My car is definately not normal...

[popuptoaster]

the old speedometer vrs stopwatch wont give anything like an accurate figure it simply not precise you may as well pluck a figure out of the air

Agreed, you need to get on drag strip or on some proper timing gear somewhere like Bruntingthorpe, even a sat nav is no good for precise timing as they lag and gradients confuse them.

Just be aware if you take your "fast" car on the drag strip your likely to be seriously embaressed by old VW beetles and Mk1 Escorts.

 

[Uberwagon]

With regards to the DMS re-map.

Have a look at the wheel figures, these are what you need to see. If it's simply flywheel figures then they can do what they want with transmission losses and give you any number they wish.

Dave!

 

[fuzzer]

Neither my Vito (V6 CDI) or SL (5L V8) have traction issues in the wet!

What tyres are you running with? Maybe its the rubber.

 

[GrahamC230K]

u sure it did absolutely nothing? did u dyno it at all to see the difference?

They garaunteed me, that if i dont get minimum 24bhp proven on the before/after dyno, then they wont charge me a penny. thats good enough for me !

Before and after on the same dyno dynamics dyno (albeit a bit of time between the two). I think there was a 1 BHP difference or similar.

Dyno dynamics is the only dyno I trust and the same dyno DMS have. I have personally witnessed two dyno dynamics dynos measure my S4 to within 0.1 BHP of each other, months apart and I am not alone.

I would have been over the moon with a 24BHP increase, so really hope you get it. Shootout mode (make sure the same mode for both runs), same tyre pressures, same gear and you will at least have the proof in fornt of you cant deny that.

 

[Bri957]

Mine's more like 6.0

Is it a 230K badged C36?

 

[BTB 500]

What tyres are you running with? Maybe its the rubber.

Possibly! The Vito still has the factory Continentals on it. The SL had Dunlop SP Sport 2000 Es originally, now Dunlop SP Sport 01 MOs.

 

[maddog]

Dyno dynamics is the only dyno I trust and the same dyno DMS have. I have personally witnessed two dyno dynamics dynos measure my S4 to within 0.1 BHP of each other, months apart and I am not alone.

Well personally i would discount that result immediatly unless the runs were done on the same day or exactly same temperature and humidity as these make a difference or of course unless the car only made 10hp

plus with all rolling road type dynos tyres and tyre pressures can make a big difference i've seen 25hp variations down to tyres

all dyno results should be taken with a pinch of salt imo , as a before and after test of component or modification or as a diagnostic /tuning tool they are useful but shouldnt be taken as the be all and end all

 

[fuzzer]

Possibly! The Vito still has the factory Continentals on it. The SL had Dunlop SP Sport 2000 Es originally, now Dunlop SP Sport 01 MOs.

Ive still got the factory continentals on mine too. Sport contact 2's.

pulled out a sideroad tongiht quite spirited as a pleathora of traffic was coming down the road and i wanted to get home this side of midnight and flashy orange light and then it gripped and woosh

Im putting it down to the cold weather just now , its 2 degrees tonight

 

[BTB 500]

Im putting it down to the cold weather just now , its 2 degrees tonight

I drove the SL 100 miles back from Warwickshire at -8C in Feb. Was expecting it to be a nightmare, but totally drama free!

 

[Adam230K]

Before and after on the same dyno dynamics dyno (albeit a bit of time between the two). I think there was a 1 BHP difference or similar.

Dyno dynamics is the only dyno I trust and the same dyno DMS have. I have personally witnessed two dyno dynamics dynos measure my S4 to within 0.1 BHP of each other, months apart and I am not alone.

I would have been over the moon with a 24BHP increase, so really hope you get it. Shootout mode (make sure the same mode for both runs), same tyre pressures, same gear and you will at least have the proof in fornt of you cant deny that.

hmmm well i'm not quite sure what to do, you've put me off a bit!

I could go through with DMS package, its £500 for the remap and the before/after dyno runs to prove.

But if i go with angel tuning, they wont give me any garauntees or any proof of bhp increase, but promise 15bhp and cost £300.

But surely if they are giving me rwhp figures in shootout mode, same gear, same everything, thats proof enough? especially if i can feel the difference inside the car when i drive it? I think i'll take a mate with me so i have a second opinion about how the car feels...

 

[Dieselman]

A simple test of increased performance is to perform an in gear acceleration on a given piece of road. A stopwatch is all you need for this.

 

[GrahamC230K]

Well personally i would discount that result immediatly unless the runs were done on the same day or exactly same temperature and humidity as these make a difference or of course unless the car only made 10hp

You don't have to believe it, I would never have predicted it, but that is what I experienced. I know of someone else who did similar and was within 1BHP. Again only on a dynodynamics in my experience. I am not sure teh is anything to discount. I am talking about two valid figures that happen to be within 0.1 BHP of each other.

hmmm well i'm not quite sure what to do, you've put me off a bit!

I could go through with DMS package, its £500 for the remap and the before/after dyno runs to prove.

But if i go with angel tuning, they wont give me any garauntees or any proof of bhp increase, but promise 15bhp and cost £300.

But surely if they are giving me rwhp figures in shootout mode, same gear, same everything, thats proof enough? especially if i can feel the difference inside the car when i drive it? I think i'll take a mate with me so i have a second opinion about how the car feels...

Go DMS, just be strict you see the before and after and be prepared to have the car restored to as it was and walk away (well drive hopefully).

 

[maddog]

You don't have to believe it, I would never have predicted it, but that is what I experienced. I know of someone else who did similar and was within 1BHP. Again only on a dynodynamics in my experience. I am not sure teh is anything to discount. I am talking about two valid figures that happen to be within 0.1 BHP of each other.

Sorry mate they cant be valid AND one tenth of one horsepower different

Whats an S4 ?? 340hp ish?? thats over 99.9% accurate, there is no dyno that is that accurate or consistant certainly not a rolling road type

1 or 2 hp on the average car or 99% i can believe but not one tenth of one pony and certainly not on a car with over 300hp

in fact dyno dynamics claims accuracy with +-1%

http://www.dyno.com.au/dyno/controller/products/showTANDEMTBDTPage

 

[Dieselman]

That doesn't mean it couldn't happen, just that it's probably not repeatable.

 

[Peterdon]

you will probably find there are dieselseek: ) which could outperform it... Such is technological progress.

Top Gear last night There are electric cars that can outperform it

 

[GrahamC230K]

Sorry mate they cant be valid AND one tenth of one horsepower different

Whats an S4 ?? 340hp ish?? thats over 99.9% accurate, there is no dyno that is that accurate or consistant certainly not a rolling road type

1 or 2 hp on the average car or 99% i can believe but not one tenth of one pony and certainly not on a car with over 300hp

I can't agree with that. All I have expereinced, expereinces I have shared and all I have read say different, ONLY re dyno dynamics. Any other inertia style dyno I couldn't agree more.

 

[maddog]

That doesn't mean it couldn't happen, just that it's probably not repeatable.

Yes, in the same way a stopped clock is right twice a day.

These machines are simply not that accurate they cant read within 1 tenth of 1 percent consistantly and if they could a car strapped to a chassis dyno is not capable of providing such consistant results due to atmospheric conditions etc etc

To get results that consistant is little more than pure luck and shouldnt be interpreted as an accurate result

 

[maddog]

Top Gear last night There are electric cars that can outperform it

oh yes

http://uk.youtube.com/watch?v=3dRpAZci9m0

 

[GrahamC230K]

Yes, in the same way a stopped clock is right twice a day.

These machines are simply not that accurate they cant read within 1 tenth of 1 percent consistantly and if they could a car strapped to a chassis dyno is not capable of providing such consistant results due to atmospheric conditions etc etc

To get results that consistant is little more than pure luck and shouldnt be interpreted as an accurate result

I think you are pushing a point which really is not relevant. The OP is having a before and after on a Dyno Dynamics dyno. My point is this is ideal as I find these adequately accurate enough for the test. So much so that I have seen them to within 0.1 BHP. You might not and probably will not see this all the time, but to within 1, 2, 3 BHP is great for comparisons.

Results on the day with a before and after will be tricker as repeated runs and heat soak are a different story and you will most likely only see a downward turn.

 

[UnMarked]

oh yes

http://uk.youtube.com/watch?v=3dRpAZci9m0

.....and I bet I'm not the only bloke on here who gets distracted by the 'best bottle opener ever' link on the related thread list on the right of the clip!!

(sorry hun )