15.2 @ 92mph unopened V6

[immortality]

did a 15.2sec @92mph 1/4 mile on the Gtech this morning on my stock 14" wheels. it definitly looks like my stock zorst with rattly muffler being holding her back. that was my best pass and was the only time it didn't spin off the line launching just under 3000rpm with wheel spin i was doing a 15.5 sec. i think with better rubber and getting my shift points right and fiddling with the tune some should hopefully drop that to a 15flat or maybe into the 14's.

i'm also considering getting a pro billet short shifter as i missed the 2nd to 3rd change twice this morning which isn't a good look or good for my syncro's either

[Morton]

Hahahaha, nice ^^ Very nice! I'm yet to do a 1/4 mile run - I should!

You should ditch the spare, jack, seats, towbar, sound deadening, do another run, and THEN tell us how you go

[immortality]

the tank was 3/4 full and i had my small tool box behind the drivers seat also, 5ltr jerry can and jumperleads too. think i can do better with a bit more practise

[PaRaDoX]

hey man! thats a fair time, be careful tho you have to use a flat patch of ground, dont bother stalling it with a stocky they'res no gain as the vn is pretty quick off the line.

but still not bad!!!! quickest i could run was a 15.7 N/A but my car weighs a bit

whats the 80-100 performance like?
i found by changing the valve springs it picked up alot

good time tho

[andrewownsavp]

Hmmm nice one so what is done to your car? And what were you shifting at?

[pandaman]

hey man! thats a fair time, be careful tho you have to use a flat patch of ground, dont bother stalling it with a stocky they'res no gain as the vn is pretty quick off the line.

but still not bad!!!! quickest i could run was a 15.7 N/A but my car weighs a bit

whats the 80-100 performance like?
i found by changing the valve springs it picked up alot

good time tho

Heh, stalling? That's just for sooks like us who don't have a real gearbox. His is a manual by what he's saying.

[Morton]

Yeah, it's the T5 he's running. Makes for some juicy times if you know what you're doing ^^

[immortality]

Definitly a T5 manual box. it's only got a shielded pod setup with CIA, exhaust shield. coby headers with 2.5" mandrel bent zorst with straight through mufflers and no CAT (yes it's legal here in NZ, it never had one to begin with) and LSD with 3.45 gears. this is where i made my time.

previous to getting the new zorst and LSD i was consistenly only getting a 16.1 even with a SV3800 tune (the stock zorst had a rattly muffler which was chocking things a bit). with 17" wheels with some nice bridgestone SO1's i had previously done a 15.9 with a touch of wheel spin.

i've noticed that with the 17's even with a little wheelspin the tyres would bit and you would go, with the 14's (even with the LSD) if they start to spin you totally over power em and you need to back off to get traction back.

from that i take that i've probably got another .1 (maybe a touch more) just by having some decent rubber under the rear of the car , with the LSD and good rubber i will also be able to launch with a few more RPM. i feel a 15 flat coming on soon.

also my test track is not the greatest, it's quiet rough, not nice flat seal to aid traction at all

[Morton]

Ahh I love hearing all about G-Tech runs ^^

I think a good sticky road surface would see you under 15 as it stands. I've been thinking lately - if I was to lather my back right tyre with a bit of good 'ole belt-grip, d'ya think she'd stick a little better? That stuff works darn well on belts, and tacks them up nicely.

[Emackulation]

Hmmm, you should be able to break into the 14.9 easy man. Last run in my old VN i pulled a 14.95, basically had the same mods minus the diff, add a cat and minus the manual.

[immortality]

Ahh I love hearing all about G-Tech runs ^^

I think a good sticky road surface would see you under 15 as it stands. I've been thinking lately - if I was to lather my back right tyre with a bit of good 'ole belt-grip, d'ya think she'd stick a little better? That stuff works darn well on belts, and tacks them up nicely.

never thought of that, i guess it might work, make a bloody mess though.

Hmmm, you should be able to break into the 14.9 easy man. Last run in my old VN i pulled a 14.95, basically had the same mods minus the diff, add a cat and minus the manual.

yeah, your probably right, conditions weren't really suitable, it was fairly cold yesterday morning and i never really warm the tyres up like you should do. given the right conditions i may break into the 14's as is. think i might have to go to meremere next time they have test day to see what it does on a decent surface

[immortality]

a new tune with a few more degrees of timing at WOT should see me break into the 14's

[Morton]

Aaah What chip are you running at the moment?

[immortality]

Aaah What chip are you running at the moment?

SV3800 (arbp.bin i think) think i might need to upgrade to the later asby.bin as per another thread below it has a few more degrees of timing. maybe i'll put that random V6 tune greenfoam mentioned but then i'll need to go to 95ron fuel i think so it doesn't ping

[Morton]

Aah... such marginal gains to be had from that stuff anyway if you're already running the SV tune. Better off finding a way to shave off some weight.

That gets me thinking, though. Dump the power steering fluid, engine oil, coolant and brake fluid - that's a good 10kg right there...

[immortality]

Aah... such marginal gains to be had from that stuff anyway if you're already running the SV tune. Better off finding a way to shave off some weight.

That gets me thinking, though. Dump the power steering fluid, engine oil, coolant and brake fluid - that's a good 10kg right there...

you would be surprised what a few degrees of timing are worth. on a V8 the difference between the standard tune and HSV tune is basically 4 degrees advance which is about 20kw between tunes. so even if i only get a few kw's it's a real gain (and i think it might be worth between 6-8kw) and there isn't that much weight to take out of the VN exec. i just added weight by fitting a remote oil filter setup which has probably increased the filter capacity by 300% and it takes about 1/2 liter more oil. will post some pics in my ride later of the new setup. unless i get the missus to drag it, thats an easy 50kg less then me in it already

[VN Commy]

SV3800 (arbp.bin i think) think i might need to upgrade to the later asby.bin as per another thread below it has a few more degrees of timing. maybe i'll put that random V6 tune greenfoam mentioned but then i'll need to go to 95ron fuel i think so it doesn't ping

Are you only sticking 91 in it at the moment? Doing a run with 98 might help. Mine loves it.

[greenfoam]

98 will make you go slower, 95 might however make you a touch faster. 98 octane burns slower and makes less power. Even 95 burns slower and less agressivly than 91 but because you can run that little bit more timing with it then it's worth it

[STEALTHY™]

Where is this Gtech track? I've never heard of it before

[immortality]

think i'll try some 95 when she's empty next time cause i'm going to up the timing a little me thinks

Gtech track? a nice stretch of sealed tarmac in a place with no name

[immortality]

did a 6.918sec 0-60mph this morning but still can only get a 15.2 1/4mile @91.4mph. can't get better then a 2.3sec 60ft time. i'm lacking traction big time me thinks that i've maybe got to drop a few psi from the tyres cause i've got them inflated with about 30psi for highway driving and do a huge burnout to get em nice and sticky. also think i've gotta rev 1st gear out more(maybe to 5200rpm, i'm currently changing about 4800rpm), the Gtech power graph shows i'm changing gear before i hit peak power in 1st. gotta get that 14sec pass now.

just re-installed my sata HD, last time the driver died and gave me the blue screen of death (so far so good with the new driver) from my old data files i have found my 1st gtech runs before most of my mods, with the single spinner diff and 17" wheels i was getting a 2.4-2.5sec 60ft time, the LSD with 14" wheels have only dropped it by .2 sec and i was launching with about 2000rpm with a little wheel spin. definitly need better rubber to improve the 60ft time

[greenfoam]

Congratulations on the 6.9 I make 2.15s in my vp at the track, 2.3s sounds ok for a V6 but I think you should really be in the 2.2s in a manual. 2000 revs isn't anywhere near enough for a hard launch in a manual. I'd like to think I could to a 2 flat or 1.99 60 foot with a v6 ratioed T5 in my VP. Last night I made a gtech run without backing off the throttle on the launch and just left it go up in smoke to see what kinda time I could run while under full wheelspin conditions, I made a 6.3 to 60mph with enough smoke to leave rubber stuck to the passenger rear 1/4 :P, 5100-5200 revs was the sweet spot on my lexcen but for the gearshift

[VN Commy]

5100-5200 revs was the sweet spot on my lexcen but for the gearshift

Yeah I've found ringing it out a bit past 4800 up into this sort of range is good. It also helps put the next gear a bit further up the power band.

Atleast with the 2000 rpm lauch his clutch will be thanking him for it.
A couple of full blown, clutch riding, high rpm launches would be interesting though.

Thanks for the info about the octane, I always thought the higher the octane, the more energy was released. I might have to go try some 91 and 95.

[immortality]

Congratulations on the 6.9 I make 2.15s in my vp at the track, 2.3s sounds ok for a V6 but I think you should really be in the 2.2s in a manual. 2000 revs isn't anywhere near enough for a hard launch in a manual. I'd like to think I could to a 2 flat or 1.99 60 foot with a v6 ratioed T5 in my VP. Last night I made a gtech run without backing off the throttle on the launch and just left it go up in smoke to see what kinda time I could run while under full wheelspin conditions, I made a 6.3 to 60mph with enough smoke to leave rubber stuck to the passenger rear 1/4 :P, 5100-5200 revs was the sweet spot on my lexcen but for the gearshift

cheers

did a pass where i popped the revs up more and spun it all the way through 1st gear and still did a 15.4sec 1/4 and 2.3 60ft. gonna play with tyre pressures next. not to keen on ridding the clutch to much as i'm not keen on fitting a new one at the mo, as it is i've got to pull the box off and reset the clutch fork pivot point, when i fitted the new clutch i had the flywheel machined but they ****ed it up and had to do it again so they took a lot more material off then normal, when i let the clutch pedal up it's not engaging untill its 3/4 of the way up. little 195/14's just aren't made for traction

Yeah I've found ringing it out a bit past 4800 up into this sort of range is good. It also helps put the next gear a bit further up the power band.

Atleast with the 2000 rpm lauch his clutch will be thanking him for it.
A couple of full blown, clutch riding, high rpm launches would be interesting though.

Thanks for the info about the octane, I always thought the higher the octane, the more energy was released. I might have to go try some 91 and 95.

i may try one launch with lots of rpm and ride the clutch a little. gonna try some 95 fuel next just to see what difference it makes. i'm thinking i want to try the asby tune cause it's got more ignition advance over the arbp tune. if i can improve the topend power i can make up for the lack of taction on launch and get my 14 that way

[immortality]

looks like the hunt for a 14s 1/4mile pass is temporarily on hold, did 2 runs this morning and only managed 15.6 @ 88mph. dropped the tyre pressures a few psi and warmed them up a little but i'm starting to suffer from clutch slip when changing gears. at the very least i've gotta drop the box and change the pivot point for the clutch fork so that the clutch picks up earlier and maybe inspect the clutch itself. hoping that the linings aren't toast. it's done atleast 20 passes in the past 7 days. the other day, did 6 back to back passes is about 20 minutes not the best for a standard clutch