rods and lower piston?? I dont like those motorcykle engines in car.....

Not much room for longer conrods but I dont think its an
issue as you wont be revving over 9000rpm?

If so you FWD guys might as well fit E series engine in there
or ga16de engines which have almost the same bellhousing pattern.
Especially if its for racing only.
The ga16de has potential to make 180-190hp or 25% less than a sr16vve.
In turbo form some ga16de are around 280-320hp atw.

Motorcycle engines in lightweight cars do really make sense, as much as I love the A-series if I weren't concerned about keeping the car vintage legal I'd do it in a heart beat. A regular street bike engine has the same level of technology as a pure race engine.

Now for a Cherry a bike motor would be a slam dunk: first ditch the engine and tranny. On our bike powered single seater my fabricator used an H145 limited slip, which he sealed, then machined a sprocket so it would bolt on just like a ring gear, then made up a carrier that pivoted so the chain could be adjusted, after that VW FWD half shafts bolted to to the LSD assembly. So for a Cherry your could use the standard half shafts bolting to a custom diff spocket assembly. I'm thinking a nice Ducati v-twin would sound really sweet but cost wise something Japanese would work better. You'd should end up with 175HP, stone axe reliable and likely drop the weight of the car by 50KG...........what's not to like.

Tom

what sort of power is to much power for a FWD?

Rallytwit I to think a nice Ducati v-twin would sound good and completely different to the Hayabusa or R1 Yamaha powered cars I think price for the ducati would be the killer of doing that conversion.

Tom any chance for some pics of the diff assembly you describe?
Ive been thinking for while also of a similar setup for my 1000
to sit in the rear like the Minis going around.

I think Troy the issue with FWD and too much power is the torque
and losing wheel traction/grip so a Ducati would be the wrong engine.
A Revvy 4 cylinder would be more matching or for less than a ducati
and a little more than some 4 cyl a v4 honda would rule as they are
not built for torque but as all honda engines revs and hp.

I do believe I have a picture of the diff somewhere I'll see if I can dig it out, scan it and post it here.

Tom

Love to be able to pick one of theses up cheap!

http://www.zcars.org.uk/univkit.php

Id really like Nick or someone else to make a tube box section
for a qr20de or other fwd-->rwd setup.
The cherry coupe would be awesome as a rear engined beast.