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Technical Questions

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The place for technical discussions. Carburators, ignition systems, etc.

How to Use and Interpret a Vacuum Gauge

This was pointed out to me by Walter Higgins and the original site is gone. So he found it in the way back machine and I'm gonna repost it here. Originally from "Second Chance Garage". Very important and interesting. The original site may s

Last reply by alsancle · Oct 1, 2025

Houston, We have a REO Royale transmission problem!

I didn't mention it before but when we were pulling out of the parking lot for the Pebble Beach tour all of a sudden the transmission started making horrible noises. It would sort of come and go. Although never completely go away. I was ver

Last reply by tom1980 · 3d

Engine head torque amount.

Can anyone tell me how many foot pounds one should torque the 28 headbolts on a Royale engine to? Carleidsness @gmail.com

Last reply by ShawnG · 2w

Modern Part Numbers for Distibutor Components

EDIT: This was originally posted by "MPeters" in the old forum. It should go in the tech session an I will copy or move it later - A.J. Following are modern part numbers, I have used for REO Royale Distributor: NAPA O'Reilly POINTS CS778A/C

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Last reply by alsancle · Jul 29

Factory Rear End Ratios

Does anyone know what the available rear end ratios on the Royale were? Has anyone ever done a high speed gear project or is it unnecessary?

Last reply by alsancle · Jul 24

The Tire Thread

So both John and I are stuck trying to find tires. I was in love with the Bedford 700-18 blackwalls which John foolishly took as my recommendation and bought a set of. Now that he has mounted them we find that their 33.25 inch diameter is j

Last reply by alsancle · Jul 9

Testing a Royale Dual Point Distributor on a Machine

As we get my car ready for Pebble next month one of the things we wanted to do was get the distributor on to the machine and synchronize the dual points. In this topic I'm going to go through the process with pictures and video. The machine

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Last reply by alsancle · Jul 8

Schleber Carburetor Fuel Leaks

Fuel pouring out of the bottom of your carburator is a common problem. First try water pump packing on the two holes where the jet adjustment is. If that doesn't work try this: The two holes on the bottom of a Schleber Duplex are for adjust

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Last reply by JohnGPhillips · Jul 7

Transmissions

Here are pictures of the 4 speed that is in my car. We have a thread over in the AACA forum where I tried to identify the manufacturer: https://forums.aaca.org/topic/248158-identify-maker-of-this-prewar-reo-royale-4-speed-transmission/Folks

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Last reply by alsancle · Jul 1