Nathans F15A Resto

[Jacques Reed]

Originally Posted by Keith Webb

Great to see you're getting stuck into your project.

It's worth checking the diff ratios (stamped on the front of the diff housing) to see if they're the high ratio for 16" wheels or the lower ratio for 20" wheels.

Hi Nathan,

You may already know this but it may be of use to you and others. the attached photo from an earlier post shows the numbers Keith was referring to.

"639" is 6 teeth on pinion and 39 teeth or ring gear giving a drive ratio of 6.50:1 F15-A

"643" is 6 teeth on pinion and 43 teeth or ring gear giving a drive ratio of 7.16:1 All larger CMP's with two speed transfer cases and 20" wheels.

Hope this is of some help to all.

Cheers,

[Nathan O'Malley]

Gday Jacques

Thanks for the info mate ill have a look at the diffs over the weekend and see what's on them

[Ken Smith]

Thanks Nathan,I will give Supercheap a go tomorrow, and look for a Blackridge kit. I have a near new, engine driven 3 cylinder Clisby compressor. I am counting on it keeping up with the short bursts I will be using it.
Mike C your helpful comment on the cabinet blaster has made me think about the bead blaster at work, that little thing has done years of glass bead blasting. I think if the Blackridge blaster doesn't do the job then I will get a bead blaster hand piece and modify it to a sand blaster.

[David Herbert]

The key to blasting is you must have a compressor that will keep up with the air consumption and maintain 100psi / 7bar. Obviously a large resevoir helps but even blasting small components will empty a large resevoir amazingly quickly. Once the pressure drops you are just making dust to no real benefit.

David