Hilltop remap on my R12RT WC - the results

er-minio said:
So you increased top power (by more than 10bhp) and torque all over the range at the same time, without any changes to the fuel consumption as well.
What type of sorcery is this? :D


Even better.
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In use - Just because an engine is capable of producing 100bhp at 5,000 revs - does not mean that it actually IS producing that power.

The fuel consumed is proportional to the bhp produced, not capable of being produced.


(think of an engine revving in neutral...............)

Al:rolleyes:
 
Had my GS done last year. Much smoother. 55 mpg every tank. Feels like an eager puppy. 2nd bike i've had done by Geoff - so got £100.00 discount..
 
cookie said:
...if you ignore that the manufacturers measure at the crank and hilltop at the back wheel.
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But BMW don't actually claim that their power figures are at the crank, or rear wheel in any of their brochures, or on their website.
 
Engineer said:
Why don't BMW run the 'correct ratio' ?
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Probably because all manufacturers of motor vehicles have to compromise between the "best" set up and enviromental and other legislation... That is why even with all the advancements in engine design and FI technology, engines still feel less than perfect...
 
Yes, that.
Boxers run extremely lean.

By the way, Blackal, I know it is not an electric engine. Also fuel consumption "tests" done on the road or read from the onboard computer might be biased/not accurate, so I was joking about that.

What I am skeptical about is a 16bhp increase just adjusting the fuel mixture and not doing anything on the engine itself.
 
If the engines run 'extremely lean' then how does it give better MPG ?

Mmmmm, this doesn't add up.
 
'What I am skeptical about is a 16bhp increase just adjusting the fuel mixture and not doing anything on the engine itself'.

When it boils down to it, don't most types of engine tuning involve adjusting the fuel mixture in one way or another whether it is done mechanically or electronically, changing pistons to raise the compression to get more fuel in and compress it tighter, fitting larger valves to get more fuel in, changing the valve overlap to get more fuel in, modifying inlet and exhaust ports to get more fuel in..and out, Or using Turbochargers, Superchargers etc.

It's all about the fuel..energy cannot be created or destroyed, just converted. The fuel is the energy, the motor is used to extract as much energy as possible out of the fuel and put it into the rear tyre.

So modifying an engine to get more fuel (energy) into the combustion chamber and to burn every drop of it efficiently and to extract all of the energy out of that fuel is the way to get more power...isn't it?
 
busy builder said:
If the engines run 'extremely lean' then how does it give better MPG ?

Mmmmm, this doesn't add up.
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What batman said....plus.

Without getting too technical.... A lean burning engine will run very hot, causing tolerances to decreas, basically tightening the engine and causing more friction.

Adding the correct fuel mixture reduces engine temp.
Therefore keeping the engine loose, so more HP and economy.
 
Martyn H said:
The ever tighter demands of emission control legislation.
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So making it run at the correct ratio or richer means increased emissions?
Is there any other legislation that compromises the correct ratio?
 
Engineer said:
So making it run at the correct ratio or richer means increased emissions?
Is there any other legislation that compromises the correct ratio?
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When i get chance i will pop into my friendly bike garage and get them to check the emmissions on my de catted yoshimura'd and re mapped GSA is producing and see if it is within the parameters of emmissions for the RFL i pay
 
Engineer said:
Why don't BMW run the 'correct ratio' ?
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As has been mentioned , it emissions regulations, the ideal stoichmetric 14.7-1 fuel air mix is rarely achieved, normally aspirated engines run nearer 13-1 ,to avoid high combustion temperatures,
Some car manufacturers including vw were running direct injected petrol engines at lambda 2 , 16-1,,which ran better on super unleaded, wilth big cooling galleries around the valves, it was programmed out gradually due to poor running complaints not unlike the ones we are finding, not to mention the NOX emissions caused by high temps,
Engine longevity is becoming secondary due to regulation, we are spraying urine into diesel exhausts to reduce NOX called ad blu,,
So hilltop is more than extra power and 16 hp is possibly a measure of how stifled modern engines are,
 
I have emailed Geoff, Aiming to get ny GSLC done later in May as not in the uk until 16 th, too many positive results to ignore,
 
I've also just had my Ducati tuned by Geoff, with good results.
Even though my bike already has a Ducati performance Race Ecu. Geoff still managed to improve performance and smooth out the power and torque curves.
 
redrick said:
When i get chance i will pop into my friendly bike garage and get them to check the emmissions on my de catted yoshimura'd and re mapped GSA is producing and see if it is within the parameters of emmissions for the RFL i pay
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It would be good know if it meets Euro 3, 4 or whatever BMW claim. It is of course possible that BMW go for a higher rating than the one required in the Europe so that it is ready for the next level of emissions requirements. If they have gone for a higher rating than the current legislation requires in some jurisdictions then it may be possible to re-map and stay within some countries requirements but not others.

My guess is that it is emissions only that drive this lean running requirement so if you re-map then emissions must increase so really one needs to do a before and after test to make proper sense of it all.
 
Engineer said:
It would be good know if it meets Euro 3, 4 or whatever BMW claim. It is of course possible that BMW go for a higher rating than the one required in the Europe so that it is ready for the next level of emissions requirements. If they have gone for a higher rating than the current legislation requires in some jurisdictions then it may be possible to re-map and stay within some countries requirements but not others.

My guess is that it is emissions only that drive this lean running requirement so if you re-map then emissions must increase so really one needs to do a before and after test to make proper sense of it all.
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On the other thread you were going to email, or was it phone, Geoff at Hilltop to discuss just this (along with a few other queries you had)? I'm sure I read several posts where you said you were going to do that?

Anyway, I digress, what did you manage to find out, what did Geoff say?

Andres
 
Outtomunch said:
On the other thread you were going to email, or was it phone, Geoff at Hilltop to discuss just this (along with a few other queries you had)? I'm sure I read several posts where you said you were going to do that?

Anyway, I digress, what did you manage to find out, what did Geoff say?

Andres
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And you called me a bad man :D:D
 
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