View Full Version : Help needed ID'ing an Avanti

05-18-2015, 01:59 PM
Hello I am new here; not new to Studebakers; but haven't had one in a while, looking at a 1963 Avanti.

I need some help, yes, right from the start.

Here are some numbers:

Body: RQ 3361

Engine: P55692

Frame R 4294

Cyl Head at Left exhaust manifold: 537555

Transmission: Automatic

These numbers are no mistake, I took pics of them

What am I looking at? Title says 1963. Supercharger is on the car.

Any help would be appreciated.


05-18-2015, 02:32 PM
http://www.studebaker-info.org/avantix4.html R-4294 - Allen A Deyarmin, AOAI Forum ( Nov 2013)

05-18-2015, 02:47 PM
The "Exhaust Manifold" is the Cylinder Head Casting Number for a 1960 and older V8 Engine.

The Engine "BLOCK" is '57 President "289" partial flow Engine.

This Engine COULD have been built up to at least some Avanti Specs as it is not physically a lot different than the Full-Flow Oil filter Block the Car came with with. The 537555 Heads would be Higher Compression than stock R2 Heads by about One point.

So IF it has Avanti Flat Top Pistons, which it may not have, it would net 10.25 to 1 Compression, a lot of static Compression for a Supercharged Engine.

05-18-2015, 03:29 PM
Welcome, the 63 & 64's are generally known by the frame #, in this case R 4294. If you have the car, you could request the production order or build sheet which would list all the equipment the car was "born" with on the assembly line. The later Avanti II's were know by the Vehicle Identification Number (VIN). The engine number sounds like a replacement 289 motor as the engine number for Avanti motors started with R (Non -supercharged) or RS(Supercharged) or in the Lark and Hawk series, JT - Jet Thrust (Non-supercharged) or JTS (Supercharged). I believe the prefix for the 289's was a P. You'd have to have someone more knowledgeable on the numbering of the motor to tell what year the motor is. Sounds like the motor has been replaced. The production order would verify the equipment assembled on the car when new. Good luck with the car should you get it.

05-19-2015, 08:45 AM
Thank You all for the reply's

I probably have enough information to be dangerous now. LOL

Thank You