JMAC Engine Shop
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Items For Sale

Stock Rebuilt Engines
Performance Built Engines

Stock Rebuilt Engines

I presently don't have any stock OEM engines in preparation. I have core engines I could build as a stock engine if you need one, CONTACT ME. 

Performance Built Engines

I am way behind the demand for my engines while I'm rebuilding my shop building. If you are interested in picking up one of my engines for your car, contact me. I am trying to turn out engines while doing work on my building. Those that send me a deposit are getting priority status. Your patience is very much appreciated! 
Picture
FP53868UE - (At the machine shop 2-13-2026) 
​This engine is from an MG Midget; it will also fit a Triumph Spitfire 1500. It will be for sale when completed. It will be a performance build.

Picture
FP4750UE - (At the machine shop 2-13-2026) 
This engine is from an MG Midget; it will also fit a Triumph Spitfire 1500. It will be for sale when completed. It will be a performance build.

High Performance Built Engines

I am currently building a customer Spitfire 1500 engine to be a high performance engine. 
We began work on this engine in December of 2024. It has been back and forth to and from the machine shop. When I took on this project it had already had the blocked decked but we didn't know how much. It had some aftermarket pistons of unknown origin in it. One of the pistons had come in contact with the head enough that there was wear on the side of the cylinder wall. We sleeved it and are fitting TR6 pistons. The block is being decked to bring the clearance to the head to approximately .004". 
​The head is being shaved down to achieve 11:1 compression and it will have a 275 duration cam. I am lightening the engine by using Maxpeeding rods and an aluminum flywheel. The rotating assembly will be balanced. It will have all new bearings, including cam bearings and tappets. It will have a new rocker shaft, high lift double springs, valve guides, double timing chain and sprockets. The intake valve seats will be ground to receive 1.438" valves. The center main oil gallery has been drilled out to 5/16" to accommodate better oil flow to the #2 and #3 rod bearings. The diametric clearance on the thrust washers will be .003-.005" of end float to resolve the thrust washer issue. It will be sealed up with all new gaskets and seals. The covers are powder-coated red and the block will be painted black like the picture. 
I will run this engine on my test run stand to check oil pressure and oil leaks. I will check compression numbers after initial run up To see the completion video, click here. 
If you need an engine, Contact me for prices and availability. ​
THE FOLLOWING ENGINES ARE CORES.
These are engines that could be rebuilt for you to your specs:
​Engine # FE82737E  Small journal 1296 (no head, rocker assy)
Engine # FK1850HE Large journal 1296 (block only)
Engine # FK5131HE Large journal 1296 
(block only)
Engine # FK33931UE Large journal 1296 (block only)
Engine # FM29439UE 1500 (block only)
Engine # FM32713UE 1500 (block only)
Engine # FP33475UE 1500 (block only)
Engine # CC31453HES 2500 TR6 6-cyl Complete engine, no valve cover
Engine # CC51251E  2500 TR6 6-cyl Complete engine

​​I currently only have one complete 1500 core engines available.​
​Engine # FM36809UE 1500 Head number TKC3239
Contact me for information on having one of these built for you, click here.
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  • Home
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  • Contact
  • WHAT'S NEW?
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