Lap times - GTST vs GTR

[mokompri]

i agree with roys theory, the problem with reality and theory is that you can never take all the variables in reality and put them into theory

you would have to have a very well controlled test to be able to see the theory in action

to put roys theory to test, you should be using 2 gtr's or 2 gts's, not one of each

im curious about this 'ben' persons car, any one have info or know where i can have a geez at it

by the way, sr20det will own all your whales lol jk

[Sydneykid]

by the way, sr20det will own all your whales lol jk

As long as the rockers don't fly off and the block doesn't split. :Paranoid:

[Duncan]

.....it is my recollection that ~20% slower rotation of the tyre is the best for stopping distance on a hard surface.  

very interesting, I remember reading somewhere (?) that a car is quickest through a corner with between 10 and 16% slip which sounds like a similar theory. Have you seen this data you have checked?

[GTRgeoff]

mok, that doesn't deserve a reply. Ben can be found at racepace, and apparently has a policy of not working on rb20's as it's a waste of time or something

SK has a good point. I did a half day with Rick Bates in the forest (don't ask what that costs) when I was getting back into rally (rwd datto 1600 of Course and we used that car) and the biggest lesson was braking, not oversteer control etc and lockup was just another technique for fast stopping. Some control is lost so you set the motion before the lockup. I still use a little of this on the track by compression method.

I wonder how much it would be to hire kevwrx for a day amongst a group, and just how much faster than us he would be??

[adznight]

i agree with roys theory, the problem with reality and theory is that you can never take all the variables in reality and put them into theory

you would have to have a very well controlled test to be able to see the theory in action

to put roys theory to test, you should be using 2 gtr's or 2 gts's, not one of each

im curious about this 'ben' persons car, any one have info or know where i can have a geez at it

by the way, sr20det will own all your whales lol jk

Yeah Ben from Racepace in Victoria. It's a bloody machine. 3ltr conversion, ben's special single garret hybrid and all the goodies to match.

[GTRgeoff]

very interesting, I remember reading somewhere (?) that a car is quickest through a corner with between 10 and 16% slip which sounds like a similar theory. Have you seen this data you have checked?

Ask Roy, he has my Racecar Engineering text and it has the data.

[Duncan]

Ask Roy, he has my Racecar Engineering text and it has the data.

I guess he has plenty of time to read since hos car is never on the road

[GTRgeoff]

BTW Mok, ben was doing 1:16 to Snowies 1:24 to my 1:31.....ouch!

[mokompri]

As long as the rockers don't fly off and the block doesn't split. :Paranoid:

haha touche...

[GTRgeoff]

I guess he has plenty of time to read since hos car is never on the road

Too busy whoring on SAU. Switch off 'puter and go to car and swing spanner mate. After dark put down spanner (clean up tomorrow) and drink beer and read good car mags while the girlie (whoever it is this week) watches home improvement/reality shows on telly......

He's had it 6 months and still hasn't turned a page. Bet he's scared it will destroy his big brake fetish although he has demonstrated some of this in previous posts.

[Roy]

LOL..ive read pelnty of it. Difference between reading it and absorbing it is another 2-3 reads:) I think i should maybe get a copy for myself:)

Good news, a little birdie tells me the car looks like it will make 230rwkws with nothing too aggressive in the way of ignition and fuel...so 2:1 ay? Ill take those odds:) Would have been finished today except a temp cooler pipe i threw on it keeps blowing off. Need to get down to the ceramic coaters and get my IC piping sorted:)

Speaking of track work, anyone have experiences with tuning. When a car is running with elevated water temp, oil temp, cylinder temps etc how much margin should be in your street tune to avoid detonation / damage? Or does the dyno tune with crappy little fan do a resonable job of ensuring the things are tuned in less then ideal conditions?

[GTRgeoff]

I'm on 11.6:1 ratios and have no problems yet....

[Roy]

Yeh but how much ignition is dialled into the thing? I need to get the TD06 singing:) Would you believe im starting to get all excited about getting the car back? 4 day weekend coming up, the car will be an animal come next Wednesday:thumbsup:

RB20 POWAH!!!!:whackit:

[GTRgeoff]

Who knows? I have no hand controller so I don't fiddle....

[mokompri]

thanks for the pics Adzmax, the car seems to be an animal.. how much is it putting out ?

i assume racespace is his workshop, lucky man!

[Duncan]

c'mon roy its only and RB20....crank it right up...they are cheap enough if you need a new one.

We are relying on you to bash some GTR boys at some stage.

Gary, I think I remember you saying that you had your rb31gtst at Phillip Island, what times did it do, and on which tyres?

[Emre]

My next bone to pick is big brakes...two identical GTRs, with identical 355mm rotors, identical tyres and suspension, but one has 6pot/8pot AP/Brembos and the other has std 4 pot Brembo caliper. (assuming equitable pad compunds)

Will they stop the same for the first half dozen laps around the track? I say yes:)

I was making an idiot of myslef recently when i was trying to tell a guy that a certain monster car with race car brake package wouldnt stop any quicker then a car with a much more sedate braking package.  I was trying to say the suspension and tyre package would account for any difference more then the caliper / rotor package.  

Troy - are you trying to say that the reason Benno can out brake me by MILES given that we run the same tyres is due to his suspension set-up rather than his massive brakes? LOL.

Snowy,

To be fair, Roy is only talking about a caliper upgrade.

On sunday, Roy pointed out to Snowie's brakes and said to the guy that, that brake package, was all that would be needed.

The guy looked at Roy than at Snowie's brakes than back at Roy and said : "but those are only stock size".

To which, Roy began sharing his theories with great enthusiasm, most likely without realizing that Snowie's rotors were stock sized.

As there was no alcohol involved, the discussion was somewhat short lived and the guy was distracted with something else.

:bahaha: :bahaha: :bahaha:

It's true that the braking limit is determined by your tyre contact patch, but in the case of 33s, an 18 inch wheel upgrade increases your tyre contact patch (albeit more to assist lateral grip) therefore increasing your braking point where you lock up.

Roy's revolving or hinged door anology clearly explains how a car can benefit from a brake upgrade. The problem is that, towards the larger sizes, a brake and wheel upgrade can be quite costly and it would be advisable to look at different ways of increased breaking force.

In any case, if it wasn't for the weak Snowmeister, this issue could've been discussed the night before with greater value

[Roy]

....As there was no alcohol involved, the discussion was somewhat short lived and the guy was distracted with something else.  

:bahaha:  :bahaha:  :bahaha:  

LOL, i carrie don the conversation with myelf for another 10 minutes after you walked off:)

Yeh but 330mm rotors are pretty damn big:thumbsup: 18s would be nice with some 355s, but the budget doesnt go that far sadly.

6pot Endless calipers with 355mm rotors and white 18" Advans are on my list for Santa:whackit:

[Emre]

LOL, i carrie don the conversation with myelf for another 10 minutes after you walked off:)  

PMSL...

6pot Endless calipers with 355mm rotors and white 18" Advans are on my list for Santa

Have you been a good boy...?

Speaking of track work, anyone have experiences with tuning. When a car is running with elevated water temp, oil temp, cylinder temps etc how much margin should be in your street tune to avoid detonation / damage?

I'm shocked to say, my water temps reached as high as 117 degrees on the weekend. Oil temps were as high as 125 degrees.

The PowerFc has protection against higher temperatures, built in. For example, if the water temperature goes above 90 degrees, it starts taking ignition out progressively, as much as 5 degrees at 110 degrees. Same deal for intake temperatures.

[Roy]

Hey The Guy... on the Datalogit screen

So i imagine the Pfc has a deault which cant be accesses or tweaked by the handset. I have to get the Apexi Software of Datalogit, just have to get some coin together.

As fo rbeing good, if Santa doesnt come good i tell you ill play up between Xmas and NYE:)