Jump to content
SAU Community

1st Drag this Friday, help :)

Blade

By Blade,
in Motorsport Discussion & Builds

 Share

Recommended Posts

Blade Experienced

Blade

Posted
Posted

Well this friday im going to calder for the 1st time to test my car down the 1/4

Here are my setup:

14psi

Full 3" Straight through exhaust

GCG Highflow turbo

FMIC

Bosch pump

Dunlop sp 9000's 255 rear , 235 front

Rock hard height/dampening adjustable coilovers (dont know wat brand)

and im running a chipped ecu at 14psi, not sure what rwkw it has.

My problem is, on stock boost i can launch fine and quick with only "axle tramp" feels like its bunny hopping in 2nd then i regain traction,

Once i boosted it to 14psi i try to launch, pop the clutch at 3000rpm 1st gear is all wheel spin, 2nd gear is all wheel spin, 1/2 of 3rd gear is all wheel spin.

I realise now i have to slip my clutch till i feel complete traction, however im not sure what the correct launching RPM is. Is their anyway i can pop the clutch and still gain traction?

On a closed road at my farm i dragged my workmates stock wrx. He blew me away at the start as i was wheel spinning till i hit 3rd, then i caught up neck and neck just before the 1/4 ended, i cant do this at calder...any advice? Is my suspension too hard? Or should i simply slip the clutch ... its too hard to practice by myself as i cant test against another car and im back in the city.

Oh and when i did a granny launch like a normal start, he still; blew me away at the start and then in 2nd i was axle tramping again! like bunny hopping/wheel spinning...i cant stop it, 3rd gear is my strongest gear as i get full traction and the 14psi makes up for my lost wheel spinning time...but by then the 1/4 is over

Any advice would be much appreciated, so i can prepare for friday night :):)

Link to comment
https://www.sau.com.au/forums/topic/62462-1st-drag-this-friday-help/
Share on other sites
knore Grand Master

knore

Posted
Posted

Ide say alot of its your suspension/camber settings

get these in order and youll be able to put all the power to the ground

also, running a gcg hiflow at 1bar will be somewhere around 240rwkw, have u still got standard injectors? and if you havent got any dyno tuning done then your dis-advantaging yourself

Blade Experienced

Blade

Posted
  • Author
Posted

Cheers for the replies, drag radials? i can get my hands on a set of mickey thompsons, well the guy at work said his mate runs a tyre business and hell lend me mickey thompsons, ive never heard of them in my life? are they drag radials?

I have also ordered a set of pineapples to be installed on friday, as i read in previous threads they reduce axel tramp

I still have standard injectors, and i did have a dyno tune when i had the stock fuel pump and the tuner entered in values for my High setting and Low setting but said he couldnt continue cause my stock fuel pump was weak and dying,

when i got my bosch fuel pump installed i ran the high setting and boost holds at 14.7 Psi or just under? It doesnt feel laggy and the spool is mega loud...am i running too much psi? i go through a whole tank of fuel in no time...its ****ed :)

halz Collaborator

halz

Posted
Posted

I had severe axel tramp the same as what you are talking about.

I got some alloy rear subframe bushes (metal versions of the poly pineapples from whiteline) and it was a WORLD of difference. For ~$100 you will be very surprised the difference that they will make, especially for launching.

I installed them myself, all you need is a jack etc. and around an hour - there are HOWTO's on the web and other places.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Dose Pipe Sutututu
      NC MX5

      By Dose Pipe Sutututu · Posted

      Lamb roast on Saturday will be different 🥲
    • TurboTapin
      RB25DET with solid lifters - which cams ?

      By TurboTapin · Posted

      They are under bucket shims. Tomei provides a test shim kit and then any measurement of shim required. 
    • GTSBoy
      RB25DET with solid lifters - which cams ?

      By GTSBoy · Posted

      I always wondered how you were supposed to buy a set of 24 buckets and somehow magically have every single one of them yield exactly the desired clearance. I would have thought you'd need to assemble a cam with either 12 "sample" or "example" buckets of known top thickness (or a single such sample/example 12 times over!!) measure clearances at every valve, and then do the usual math to work out what the actual "shimness" of each bucket needed to be, before buying the required buckets to make up he thicknesses that you didn't have on hand.
    • TurboTapin
      RB25DET with solid lifters - which cams ?

      By TurboTapin · Posted

      I now seem to be limited in power due to my rev limit/hydraulic lifters in my built RB25. I'm looking into converting over to Tomei solid lifters. Question for anyone that has done the conversion. I was always under the impression that when using the Tomei solid lifter conversion, you would also require new valves (Longer or shorter stems, I can't remember which).  I don't know where I got this idea, as so far I see no mention of this in any of the Tomei documentation. It just states I need the Tomei solid buckets, solid lifter cams and upgraded springs. As my head is already built, all I would need is another set of 1000$ Kelford cams, 500$ buckets and about 4H hours of my time installing and I'm off to the races!?!? There's no way it's that simple, I must be missing something? 
    • TurboTapin
      Why am I hitting a power wall with my stroked RB25?

      By TurboTapin · Posted

      I couldn't agree more. I should have started from the get-go with a NEO or solid bucket conversion. I started looking into converting over to solid lifters yesterday. Now for some reason I was always under the impression that when using the Tomei solid lifter conversion, you would also require new valves (Longer or shorter stems, I can't remember which).  But I see no mention of this on any of the Tomei documentation. It just states that I need the Tomei solid buckets, solid lifter cams and upgraded springs. As my head is already built, all I would need is another set of 1000$ Kelford cams, 500$ buckets and about 4H hours of my time installing and I'm off to the races!?!? There's no way it's that simple, I must be missing something? 
×
×
  • Create New...