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Just A Couple Of Nooby Drag Questions

GTAAAH

By GTAAAH,
in Motorsport Discussion & Builds

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GTAAAH Mentor

GTAAAH

Posted
Posted

Ok so i got a r32 gts-t, with mods listed in my signature thingo, and was wondering a few things

it hits peak kilowatts at 5800rpm, then drops about 3 kilowatts to about 6300rpm, So in 1st, 2nd 3rd, i should be shifting at 5800rpm?

Other question is about taking off. Do i slip the clutch from like 5krpm to get moving, or drop the clutch high enough so that it spins once or twice (about 3.5krpm), or do i drop it lower so that it doesnt spin at all, or do i drop it high so that it spins for a bit then takes off, which? It starts coming onto boost at about 3krpm hits peak at about 4.2

Taking it to calder this weekend, also wondering what sort of time should i be expecting? I wanted a mid 13 pass, but the bloke who tuned it said more like 13.8-9. Its got SPMAXX dunlops on the back (45 series) on some 17X7 rims with plenty of tread. Im not sure about the suspension but it seems pretty hard unfortunately (i assume its that which gives me copious spinage into 2nd) Er also is it worthwile dropping my tyre pressure to like 28psi? its about 38 now.

ctjet Grand Master

ctjet

Posted
Posted

You'll be aiming at a High 13 with 170@wheels.

Drop it in from3.5k and dont slam your gear changes cause at Calder you'll get a shit load of whellspin. Just change slightly quicker than you normally would and ease the power on for he first coulpe gears. it makes a big difference, it cut my time by 0.35 of a sec

BezerkR32 Veteran

BezerkR32

Posted
Posted

Put some MT street radials on it.

ahh ok cheers, any one else can answer a few questions it'd be much appreciated (think i asked to many :)) in particular the first one about shift points
GTAAAH Mentor

GTAAAH

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Posted (edited)

yeh ok, i know that good suspension and tyres as well as wheel size will make my 1/4's faster but, im not really interested in any of that. Only want to know how to drive really, not what to drive as i want my car to be capable on the street of what its capable of on the strip

any one else? (in particular the first one about shift points)

Edited by r32 gts-turbo
MrBlonde Community Regular

MrBlonde

Posted
Posted (edited)
yeh ok, i know that good suspension and tyres as well as wheel size will make my 1/4's faster but, im not really interested in any of that. Only want to know how to drive really, not what to drive as i want my car to be capable on the street of what its capable of on the strip

any one else? (in particular the first one about shift points)

You're mising the point here. Drag racing is done on a drag strip, which has nothing in common with the street. The available traction on a prepared drag strip will never be approached on a street. Nor do streets have staging lights or timing equipment.

Therefore the techniques used to launch hard at the drag strip bear nothing in common to "launching" hard on the street. The RPMs you can use are different. The rubber you can use is different. The clutch techniques are different.

With street radials on a pure street car at a drag strip, then you would launch with a high RPM as you can possibly get away with, provided you get no more than 10% wheelspin. You want to aim to avoid bogging down (not enough RPMs) and avoid smoking the tyres (too much RPMs). The sweet spot is in the middle there with some wheelspin, but it's not as easy as it looks. That's what drag racing is all about - the launch.

I'd recommend you use your clutch to modulate the power transferred to the rear wheels, even if that means not fully letting the clutch out before you reach second gear. Same goes for each gear change.

This will shorten the life of your clutch.

Edited by MrBlonde

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