To Dyno? Or Not To Dyno?

[Ric]

Originally posted by gsb876

Not sure what that is dude? but you seen the pink jap village rx? possibly running close to 900bhp!!! i reckon that would get over 300bhp on the "maha rolling road thingy".

I think the 900bhp claims for the pink beasty were when it was running NOS too. I don\'t think there are any official dyno figures for it since last rebuild either. I guess since it\'s proud new owner has recently joined our ranks we\'ll get to know how close to 900 bhp it really is sometime!

[gsb876]

Yea good point i did read somewhere about the NOS unsure if its still on though?

[Robertio]

There are a few FDs around that should make over 300bhp, but until now I have not heard of any, for some reason people like taking their cars to places that give high figures  A few years back scoob owners started taking their cars to Power Engineering as it gave higher figures than Powerstation, having looked around it seems G-Force\'s setup reads higher again (possibly the same sort of figures as Well Lane?).

I\'m not going to guess what the pink panther will make, but I\'d be amazed if it does make anywhere near its claimed output (no offense to the new owner intended).

As has been mentioned previously in this thread - different places use different rolling road setups.  Maha is the one used by Star (up here) and Powerstation (Cheltenham) and is not known for giving high figures.

[John Yorke]

Hi Robbie

I would like to refer you to the FDUK rolling road day last year [Feb 15th] where G Force\'s Dyno Dynamics was set up using 2 stock 2000 FD\'s both returned \'stock\' figures [212rwhp] Have a look in May 02 Banzi Mag.
These values were applied to CPL\'s Dyno Dynamics machine for my mapping and power runs which were conducted the same time of the year in similar weather conditions.
I would say my rusults reflect a faily accurate power figure and suggest you inqure at your Maha rolling road what values they are setting thier machine up with.
Regards
John

[Carl]

Whilst I agree with much of your comments Iain/Rich/John,I would have to say that the Dyno Hub is very accurate and kind on the car because of no wheel slip,which as anyone who has dynoed a big HP engine will find,the car can jump about and when you get up the revs it can vary the readings,John\'s car is not really high enough in power for this to happen.Wheelslip comes into play too and tyre wear!The dyno hub has none of this.It is the next best thing to an engine dyno in my opinion,having used both systems.

The power loss to the tyre interface is limited until you get wheel slip(At big hp),so the figure on the rollers will be close to the dyno hub.It is only powertrain losses that really are the difference between rollers/Hub and engine dyno.
Also when you come off the throttle the rollers have alot of momentum in them but the dyno hub does not so it is kinder to the drivetrain.

Since an engine dyno does not fully replicate all of the systems/ancillaries that are running in each car completely accurately,I don\'t think for road cars the owners  are prpared to pay the  high costs involved at this time,nor is it worth it.
No 2 rolling roads will read exactly the same even if the same make,they are only a tool to use to establish that the most HP for the setup is running ok with the tine that has been done.That is not to say they may not be close,but remember that like any tool the wear,the operator(Who has a certain amount of control),and climate can all change the figures.

Even the engine dyno will vary from place to place in HP/Torque figures.

Hope this helps.
Kind regards
Carl

[maximtaylor]

Your absolutely right Carl, hub types are the way to go

but....

To my mind, when FDUK did the G-Force shootout last year, the fact that it was performed on a dyno dynamics tester has kind of set the standard, simply because more FD\'s have figures on this make of tester than any other.

As far as I know, there are two Dyno dynamics equipped centres in Southern England - G Force in Aylesbury and CPL Racing in Sheerness.

The doubters will always have their say if a particular FD performs well on a particular type of dyno.

Do a hub type test and these doubters will say "but it would be less hp on a blah blah blah roller type tester".

The common ground to me is the Dyno Dynamics kit - you may argue that it\'s not the best, but it has that common ground for comparison purposes.

If your not into the mentality of \'mine is better than yours\', then it\'s not an issue!

Regards

Max

[Carl]

Hi Max,
I am not averse to a car that has been tuned on the hub system going to G force after for a power run,as will be soon seen.
That should make for a fair comparison.
Kind regards
Carl

[John Yorke]

I could always do the reverse:bandit

[bobster]

Originally posted by gsb876
Robertio - careful kid i\'m looking for well over 400bhp so if i did decide to come up there you might have to pay!!;)

I feel this is a safe bet for us at STAR...... you are welcome to cry on our sholders. Like most things scottish...they are hard;)

[20B_boy]

Like most things scottish...they are hard

:rollin :rollin :rollin

Isnt there a game of some thing on tomorrow?

[Robertio]

Originally posted by John Yorke
Hi Robbie

I would like to refer you to the FDUK rolling road day last year [Feb 15th] where G Force\'s Dyno Dynamics was set up using 2 stock 2000 FD\'s both returned \'stock\' figures [212rwhp] Have a look in May 02 Banzi Mag.
These values were applied to CPL\'s Dyno Dynamics machine for my mapping and power runs which were conducted the same time of the year in similar weather conditions.
I would say my rusults reflect a faily accurate power figure and suggest you inqure at your Maha rolling road what values they are setting thier machine up with.
Regards
John

Not saying there is anything wrong with G-Force, etc just that according to people on other forums their rollers do read higher than other places.  We\'ll find out when I\'m down for the FDUK day in April

The US FD guys are sure that what they do gives the right figures as well, yet these are about 10% higher than what the other main type of dyno over there records.  And if you compare their figures to those attained in the UK for cars running similar specs there is a huge difference.

The Maha setup is calibrated (IIRC) quarterly by an engineer who comes up and tests them, never been there when this has been done so can\'t say what is involved.  Many cars that are running properly do make stock (UK quoted) figures on them - my scoob made 218.5 when manufacturers claim 218, and most stock scoobs are within a handful of manufacturers figures, as are Evos, Supras.  I was there when Keith Cowies old Skyline made well over 500, and Marcs not setup GTS made over 340 when we were there last time to prove that if the car is making big power, it will be possible to get the numbers on the rollers.  Most (but not all) Jap imports seem to be 10 or so bhp down on claimed figures, which IMHO ties in with the lower quality of fuel used over here.
I did try my hardest to get a good collection of FDs up at the last RR day to get figures for standard cars, but despite my best attempts only 3 FDs made it and the other pair had problems so couldn\'t produce accurate figures.

[20B_boy]

I think the most popular over there is the Dynajet isnt it? Dynamics is meant to be a lot more \'conservative\' than \'jet...

[GaryS]

Originally posted by Robertio
Not saying there is anything wrong with G-Force, etc just that according to people on other forums their rollers do read higher than other places.  We\'ll find out when I\'m down for the FDUK day in April

You get this with evry big test though.

The only thing I could say about G-force being better than PE is that at the latter place you need people to sit in your boot for traction.

As I said earlier, dyno figures can not be compared between two different test centres.  If you use one for tuning, stick to it (as long as you trust the place).  If you want to compare cars, they all must be dynoed at the same time at the same place.

[scooby_si]

either way i can confirm gsb876\'s mota is respectably quick lol
Si

[Roundabout-Now]

The Pink Panther doesn\'t have the NOS anymore, but it is going to be refitted at some point. Just trying to get the traction control off Tim first, so that it can put down the power that it already has.

Dyno test will be done when I get chance (after Pip has finished with it)