Fordmods Logo

1/4 MILE WOES :( 

 

Page 1 of 2 [ 25 posts ] Go to page 1, 2  Next

 
 Post subject: 1/4 MILE WOES :(
Posted: Thu Jul 12, 2007 8:35 am 
Getting Side Ways
Offline

Posts: 6113

Joined: 8th May 2007

Took the Mont down to the track and it only managed to pull a 15.2 with a host of probs.

In first gear, the back wheels/diff/gearbox were violently jumping up and down and when i changed into second the clutch slipped for a couple seconds. It happened every run i did. It felt like the T5 was gonna jump out of the centre console it was that bad.

Thing is, it doesnt do this AT ALL on the street and the clutch is brand new and you couldnt make it slip on the street if you tried?!!

I know the shockies are buggered, could that be part of the problem?

There was defintely 14's in this car, just trying to work out why the car went f**k crazy like it was gonna blow up??!! What could be causing this??
Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 9:16 am 
Fordmods Addict
Offline
User avatar

Age: 38

Posts: 7958

Joined: 1st Jun 2005

Gallery: 13 images

Ride: Falcon

Power: 237 rwkw

Location: Melbourne
VIC, Australia

Axle tramp, alot more traction at strip then on the street.
Yes, f**k shocks won't help.

 

_________________

ED XR8 Sprint - S-Trim, V500, 249rwkw
BF MKII F6 Tornado - 237rwkw

Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 9:19 am 
Getting Side Ways
Offline

Posts: 6113

Joined: 8th May 2007

Axle tramp? How do ya fix that?

Cause when i had the auto it never done this on the strip either?
Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 10:00 am 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 2893

Joined: 24th May 2006

Gallery: 21 images

Ride: XH B&S ute, Navara 4x4

Power: 202 rwkw

Location: Bordertown
SA, Australia

Heavier duty shocks should fix tramp (and maybe heavier springs). Also if any of the bushes in the rear suspension are cactus this won't help.
As above the reason you get more traction at the strip as against the strip is that the bitumen is purpose laid and also has traction compound all over it from the pro drag racers.

 

_________________

You'll ride a black tornado across the western sky

You'll rope an ol' blue norther and milk it 'till it's dry

Bulldog the Diamantina pin its ears down flat

Long before you take this cowboy's hat

Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 1:39 pm 
Fordmods Addict
Offline
User avatar

Age: 38

Posts: 7958

Joined: 1st Jun 2005

Gallery: 13 images

Ride: Falcon

Power: 237 rwkw

Location: Melbourne
VIC, Australia

{USERNAME} wrote:
Axle tramp? How do ya fix that?

Cause when i had the auto it never done this on the strip either?

Auto launches alot smoother then manual.

How were you launching?
What were your 60's?
As the dog said, if rear bushes are F**k it won't help either.
Change your launch around it if its that bad, either launch softer, slip the clutch more, or slip the tires more.

 

_________________

ED XR8 Sprint - S-Trim, V500, 249rwkw
BF MKII F6 Tornado - 237rwkw

Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 1:55 pm 
Getting Side Ways
Offline

Posts: 6113

Joined: 8th May 2007

{USERNAME} wrote:
[How were you launching?
What were your 60's?


Stalled it up to maybe 1000rpm and let the clutch out slow enough not to spin too much. Anything higher would just spin and shudder even more

Reaction - .570
60ft - 2.255
660ft - 9.844
1000ft - 12.809
MPH - 91.54
ET - 15.2

Booked the car into Pedders for a $14 safety check...

Yes i know they are rip offs, but as far as im concerned $14 is pretty cheap for someone to get it on a hoist and check a few things and also make sure they check gearbox/engine mounts while theyre there :wink:
Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 2:30 pm 
Fordmods Addict
Offline
User avatar

Age: 38

Posts: 7958

Joined: 1st Jun 2005

Gallery: 13 images

Ride: Falcon

Power: 237 rwkw

Location: Melbourne
VIC, Australia

What rubber?
Sounds like you need more grip if 1000rpm is all you can launch at.
Should be able to get 2.0, 2.1s.
Could also be track prep, I dunno what QLD is like but sometimes they don't do a real good job with street meets down here.
Heathcote could be a bit friendlier with the VHT.

 

_________________

ED XR8 Sprint - S-Trim, V500, 249rwkw
BF MKII F6 Tornado - 237rwkw

Top
 Profile  
 
 
Posted: Thu Jul 12, 2007 9:13 pm 
Getting Side Ways
Offline
User avatar

Age: 46

Posts: 1887

Joined: 26th Nov 2006

Gallery: 7 images

Ride: EL XR8, '08 Mondeo XR5t

Power: 205 rwkw

Location: Perth
WA, Australia

reduce tyre pressure?

 

_________________

Trickflow Street Heat top end kit, 70mm BBK TB & EGR, 24lb injectors, Underdrives & 3.73s: 275rwhp - 13.15@105mph NA / 12.37@116mph N20

When injustice becomes law, resistance becomes duty

Top
 Profile  
 
 
Posted: Fri Jul 13, 2007 12:01 am 
Getting Side Ways
Offline

Posts: 6113

Joined: 8th May 2007

Already got wide-ish rubber on the back, $200 15" Bridgestones.

Tyre pressures.... well when i had the auto i tried playing with tyre pressures and didnt notice any difference, but maybe a slightly deflated tyre might stop it from bouncing, could try?
Top
 Profile  
 
 
Posted: Fri Jul 13, 2007 12:38 pm 
Getting Side Ways
Offline
User avatar

Age: 46

Posts: 1887

Joined: 26th Nov 2006

Gallery: 7 images

Ride: EL XR8, '08 Mondeo XR5t

Power: 205 rwkw

Location: Perth
WA, Australia

The first time I took my car down the strip it was doing exactly the same as your car did. The next time I went I dropped tyre pressure in the rears by 10psi. Also letting the clutch slip a bit more too. No more bounce, just a squeak and go.

 

_________________

Trickflow Street Heat top end kit, 70mm BBK TB & EGR, 24lb injectors, Underdrives & 3.73s: 275rwhp - 13.15@105mph NA / 12.37@116mph N20

When injustice becomes law, resistance becomes duty

Top
 Profile  
 
 
Posted: Fri Jul 13, 2007 7:46 pm 
Getting Side Ways
Offline
User avatar

Age: 40

Posts: 1442

Joined: 26th Apr 2006

Gallery: 6 images

Ride: 97 EL XR6

Power: 162 rwkw

Location: liverpool
NSW, Australia

over inflated tyres caused me to have axle tramp... when im at the strip i usually lower the pressure to about 16-18 psi, seams to work well for me...

 

_________________

07 BF MKII XR6T
310rwkw @ 13psi - Tuned By CMS

Top
 Profile  
 
 
Posted: Fri Jul 13, 2007 8:04 pm 
Getting Side Ways
Offline

Posts: 6113

Joined: 8th May 2007

Yeah i have them at around 34psi.

The track was the stickiest its been since ive been going there, i think some of the trackbite was left over from a big meet couple days before.

The last couple times i was having trouble with wheelspin, and now im having trouble with the car jumping everywhere.

I would like to try again with the reduced tyre pressure idea, but the shuddering was that violent that i dont wanna do damage, it sounded like someone was smashing the side of the gearbox with a sledge hammer. :( And the clutch didnt like hooking up either.

Is it possible to do damage to the clutch/flywheel if its "forced" to slip? As its nearly new and has never slipped before that.
Top
 Profile  
 
 
Posted: Sun Jul 15, 2007 7:08 pm 
Getting Side Ways
Offline
User avatar

Age: 41

Posts: 2351

Joined: 11th Nov 2004

Gallery: 30 images

Ride: Blown XR8

Location: Melbourne
VIC, Australia

Just ride the clutch when you launch, and slip it for a second or so. So that your not copping a heap of wheelspin, your not bogging it down, and you shouldn't cop any axle tramp as you're not dumping the clutch.
Also, you shouldn't really be launching from 1,000rpm, you would launch harder just taking off from a roundabout. Try something like 3,000-4000rpm, and slip the clutch from take off.
Top
 Profile  
 
 
Posted: Sun Jul 15, 2007 8:16 pm 
Getting Side Ways
Offline

Age: 36

Posts: 4183

Joined: 30th May 2005

Ride: 1993 EB XR8

Location: BrisVegas
QLD, Australia

{USERNAME} wrote:
Already got wide-ish rubber on the back, $200 15" Bridgestones.

Tyre pressures.... well when i had the auto i tried playing with tyre pressures and didnt notice any difference, but maybe a slightly deflated tyre might stop it from bouncing, could try?


Mate, i had 235/45/17's on my ED, and still got some traction issues but iwas doing 4000rpm launches, try GOOD tyres (not Bridgestones) with some with width (Nankang NS-II are alright, 235 as a minimum) a 3000-3500rpm launch with clutch slip good, wide tyres and you should get a high 14 or low 15, but what mods have you got, and how much power is the car putting out

 

_________________

ILL60 - EF XR8, Sunroof, Ticky Kit, 19x8.5/19x11 TE37's, 347, AFr185's, TFS BoxRcustom converter, Hurst Quarterstick, huge billet cam.

OO0Y4 - BA2 XR6 Turbo, Nizpro Plenum, Process West stage 3 cooler, 4” dump, 3.5” exhaust, ID1000’s, ZF Auto - 11.8@116

Top
 Profile  
 
 
Posted: Sun Jul 15, 2007 8:18 pm 
Getting Side Ways
Offline

Age: 38

Posts: 659

Joined: 18th Mar 2005

Gallery: 2 images

Ride: WRX

Power: 132 rwkw

Location: Frankston
VIC, Australia

I thought nankang were s**t?

 

_________________

Car Killer.

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 25 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 33 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Wed Dec 25, 2024 4:07 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names