Hi guys

It's probably a bit of a contentious subject, but I've checked with a few tuners and they swear it's true.
They say that Dyno results in the USA and UK are generally different. They say that the results in the USA are massively inflated.
They claim that if you have a US car with 500whp....take it to the UK and dyno it, it'll more than likely be closer to 350whp.

Is there any truth to this?

 

Considering that "horsepower" doesn't have a fixed calculation (aside from equaling torque at 5252 RPM), regardless of what country you're in, different dynos will give different readings. Doing the pull in different gears will also give different results. That much of a difference, though? I doubt it. It sounds like someone's giving you half the story to blow smoke up your ***.

 

Yeah, it's hard to know what the truth is.
I've heard the same story from different tuners.
Could be that they lack the skill to get a stock block to the power that you guys get in the states.

 

It could be any number of things. Given that you can find anything on the internet, I doubt it's just a competency issue across the ocean. It's not like you suddenly become an idiot just because you're in a different country It may also have something to do with fuel availability. The guys running 500 WHP on a stock block are running E85 (or better), and if you can't get that or something similar over there, then yeah, you won't see reliable, daily driven 500 WHP stock block cars. Different people also have different definitions of "stock block". Some (the correct ones) say that stock block is just the block itself. A forged rotating assembly is still a "stock block". There are some people that think stock block means stock longblock, which yeah, that'll limit you.

 

keep in mind that dyno results are just numbers given various conditions that can be beyond your control. temperature, humidity, barometric pressure, altitude, just to rattle off a few. its just a statement that my car making about 500 at the flywheel close to sea level would not do so in colorado. depending on where in the uk you are, they may be at a different altitude which will affect the numbers....also, there are differences between what dynos are used as well..

 

The big difference between Europe and the USA is just the fuel. We are running RON octane and in the USA MON octane. Here you can see the difference:



In Europe the most common maximum spec regular fuel is 98RON. In Germany it's 100RON and in some countries E85.

 

no, the US is Ron+Mon/2, not straight M

 

Yes, here in the states we use both the research and motor octane methods divided by two. To add to that I could have swore E70 - E85 was more like 100 - 106 octane using the (R+M)/2 method.

I need to get gas later today, I can take a picture if needed while I am there if needed.

 

Ah ok! Then TS has a point, I also see here in Europe setups with the same specifications make a way less power then in the USA.

 

This isn't the first time I've heard this, too, which makes me wonder. The last guy I remember hearing something similar from was saying that every tuner he talked to wouldn't go past 350, no matter how built the motor was.

Maybe European tuners are just ***** bitches?

 

 

Europoor*

 

also remember that most european countries typically have much more stringent inspections for vehicle registrations, especially places like the UK.

 

Our inspections aren't that bad.The car has to have a full check over every year,emissions testing etc we call it an MOT test but if you find a friendly guy you can get anything through.Plenty of 700+hp street Hondas around here tuners not wanting to go past 350whp is bullshit

 

There is a different since Us uses fot pounds for torque and Europeans uses Newton meter. There is a difference but not much.. I think it is something like 1,5 %
Torque times RPM and some factor is HP.

But I agree the common US way of making business is not the same as in most European countries and somehow HP usually flys away at sea in shipping in a most mysterious way.

 

So if us Americans inflate our numbers so severely, then how do you explain quarter mile calculations being on point?

 

Ever stop to say "Who gives a **** about a number?"

If the car is fast, it's fast. The dyno is a tuning tool to compare gains and losses.

 

 

 

This!!!! bollocks to the dyno numbers, the cars in the states are still trapping a whole lot faster than the quickest cars in the UK

 

You do your investigation on information on different fora. But it's a bit difficult if there are some unexplanable differents.