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Re: Megabusa cooling issues
by Bob Mortimer
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Hi Steve,
I suspect the sensor/calibration is to blame and that you aren't really seeing
113 degrees. I'm also using a Polo rad with the Davies Craig EWP on my Busa
engined Fury and even racing on a warm day am not seeing more than about 93
degrees water temp. Oil temp gets to mid-90's (also dry sumped).
HTH,
Bob
On Friday 26 Jun 2009 09:26:12 steve169548 wrote:
> I have built a Megabusa and have covered approx 300 miles in now and seem
> to be having cooling issues.
>
> I have used the SBD/Nova Racing dry sump which means I have to run a
> electric water pump as the scavenge pump is driven from the original water
> pump take off.
>
> Initially I was using the Westfield supplied VDO sensors with the Race
> Technology Digidash but had really odd readings for oil pressure,water temp
> and fuel level.This turned out to be the calibration file supplied by
> Westfield(they admitted it was mainly guesswork!!)
>
> I have now swapped over to the Race Technology recommended Bosch sensors
> and it seems a lot better. I used the car on Saturday and went round the
> M25 to Cobham Proving Ground (a 30 mile trip) and whilst I was on the
> motorway the temps crept up to 113 degs.This was just cruising at 70 mph
> and pulling 6000 rpm. I have swopped the cooling fan switch for one that
> comes on at a lower temperature and have been all round the car witha
> infrared temp gun trying to check to see if I really am seeing such high
> temps but obviously I am only measuring the temp of the component not the
> actual coolant level.
>
> In all this checking/testing the car has not boiled over ever,the highest
> oil temp has never exceeded 100 degs.
>
> I am at a loss what to do next other than spend even more money and get the
> RadTec radiator they make which is a direct replacement for ther existing
> Polo rad.
>
> Just to add some more info I was using the Davies Craig Digital water pump
> controller but have bypassed this now and the pump is running constantly.
>
> Any suggestions please as I have a driving day booked at North Weald on
> July 10th.
I suspect the sensor/calibration is to blame and that you aren't really seeing
113 degrees. I'm also using a Polo rad with the Davies Craig EWP on my Busa
engined Fury and even racing on a warm day am not seeing more than about 93
degrees water temp. Oil temp gets to mid-90's (also dry sumped).
HTH,
Bob
On Friday 26 Jun 2009 09:26:12 steve169548 wrote:
> I have built a Megabusa and have covered approx 300 miles in now and seem
> to be having cooling issues.
>
> I have used the SBD/Nova Racing dry sump which means I have to run a
> electric water pump as the scavenge pump is driven from the original water
> pump take off.
>
> Initially I was using the Westfield supplied VDO sensors with the Race
> Technology Digidash but had really odd readings for oil pressure,water temp
> and fuel level.This turned out to be the calibration file supplied by
> Westfield(they admitted it was mainly guesswork!!)
>
> I have now swapped over to the Race Technology recommended Bosch sensors
> and it seems a lot better. I used the car on Saturday and went round the
> M25 to Cobham Proving Ground (a 30 mile trip) and whilst I was on the
> motorway the temps crept up to 113 degs.This was just cruising at 70 mph
> and pulling 6000 rpm. I have swopped the cooling fan switch for one that
> comes on at a lower temperature and have been all round the car witha
> infrared temp gun trying to check to see if I really am seeing such high
> temps but obviously I am only measuring the temp of the component not the
> actual coolant level.
>
> In all this checking/testing the car has not boiled over ever,the highest
> oil temp has never exceeded 100 degs.
>
> I am at a loss what to do next other than spend even more money and get the
> RadTec radiator they make which is a direct replacement for ther existing
> Polo rad.
>
> Just to add some more info I was using the Davies Craig Digital water pump
> controller but have bypassed this now and the pump is running constantly.
>
> Any suggestions please as I have a driving day booked at North Weald on
> July 10th.
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