The particular legendary 5. 9L Cummins small brother, the 4BT Cummins motor has long been maligned in the performance market. After all, the engine is only 3 or more. 9L, how stout can it be? Properly, we’re here to tell you the solution is: very stout. Richard Dark brown, of Brown’s Diesel in Riverdale, California often marches to the defeat of a different drummer, so when this came time to replace the alcohol-burning 408ci Chevy in his 3-window sports coupe, he thought why not a diesel powered?
The problem was a 6BT (5. 9L) Cummins was just all incorrect for the application. It was too heavy plus too big dimensionally, and ‘32 Fords aren’t exactly known for extra room. So , a 4BT Cummins obtained the call. Like many projects, Richard’s Ford took on a life from the own. Originally starting with a 263-hp turned up stocker, the 4BT transferred the 2, 900-pound coupe along pretty much. After a while though Richard kept adjusting and turning up the coupe a growing number of, and eventually windowed the stock prevent. The next engine would be a full create.
The particular team at Brown’s started out having a stock block, that was equipped with the Gorilla girdle, ARP 625 mind studs, and a fire-ringed block plus head. The crank was manufacturing plant, but the rods were from Carillo, and the engine received forged pistons from D& J Precision Machine . To assist get the airflow moving, a camshaft from Hamilton Cams was set up, along with pushrods and valvesprings that will bump the valves in the stock cylinder head. The long block can be rounded out with trick tappet and front covers from Keating Machine .
Richard knew the particular small-displacement engine would need help producing power, so he went along with every trick in the book–and after that some. He started with a 12mm shot pump and some 5 by zero. 018-inch injectors, but has considering that moved up to an 800cc 13mm pump from Scheid Diesel with an adjustable gear and massive five by 0. 025-inch injectors. Given that this is a heck of a lot of energy, Richard built an equally severe turbo system for the car.
The 4BT is a smaller engine, so the turbos had to be sized accordingly. Keeping this particular in mind, Richard went with a 57mm S200 and 69mm SX-E S300, both from BorgWarner. Together, the particular turbos combine to make a whopping seventy five psi of boost. In addition to the increase, Richard also runs both water-methanol injection and nitrous on the 4BT, and quite a lot of both. The nitrous oxide comes in four stages–a 0. 035-inch spool jet, followed by three zero. 080-inch jets that are ramped within via Hobbs switches between levels as boost increases. The water-meth is also ramped in, with 2 nozzles feeding the intake car horn.
It might be “just” a 4BT Cummins, using a full-manual race valvebody having a transbrake from Goerend Transmissions , the automated behind the 3. 9L would have to be plenty stout. Luckily, Richard is really a transmission builder, so he understood exactly the direction he wanted to proceed. In addition to the valvebody, the 47RE-based tranny was fed stronger 48RE internals, as well as aftermarket shafts from Sonnax and TCS . The converter was a minor mystery, since the smaller Cummins motor made a lot less torque. In the end, these people went with an experimental triple-disc converter from Goerend that allows for extremely hard transbrake launches.