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Thread: Nissan R91CP

  1. #1
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    Nissan R91CP

    For 1991, Nissan officially withdrew from the World Sportscar Championship. However Nismo planned to continue competition in the All Japan Sports Prototype Championship, and decided to upgrade the R90CPs to better compete with Toyota and Mazda. The new cars, known as R91CP and R91VP, would have slight modifications over the previous car. Most notably, the boxy turbo inlets which had been placed on the rear fenders of the R90CP were made into smaller slits, while a large snorkel was added to the top of the engine cover to better feed the engine. The cars would be further modified for 1992 with an upgraded VRH35Z twin-turbo V8, while the cars were renamed R92CP.

    Source: wikipedia.org
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    Re: last photo... I wasn't aware Nissan used a V12 in these cars.
    Never own more cars than you can keep charged batteries in...

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    Quote Originally Posted by csl177 View Post
    Re: last photo... I wasn't aware Nissan used a V12 in these cars.
    Smush two RB26s together and you get a 4.6L V12!

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    Quote Originally Posted by NSXType-R View Post
    Smush two RB26s together and you get a 4.6L V12!
    What could have been, makes me wonder.
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    Quote Originally Posted by LHamilton_w View Post
    What could have been, makes me wonder.
    5.2L, my mistake, but you get the idea.

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    ^^^ That new math again. I wuz kinda hopin' for an explanation from Frere Ferrer.
    Never own more cars than you can keep charged batteries in...

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    Quote Originally Posted by csl177 View Post
    ^^^ That new math again. I wuz kinda hopin' for an explanation from Frere Ferrer.
    Well, Nissan's Media site doesn't say much, but as far as I've been able to finde the all the R90-based cars ran the twin turbo 3.5 litre V8 (VRH35). However, the next Nissan Group C car (the P35/NP35) used this 3.5 litre normally aspirated V12, the VRT35, which I guess was first tested in the R91CP used in the IMSA championship in 1992.

    Pictures of the car are from the 1992 Daytona 24 hours.
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    From here:

    For an engine, Nismo would develop an entire new unit. Required to be 3.5 litres by Group C rules, the engine had to not only be high-revving like a Formula One engine, but also have endurance capabilities. Nismo produced an engine at 3499 cc named the VRT35, with claims of 630 horsepower (470 kW) and capable of reaching nearly 12000 rpm. The VRT35 would be a V12, in comparison to Peugeot, Toyota, and Mazda's V10 units.
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    That's what I found too, but it still doesn't explain how the V12 ended up in an R91CP.
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  10. #10
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    Mislabelled somewhere?
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