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good modifications for local drag races?
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Old 06 Mar 2010, 01:09 PM   #1 (permalink)
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Question good modifications for local drag races?

i have a 98 sti 5 and I want to get into local drags in the weekend. I have seen some of my friends doing various kind of modification such as fixing different ECUs, turbos etc... I need your recommendation and advices to do some effective modifications under a mid range budget. (I will be getting a performance exhaust system and D2 rally suspensions in few weeks.)
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Old 06 Mar 2010, 01:57 PM   #2 (permalink)
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Re: good modifications for local drag races?

What's your budget and how much power are you after?

The basics would be the exhaust, full de-cat (or sports cat), uprated panel filter, uprated fuel pump and a re-map to make the most of said mods.

On a V5 STi you can get an Ecutek map so that would set you back around 5-600. Expect to pay 1000 up for an aftermarket ECU incl fitting and mapping.
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Old 06 Mar 2010, 02:37 PM   #3 (permalink)
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Re: good modifications for local drag races?

As above, plus you dont need a budget to unolt the seats, trims, remove spare wheel etc etc. Weight reduction makes a huge difference !!!
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Old 07 Mar 2010, 08:22 AM   #4 (permalink)
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Re: good modifications for local drag races?

You dont need to make any modifications to take your car drag racing, jst have some fun.

Couple of tips, lower the tyre pressures to about 25 front and 23 rear (remember to pump them up again before leaving), and once the coilovers are fitted adjust the rear to softest and front to hardest.

And fit a stronger clutch!

Have some fun out there.
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Old 15 Mar 2010, 10:35 PM   #5 (permalink)
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Re: good modifications for local drag races?

Quote:
Originally Posted by jd View Post
You dont need to make any modifications to take your car drag racing, jst have some fun.

Couple of tips, lower the tyre pressures to about 25 front and 23 rear (remember to pump them up again before leaving), and once the coilovers are fitted adjust the rear to softest and front to hardest.

And fit a stronger clutch!

Have some fun out there.
i'll keep those tips in mind JD. , may come in useful some day
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Old 16 Mar 2010, 09:07 AM   #6 (permalink)
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Re: good modifications for local drag races?

Decent tyres help, but it all about having a laugh.
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Old 16 Mar 2010, 12:55 PM   #7 (permalink)
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Re: good modifications for local drag races?

hi. thanks for all replies.

Quote:
Originally Posted by rikimaru View Post
What's your budget and how much power are you after?

The basics would be the exhaust, full de-cat (or sports cat), uprated panel filter, uprated fuel pump and a re-map to make the most of said mods.

On a V5 STi you can get an Ecutek map so that would set you back around 5-600. Expect to pay 1000 up for an aftermarket ECU incl fitting and mapping.
I believe that i will be able to compete with other evo s and stis if i can tune my car to get a power around 350-400bhp. dont have a specific fixed budget since i dont know much about STI upgrades, i bought this (my first subaru) very recently. but i would go for the mid range parts if the performance difference is considerable same.

one of my friends will sending me a custom made exhaust system and D2 rally suspension.

I wan to do modifications without having side effects on the car (either short or long term)

can someone please tell me a name and model of a good racing clutch and an ECU ?
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Old 16 Mar 2010, 02:18 PM   #8 (permalink)
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Re: good modifications for local drag races?

Hi bud, Which drag strips will you be using ? As I go to a few meets myself. Will be going to york drag way on easter monday, Not to race this time though . Of down with a few mates with imprezas . I will have to keep an eye out for you.
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Old 16 Mar 2010, 06:09 PM   #9 (permalink)
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Re: good modifications for local drag races?

I am about to fit a Helix paddle clutch good for 450lb/ft.
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Old 16 Mar 2010, 06:32 PM   #10 (permalink)
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Re: good modifications for local drag races?

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Originally Posted by jd View Post
I am about to fit a Helix paddle clutch good for 450lb/ft.
thanks. I was googling to find more information about the clutch plate you have mentioned. and then found this page.

Helix Paddle Clutch Kits Subaru WRX-STI

first i want to start modifications at a basic level and then to increase. are those clutch plates good for any level of power deliverd by the engine? (such as stage 2 ) ?

and also, im a little confused about the different stages in modifying.


@Skip. hey mate.. that would be awesome. but I'm living in the other side of the world (assuming you are from USA)
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Old 16 Mar 2010, 06:39 PM   #11 (permalink)
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Re: good modifications for local drag races?

Stages of modifications bean bugger all anymore.

Subaru - PartBox Online

Speak to these people, this is the online shop for Home | Co-ordSport Performance Parts who know a thing or 2 about tuning. If you pick one of the clutches there is a torque rating listed.

Work out how much power you are aiming for, then get the clutch to suit. Note it is the torque that kills clutches on hard launches. I killed an exedy organic (rated at 400bhp/400lbft) drag racing launching at 6000rpm / 1.3bar boost with launch control.
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Old 16 Mar 2010, 07:18 PM   #12 (permalink)
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Re: good modifications for local drag races?

thanks jd. that link is really useful.
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Old 16 Mar 2010, 07:52 PM   #13 (permalink)
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Re: good modifications for local drag races?

btw, can someone please tell me what type of clutch comes with the STI 09.1998~1999 (version 5) ? such as ceramic organic etc?

I feel a judder when I engage the clutch at low rpm.
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Old 16 Mar 2010, 09:08 PM   #14 (permalink)
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Re: good modifications for local drag races?

Quote:
Originally Posted by dacoolest View Post
thanks. I was googling to find more information about the clutch plate you have mentioned. and then found this page.

Helix Paddle Clutch Kits Subaru WRX-STI

first i want to start modifications at a basic level and then to increase. are those clutch plates good for any level of power deliverd by the engine? (such as stage 2 ) ?

and also, im a little confused about the different stages in modifying.


@Skip. hey mate.. that would be awesome. but I'm living in the other side of the world (assuming you are from USA)
hi bud , Im in wakefield, west yorkshire. Which drag strips will you be using ?
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Old 17 Mar 2010, 05:13 AM   #15 (permalink)
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Re: good modifications for local drag races?

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Originally Posted by skip View Post
hi bud , Im in wakefield, west yorkshire. Which drag strips will you be using ?

hi.. I'm living in si lanka.
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