Project 12sec R33 GTST Daily Driver

[Guest MFX_R33]

Tyre compound is definitly an issue in my case. The Fulda's I have are very hard. They are lasting really well but they are crap for traction. If I use full boost I can't get traction in first or second on the street.

Jeff.

[WazR32GTSt]

rev have you been to test out your car at the drags yet?

[rev210]

WazR32GTst,

Just last nite.

13.3 @ 106mph (2.3 60ft). Letting down the tyres wrong let me down.

I had 14.5psi in one and 18.5psi in the other and it was not predictable at all. The S-afc had to run a really rich map (read power killer) and I couldn't take it past 6000rpm because of a mystery knock that I can't get rid of.

Had a real mixed bag of passes , most slow. 13.7s, a 14 even a 15.

Other than that it was good fun as always. I went toe to toe with a drag torana in a burnout that had all the staging lane covered in smoke for a couple of minutes, so that was good.

[giz01]

Big tyre in Toowoomba will do a set of retread soft compound tyres that are great strip tyres! i have a set for the crapi & mates LX hatch ran [email protected] on them, best 60ft was mid 1.5sec so they hook up well

[rev210]

giz01,

whats the damage on those? ( eg: 235/16's).

Retreads? They must be the best value drag tyres around.

[giz01]

BIG TYRE TOOWOOMBA

226 North st Toowoomba

PH: (07) 46999748

Give them a ring & ask!

Mate told me they originally made them for speedway racing, but the drag guys found out about them & started using them.

You can get them as a slick or they will cut a few treads into them, so if you had them on the car on the street, the cops shouldn't be able to do anything because they are just a retread tyre. They make a really loud howl when you do get them to spin it sounds really cool unlike any other tyre howl that i have ever heard. I think mate paid around $150each tyre for 265/50/14 & he supplied the cases.

[rev210]

I've finally decided to book a dyno session.

SST next wed morning. If all goes well I'll be going to the drags that night to get my fricken 12second pass.

[Merli]

I managed to break into the 12s tonight...

Should keep me satisfied until my Nittos arrive, and I'll make a run for 11s...

[benm]

What was your 3rd run Merli? It looked like a 12sec pass but the stupid c0ck head comentators were too busy jibbering about the new drag strip and didnt bother reading out your time.

[Merli]

60ft - 2.034

E.T. - 12.412

MPH - 114.46mph

[whatsisname]

Congrats Merli Good stuff! Great to see a fellow GTS25t break the sub 13 barrier.

Gotta be happy to crack into the 12's for the first time. High 11's is possible with that mph.

I've got the same top end (115.83 mph - best so far). Just need to get my damn 60ft into the same 2.0 range as you.

[Merli]

Thanks Matt

Yeah, good to finally get a decent time out of her... I've got some Nitto NT555Rs coming soon, and I'll be putting them on R32 GTR rims that I've already sourced, so hopefully that will allow me to launch a tiny bit harder and go for low 12s...

With slicks, and God holding the gearbox together, 11s should be possible if the mph is any indication.

[whatsisname]

Andrew,

Were you running the D01J's? If so, what launch technique did you employ? What sort of burnout, tyre pressures, slip or dump, rev's etc. Thanks mate My 540's have yet to give their best. Thanks to a shot clutch (now upgraded).

11's will need a very hard launch (low 1.9 60) NT555R's will do it. My next rear rubber will be the same.

[Merli]

I slapped on my 17" D01Js that I use for circuit racing...

I also have 18" D01Js on my normal street tyres, but they are rock hard, it seems if you don't drive them hard and get some heat into them often, they "go off" and turn rock hard

So I decided to put the softer D01Js that I use for track use on.

My turbo comes on boost HARD at 4000rpm, so it's a hard car to launch properly... I was launching at 3500rpm, and the car would bog down, slowly spool up, hit boost and break into violent wheelspin

On my 2.034 60 foot pass, I dialed up 5000rpm, and jerked the clutch out quickly to the friction point... This caused the car to launch forward violently, where I then kept slipping the clutch for another second or two until I knew I had enough traction to floor the car and release the clutch.

This technique effectively kept revs at about 4500-5000rpm, never letting it drop below 4000rpm, so I didn't have to wait so long for the turbo to spool after the initial launch.

540s are great tyres, but their sidewalls are stiff, as they're primarily a circuit tyre, just like the D01Js. Not good for drags, because they don't flex much... The NT555Rs nowever have a very soft sidewall to absorb the shock of the launch

[R31Nismoid]

merli... your car sounds similar to mine. late boost = violent when it hits boost.

I did a 60ft of 2.03, same thing watsisname Dropped mine from around 5500, edged the car off and slipped it just to the point where i felt it edgy on the traction

Simex 215/60 on 16 inch 32 GTR wheels.

roughly minda power you making also merli ??

[whatsisname]

Thanks for the feedback guys - very handy!

Andrew,

My car has the same power delivery as yours & R31Nismoid’s.

As you said, it's very tricky to launch. I've had the same problems. Dump @ 3-3.5k & it bogs down. Dump @ 4.5+k & it hooks up for a sec, then blazes the tyres. I've yet to be able to do the, "clutch slip feed power on launch", as the old clutch gave up the ghost at the slightest hint of me slipping it The new clutch is up to the task no prob. Just need to practice on the strip now.

Yeah I knew the 540's weren't the greatest drag rubber (stiffest sidewall R compound there is!). I got them as they're well priced over here in Adelaide (paid $280 - 235/45/17 & $310 - 255/40/17) & they're great on the street.

I've got a contact for 555R's - $425 for 275/40/17

[ice180]

try jap style and load it up on the hand brake of course providing your hand brake is strong enough to hold all that power..

[R31Nismoid]

Originally posted by whatsisname

Thanks for the feedback guys - very handy!

My car has the same power delivery as yours & R31Nismoid’s.

anytime.

i've only raced twice at any strip and only night in the GTS-R

Mine hits boost about 4500 though and is furious, but in saying that i have a twin plate (i think it is as it makes that shh shh metalnoise when you push the clutch) and just get it just to friction and slowly roll to to the second white (pre stage i think) then push it in a tad (you stop) then your laughing cause you only ease it a touch back and you launch hard. I got wheelspin all the way through 1st but very minimal with no bogging at all.

Handbrake is something me never thougt of

*he's going to practice that one*

[R31Nismoid]

also though... i think i've got the launches quite easily.

But shifting methods i feel is 100% my weak point and is hindering me a great deal.

Any tips there ??

[Merli]

R31Nismoid, I made the following figures:

280rwkw @ 1.2 bar on CRD's (Croydon Autosports) dyno, and

263.8rwkw @ 1.1 bar on C&V's dyno.

If you're wondering why my terminal speed is a little low for that power, it's because I ran 100% street trim. Not one iota of weight reduction. I ran with FULL stereo, subwoofer, about 40kgs of sound deadening, spare tyre and all interior trim and seats.

I've ordered some 245/50/16 NT555Rs for the two R32 GTR rims I have... I could have gone for those 275/40/17s, but I thought I'd trade a little width for more sidewall... I hope I made the right decision.

ice180: Last time I went to the drags, I tried loading up using the handbrake, and I promptly snapped my right driveshaft clean in half I ain't gonna try that again in a hurry, cos I felt like the biggest dickhead having to be towed off in front of everybody