Booked the car in for the 13th of this month for a custom map on the Dyno before and after figures see what BHP it makes .Counting the days already

 

post your results I'm considering some modifications myself... :-) and enjoy the drive back!

 

Yes will do with a few pics as well .

 

Arrived yesterday to Viezu HQ very impressed with the high level of customer service total professional in there work so on with the work .K&N performance filters supplied and fitted the map was then written to include the 10% pulley upgrade . First run on the Dyno it made 418bhp once finished 476bhp the drive home was very enjoyable to say the least .

 

Good results!! Enjoy!!

 

nice, good result, do you know what its like for the remap without the pulley?

whats your impression of normal driving vs "testing" the new heavy right shoe ;-)

 

Don't know with out the pulley as I had that done before .I have had remaps on cars before many times but this being the first map written specific to my car before and after power runs to see the improvements .

 

Nice results! Do you have a dyno chart showing power measured in rear wheel horsepower?

 

I did have but with me wanting to drive the car home I left it behind did think it was in the folder with the invoice .The figure was flywheel they said they work on about 10% loss to the wheels if I remember .

 

NEVER go by anyone's "At the Flywheel" as it is merely a guess and could vary by a huge amount. You NEED the At the Wheels results.
Some disreputable dyno guys also change dyno settings such as Altitude and Smoothing to make it appear that there is a larger gain.

 

When you dyno your car you get horsepower at the wheels. In order to convert it to at the flywheel a rule of thumb is add 15 - 20%. You can check this out on line, but it is really just an approximation.

 

Interesting, Viezu's dyno normally shows HP at the rear wheels (my XK8 dyno'd at 225 at the wheels on their rig).

 

That is correct they do this figure was worked out at the flywheel not rear wheels .

 

So, they GUESSED.....

 

'Estimated' would be more correct. The guys at Viezu have a great deal of experience in this area and know well what sort of loss to expect from various types of power trains and transmissions. I can well imagine that their 'guess' would be within 10-15 bhp of the flywheel output. I should also mention, they do some wicked bacon rolls but that has no bearing on my high opinion of them!

James