[DMCForum] Re: Odd fire vs even fire PRV

["cruznmd" <racuti1@xxxxxxxxxxxx>]

Thanks for sharing this info and the pictures Martin. I'm following 
this project with interest.

Rich A.
#5335

--- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> 
wrote:
> 
> Hi All
> 
> Having finally got around to stripping down my Renault 25 turbo 
engine,
> I thought some people might be interested in the differences 
between it
> and the DeLorean engine.
> 
> The DeLorean is an odd-fire with shared crank pins. Renault made it
> even-fire by offsetting the crank pins.
> 
> http://www.delorean.co.uk/cranks.jpg
> 
> (DeLorean top / R25 bottom - the picture makes the left hand crank 
pin
> look solid, but trust me, they are all the same!)
> 
> This particular engine has a capacity of 2458cc which is achieved 
with a
> 91mm bore (same as the DeLorean) and a 5mm shorter stroke. This 
5mm then
> goes into beefing up the pistons, which are -not- forged, although 
the
> conrods are. Hopefully this photo will show the increased height 
of the
> crown, and the considerably larger little ends. DeLorean right, R25
> left. (the R25 piston has one of its shells missing - I'll be 
changing
> them anyway but didn't think of that when I grabbed it for the 
photo)
> 
> http://www.delorean.co.uk/pistons.jpg
> 
> All the best
> 
> Martin

---

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