Roosie

iTrader: (8)

Anyone know if noble rollders are accurate or under or over?

I have a rolling road graph for a race car, its not a big bhp figure but but need to see if its in the correct area of power i need, i only ever use Emerald rollers, i have a engine with the printout but dont want to stick it in the car just to get it RR at emerald!

ginner

iTrader: (1)

Pretty good mate my old escos had a msd 340 chip and it made 339 on rollers

wildheart

iTrader: (4)

Only Rollers I will use

testastretta999

Reads slightly under

Roosie

iTrader: (8)

testastretta999 are you comparing it to another printout you have, i now have now choice but to get the engine rr at emerald so i can compare nobles then.

testastretta999

I know the mapping operator of the dyno and he has said of several occasions it reads low, but quite consistant and accurate.

Reads lower than other brands of dyno's. i.e dyno dynamics

Cosworth Lad

+1 mate top guys.

Roosie

iTrader: (8)

Are Sun dynos any good ?

testastretta999

If you look at major vehicle manufacturers they tend to use maha or superflow, think this is because they prove to be more accurate and consistant.

There budgets wil be massive for the installations so you would have to assume they could just buy the best equipment available.

SiZT

Anyone who owns/works using only one dyno will always tell you theirs reads low it's one of the biggest cons in the tuning business

"Yeah mate, this Dyno reads really low. XX% less than *Generic other make*"

Dyno's are comparison tools, there's no way to tell how Nobles reads compared to Emerald

Roosie

iTrader: (8)

i can tell you next week as im having same engine rolling roaded

scoooby slayer

iTrader: (4)

60 to 100 mph doesn't lie there's a good calc online to work out a realistic power figure from weight and iirc 60 to 100 mph. We had a good topic on here about it a while back and ambient temp sensor location can and will make a huge difference to the corrected figure.

scoooby slayer

iTrader: (4)

My old saph ran 442 bhp at nobles and I can tell you for a fact that figure wasn't under as I ran it on a dyno after that I know is generous and it made 472 hp after msd remap 2.2 bar, now what I know for sure is it gained a lot more that 32 hp from the remap.

turnover

Was that on a T3 lol

dodge8283

Is there anywhere that you can go to do 60-100 testing?

scoooby slayer

iTrader: (4)

yep, but it had a 0.63 housing on it fpmsl

was a t4 flat out mate

I can I have a private 1/4 mile road have to watch the farm house at the end though lol

dodge8283

Would be interesting some of the cars that claim more than optimistic figures

Rod-Tarry

60-100 is no way to measure Power. Tyres, Traction, gearing will fudge the results. 30 secs @ 100% wot down a 1.5 mile runway will tell you the truth.

It's Czech Mate

As above gearing will fudge the results of this too

dodge8283

What is your advice then Rod? We all know rolling roads are as much use as a chocolate tea pot. Im fed up of hearing about mk1 frs on standard turbo pushing 360+ etc.

It's Czech Mate

Rods advice is as above, but bizarely, tyres, traction and gearing dont affect that either

dodge8283

Oh I missed that bit lol. Yeah I guess a lot of things factor into it. But it has to stand a better chance than strapping your car down on some of these rolling roads.

scoooby slayer

iTrader: (4)

I think its a very good way, most tuned cars that rev to around 8k should hit 100 mph in 3rd or very close. if a car cant make full traction at 60 mph on a hot day with warm tyres then the cars not set up right for use imo, my supra would full hook in 3rd from 60 mph on the r888s.

it doesn't have to be at brunters to measure power output, a 1/4 mile terminal tells the truth aswell but 60 - 100 is a lot easier to do.

whp, weight and terminal I have a plot that has correlated well to my supra and first r32 pod terminals and power.

Beetlejuice

The question shouldn't be about accuracy - they all read what they read - it should instead be about consistency. A dyno cell that can give repeatable results is a useful tool. One that gives wildly different results each time is completely useless.

scoooby slayer

iTrader: (4)

I totally agree, its still nice to know if the figures are somewhere near correct though.