I have noticed every set of wheels I have, at least one has a small dip or wave inside the wheel bore. Has anyone else noticed this on their wheels? If so are they OK to run. I'm assuming it's from the mold process? Thanks.
Wheel Bore
- Thread starter Hogans Racing
- Start date
Yep they are on a ton of bores. Prefectly fine to run. In fact my fastest SS last month had the center dip 2 of the 3 wheels.
A slight bit off the topic at hand, but still regarding wheel bore. What is optimal wheel bore to axle clearance? What dimension has experience proven to work best?
5/1000. You need Measuring Pins to check the bore. Calipers or for the axles
For pins, you need 5 for the .092 axles, and another 5 for the .084.
Measure the bore first. If it is .095, choose an axle that is .090.
You should have Measuring pins of .093; .094; .095;.096; & .097.
If your bore is a bit large (or small) you can compensate by using larger or smaller axles. (which you make by sanding (or not) with a Dremmel.
If your bore is greater than .097, you have used too much polish #1 on the bore, and it would be hard to compensate with an axle (i.e. if the original unpolished axles is .092, it would not lend itself too enough polish.
However, each car in each class is different. experiment with .004 OR .006 clearance (i.e. different axles), test time, and see if that car runs better with more or less clearance.
For pins, you need 5 for the .092 axles, and another 5 for the .084.
Measure the bore first. If it is .095, choose an axle that is .090.
You should have Measuring pins of .093; .094; .095;.096; & .097.
If your bore is a bit large (or small) you can compensate by using larger or smaller axles. (which you make by sanding (or not) with a Dremmel.
If your bore is greater than .097, you have used too much polish #1 on the bore, and it would be hard to compensate with an axle (i.e. if the original unpolished axles is .092, it would not lend itself too enough polish.
However, each car in each class is different. experiment with .004 OR .006 clearance (i.e. different axles), test time, and see if that car runs better with more or less clearance.
OPARENNEN said:
With regard to different axles, where else would I be able to source a larger or small axle other than the .092"?
Also, what amount of material removal can be expected when polishing the wheel bore, .001"? Let's go with this figure for this scenario. If "optimal" clearance is .005", lets say .001" material removal is taken during the axle polishing routine, reducing the diameter of the axle to .091". With optimal clearance at .005" you'll need to find wheels with a bore size of .095" to allow for polishing of the bore, if indeed .001" material removal is anticipated. After polishing of the wheel bore the size would increase to .096". So .096" (wheel bore) minus .091" (axle size) would give us the optimal clearance of .005" (axle to wheel bore).
My question now is, are there wheel bore sizes that small out there? If it involves me sorting through many wheels to find this select size, I have my next project at hand. As mentioned above, the .084" axle, what kind of wheel is being used for this axle?
I like to run wheelbores around .098. The wheels for eliminator have a .086 wheelbore so you run a .084 axle.
GravityX said:
GX, I don't have a huge amount of experience with BSA stock wheels, but I can tell you that I have sorted more than a hundred stock wheels so far using pin gauges and I haven't seen a wheel yet that a .0960" pin gauge won't fit. I have never tried rechecking a wheel after the bore is polished, I wouldn't want to scratch the bore. I do have some new but unusable wheels, I'll have to try polishing the bore on a couple and rechecking them before I toss them out. Since the bores aren't true cylinders it may prove to be one of those YMMV-type things.
To go back to the original topic... I've noticed the dips in the bores as well. Why are they of no concern? What distinguishes them from small scratches in the bore that we worry so much about?
They are usually in the middle of the bore. I don't think it matters cause this is where the axle groove is. IMHO
OPARENNEN said:
Made a mistake. 8,000 is the correct figure. Sorry if I misled anyone.
Adjustment on Pins needed: You should have Measuring pins of .095; .096; .097;.098; & .099.
I checked all my supposedly .092 axles today. I had several 89s,90, 91, and 92. But they were all DD4H's after polish. Not BSA
I don't Check the wheels .. I just polish prep and go.. Whatcha got is whatcha go unless u have money to blow and buy 8-10 sets and pick the wheels u want .. I don't ..
+1
I have never checked dia of my wheel bores! On occasion I have checked axles after polish to make sure I did not take off too much from one side of grove than the other.
I have never checked dia of my wheel bores! On occasion I have checked axles after polish to make sure I did not take off too much from one side of grove than the other.
Man OPA if your axles are any lower than a 91 you are way, WAY, to aggressive with your polishing. All mine measure the last I checked right at 92. I'm not very aggressive at all with my polishing.
Q.T.
what axels are you starting with?
the last batch of 92X's 4 sets only found 4 out of 16 axels measured 91.5 the rest were 91 maybe I need to check my calipers with my pin gauges???
what axels are you starting with?
the last batch of 92X's 4 sets only found 4 out of 16 axels measured 91.5 the rest were 91 maybe I need to check my calipers with my pin gauges???
Good advice hidden in this message from QT.
I.e. if his axle size is 92, or maybe even 91.5, then his clearance is going to probably be between 5000 and 6000. Most wheels come to you with a .097 bore. If you didn't go overboard with wheel bore polish #1, you can do the math.
I.e. if his axle size is 92, or maybe even 91.5, then his clearance is going to probably be between 5000 and 6000. Most wheels come to you with a .097 bore. If you didn't go overboard with wheel bore polish #1, you can do the math.
Quicktimederby said:
I'm glad I found this post, I just found 2 sets of wheels with the defect in them in the center of the bore. Should I use this wheel on the FDW. as apposed to the rears?
- Nov 24, 2011
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