Time to upgrade

[RODA]

Okay Guys some advice needed.

What is going to give me a quicker lap time ( Apart from my the obvious of lack of driving talent).

A set of Tarmac/Track tyres or bigger and better brakes?

I am contemplating an upgrade and at present the budget only allows me to do one or the other not both.

My Classic Revival has the standard jag front brakes with yellow stuff race pads. The car stops really well but boy do you have to stand on the brakes.

Tyres wise I currently running Sumtomo's.

So my dilemma is which one do I upgrade and what do I upgrade too?

Any help would be greatly appreciated.

Rod

[Aussie Mike]

For an actual reduction in lap times Tyres will have the biggest impact. The Sumitomos aren't a great track tyre compared to something like the Kumho KU36 or other track focused tyres. .

[LoBelly]

Originally Posted by Aussie Mike

For an actual reduction in lap times Tyres will have the biggest impact. The Sumitomos aren't a great track tyre compared to something like the Kumho KU36 or other track focused tyres. .

this

[Wazza]

Tyres...without a doubt.
Ive had"Toyo proxes R888" on mine for the last year...they're great in the wet...awesome in the dry...wearing surprisingly well....and are great semi slick track tyres.
Good luck .

[Tenrocca]

Definitely tyres. There is nothing wrong with the jag brakes except they are a bit heavy. I have jag front and territory disks on the rear, vented\slotted front disks, yellow stuff pads, and stainless pistons in the jag brakes which are supposed to help with fade. You do have to jump on them, however at the time my engineer said he had only tested one GT40 with a big brake setup that pulled up quicker. That included another CR on the same day with the CR "big brake kit".



Going from the KU31 to the KU36 made about 2-3 secs difference around Wakefield. Ku36 are getting had to find I think as they are out of production but an equivalent tyre like the Nitto NT05 or Falken RT615K should make a big difference.

[gjkrv8]

Tyres have been the cheapest and largest impact for me.

I went from the Sumitomo's to the Ku36's like others have, but as Tenrocca said they are starting to get a bit scarce.

I haven't researched other tyres yet as mine still have a fair bit of life left in them.

cheers

Gregg

[boxhead]

Tyres.

[stiffy]

Rod,

What they said AND an advanced driving course.

The two best things you can do t improve your lap times.

I recommend John Bowe for the driving course.


Stiffy

[Gav]

+1 for Tyres

[PS427]

Tyres are a great idea, but I currently can't get anything in a 275,285or 295 for 17 inch rims. Any one got any ideas for occasional track work.
Control tyre category will have to find something other than KU 36.

[RODA]

So tyres it is.

As Ku36's are like hens teeth to find, I was wondering does anybody know much about Nitto NT05's, they are available in the size I need and are very well priced against the Toyo R888.


Gav, Mike and Andrew as my CR is the same vintage as yours, have any of you thought about installing a brakes booster to help with pedal pressure?

I know there is no room in the engine bay, so it would have to be located somewhere remotely i.e say in the boot.

Rod

[boxhead]

Dual masters will make it nigh on impossible to add a booster (or 2 due to room)

Unless something changes when fitting larger calipers, I love the feel of the dual cylinders unboosted in my CR.

[gjkrv8]

Rod, First maybe check your MC sizes with Gav, Mike and Boxhead to see if you have the same/right size etc? (I can't as i have the round-tube different brake setup).

cheers

Gregg

[Gav]

My brake pedal is great, very hard, but good.
I have AP front calipers and territory rears with the same master cylinders as what was used on the stack brakes like you have now.
Braided brake lines make a big difference to pedal feel, the rubber ones make the pedal spongy.
The KU36's where available in 17x 285 and 17x 245 last October?

[Dimis]

1. Tyres. Yes! As simple as Tyres!

2. Reduce weight.
Initially cheap, then escalates in price for marginal gains. Ie: lose the radio and spare, lots of weight reduced for near zero cost. Then reduce weight by swapping parts for carbon fibre etc, all the way down to the valve covers. See, big dollars, for grams saved. It's endless.


Then....

3. Aero (drag vs down-force) - so hop down to Bunnings, grab yourself some plyboard, screws and lots of tape... Have fun!

https://grassrootsmotorsports.com/fo...d/39702/page1/

Enjoy

[Beejay]

Tyres will make a huge improvement, but as Stiffy has noted some driver training is so rewarding and valuable that it is a must if you are going to have a decent crack on the track.

As you explore the limits you will probably need to look at brake pads and cooling ducts to keep those brakes working as you get faster, no need for big sicks and callipers unless you are chasing the big guys.

CR brakes are awesome, but agreed you need to get used to the heavy feel.

Ben

[Treeve]

I know people who have spent money on driver training and are then consistently faster in anything they drive than people who upgrade.

Getting good safe tyres is a must for predictability, but nothing beats knowing what you're doing out there - as instructed by a professional, not just believing your own hype. Unless you're lapping within 0.3-0.5s per lap at wakefield then you don't need more power / brakes, you need to learn to use what you've got.

Changing pads makes more difference. EBC yellow / green stuff pads are old news; these days Ferodo DS2500 / DS3000 are the good gear and will pull you up like you're hitting a wall, but still give you pedal feel.

There's no point in boosting your brakes if your pads are crap.

Speak to a brake expert like Competition Friction Brake Pads - Ferodo Racing and see what they recommend for your calipers.

[boxhead]

I never ran with rubber hoses, but as Gav says, apparently that makes a huge difference to the CR brakes when running stainless flex.

[Modena]

Im running Ferodos as recommended after discussions with Competition Friction. The braking in my car is AMAZING!!!

[RODA]

So I have decided to leave the brakes alone as I already run stainless flexible lines and at present run yellow stuff brake pads.

The tyres I am looking at are NItto Nt01, does anybody have any feed back on these tyres.

I am also going to do an advance driving course, I have read about John Bowe's course has anybody tried anyone else in Melbourne.

Thanks

Rod