Anyone know an engineer?
06 January 2009, 02:37 PM
#1
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Anyone know an engineer?
Picked up some rims but the offset is incorrect....
They are ET 37, but stick out about 3mm too much so need the inner face milled....
They are ET 37, but stick out about 3mm too much so need the inner face milled....
06 January 2009, 02:59 PM
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Ia ..
Speak to Knowlesy @ XS , They have a machine shop that can gets these milled down for you , I Had a similar problem with my WRC Wheels
Speak to Knowlesy @ XS , They have a machine shop that can gets these milled down for you , I Had a similar problem with my WRC Wheels
06 January 2009, 03:12 PM
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06 January 2009, 03:14 PM
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06 January 2009, 03:25 PM
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06 January 2009, 09:36 PM
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07 January 2009, 08:47 AM
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The main issue I think might be that the thickness of material "on thread" would be reduced from approx. 10mm to 7 mm?
Need a wheel guru to tell me if this is ok
Need to sort them as they look so good
Last edited by bibo_boy; 07 January 2009 at 09:04 AM.
07 January 2009, 01:31 PM
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07 January 2009, 01:42 PM
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07 January 2009, 02:22 PM
#15
should be able to pop down there in your lunch hour. a nice long lane joins Dunton to their place 
if you exit dunton by the dealership, onto the round about and it's the second exit, first right. just watch out for the speed bumps towards the end when it gets a bit residential. then you'll see them as soon as you get to the end of the road.
if you exit dunton by the dealership, onto the round about and it's the second exit, first right. just watch out for the speed bumps towards the end when it gets a bit residential. then you'll see them as soon as you get to the end of the road.
08 January 2009, 09:38 AM
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Are you confident that this is safe?
I'm assuming the manufacturers decided that this part of the wheel should be this thick for a reason, if you are then going to skim them and make them thinner whats to stop them becoming weaker?
I wouldn't want a wheel coming off at speed.
I'm assuming the manufacturers decided that this part of the wheel should be this thick for a reason, if you are then going to skim them and make them thinner whats to stop them becoming weaker?
I wouldn't want a wheel coming off at speed.
08 January 2009, 09:53 AM
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Are you confident that this is safe?
I'm assuming the manufacturers decided that this part of the wheel should be this thick for a reason, if you are then going to skim them and make them thinner whats to stop them becoming weaker?
I wouldn't want a wheel coming off at speed.
I'm assuming the manufacturers decided that this part of the wheel should be this thick for a reason, if you are then going to skim them and make them thinner whats to stop them becoming weaker?
I wouldn't want a wheel coming off at speed.
not wanting to scaremonger or anything, but there is generally some very specific calculations made with regard to castings and tolerances, and lets say for instance the wall thickness is 10 mm, this is now being reduced my 40% and given the impurities of castings in my experience, i wouldn't take the risk.
also, what heat treatment is suffered from the machining? this again can alter the crystaline structure of trhe alloy and cause issues.
its worth measuring the wall thickness to get a percentage or even emailing the manufacturer for advice.
having said all this, you are probably reducing the lateral load quite considerably over, say a subaru's loading, so might not be cause for concern (softer spring rate, longer suspension travel, and front wheel understeer !!!
just some food for thought mate !
08 January 2009, 10:58 AM
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I'm fairly confident that Tissy, Moley and I have the same view on this one mate...
Lets say you've been a bit spirited and got plenty of heat into the hub from some decent braking, you hit a larger than expected pothole and due to the weakness in the your wheels they crack/fracture and come off hitting an oncoming car (or worse).
The police will come along and forensically examine your car, they "might" spot the work you've had done. I say "might" as I assume they will painted black again after the skimming and will be hard to spot.
Your insurers will probably not approve of your "modification". I am not sure if you were going to notify them or not, I assume that you were but plenty of other people wouldn't. You then run the risk of them not paying out for your claim or seeking to recover any outlay that they HAVE to pay from you.
I would find it hard to defend you in either criminal or civil proceedings for negligence.
I really don't want to put a downer on this for you, particularly when my engineering experience is non-existant, but I'm not sure that this is a good idea mate.
Lets say you've been a bit spirited and got plenty of heat into the hub from some decent braking, you hit a larger than expected pothole and due to the weakness in the your wheels they crack/fracture and come off hitting an oncoming car (or worse).
The police will come along and forensically examine your car, they "might" spot the work you've had done. I say "might" as I assume they will painted black again after the skimming and will be hard to spot.
Your insurers will probably not approve of your "modification". I am not sure if you were going to notify them or not, I assume that you were but plenty of other people wouldn't. You then run the risk of them not paying out for your claim or seeking to recover any outlay that they HAVE to pay from you.
I would find it hard to defend you in either criminal or civil proceedings for negligence.
I really don't want to put a downer on this for you, particularly when my engineering experience is non-existant, but I'm not sure that this is a good idea mate.
08 January 2009, 11:06 AM
#23
the guys down at dgt will know their stuff. they wouldn't be able to do it all the time if it was unsafe surely. or at least have to ask you to sign a waiver?
i've read of far more material being taken off a wheel. one thing also to consider is surely the manufacturer will have made the wheels outside of minimum tolerances?
all valid points mentioned above though that i wouldn't have even considered if they hadn't been mentioned. bibo if the machining turns out to be a no go what about getting the arches rolled instead to give clearance.?
i've read of far more material being taken off a wheel. one thing also to consider is surely the manufacturer will have made the wheels outside of minimum tolerances?
all valid points mentioned above though that i wouldn't have even considered if they hadn't been mentioned. bibo if the machining turns out to be a no go what about getting the arches rolled instead to give clearance.?
08 January 2009, 11:08 AM
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Taken from the OZ website..
"Precision is of the utmost importance in the O·Z workshop where wheels are milled, turned and bored. The profile of the rim, ribbing, disc, centring and the holes for bolting to the hub are machined on precision equipment which enables the strict tolerances required to produce a top-quality product to be achieved."
Hhhmmmm
"Precision is of the utmost importance in the O·Z workshop where wheels are milled, turned and bored. The profile of the rim, ribbing, disc, centring and the holes for bolting to the hub are machined on precision equipment which enables the strict tolerances required to produce a top-quality product to be achieved."
Hhhmmmm
08 January 2009, 11:27 AM
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I know what you guy's are saying..... I'm still 50:50
From what I can gather, 3mm is the max. that can be "safely" removed ?????
This process is quite common (apparently)?
Tiny... What did they say when you had yours done?
From what I can gather, 3mm is the max. that can be "safely" removed ?????
This process is quite common (apparently)?
Tiny... What did they say when you had yours done?
08 January 2009, 12:25 PM
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You may also find that the wheels change the scrub radius of the front end geometry, which will have a noticeable effect on handling and torque steer.
Just because other people have done it before is not a good enough reason to convince me to do it.
Personally I would want to know machining the metal off was safe, and the change in geometry wouldn't mess up the handling before proceeding.
Just because other people have done it before is not a good enough reason to convince me to do it.
Personally I would want to know machining the metal off was safe, and the change in geometry wouldn't mess up the handling before proceeding.