I was wondering if anyone e would know the inside diameter of a Speedway straight front axle. Is either the standard or the heavy duty a 1 3/4? I'm starting a gasser build and it's a really small car and I think the 2 inch axle will look like a dump truck axle under it. I figured since I. Going to have to get a custom axle and solar nobody wants to make one with a smaller tube I thought about just cutting the ends off the bigger axle and welding in the smaller tube.
Unless the engine is way far back in the car (like a dragster), then you really want a 2" axle. Which is why no one will make you a smaller one.
Yeah, I can see that but my car only weighs 1300lbs total. I figurd I'd a car like a 58 impala with a big block goes down the track on a 2 Inch axle mine should be fine with a thick wall 1 3/4 chromemoly axle.
It probably would be OK at 1-3/4". I think you'll find the tube ID of the Speedway axle is closer to 1.5", though.
will anyone even be able to visually tell the difference on 1/4" in diameter? seems like a lot of effort for nothing?
This might be of interest to you. Probably have to put an internal sleeve in and turn down the outer but it is a forging. There are a few variations. https://www.speedwaymotors.com/Weld-In-Axle-End-5-2-Inch-x-188-Inch-Wall,37949.html May Dad made a couple of these for me when I was a kid to fit '54 Chevy spindles to a homemade straight axle. I don't remember the O.D. 4130 that we used, but I think it might have been 1 7/8".
Was just looking at that specific axle. Thinking of making my 56 a gasser. The speedway axle is two inch OD with 1/4" wall thickness. To me that sounds about right. I would not go smaller. MHO.
Just for comparison, Mark Williams makes 1 1/2" and 1 5/8" tube axles with .125" and 1.88" wall thickness. Unfortunately, they will not make one longer (at least in the 5" drop). Seems like the OP isn't too far off with a 1300 lb. car. https://markwilliams.com/34004.html
The Jalopy Journal
