What is needed for 11 sec 1/4

[BU5TER]

hahahahahahahahahahahahahahahahahahahahaha

if it was easy everyone would do it

[GTRgeoff]

There seem to be quite a few good ol' v8's out there that can pull fast quarters, in the 9-11 sec bracket and doing it seemingly effortlessly when I have seen it at Willowbank.

It has just caught my attention and it seems there is a fair amount of drama involved with doing it in a 4/6. Lotsa noise and no guarantees kinda atmosphere.

These old fords I was getting to look at where nothing special. I was with mates of the owners and they were all a pretty standard setup with 2 speed boxes, good low grunt and juuuuuust the right suspension setup and tyre pressure (soft rears, really soft). Hell even a panel van did a 9!

'Lines tend more toward circuit setup in my limited perspective and obviously the 60 time is critical so if you were to trick the box, raise the stall and work the suspension it would be interesting to see how the stock power output would do over the early part of the course. Just seems too many import owners get the suspension and 'box setup wrong, more a street tuff setup.

[matlowth]

Once you get into the 12's (high/low) with mph over 120, tyres are the clincher...

On street tyres (ie. falken azenis st115 - which are ), the best I've run is 12.3 @ 124mph - with a 2.35 60ft...

Going by the fact that for each 0.1 sec at the 60ft line you should be able to make up 0.2 sec at the other end, a 1.85 sec 60ft time (in theory) should be worth a full second at the other end of the track.

The thing you've got to remember, is think about how quick 0.1 of a second is. It's about the same amount of time as it takes to blink!

The cheapest way to get an 11 sec 1/4 with the smallest amount of power, is a set of 90/10's in the front, 70/30's in the back, a 4000rpm high-stall, slicks and a set of front-runners!

Cheers,

matt

[RB20LagWagon]

What gearbox would you put behind a rb30det? Im in the process of starting a new project and ive decided its got to be drag foremost (over daily driving) it will still be a 'street car'. With this in mind ive decided on auto, can they do a jatco 4 speed which retains 4 speeds and can hold 500 rwhp. Or should i be looking at a turbo 350 with adapter plate?

[matlowth]

I'd jump on some of the VL Turbo forums and ask that question.

The bellhousing is identical (hence why my Std 5spd g/b mounts up the RB30 bottom end fine).

Cheers,

matt

[RS500]

  RB20LagWagon said:

What gearbox would you put behind a rb30det? Im in the process of starting a new project and ive decided its got to be drag foremost (over daily driving) it will still be a 'street car'. With this in mind ive decided on auto, can they do a jatco 4 speed which retains 4 speeds and can hold 500 rwhp. Or should i be looking at a turbo 350 with adapter plate?

first of all, if you're looking to build a car for drag racing, why are looking at retaining the crappy 4 spd Jatco?

depending on what times you're after, you'd ideally be better off going for a Trimatic or even a 2spd Powerglide :kick:

secondly,

if you're really dead set on the idea of the Jatco, i believe Yarrey Valley Autos are the guys to talk to.

[SuperGimp]

benm,

But gts-t dont have the PHAT gaurds.

[CroatianR33]

Ummm sorry rev210 but how is it possible for them to be achieving these times on street tyres. As far as I know only two GTR's in the country have even acheived mid/low 9's using nittos and they are Keir Wilson and Munro. They get traction problems in their 4wd equipped cars so how is it possible for the v8's not only to grab traction but finish the quarter with such low times on radial tyres. (I am trying to say they must be using slicks)

[GTRgeoff]

I was at a drag event at Willowbank 2 years ago and one of the guys I was with had a panelvan...V8 obviously and rear tyres with tread. Didn't take much notice other than that but they were running pretty low pressure. Ran a 9.? second pass as easy as. I was rocked, but this thing didn't like corners.

The V8 brigade have the drags sorted so there are a few things to learn off them.

[slyr33]

  RB20LagWagon said:

What gearbox would you put behind a rb30det? Im in the process of starting a new project and ive decided its got to be drag foremost (over daily driving) it will still be a 'street car'. With this in mind ive decided on auto, can they do a jatco 4 speed which retains 4 speeds and can hold 500 rwhp. Or should i be looking at a turbo 350 with adapter plate?

I had a vl calais turbo with a 5 speed RB30DET box in it and it handled 220rwkw easily. But i went through clutches and diffs a fair bit. U put a good driveline on it, over 200 kw and ull be scaring alot of the nice cars on the road. ( i miss mine )

[rev210]

  CroatianR33 said:

Ummm sorry rev210 but how is it possible for them to be achieving these times on street tyres. As far as I know only two GTR's in the country have even acheived mid/low 9's using nittos and they are Keir Wilson and Munro. They get traction problems in their 4wd equipped cars so how is it possible for the v8's not only to grab traction but finish the quarter with such low times on radial tyres. (I am trying to say they must be using slicks)

go to your local drag strip, then we will have this discussion again if you think there is a point to it.