65 replies to this topic

[slindborg]

And you know which (supposably) dyno reads correct then

Track and Road in Rainham (essex).
And by luck the 2WD rollers at Jamsport read the same as Track and Road.
Velos used to have accurate rollers, but they closed down years ago.

[Bumblebee]

I just take it all with a pinch of salt tbh, when my car was stage 2 it went on the this rolling road(dastek) and another and they both read the same

[turbobob]

Looks like a good result Aimy.

But wait, its a rolling road dyno.... not a on road dyno. It must be right .......

This just proves charge cooling works, where are the mmg air intercooler dyno plots?

Steve

I haven't disputed a charge cooler working (other than the extra pressure drop / loss) . I have disputed rolling roads. Rolling roads can vary by what 20% ? How is that consistent?

Incindentally there was a 5 bhp drop between 1st and 2nd run.

[slindborg]

technically with RR's you want to benchmark on it, then hope to feck they have the temperature and humidity corrections right, and use that same rollers at every mod delta. But then mostly ignore the actual numbers.

[turbobob]

technically with RR's you want to benchmark on it, then hope to feck they have the temperature and humidity corrections right, and use that same rollers at every mod delta. But then mostly ignore the actual numbers.

Exactly. To say that a RR is the be all and end all is wrong. Too many variables. Keep the same settings and rr will give you an idea of increase. But who's do you use for an 'ACTUAL' figure?

[slindborg]

As said, the three in my last (but one) post.

[Sticky]

Would a hub dyno be more reproduceable?

[turbobob]

As said, the three in my last (but one) post.

Based on what?

[GeorgeBC]

Looks like a good result Aimy.

But wait, its a rolling road dyno.... not a on road dyno. It must be right .......

This just proves charge cooling works, where are the mmg air intercooler dyno plots?

Steve

Ive got rolling road plots with the intercooler on and intake temps don't come into it for a few quick runs with a big blower in the ear.

[turbobob]

That surprises me George. With a rr you do t replicate actual on road conditions. I would have half expected with a rr to see an increase in intake temps.

[GeorgeBC]

Had the car on the dyno plenty of times now at efi in runcorn and temps never went above 45, even after three runs. Its only a short thrash up to the redline so the car gets far worst abuse on the road/track. He's got a really good blower and its a rectangle shape perfect for the turbo ear.

[slindborg]

As said, the three in my last (but one) post.

Based on what?

Based on being in the game and knowing who uses Track and Road....


Hub dynos take out the tyre deformation/heat issue, BUT you still have the transmission heating up etc.

[CHILL Gone DUTCH]

That surprises me George. With a rr you do t replicate actual on road conditions. I would have half expected with a rr to see an increase in intake temps.

I would of thought temPs would be higher on road because engine etc would be under more load

[slindborg]

That surprises me George. With a rr you do t replicate actual on road conditions. I would have half expected with a rr to see an increase in intake temps.

I would of thought temPs would be higher on road because engine etc would be under more load

An RR can load the engine to the max in all conditions (thats what a power run is afterall), whereas on the road its feesable that you cant load the engine to the max based on car weight/gear ratios etc.

[CHILL Gone DUTCH]

That surprises me George. With a rr you do t replicate actual on road conditions. I would have half expected with a rr to see an increase in intake temps.

I would of thought temPs would be higher on road because engine etc would be under more load

An RR can load the engine to the max in all conditions (thats what a power run is afterall), whereas on the road its feesable that you cant load the engine to the max based on car weight/gear ratios etc.

Would cornering loads be the biggest pressure on the engine, if so rr can't replicate this,
Just my own thoughts.

[slindborg]

And just how does going round a corner dictate how much power an engine makes? (I'll be polite this time )

[CHILL Gone DUTCH]

And just how does going round a corner dictate how much power an engine makes? (I'll be polite this time )

Thanks for being polite,
All a learning curve for me,

Would cornering increase engine temps quicker

[slindborg]

well I guess if you just went round roundabouts all day then yes it would get hotter than if you were going in a straight line (or on a rolling road) as the airflow through the rad/engine bay would be shocking to say the least.

[Thealastair34]

And you know which (supposably) dyno reads correct then

Track and Road in Rainham (essex).
And by luck the 2WD rollers at Jamsport read the same as Track and Road.
Velos used to have accurate rollers, but they closed down years ago.

i agree there, i have had all my cars mapped by steve down there top bloke even if it means travelling down the the other end of the country

[Thealastair34]

Yeah Stage 4 but was a bit low on the figures. They never strapped it down and was ran in 5th.


I await for the lol transmission loss comments.

seems strange it was run in 5th normaly run in fourth or what ever gear is 1:1, and as for not strapping down braver than i would be!