D Day this Wednesday. (Read 3,120 times)

[macca]

'D' being short for Dyno. I'm fortunate to have a very good engineer and friend on the 99a Super saloon team . He is one of the Engineering Tutors at Northlands NorthTec , where he trains various levels of some of our next generation engineers.

Over the last few weeks some work has been carried out making up two hub adapters to get attached a super saloons wide 5 hub to the hub dyno machines along with other prep within the institute.

Has anyone out there had any Dyno time on one of these Hub Dyno Machines in the past? It's meant to be good for 800 Hp.

[bigsparknz]

What would you like to know Shane have used that style of dyno a couple of times.

[busterbell]

would that give a true reading thou, i would have thought you would have needed resistance to give a more accurate picture??

[bigsparknz]

they do give resistace actually a very good dyno plus gives you true reading of hp at the wheels. plus you dynoing a motor how its setup in the car so will be how its raced

[macca]

Did Stu's super go on one Brian?

I guess firstly, are they hard on the drive train ? I'll be in the seat , so I understand I've got a lot to do with that ;D.

2, How does this type of dyno compare to , an engine dyno and then a rolling dyno.

3, How much power is eaten up through the bert, shafts and diff?

4, Are these machines accurate verses the other types?

[busterbell]

i dont know much about them, just asking out of curiousity more than anything. i get that it would give a hp figure, but isnt that mostly irrelevant??
unless i guess if the more power you can make, does that equal the better the motor is performing??
which is where i get back to my first question, i am figuring a engine is goin to perform differently under load.

[extra]

A hub dyno would be more acurate as there is no wheel spin like on the rollers.

[busterbell]

but there is plenty of wheelspin on the track, so how is that helpful??

[extra]

well yea true but if you were after a maximum reading with less interferance a hub dyno would be the way.im just not sure how much power you can put throuhg them.

[macca]

Aug 10, 2009 19:37:04 GMT 12 busterbell said:

but there is plenty of wheelspin on the track, so how is that helpful??

I've just gotten off the phone with Brian ( bigspark ). Apparently you can simulate coming off the corner ( loaded up ) and then adjust the resistance to gain rpm . Making it very tunable . TC has been know en to have had his car on one of these machines so I guess the speaks for itself.

[Jesel]

BE VERY CAREFUL MANY ENGINES HAVE DIED ON DYNOS

[macca]

Well aware of that.

[nzf2stocks.]

Better on the Dyno than on the track. They get much more stress on the track than on the dyno where the load is constant and can be regulated.

[macca]

Yep. I would have thought that too. And don't need to be on the loud peddle overly long .

[mrrx]

be realy good to know how you get on as mine is going on a rolling road in chch when we get it going ray stewart would be in the know as his car has been on one

[macca]

So are you saying that Ray's hissin nissan has been on a hub dyno?

[mrrx]

rollig road i think was a conversation i had a while ago but im sure he would help if asked

[nogrip-31gm]

the thing to be aware of is people expect the car to be quick straight out of the block after being on a dyno....but forget about set up..

same principles for street cars..no point having the go power when you cant use it properly.. thats why they should ban fwd

[busterbell]

well there is no point being all proud of high hp figures if you dont bother to get it to transfer to where it counts.

[Dirt_Fan]

engine dyno would be good to know hp at motor but like you said macca some may be lost through the gearbox shaft etc so a hub or rolling road will give you a at the wheels hp which I guess would be a better figure to work with at the track setting the car up