[DML] Re: Production twin turbo PRV
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[DML] Re: Production twin turbo PRV



Hello Martin,

Sorry, I just add this precision because I believed that you said it 
as a generality. ;-)
The A610 produce 250hp that is enough for the DeLorean IMO.
The Safrane twin turbo was not the only twin turbo engine in 
production, Venturi produce their engine like Renault even if it was 
not in the same amount of production.
At the beginning, the Safrane twin turbo engine was developed by 
Hartge, it took ages to the German company to made this engine so the 
BEREX had to finish the job for Renault.

About the Venturi "hybrids" engines, I'm sure that a lot of people 
would like to have one, Venturi used the same way as all other race 
specialists do : take a big block, change pistons, rods, heads, cams, 
valves, etc? and made all working together and I'm not sure that
DMCH 
do not use the same way to build their engines. As far that I know, I 
do not know any other PRV delivering more than 400hp and with a 
mileage greater than 100.000kms.
Why should we not used this way to improve our cars ? Personally, it 
does not matter if the engine is "hybrid" or not if I get what I 
want. It is just my opinion.

I had the chance to use several cars on race circuit, Alpine V6 Turbo 
Europa Cup, Alpine A610 Turbo, Venturi 260 APC, Venturi 260 
Atlantique, Venturi Atlantique 300 and Venturi 400 Trophy so I can 
compare them between each other. I think that 250-300hp is the best 
solution for the DeLorean, it is not really easy to use efficiently 
more than 400hp on a regular car. 

Best regards from France,

Chris.
#04271/DL1981

--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> wrote:
> [Moderator Note:  I realize this has strayed a bit off topic, but 
the subject seems to have some historic value so I'm letting it run 
for a while.  Please hold back your complaints, I won't let this 
subject go on forever.  - Mike Substelny, DML moderator of the week]
> 
> 
> >First, I almost sure that the A610 Alpine never had a twin turbo, 
> >this setup was only used on some competition cars.
> >
> I never said it did. The only production twin turbo PRV was in the 
> Safrane Bi-turbo which also had the balance shaft - something the 
A610 
> didn't. I don't know for sure but would guess the Saf also has 
hydraulic 
> tappets - the A610 doesn't
> 
> >
> >Do you want to see one of the best engine evolution ? Would you 
want 
> >650hp in your DeLorean ? 
> >
> While Venturi did produce a couple of wierd and wonderful PRV 
hybrids, 
> they were just that:  hybrids. The 260 had a late 2.8 litre 25 
turbo 
> engine (which if the pistons were still available would be the best 
> solution to turbocharging the DeLorean engine). The Atlantique 300 
at 
> 281bhp was the most powerful of the 12v's a but was a hybrid of the 
25 
> turbo / GTA heads on a 3 litre bottom end giving it 7.6:12 
compression 
> and the ability to run over a bar of boost. These were all single 
turbo
> 
> The 600LM is a blinking LeMans car! It's a 3 litre bottom end mated 
to 
> heads from a Peugeot 605/ Citroen XM 24v with proprietary 
cams/lifters. 
> In roadgoing form it knocked out 400bhp but the engine is still a 
hybrid 
> and was produced in really small numbers. This is the only other 
twin 
> turbo but the engines weren't built at Douvrain
> 
> Martin







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