Looked at the bottom off my graph that my Focus RS did and have the following.

bp..100.9 rh..62 at..16 it..17 rr..015 tn..4.511


If this is any good to anyone, would like to know what it means though!

 

what we need is for one of westons guys to post here
just to clarify things regarding all the posts about this day


steve

 

yeah that sounds like a good idea mate cause i havnt got a clue what it all means.

 

If that was the fan on the scoop then its far too small, given that assumption then oem ecu's would be pulling ignition and adding fuel to compensate for high charge temps. Anyone actually have a temp sensor in their intercooler or just after ?

rentanone ...

bp = barometric pressure
rh = relative humidity
at = air temperature
it = intake temperature (should be adjacent to airbox or induction)
TN = transmission
can't recall what RR is.

 

Steve....... sent them an email sunday night with a few questions,but no reply so far

Bob..... it seems that a lot of the cars that ran had the same transmission calculation inputted...... uk,import wrx,P1,and a two wheel drive focus RS............ very strange for that to happen dont you think?..... charge temps were ok according to my probe after the intercooler so i think the cooling was adequate.

martin

 

ive got a charge air temp in my throttle body and it stayed very low, i was supprised, it actually stayed lower than on the road, it was freezzing in the roller room and the fan seemed very powerfull, it was ten times better that the bromsgrove rolling road.

 

apart from the strange results

 

is anyone up for arranging another rolling road? somewhere like powerstation?

 

Im up for it, Would be nice to compare my RS results with my old scooby that was rolling roaded there.

 

Well i received a reply from weston about the cars results that day,basicly a sales pitch on why roller mapping is better than road mapping and only gets slagged off because road mapppers cant aford a dyno!!.... asked a few questions regarding the similar figures at the bottom of the print outs that everyone has,why the cars were tested in 3rd and not 4th and why so many cars were well below expected figures..... we shall see if i get a reply to that one or not.

 

i,d be up for that ! just had some work done at zen so would be interesting to see what i make.

 

Hopefully enough to counter act the ugly nature of the car maz

 

I'd be up for PS..

Ran there last year at their open day with mapped TD04 so it would be interesting to see how the VF35 compares.

Their power figs seem to be one of the most realistic..

 

what is the spec of your car mate? im running a vf35 too at 1.25bar it got 310.5 bhp at powerstation about 9 months ago and a crappy 282bhp at weston performance last week, it will be interesting to see what it gets back at powerstation again.... james

 

ha ha ! at least mine isnt an estate ! .

 

Hatchback you dick and anyone will tell you its far better looking than the hawkeye

 

whats a hawkeye?

 

06 model james with the very strange front end with the 3 piece grille....... makes a bugeye look good lol

 

is that a bite ?

 

with a wink included in the reposte ?

and look at post 108 ha ha

 

aarrrrr, cheers mate

 

Usual mods (inc STI TMIC/scoop/splitter) only my VF35 runs at 1.4+ (by 3200) holding 1.3 @6k. When Bob mapped it we did a DD run that produced 340x330 so that would be interesting to compare.

It won;t be a completely accurate comparison to my previous PS visit due to the time difference (ie summer v autumn) but I do rate PS as one of the better/accurate dynos..

Hows this coming along, anyone contacted PS yet..?

 

no mate i havnt contacted them yet cause i want to get my map tweeked first and my mate wants his car remapping by them too,would you be happy with the start of january?

 

Yea, that would be ok by me..

Any idea of cost..?

Didn't cost anything last time as they had an open day after installing the new dyno & cell..

 

not sure bout price but i,ll ring up and find out monday.

 

That's not good !!

by the way it's:-
£30 inc vat for 15 cars or more (a max of 30 cars) @ PS

It was only free because it was an open day.

Andy

 

Hello my name is Greg Gush I am the engineer who operates the rolling road at Weston Performance.

I understand there may have been a phew people unhappy with some of the results from the rolling road day hosted by ourselves on the 29th of October.

I would like to take this opportunity to answer some of the questions posted here.

Before I do I would like to take this opportunity to say thanks to Rentonone for organizing the day and to all of the positive people who attended.

First issue

Bp = barometric pressure
Rh = relative humidity
At = ambient air temperature
It = intake air temperature
Rr = ramp rate

TN DOES NOT = TRANSMISSION

Tn = A figure used by the dyno as number for its own inertia value

This value for our dyno which is an AWD twin rear retarder dyno dynamics rolling road = 4.511
A single rear retarder AWD dyno dynamics rolling road has a value of 3.454

The TN number is for the particular dyno and not the vehicle being tested on it.

For a tuner to make the assumption that TN is some kind of gearing calculation smacks of an amount of inexperience in using a Dyno Dynamics rolling road.

There were a phew other good posts on this subject but these two are my particular favorites
Shown in order of appearance

Second issue

Vehicles tested in 3rd gear not 4th.

As stated by dyno dynamics to gain an accurate flywheel figure on the rolling road the vehicle must be driven in the gear where maximum power can be achieved between the speeds of 60 and 100 MPH for most high performance road cars this is 3rd gear.

Most of the vehicles on the day were tested in this speed range and hence 3rd gear.

As WRX Rich asked me to test his in 4th as well as 3rd, I did and actually recorded a few bhp lower in 4th.


Third issue

Charge temperatures and cell cooling

The cell we have built here at Weston performance has four radial fans extracting air at the rear of the cell behind the plenum, these in total flow 52000 cfm through an 8.5m square area in the front half of the roof of the cell pulling air across the vehicle and dyno at 4 meters per second.

The large open frontal area allows for a high volume of air to travel through the cell without causing a pressure drop/vacuum. I believe this to be the highest flowing rolling road cell excluding vehicle manufacturers in Europe.

To relieve heat from the radiator and intercooler and exhaust of the vehicle we have a further 25000cfm fans that are placed directly in front of the tested vehicle and blow air at the radiator and intercooler at 25 meters per second.

I think the questions on charge temperature were only asked by people who did not attend the rolling road day, as I believe everybody there would agree the air flow was very good.

I have various other tuners race teams and products manufacturers come to use this dyno cell because of its large cooling capabilities and complete repeatability.

For this reason I myself and various other tuners and products companies have done lots of back to back testing between on road and in dyno cell charge temps and for a well specified vehicle the charge temps in the cell are always within 3 or 4 degrees Celsius of the road temperatures.


I feel this has answered the main questions regarding this rolling road day, for any further information or if anyone requires any other results from there dyno run i.e. wheel power, boost or torque please call Weston Performance on: 01217092300 or better still just pop in for a chat.

Cheers

Greg Gush

 

Thanks for the reply to my e-mail Martin (rigga) you have helped raise some good questions regarding the rolling day here at Weston Performance.

I have endeavored to answer these questions in the post above.

Your vehicle did not make the expected power figure and you are obviously concerned with this.

However in your e-mails and posts on the forum you have made a few points that maybe you could clarify.

Why would you post something like this?

Im sorry if the e-mail I sent you sounded like a sales pitch as after all it was a reply to a sales enquiry by yourself

Part of initial e-mail sent to Weston Performance

In your next e-mail to us you go on to say

How many is a lot of cars and which ones were these?

Which rolling road and do you have any graphs to proves these figures?

Cheers

Greg

 

Greg..... am off to work very shortly so shall be breif with this

My mail to yourselve swas indeed asking about mapping the car as you stated after my power run that you could gain the extra power i felt my car should be makingt the spec its running,your responce did indeed sound very derogatory regarding road mappers and seemed to infer theire work would be inferior to yours doneon a dyno dynamics rolling road...... the cars that were felt to be low on power were mine,rentonone,si's with the recently built 2.5 with 20g turbo and i think he p1 that was run was also lower than expected.there may be others that might want to add their thoughts to this also,i have no doubt you have spent an awefull ammount of money on the tuning facilities at weston,and i thought it was a well run event too...... there just seems to be difference of opinion regarding the power runs and esp the fuel rich mixture results that most imprezas seemed to be suffering from to loose power..... none of the mappers that did the cars i think would leave them in that state,so it begs the question can a rolling road truely replicate road running conditions?

the cars that i have seen running before and making more power was at a chipped uk rolling road day earlier in the year,i have no print outs prsonally,no do i know the make and type of rolling road it was,i did not run my car that day as it was pre modded,but i was present when the cars ran

martin

 

And since your quoting sections of emails onto a bbs ill do the same with the reply you sent to my original mail to yourselves

"We can tune your car to run safe with better fuelling and make more power on the dyno and this will be consistent with the road.

I tend to find that anyone who knocks dyno mapping in general, cant afford one and needs to put them down to generate work for the far inferior method of road mapping.

I also know various road tuners who are looking at purchasing dyno's as they are more accurate to tune on"



as for the last point this topic is interesting reading

https://www.scoobynet.com/general-te...ling-road.html




martin