New engine down on power
Discussion
Just a thought for what's it worth. A session on a rolling road dynamometer might through some light on the problem, if you can get access to one. This would help to estimate just how much down in power you actually are ( if at all).
Hope you get it sorted and let us know more about the problem and answer !
Hope you get it sorted and let us know more about the problem and answer !
Throughout the race? or only when the engine gets hot, for example?
Also, slower compared to what? your own data at the same circuit in the same conditions?
Lots of variables.
My Dad had a disappointing season in R300s with a Duratec engine many years ago, it turned out that the oil pickup pipe was too close to the bottom of the sump. Once the engine was hot, the top end would get starved of oil and it'd go slow until it cooled down again.
Also, slower compared to what? your own data at the same circuit in the same conditions?
Lots of variables.
My Dad had a disappointing season in R300s with a Duratec engine many years ago, it turned out that the oil pickup pipe was too close to the bottom of the sump. Once the engine was hot, the top end would get starved of oil and it'd go slow until it cooled down again.
In terms of power, there very little internally with the Duratec that can go wrong with a brand new factory engine apart from perhaps the cam timing. If it is a rebuilt or secondhand engine, then there's potential for all sorts of things from bent valves, poor cam clearances, to simply being worn out. It's also worth looking at why the last engine failed and check the mapping, induction, and exhaust.
HustleRussell said:
My Dad had a disappointing season in R300s with a Duratec engine many years ago, it turned out that the oil pickup pipe was too close to the bottom of the sump. Once the engine was hot, the top end would get starved of oil and it'd go slow until it cooled down again.
Neither your Dad's R300 or the posters 420R have an oil pickup pipe.DCL said:
In terms of power, there very little internally with the Duratec that can go wrong with a brand new factory engine apart from perhaps the cam timing. If it is a rebuilt or secondhand engine, then there's potential for all sorts of things from bent valves, poor cam clearances, to simply being worn out. It's also worth looking at why the last engine failed and check the mapping, induction, and exhaust.
Hi thanks for the reply, the engine is new direct from Caterham, how can I check the timing? Is there anything else I should be thinking about? Roblot said:
Just a thought for what's it worth. A session on a rolling road dynamometer might through some light on the problem, if you can get access to one. This would help to estimate just how much down in power you actually are ( if at all).
Hope you get it sorted and let us know more about the problem and answer !
Hi,Hope you get it sorted and let us know more about the problem and answer !
Thanks for your reply, I run the car in Malaysia so not really much like that about (that you can trust) I just know that in the speed traps other cars are quicker but I am doing a fast overall lap time, compared some rpm data and I'm quicker onto the straight but just drops off. I feel it after 5000 rpm really
sfaulds said:
HustleRussell said:
My Dad had a disappointing season in R300s with a Duratec engine many years ago, it turned out that the oil pickup pipe was too close to the bottom of the sump. Once the engine was hot, the top end would get starved of oil and it'd go slow until it cooled down again.
Neither your Dad's R300 or the posters 420R have an oil pickup pipe.HustleRussell said:
Throughout the race? or only when the engine gets hot, for example?
Also, slower compared to what? your own data at the same circuit in the same conditions?
Lots of variables.
My Dad had a disappointing season in R300s with a Duratec engine many years ago, it turned out that the oil pickup pipe was too close to the bottom of the sump. Once the engine was hot, the top end would get starved of oil and it'd go slow until it cooled down again.
Hi, Also, slower compared to what? your own data at the same circuit in the same conditions?
Lots of variables.
My Dad had a disappointing season in R300s with a Duratec engine many years ago, it turned out that the oil pickup pipe was too close to the bottom of the sump. Once the engine was hot, the top end would get starved of oil and it'd go slow until it cooled down again.
Thanks for your reply, yes from the start engine is not running hot I think, must admit I can't be totally sure because I use it in Malaysia and it is always 34 degrees air temp!
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