chevyguy3

iTrader: (4)

dont know if anybody here has experience with it, but do you think its worth the $100 to have my 35 spline axles gun drilled to cut down weight?

kent

From what I have read, yes. I am not an expert on this, but it is my understanding that the lighter the rotational weight is on the car, then faster the car will be. Also, the lighter weight causes less stress on the drive-train for drag racing. For each 10 pounds you take of rotation weight, it is like taking off 17.5 pounds off of the nonrotational weight on the car. Anyway, it is a good thing if you drag race. I do not know wheter it is good for the street or not, I have no experience jet, with this. <img src="gr_stretch.gif" border="0">

Colonel

Gun drilled axles will be at least somewhat weaker than solid axles but they will be, of course, lighter. How much is a little weight worth to you (consider all of the ways that you can spend money to lose weight!)?

If I were going with drilled axles I would go one up on the splines. For example, if I needed 31 spline axles I would go to 33 for drilled.

FlamingTA

iTrader: (8)

Ya, he said he would be doing it to 35-spline axles. I don't think there is any way in hell you are going to break a 35-spline axle even if they were gun drilled. I have 35-spline axles in mine and I know I will not break mine. Where would you go to have it gun drilled?

chevyguy3

iTrader: (4)

yeah, i would be doing it to the Moser 35 spline axles i have in the car now. im not looking to cut down on the car's weight, just looking at cutting down the drivetrain weight. im just not familiar with how much a couple pounds of rotating weight in the rearend would really help out performance/part strain

JimmyKash

every 1lb lost from rotating weight = 1.5-2lbs of static weight

lose 10lbs from both axles, is like losing 15lbs static weight

Terry Burger

iTrader: (4)

How much weight does gun drilling save? Since the mass is so close to the rotating axis does it really do much?

Colonel

It basically IS the rotating axis! The farther away from center the weight is, the more you stand to gain by getting rid of it. In this case, not much.

Colonel

I know Moser does axle drilling.

35 splines will be PLENTY strong! <img src="gr_images/icons/cool.gif" border="0">

Jim98WS6

[quote]Originally posted by FlamingTA:
<strong>Ya, he said he would be doing it to 35-spline axles. I don't think there is any way in hell you are going to break a 35-spline axle even if they were gun drilled. I have 35-spline axles in mine and I know I will not break mine. Where would you go to have it gun drilled?</strong><hr></blockquote>

Can they be drilled after they are heat treated? <img src="images/icons/confused.gif" border="0">
-Jim

MIGHTYMOUSE

iTrader: (59)

i would spend the 100 somewhere else.. maybe buy a diet book and diet food to loose the few#s you'd save from the axles.. and you'd be healthier. <img src="gr_grin.gif" border="0">

im sure moser/strange do special metal axles like an alloy or titanium stuff?

Red2000SS

[quote]Originally posted by Terry Burger:
<strong>How much weight does gun drilling save? Since the mass is so close to the rotating axis does it really do much?</strong><hr></blockquote>

Pay attention, Terry actually made a post without insulting / pissing anyone off! <img src="gr_stretch.gif" border="0"> LOL

I agree with Terry, the mass is so close to the center that it will not make much of a difference.

The whole idea that X amount of rotating mass is equal to 1.5X non-rotating mass (or whatever constant factor anyone wants to claim) is BS.

For instance, you could have 2 sets of wheels / tires that weighed exactly the same, but had quite different polar moments of inertia - it all depends on where the mass is located.

I suggest that instead of going through the expense of rifle drilling your axles, you just take a dump before your run - the results would probably be similar and you might feel better <img src="gr_grin.gif" border="0"> LOL.

[ February 07, 2002: Message edited by: Red2000SS ]</p>