Leaderboard

1972 240Z ITS (SCCA) race ca Checkerboard car is this car. Built in California by Michael Scott and first race Spring Sprints @ Laguna Seca 4/20/1991. Raced on the West Coast for a number of years. Built as an Endurance race car, complete with Fuel Cell. Raced a number of years until it migrated to Springfield Missouri where it was raced by David Dugan 1997-2002. I purchased the car and attended Drivers School in 2007 Raced around the Southeast Division until 2023. Podium at Road Atlanta, and placed well at Roebling Road, CMP, NCM (1st place and track record for class) and Barber. Multiple Hillclimb and time trial events. Included along with the car: 18’ Open trailer, tandem with brakes on single axle 8 Enkie wheels in good condition Rebello Engine (disassembled) 2 additional Core engines that are complete Spare set of Hitachi SU Carbs 4 each 4 speed transmissions 2 each 3.90 differentials locked 2 each 3.70 differential locked 1 3.54 differential open 4.11 Quaife Limited Slip Differential (in car currently) Spare E-31 Race prepped Head Spare N-42 Race Prepped Head 2 New Camshafts (purchased from Nissan, Last 2 in inventory) Numerous spare parts, brake drums, axle shafts, brake parts, intakes etc. A TRUCK LOAD of spare body parts, suspension parts etc to include a Rear quarter clip, hatches, fenders, doors, as well as interior parts from 2 disassembled donor Z’s. OEM Windshield Glass Additional pictures upon request. And anything else I find that is Z related! $22,500.00

The window regulators are different between the two models. I also seem to remember that there's some difference in the length and/or position of a channel that the rollers of the regulator sit in. I made an early regulator work in my 260Z drivers door but it required some sheet metal modification and a change of channel (else the roller would fall out of the channel on one extreme of the up/down movement). That was years ago and I don't exactly remember all that I had to do. Eventually I went back to actual 260/280 window and regulator hardware - just know there is a difference between the 240 and the 260/280 when it comes to window and door hardware...

Hello, I checked the alternator and it looks to be a replacement from the 70-80s and is a "motorcraft" so its not original unfortunetly. I can check the glass today and let you know.

Something funny. I got in to Rockauto to eyeball some gaskets, and one of the gaskets that AJUSA (don't know who they are) sells in the carb'ed 1972 section has injector cutouts. Maybe Rockauto just made a mistake. One other thing I notice is that the intake port size is smaller for the carb gasket. Don't know if it blocks flow on an L28 EFI head or not. Something to look out for. https://www.rockauto.com/en/catalog/nissan,1972,240z,2.4l+l6,1209169,engine,intake+&+exhaust+manifold+gasket+set,10220

Well, here is the AI generated answer: "When swapping a 280Z L28E intake manifold for one used with twin SU carburetors, such as the 240Z manifold, the correct intake/exhaust manifold gasket to use is the one designed for the carbureted 240Z/260Z models from 1970–1974. This is because the 280Z L28E manifold is designed for fuel injection and features notches for injectors, while the SU carburetor setup requires a gasket without these notches to prevent air leaks. Using an EFI-specific gasket with a carbureted manifold can result in air leaks and poor engine performance, as the gasket's sealing surface does not align properly with the carburetor ports. The 240Z/260Z gasket matches the round intake ports and square exhaust ports typical of carbureted setups and is recommended for compatibility and sealing integrity. Additionally, if headers are used, stepped washers may be necessary to ensure even clamping force between the manifold and cylinder head, especially when the flange thicknesses differ." I would have said use the gasket that matches the head (and thus the injector notches) but I don't have a 240Z intake to test that on... Or a 240Z gasket to check on an L28E head.

It's no mistery. A N47 with the sensor between 5 and 6 Spark plug is from the Maxima L24e. On a L28 it is a high compression head. N47 Heads with extra CHTS sensor between Spark plugs 5 & 6 are L24 Maxima N47 heads with a "closed" 39cc combustion chamber.

From the information you posted. It looks like a 2.8 ltr N42 block with an N47 head. The 280Z would be the most common in north america. 280Z used the N42 block from March 75 to June 78. After June 78 was the F54 block. The N47 head was used from May 77 to June 80 (S30 and S130) All L24, L26 and L28 engine blocks have the code cast into the side just behind the left side engine mount bracket. I have a photo, but the site is refusing to upload🤔 site keeps kicking me out.