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17 downloadsPS..The avatar is VERY FUNNY Datto!!!!
15" Superlites on LX?
Started by
_76S.L.R_
, May 28 2010 11:30 AM
38 replies to this topic
#26
_rorym_
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Posted 30 May 2010 - 03:48 PM
The Ulitmate Look.
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mustangposterweb.jpg 45.33K
17 downloads
PS..The avatar is VERY FUNNY Datto!!!!
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mustangposterweb.jpg 45.33K
17 downloadsPS..The avatar is VERY FUNNY Datto!!!!
#27
_76S.L.R_
_76S.L.R_
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Posted 31 May 2010 - 12:44 AM
Alright guys, I REALLY need some info!= andy says a few of you on here are running the CRS HQ-WB brake conversion and I need to know what calipers will bolt up onto LX with no fouling on suspension using the CRS Adaptor= do I need HQ or WB Calipers, I hear there are slight dimension differences between the various Holden calipers!?.
I will buy the CRS adadaptor,source some Torana Drum Stubs and get them modified, my brother has WB Calipers/discs but I need to know if these are best or HQ = HELP!!!
I will buy the CRS adadaptor,source some Torana Drum Stubs and get them modified, my brother has WB Calipers/discs but I need to know if these are best or HQ = HELP!!!
Edited by 76S.L.R, 31 May 2010 - 12:44 AM.
#28
_niterida_
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Posted 31 May 2010 - 08:04 AM
Alright guys, I REALLY need some info!= andy says a few of you on here are running the CRS HQ-WB brake conversion and I need to know what calipers will bolt up onto LX with no fouling on suspension using the CRS Adaptor= do I need HQ or WB Calipers, I hear there are slight dimension differences between the various Holden calipers!?.
I will buy the CRS adadaptor,source some Torana Drum Stubs and get them modified, my brother has WB Calipers/discs but I need to know if these are best or HQ = HELP!!!
Maybe best to start a new thread with a more appropriate title ?
#29
Peter UC
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Posted 01 June 2010 - 12:53 PM
My understanding is that the HQs are cast iron and therefore are the most compact, have the least amount of flex, should have the largest range of pads but are the heaviest.
#30
_rob350hatch_
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Posted 01 June 2010 - 02:38 PM
just out of curiosity im yet to experience any bump steer with any of my toranas coverted to hq.and the roads we live on out here are goat tracks. as for the camber issue once again no problems both these cars get raced and driven on the roads without any dramas at all.there must be other issues that cause this bump steer thing anyway no expert just my experiences over several yearsIt is well documented that HQ stub axles with LX Torana arms increases bump steer.
Harrop reproduction A9X steerings arms should be used with HQ stub axles. If you can not afford the Harrop arms then UC arms are the next best option. The HQ stub axle also lowers the ride height 25-30 mm.
The HQ kpi is 7 and the Torana kpi is 9. This increases camber which is good for the track but may make it improssible to get a reasonable camber for the street.
I have also read that the HQ stubs will increase track by 50 mm.
The cheapest brake upgrade for the LX is to have fit a HQ style caliper to the Torana stub axle and machine HQ rotors to suit.
This is the setup on a Perth car from this thread. I think you can still buy blank HQ rotors and drill to Torana pattern if required. This car has HQ pattern.
#31
_rorym_
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Posted 01 June 2010 - 02:56 PM
^^^ What he said..I never experienced bump steer on either car as well...tho every one says it exists...had it in front wheel drives...never a rear wheel drive. Maybe my 3 degrees negative negates it..?
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Edited by rorym, 01 June 2010 - 02:57 PM.
#32
ls2lxhatch
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Posted 01 June 2010 - 06:10 PM
If bump steer was not an issue with the HQ stubs then why would Holden spend the time and money on designing the steering arms for a handful of cars?
A car with zero bump steer (if one exists) will handle better than a car with bump steer. Whether the you can tell the difference between and car with bump steer and one without would depend on many variables. Bump steer is measured using wheel alignment equipment not road testing.
Rory, from memory you have UC steering arms. The UC arms are closer to the A9X arms so the bump steer would be less than the bump steer with the LX arms.
Altering the camber and changing the upper arm pivot points will also affect bump steer.
In my opinion if you are going to fit HQ stubs then you should fit the Harrop arms. The Harrop arms will also improve tie rod end clearance. You will probably also need a new set of springs due to the height drop. Then you just have to hope that you can remove enough shims to get the camber angle right.
Pictures posted by dangerous in this thread.
Steering arms
red one on right is standard LX, middle black one is UC, left one - black with white paint splotch is A9X. Note how much lower the A9X one sits.
Side on view of same - this time with A9X one on bottom. Note that the LX one is shorter than the other two.
Comparison of UC and A9X one mounted on the A9X stub axle. Pretty close - definitely better than using an LX one.
A car with zero bump steer (if one exists) will handle better than a car with bump steer. Whether the you can tell the difference between and car with bump steer and one without would depend on many variables. Bump steer is measured using wheel alignment equipment not road testing.
Rory, from memory you have UC steering arms. The UC arms are closer to the A9X arms so the bump steer would be less than the bump steer with the LX arms.
Altering the camber and changing the upper arm pivot points will also affect bump steer.
In my opinion if you are going to fit HQ stubs then you should fit the Harrop arms. The Harrop arms will also improve tie rod end clearance. You will probably also need a new set of springs due to the height drop. Then you just have to hope that you can remove enough shims to get the camber angle right.
Pictures posted by dangerous in this thread.
Steering arms
red one on right is standard LX, middle black one is UC, left one - black with white paint splotch is A9X. Note how much lower the A9X one sits.
Side on view of same - this time with A9X one on bottom. Note that the LX one is shorter than the other two.
Comparison of UC and A9X one mounted on the A9X stub axle. Pretty close - definitely better than using an LX one.
Edited by ls2lxhatch, 01 June 2010 - 06:16 PM.
#33
_rorym_
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Posted 01 June 2010 - 06:31 PM
Correct..I do have UC UCA and steering arms on both cars...and thats why I also mentioned the big negative camber on the race cars...If I understand it correctly that would probably just about take it out..especially at 3-4 neg.
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Also..you can just see it...the UC arm has a more..hmm...flatter face where the tie rod bolts in, the LH and A9X are flat...look at the pic..you might get what I am saying...I was wondering if the off set UC upper control arms actually tilt the UC steering arm down to a lower position..very much Ala A9X arm.
If you get my drift.
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Also..you can just see it...the UC arm has a more..hmm...flatter face where the tie rod bolts in, the LH and A9X are flat...look at the pic..you might get what I am saying...I was wondering if the off set UC upper control arms actually tilt the UC steering arm down to a lower position..very much Ala A9X arm.
If you get my drift.
R
Edited by rorym, 01 June 2010 - 06:31 PM.
#34
ls2lxhatch
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Posted 01 June 2010 - 06:45 PM
The offset ball joint on the UC upper control increases caster which should tilt the steering arm up.
There are quite a few variables involved in determining bump steer, it is easier to measure than to calculate.
I want to measure the bump steer on a couple of steering setups I have. I think I have a come up with a cheap and simple method. If it works the I will post up some pictures.
There are quite a few variables involved in determining bump steer, it is easier to measure than to calculate.
I want to measure the bump steer on a couple of steering setups I have. I think I have a come up with a cheap and simple method. If it works the I will post up some pictures.
#35
View GaragePosted 01 June 2010 - 07:37 PM
Speaking of cheap and simple methods, I'm told there is a basic bracket setup that will allow you to attach a standard steering arm to one bolt hole only (presumably the front one) and tilt it downward using the bracket to mount to the rear hole. That may give a nice amount of drop to the tie rod end...?
#36
_rob350hatch_
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Posted 02 June 2010 - 02:59 AM
i take on board what you are saying but dont forget that handfull of cars were being asked/ pushed to do what no other manufacturer in the world of family sedans would even think of.ill get under and have a look maybe they are uc arms.looks like uc's are usefull for something after all!!!!(oops ive done it now run hide)heheheheheIf bump steer was not an issue with the HQ stubs then why would Holden spend the time and money on designing the steering arms for a handful of cars?
A car with zero bump steer (if one exists) will handle better than a car with bump steer. Whether the you can tell the difference between and car with bump steer and one without would depend on many variables. Bump steer is measured using wheel alignment equipment not road testing.
Rory, from memory you have UC steering arms. The UC arms are closer to the A9X arms so the bump steer would be less than the bump steer with the LX arms.
Altering the camber and changing the upper arm pivot points will also affect bump steer.
In my opinion if you are going to fit HQ stubs then you should fit the Harrop arms. The Harrop arms will also improve tie rod end clearance. You will probably also need a new set of springs due to the height drop. Then you just have to hope that you can remove enough shims to get the camber angle right.
Pictures posted by dangerous in this thread.
Steering arms
red one on right is standard LX, middle black one is UC, left one - black with white paint splotch is A9X. Note how much lower the A9X one sits.
Side on view of same - this time with A9X one on bottom. Note that the LX one is shorter than the other two.
Comparison of UC and A9X one mounted on the A9X stub axle. Pretty close - definitely better than using an LX one.
#37
Posted 02 June 2010 - 07:24 AM
The UC arms will work better/sit lower with less caster (although that won't help your handling)
#38
_rob350hatch_
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Posted 02 June 2010 - 01:05 PM
do you have anymore pics from tfest last year the orange lx was part of my club i was parked a couple away with my red hatchI wish i could say i own it but heres a pic of 2elcs green machine
Not LX but they look nice on the hatch posted above too
and they look nice on this 4 door
DSC_5966.jpg 108.04K
15 downloadsalthough come to think of it this pic may have been 08
Edited by rob350hatch, 02 June 2010 - 01:08 PM.
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