Dyno Day @ Speedworks 8/12/02

[rob77]

Anyone know how to convert PS into HP? I'm sure 280PS is 208Kw (I think). Anyway, just got back from the dyno day held at Speedworks and organised by the All 4 Wheels Car Club. Managed to pull 273.5PS @ 6608rpm on the rear wheels, using Speedworks new DynaPak dyno. The one where you unbolt your wheels and attach the dyno, meant to be extremely accurate. I duno where the ladies came from, but attached is a photo

[phat25t]

DAYYYYYAM!

:Pres-hit:

ps: and by tha way well done with tha dyno result

stevo

[rob77]

BTW: I forgot to say:

Big Thanks go to Ivan and crew @ Speedworks for their help with my car and the dyno. And a Big Thanks goes to Brody from All 4 Wheels car club for organsing the day. And if anyone wants the full size pic of those chicks pm me your email address and I'll send it (its about 1.2mb)

[JH32]

To convert kW to HP, times by 1.341

To convert kW to PS, times by 1.36

So 280PS is 206kW

And 273.5PS is 201kW

Which I would have thought was bloody good for the mods you've done

edit: well done by the way

[skyzerr33]

that works out to be about 270rwhp

good numbers dude but its gonna ruin any of your why didn't i run a 13sec 1/4 arguements as u have plenty grunt according to that figure.

[skyzerr33]

ps

the chicks are the all 4 wheels promm girls

check there site

[Hicks]

That seems a pretty high reading, Ivan was telling me on wednesday that its deadly acurate though. But I pulled 260 on barries and I thought that was pretty high. And im running quite a bit more boost and an S-AFC.

[rob77]

Originally posted by skyzerr33

that works out to be about 270rwhp

good numbers dude but its gonna ruin any of your why didn't i run a 13sec 1/4 arguements as u have plenty grunt according to that figure.

True. But i still think i can run a 13.*something* i want to start playing with my tyre pressures.

[Hicks]

Hey Rob, whats that cradle kit you have?

Whats it do??

[skyzerr33]

Originally posted by rob77

True. But i still think i can run a 13.*something* i want to start playing with my tyre pressures.

start with 22psi and work your way down as u know u don't want to much sidewall flex or they may seperate

[rob77]

Quite a few of the guys have it here now as well. Its a set of polyurethene bushes that slip into the craddle mounts on the rear, there are 3 settings; drift, traction and normal. Basically it adjusts the way power is transfered to the wheels. The drift setting allows less traction on the rear for better/stable drifting where as the traction allows for better traction when cornering and launching @ drags. Its a kit you can buy from whiteline (kca349 is the part number for r33 skylines) and with a car jack, good socket set and an hour or so you can fit it yourself. Definately worthwhile getting one if you intend on doing a bit of drag racing.

[GTS-t VSPEC]

I was told that tyre pressures do f#@k-all on street radial tyres, this is according to Zoom magazine. If your running slicks then yes it does make a difference, but I wouldn't do it to normal tyres.

My 2c.

See'ya:burnout:

[skyzerr33]

try doing it on my tyres

they must be the hardest compound ever

i've got 77,000km out of them including 6 drag days and a mc motorsport day

[GTS-t VSPEC]

Skyzerr33,

I know what you mean by hard compounds, I have a set of 265's on the back of mine, so I could go drag racing on Wednesday. Well what a waste of time, should have stuck to the 235's, they were much stickier. The 265's are hard as rock, and therefore not much grip even being wider. I still think that changing tyre pressure will be marginal, but if it works for you then cool.

Has anyone changed the camber of the rear wheels in order to get better traction. After I lowered the rear of my car and have about 2deg of negative camber. I am planning on dialling it back to neutral, has anyone done this?

See'ya:burnout:

[Steve]

Dude, that is a pretty huge dyno readout, 270 rwhp without any sort of management, your car must be a freak.

With the pineapples, if it makes things clearer, the drift setup firms up the back end, the drag setup promotes squat, and the track setup is between the two from memory - hope this helps.

[GTS-t VSPEC]

Steve,

And you can get all three setups from the one part?

See'ya:burnout:

[skyzerr33]

no u get 6 pineapples

4 the same size 2 abit bigger

[rob77]

Rev210 ran 2 x 14.3's then let his street 205/55 tyres down to 20psi and ran a 13.8. Speaks for itself. And this was on 8psi due to one of his vacumn hoses blowing off.

[GTS-t VSPEC]

Skyzerr33,

Thanks for clearing that up, cheers mate.

Rob77,

I didn't say it didn't work for him, but I was told in general that it was a waste of time. Does anyone else run low pressures? If so what pressure and what tyres are they on?

See'ya :burnout:

[Steve]

GTS-t VSPEC,

to carry on from skyzerr, you can use the fat ones at the front with skinny ones at the rear (promote squat), skinny ones at front with fat ones at rear (drifto madness), or just use the skinny ones for in between (hope I got them the right way). They come with fitting instructions anyway. If you are getting any work done to your car involving putting it on a hoist, just pop in and chuck em on while she is up, they are dead easy to do, just a bit more difficult if you have to stuff around with a car jack:)