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Fastest Circuit Street S30 in AU?


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#41 dat2kman

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Posted 21 January 2013 - 07:23 PM

Richo, IIRC
you got a blower whooshbang thing?
wide giant rubber on fat tall rimz, flares, some fancy rubba?
Big kick arse disc brakes all round?
Super aero stuff?

Totally different to a Group Sc Z!
You should aim for 1.45 or better with all your mods!!!

But, those Vic gus DO know that track, some, VERY well!
Maybe a gentle 1.55 is a more docile time to aim for with a turbo equipped modded car.

#42 1600dave

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Posted 21 January 2013 - 07:28 PM

I don't know the Group S Prod. Sport rules so that doesn't help me...


Production Sports Cars - to quote the manual

"the modifications permitted
are not intended to radically alter the individual vehicle’s character or appearance and will be of an improved
performance road car nature, as opposed to making the vehicle totally dedicated to outright competition"

Cliffs :

Chassis / body - original, only mods allowed are removal of bumpers and, on some early roadster style cars (MG's, Fairlady's, Triumphs TR3's etc), removal of windscreen.

Engine - original block and head, standard stroke, bore can go to 60 thou over (allowed more for reconditioning purposes on these older engines than for performance). Head can be modified by removal of material only, no welding up chambers / ports to reshape them. No fanct stuff like dry sumps, roller rockers and the like (unless fitted as original equipment to the vehicle).

Exhaust is free.

Intake - must be original make, type and number of carb / carbs. In theory, and according to the CAMS spec sheets, this limits zeds to Hitachi SU carbs (not even allowed to use British SU's), but some zeds that I've seen running as (I believe) Group S seem to run Solex's ?? I stand to be corrected on this one.

Gearbox - must be original, same number of forward gears, ratios are free

Diff - must be original, internals are free

Brakes - must be original, only mods allowed are removal of dust shields and fitment of dual master cylinder to vehicles that were originally single circuit master.

Suspension - must be original except for spring rates, ride height and damper settings. Maximum of 2 degrees neg camber.

Wheels / tyres - restricted to certain allowable semi-slick tyres, max size 205/60/14 on 14x6 rims for zeds

So, a Group S car would be less modified than many L-engined, street registered and driven zeds.

#43 zr240

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Posted 21 January 2013 - 07:39 PM

Got a link for gordos youtube vid?

here is the link for some laps in my old car. had slicks though but you get the idea :)



Ash

#44 Zedman240®

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Posted 21 January 2013 - 07:44 PM

Got a link for gordos youtube vid?

Ash


If you want Ash, I have a video of Gordon when he drove my 240 around the Island...

#45 260DET

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Posted 21 January 2013 - 11:21 PM

  Can't compare a race car to one that is road legal without taking a whole lot of things into account. Being able to lose weight is a big advantage, less load on the brakes, tyres and suspension, better power to weight ratio, better handling from a cage stiffening the body. It drove me mad building my street Z because of all the comprmises that had to be made to keep it legal.

As far as power and brakes go around Lakeside, suspension and steering are more important. Except for the straight my accelerator on a good day would be flat to the floor for about six seconds for the rest of the circuit. Aero is very important there, I have yet to see a Qld S30 with any where near decent aero except for Neville's. His is still pretty basic but he agrees that it makes a big difference to lap times.

Anyone who really thinks that Lakeside is a power circuit does not have a clue. Don't believe that? Check out the best Excel times, they have standard engines.

#46 redrbzed

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Posted 03 February 2013 - 11:15 AM


Thought I should update this as I did a sprint with the WRX club yesterday at PI, the track is amazing, very smooth.
For some reason everyone's tyres squealed like they were in some b grade chase scene.
managed a PB, 1:44.7.
Unfortunately I won't be going to the Z nationals so a 1:44.7 is what you will have to better.


#47 dat2kman

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Posted 03 February 2013 - 03:26 PM

Throw hat down!
Sinisha wins!
I know what is needed to do 1.54's
10 seconds a lap quicker is a whole different ball game.

The fastest guys ( Porsche 2.7 Carrera) i race against in class  ( Prod Sports Sc) are at 1.47's ( 7 seconds)

But,,,, at Morgan Park, they are within 3 seconds f my times

#48 Gareth. J.

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Posted 03 February 2013 - 05:07 PM

Thought I should update this as I did a sprint with the WRX club yesterday at PI, the track is amazing, very smooth.
For some reason everyone's tyres squealed like they were in some b grade chase scene.
managed a PB, 1:44.7.
Unfortunately I won't be going to the Z nationals so a 1:44.7 is what you will have to better.


Whoa, that's quick! Do you think there's room for improvement?

#49 redrbzed

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Posted 03 February 2013 - 06:13 PM


Definitely, that wasn't the tidiest of laps.
I know there is more time to be found, I just have to find some heavy duty brave pills.
Probably about .5sec in my driving and another .5 in new tyres.
But, the faster I go the harder it gets to put together a clean lap.

#50 peter mc

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Posted 03 February 2013 - 06:32 PM

WOW great time man very cool , do you think the grip is better on the new track

#51 260DET

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Posted 03 February 2013 - 06:40 PM

1:44.7 eh, lucky for someone I'm just going to the Nats for some fun  ;D  Note: my excuse already registered 8)

Jigjog MP does not count Jason, well the K track does but it's not for ladyboys. And how can you let a Porker beat you at PI by seven seconds, thats a lifetime, dear oh dear. Still, your presence at the Nats will be missed, hope somehow things will get better for you.

#52 luvemfast

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Posted 03 February 2013 - 07:13 PM

I think that Kevin Mac is the only Z that can go faster than Sinisha?
Am I right? or prove me wrong!

#53 redrbzed

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Posted 03 February 2013 - 09:44 PM


Hi Peter,

Yes the grip is better, my peak lateral G reading went from 1.35 before resurface to 1.5G after.
How does that translate to lap times?
My guess is about .5 to .75sec improvement.




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