Tyre pressures at the track

[brad24]

What sort of tyre pressures should I be using at the drags on my XT?
Cheers Brad

[prasac]

what sort of tyres are you running? weight? hp?

[XT302]

Details of his car here

http://www.fordforums.com.au/showthr...9&page=2&pp=30

[prasac]

your best bet is to get a set of M/T Street Radials don't race on the street tyres.

[brad24]

Originally Posted by XT302

Details of his car here

http://www.fordforums.com.au/showthr...9&page=2&pp=30

Thanks XT302

I was planning on running the MT street radials, sorry I should of mentioned that. the car would be around 480 - 500 HP & I reckon about 3600 lbs with me in it
So what pressures do you think would be best?
Cheers Brad

[xagsjoe]

15-18psi mate. Outside these ranges won't do much good. Checkout the M/T website for their bulletins and reccomendations.

[brad24]

Thanks Joe
& for anyone else who wants to know
http://www.mickeythompsontires.com/tech.php?bulletin=s3

[xagsjoe]

Are you going to invest in some caltrac's or slapper bars? They are a good investment. I went a 1.48 60ft on oztracs this last wknd so they help hook you up

[brad24]

Originally Posted by xagsjoe

Are you going to invest in some caltrac's or slapper bars? They are a good investment. I went a 1.48 60ft on oztracs this last wknd so they help hook you up

Ive bought a spare set of convo rears to put the MT street radials on.
I figured Id run with them first & see what happens.
How much are oztracks & where do you get them from?
Ive never driven a car down the chute but I have had my current bike & my last 2 down there with a best time of a low 11

Any advice for a first timer would be appreciated

Cheers Brad

[brad24]

What are the Macdonald Bros version like?
http://www.mcdonaldbrosracing.com.au/trackrods.html

[XT302]

Originally Posted by xagsjoe

15-18psi mate. Outside these ranges won't do much good. Checkout the M/T website for their bulletins and reccomendations.

Brad this one doesnt run anywhere near these pressures (22-24 rings a bell) , using slidealinks though

http://www.fordforums.com.au/showthread.php?t=11258423

[Ivan]

I'm running 18psi and can go to 14 if I have to but only on the strip.



Ian

[rusty 351]

Originally Posted by brad24

What are the Macdonald Bros version like?
http://www.mcdonaldbrosracing.com.au/trackrods.html

there nicely made and rays good to deal with,

i bought those then got some 10mm lower plates made up to weld the rear mount to.
dont forget to reinforce the rear spring perches as well to stop them breaking off

[brad24]

Originally Posted by rusty 351

there nicely made and rays good to deal with,

i bought those then got some 10mm lower plates made up to weld the rear mount to.
dont forget to reinforce the rear spring perches as well to stop them breaking off

Rusty
Were the macdonald brothers version of the traction bars a "bolt up fit" or do they need some mods to fit?
Cheers Brad

[rusty 351]

Originally Posted by brad24

Rusty
Were the macdonald brothers version of the traction bars a "bolt up fit" or do they need some mods to fit?
Cheers Brad

apart from welding the rear tabs to your lower leafspring bracket they just bolt in,
although i did have to grind a bit off one of the bolt heads either side because it was just touching the chasis rail when it pivoted.

just check that when you bolt it all in to dummy up where you need to weld the rear mounts too. (weld the brackets so you have plenty adjustment either way so you can back them off or put a few turns off preload on the leaf)

[XT302]

So when do you plan to give the track a touch up ?

[brad24]

Originally Posted by XT302

So when do you plan to give the track a touch up ?

Tomorrow week if everything goes to plan. I bought a set of MT ET streets in 275/50/15 But they were rubbing badly on the passenger side. I changed the wheels to another set with 1/2" more backspace & got the guards rolled today & now they arnt rubbing.
I'll let you know how I go.
Cheers Brad

[XT302]

Sounds sweet a much wider radial than Blocker runs (235/60/15) enjoy your racing :-)

[63futura]

Originally Posted by brad24

Tomorrow week if everything goes to plan. I bought a set of MT ET streets in 275/50/15 But they were rubbing badly on the passenger side. I changed the wheels to another set with 1/2" more backspace & got the guards rolled today & now they arnt rubbing.
I'll let you know how I go.
Cheers Brad

Where did you get ya guards rolled and what did it cost ??
Looking at doing the same thing

[brad24]

Originally Posted by 63futura

Where did you get ya guards rolled and what did it cost ??
Looking at doing the same thing

Sam @ Vulcan panel in Canning Vale did the work for $200
Seems to know his stuff
He runs a EK that does 9.1

[dieseltrain79]

Dont run any less than 14psi in ET Street Radials . They will start to loose traction and your 60' will go backwards .

I always run 16-17psi in mine .