Re: [DMCForum] Re: 24valve 3.0 PRV

[Martin Gutkowski <martin@xxxxxxxxxxxxxx>]

Christophe Vieira wrote:

> Yes, engine and gearbox are almost French parts as this engine has
> been used in many different cars (Peugeot 505, 604, 605, Citroen XM,
> Alpine A310, A610, all Venturi...).
> It's possible to swap the crankcase on the engine as some Alpine A310
> use the 24V PRV in the same position as the DeLorean.
> I've been told by an Alpine specialist that you just have to unbolt
> the crankcase off the 24v PRV and bolt on the one from the DeLorean
> engine without any kind of problems.

The Alpine never had the 24 valve PRV - it's too late for the 310 and 
the 610 had the 3 litre 12 valve turbo lump. The Atmo had the carbed 
2.85 and the GTA V6 Turbo had the same engine as the 25 turbo - the 
2458cc turbo. All the alpine's use the same mounts as the 25 which are 
the same as Bill Robertson's - identical but the mounts are in the 
middle. The DeLorean crank case is RENAULT 30 - the sump is visually 
identical but the D's is slightly deeper needing those spacers on the 
oil pickup and a unique dipstick tube. The only 24 valvers were 
available as an option in big Peugeot, Citroen and Renaults from 95-97 
and was then replaced across the board by the 3 litre 24v 60 degree PSA 
V6 which is still in use today. As far as I know the gearbox in the 
Citroens is very different, as it was in the Renault Espace for example 
where the engine sits transversely. The Venturi is a lore unto itself, 
with a heavily modified 24 valve 3litre twin turbo, twin intercooled 
rear mounted PRV on the end of a UN1. The heads in the Venturi engine 
are not the same being twin-cam I believe. However, all PRV's including 
the 24valver carry the same bottom end as the turbo lumps meaning with a 
change of pistons, you can blow those engines with no fear of damage. 
The rarest version is in the Renault Safrane which had a sequential twin 
turbo setup - this was reserved for the french market alone. I've made a 
friend in the guy who runs www.renaultalpine.co.uk who is dropping a 24 
valver in his Atmo

Martin

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