How much power does a 35 iS have ?
- Thread starter Mavster
- Start date
Dynos can be subjective to calibration and other variables such as environment, a card engine age and quality, fuel and much more.
I was always told to take dynos with a pinch of salt as results can vary.
OEM power stats are approximate and could be more or less than stated.
Power values as bragging rights are for kids. What matters is drivability.
I was always told to take dynos with a pinch of salt as results can vary.
OEM power stats are approximate and could be more or less than stated.
Power values as bragging rights are for kids. What matters is drivability.
A
Anonymous
Guest
A few pertinent points...
The power quoted by the manufacturer is the nominal power measured at the crankshaft not driving a gearbox and transmission without alternator /air con etc
Almost all dynos accessible by the public are inertia roller versions that measure power at the rear wheels through accelerating the rollers and then see how quickly the rollers slow down as the car coasts post acceleration..
They then use mathematics to predict what power at the crank would have been taking into account the coast down.
There is an international standard to normalise different dynos ...
As others have stated the only real benefit without lots of other corroborating information is to compare either one engine being tuned or two engines back to back on the same day on the same dyno..
Temperature, humidity, pressure as well as internal calibration factors are all variables that could render figures to be suspect..
Since computer controlled turbo engines arrived it’s very much in the gift of the manufacturer to vary the real bhp figure from the stated one for many reasons..
Also the max power may be affected by the quality of fuel with some engines automatically taking advantage of better quality fuels..
So 351 vs 340 is really in the noise relatively speaking..
The power quoted by the manufacturer is the nominal power measured at the crankshaft not driving a gearbox and transmission without alternator /air con etc
Almost all dynos accessible by the public are inertia roller versions that measure power at the rear wheels through accelerating the rollers and then see how quickly the rollers slow down as the car coasts post acceleration..
They then use mathematics to predict what power at the crank would have been taking into account the coast down.
There is an international standard to normalise different dynos ...
As others have stated the only real benefit without lots of other corroborating information is to compare either one engine being tuned or two engines back to back on the same day on the same dyno..
Temperature, humidity, pressure as well as internal calibration factors are all variables that could render figures to be suspect..
Since computer controlled turbo engines arrived it’s very much in the gift of the manufacturer to vary the real bhp figure from the stated one for many reasons..
Also the max power may be affected by the quality of fuel with some engines automatically taking advantage of better quality fuels..
So 351 vs 340 is really in the noise relatively speaking..
Exactly what I did today Sir.ronk said:buzyg said:I would just enjoy the extra ponies.
Then after a while you would only want more!
I sometimes get tempted but most of the time in the UK I just potter about and do the odd brisk overtake to remind myself just how nippy the car is.
Try to take my 35iS to 7k revs in several gears at least once a week. Do this 'manually' (paddles and/or stick) in Sport+ and the DCT contributes to the performance with the speed of its changes, not least by facilitating accurate use of the rev counter.
Lucky to live where there are roads that enable the car to be used to its performance in its lower gears and nearly in its higher. As a result, know, for example, maximum comfortable cruising with roof down (35mph less than nominal top speed).
In other words, wring the car out regularly. In doing so, find power enough.
Lucky to live where there are roads that enable the car to be used to its performance in its lower gears and nearly in its higher. As a result, know, for example, maximum comfortable cruising with roof down (35mph less than nominal top speed).
In other words, wring the car out regularly. In doing so, find power enough.
I’m afraid I can’t really appreciate the cars higher speed capabilities in the UK - a trip up to the 120mph you suggest then back to 70 doesn’t float my boat. Using the car on the Autobahn however, does generally allow for decent spells of 120mph motoring - when the limits dictate 70/80 it feels like a walking pace.
Just watch out for the odd Brit on the road who still hasn’t learned about lane discipline
(They are there to test your brakes)
Just watch out for the odd Brit on the road who still hasn’t learned about lane discipline
(They are there to test your brakes)Not only heard of him, John, but have driven a 427. And more than round the block.john-e89 said:You ever heard of a guy called Carroll Shelby Buster....??Busterboo said::wink:
Sadly, impossibly expensive now and almost as impractical as a car can be, anyway. Would still love one, though.
p.s. How are your ribs?
Busterboo said:Not only heard of him, John, but have driven a 427. And more than round the block.john-e89 said:You ever heard of a guy called Carroll Shelby Buster....??Busterboo said:
Sadly, impossibly expensive now and almost as impractical as a car can be, anyway. Would still love one, though.
p.s. How are your ribs?
A 427...lucky man...!! I’d imagine a tad scary too though...
Ribs are healing well thanks, still very painful but nothing like on the same level. Scapula is the worst, sooooo sore. Anyway it’s cold turkey weekend, trying to come off the tramadol as I’m hopelessly addicted to the damn things, why anyone would take these chemicals and others for fun is totally beyond me....you’ve got to have something seriously lose in your head to want to stay on this s**t.... :lol:
Press and hold your sport plus button for around 3 sec til a yellow light comes on the dash. Now try your accelaration with the box in sport. The changes are rock solid and super fast, accelaration is mental with no electronic jiggerypokery interfering...Busterboo said:
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