5K

[brendan]

hey guys

i have a 70 with a 5k wich is worked flat tops heaps of head work cam twin sidraughts (40mm)

extractors etc

it ran a 17.0 flat at eastern creek last year is there anything i can do to knock off atleast 1 sec

i know 1 sec is a big jump but just wanted to get your thoughts on this

if anyone has a 4 or 5k n/aspirated that runs quiker than this please post your time

and mods

thanks guys have a good easter

Edited April 6, 2012 by brendan

[coln72]

Put your car on a diet

[B.L.Z.BUB]

EDIT: You want N/A I see

 

^as above

 

Maybe list all the etc's you've done

Edited April 6, 2012 by B.L.Z.BUB

[Chillin]

If you're loosing traction off the starts maybe look at some wider tread on the rear

[brendan]

well the cam is a stage 2 from camtech and the head was sent off to superflow heads wich they matchported everything and match the specs off the cam to suit the head,decked for comp, double valve springs,it was also changed from hydro to solid lifter set up, it was all balanced

[brendan]

na no problem with traction ive got 195/75 14s and its not slipping yet ,when i had the motor and box in my 15 it was running the same time thats what i don't understand ??

[B.L.Z.BUB]

lightened flywheel? What gearbox? Diff? Ratios?

[coln72]

It wont spin 195's....... My 5k would turn 225/60/13's (usually only a single spinner :( )

[altezzaclub]

Well, if 1/4mile is the main thing in your life, start specialising in it.

 

Work out which diff ratio you need to get off the line cleanly and still minimise the gear changes. Make sure the final gear you're in is pulling max power just at the end.

 

If the car is going off the road then you can lighten it a lot, right down to where we cut the door hinges into hollow shapes with an Abra file, just leaving the rim to hold on the single-skin gutted door with a plastic window.

 

More power comes from narrowing the rev range, so bigger cam and bigger carbs, and less driveability. When Nissan sponsored us we could have their factory engineer build a motor, and that really flew, so there might be a lot left in the motor that someone can find for you.

 

17sounds terribly slow, but I'm sure I'd need a clock not a stopwatch if I tried my car!

[coln72]

If the car is going off the road then you can lighten it a lot, right down to where we cut the door hinges into hollow shapes with an Abra file, just leaving the rim to hold on the single-skin gutted door with a plastic window.

 

 

Yeah, get creative. Going light can be cheap, only costing time. As an guide, there was a KE2* in Melbourne that was down to 650kg. don't they say that every 10kg you remove from a car shuld be worth 0.1 sec down the quarter? Or is it 100kg????

 

I remember a story on an old mag where they took a stock standard 120Y and got its quarter mile times down to 14 or 15 sec without touching the motor. They just started removing weight. All that was left was the floorpan, drivetrain and a seat though..... :wink:

[towe001]

Free horsepower you say ?

Have a read. Its from the VWVortex forums decades ago.

How to get your econobox into the 14's-A must read

 

Damn shame about the forum ditching the pictures.

 

Basically they got a nissan pulsar in its ricer form

 

And removed some weight

 

And removed some more weight

 

16.3sec @ 84.0mph

down to

14.3sec @ 93.2mph

 

 

 

Hey, its an option :laff:

[coln72]

Thats exactly what they did to the 120Y about 16 years ago :wink: It was in Car Australia for those of a more senior age.

[towe001]

<goes off to dig through a huge pile of car mags>

[springersrolla]

dyno??

[philbey]

You'll drop a second off with the same motor in a ke10. There was an article posted up here about a bloke who drag raced his ke10.

 

Like mentioned, you should start looking hard at your power curve and diff ratios and make sure it's matched correctly.

 

If you havent had it dynod then you're wasting your time as well. Definitely dyno it.