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[Field Marshal Dr. Opti]

Do all dyno read the same or can the figures be 'massaged'?

Webby's particular example probably throws out the same power and torque as a 1966 Austin Cambridge.......and then there is Mr Bear's bulk to be added to the equation.

[Nick W]

Do all dyno read the same or can the figures be 'massaged'?

No, all dyno operators are straight up, honest, cherry tree growers who would never consider adjusting their results. Never. Not until the customer turns up, at least

[Webby the Bear]

Regarding my bulk I can confirm I have dropped a good stone and half since doing this for a living. However still very much a portly Bear. I blame my over active pie-roid 

Anyways....

If I brought in my remapped 16 plate mustang then I see a benefit from giving me some great stats to talk about down the pub. 

However I'll have a chat to him and basically explain I'm not looking for stats to massage my ego (hardly going to happen with a 16 year old mig) and to tell him I won't be upset if it under performs, just do it honestly and see what we get. 

So having researched it seems to be that 15% for a manual and 25% for auto is the magic figure when comparing BHP and WHP.

[Nick W]

Regarding my bulk I can confirm I have dropped a good stone and half since doing this for a living. However still very much a portly Bear. I blame my over active pie-roid 

So having researched it seems to be that 15% for a manual and 25% for auto is the magic figure when comparing BHP and WHP.

I don't know how much I've lost since I started working again, but my trousers are so much looser I have had to punch new holes in all my belts. It's got to be 3 or 4 kilos.

A 25% loss is a common figure for autos,  which would be about 40hp in this case. I wouldn't expect a modern fully managed engine to be noticeably down on power, even with a lot of miles on it.

[Webby the Bear]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

[YZ250]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

Yes, have they anchored it down securely.     Don't want it flying off the dyno at full tilt. 

Look forward to your findings, whatever the results.   

[Nick W]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

Who gets to clean up the mess if it blows up?

[Doctor Gollum]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

Who gets to clean up the mess if it blows up?

EMD and TMF for encouraging him

[Webby the Bear]

  cheers YZ 

Following the 0-60 thread I've now finally understood it's not only impossible to recreate the conditions of the run but also that different folk at Vauxhall were telling me different things (i.e. One guy told me they do the run two up with x amount of fuel etc. Another said one driver, everything removed to make as light as possible etc. So as you all said (and I should have listened  ) its all 'dangle berries' at best. A made up figure entirely I'm guessing.

Anyways now I have a tangible goal I'm excited.

I don't know how it will work in terms of them locking the tranny. But I presume it won't be in sports mode when they do it as it will always want to kick down? Anyone have an idea how they're going to do it? 

[Webby the Bear]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

Who gets to clean up the mess if it blows up?

If it blows up I'll stick a 3.0 in it. That will put a smile on tb's face at least 

[Webby the Bear]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

Who gets to clean up the mess if it blows up?

If it blows up I'll stick a 3.0 in it. That will put a smile on tb's face at least 

Or save up for a 2016 5.0 v8 'stang 

[Nick W]

I don't know how it will work in terms of them locking the tranny. But I presume it won't be in sports mode when they do it as it will always want to kick down? Anyone have an idea how they're going to do it?

Perhaps they'll move the shifter to 1 so it will stay in first gear?

[Webby the Bear]

I don't know how it will work in terms of them locking the tranny. But I presume it won't be in sports mode when they do it as it will always want to kick down? Anyone have an idea how they're going to do it?

Perhaps they'll move the shifter to 1 so it will stay in first gear?

Oh I thought they had to lock it in fourth?

I don't really know anyway so I'll just wait for them to do it 

[EMD]

Thanks Nick. So doing the maths the 2.5 when new would have produced 127.5 WHP. So this is the magic figure from the dyno.

As I've never had a dyno run done before... is there any questions that would be useful to ask?

Who gets to clean up the mess if it blows up?

EMD and TMF for encouraging him

Ah dont want to see that engine blow up again after the last time id did  I can see it now or should i say hear the squealing of the bottom end when it hits the rev limit

Not heard from Martin for a while steve 

[Webby the Bear]

So I understand that horse power is for top speed. And torque is for acceleration. So what was the original torque of the 2.5? And is this more the figure to look at? Do we expect this to be equal or around equal compared to original torque figure?