Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Apr 2009
Posts: 1,036
OP
Has a lot to Say!
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V8 Power Curves
Here's an image of the dyno BHP and torque curves for my engine.
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Joined: Dec 2014
Posts: 216
L - Learner Plates On
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L - Learner Plates On
Joined: Dec 2014
Posts: 216 |
David,
so it took a complete modification of all components of the engine. Great to see whats possible based on the old central camshaft engines. Your engine is as efficient as the new Roadster, comparing power and torque considering the displacement. And I guess you don't have to deal with emission control, based on the age of the car. And I like the idea very much to keep a car for a long time and develop it according your ideas.
Thanks for sharing.
Ex-Roadster 3.7, now P6
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Joined: Apr 2009
Posts: 1,036
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Apr 2009
Posts: 1,036 |
Beltempo, it would be not too difficult to have found another 30 or 30 horsepower: bigger valves, higher lift camshaft, DHLA48 carburettors but then the expense increases considerably. The engine has perfect characteristics for road use and clubman competition use. it is so easy to drive and not over-stressed and so absolutely reliable.
Last edited by Cheshire_David; 02/05/15 07:40 AM.
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Joined: Aug 2013
Posts: 15,794 Likes: 15
Formerly known as Aldermog Member of the Inner Circle
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Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
Rover V8, 1950s Yankee technology, single cam, overhead valves and no ECU! But a "bit" modified... even so a very impressive result. The torque is particularly smoothly delivered! I'd really like to see the same data for the BMW plus 8, it would be interesting. A web search seems to be called for!
Last edited by Peter J; 02/05/15 02:56 PM. Reason: second thought
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Joined: Dec 2014
Posts: 216
L - Learner Plates On
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L - Learner Plates On
Joined: Dec 2014
Posts: 216 |
Last try: Peter, you mean something like that: BMW 4.8
Ex-Roadster 3.7, now P6
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Joined: Aug 2013
Posts: 15,794 Likes: 15
Formerly known as Aldermog Member of the Inner Circle
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Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
Brilliant...
Many thanks indeed!
It is now very clear why keeping the revs between 3000 and 4000 makes the car so effortless to drive.
At about 4500 the monster is let lose, I've not had the bottle to take it much above 5000.....
Peter
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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