Five Worst Engines | Overhyped and Underengineered
DSPORT Five Worst Engines

4) Honda D-Series

D-List Performer: You’ll Always Have More Fun with Twins

Early on, the American market always seemed to get short changed when it came to performance cars from Japan. With few exceptions, USDM cars always had a lesser power plant, leaving much to be desired by enthusiasts. When America first learned of Honda’s VTEC technology, it was hard to contain the excitement and anticipation of what was to come. Then the 1992 Civic EX and Si arrived, with VTEC as anticipated but with a single overhead cam cylinder head. The 125 horsepower output certainly outshined the non-VTEC siblings found in the DX and LX trim packages. But this was still over 21-percent short of the performance that the JDM 1989 Civic SiR produced. Nonetheless, Civic sales were strong, prompting aftermarket development for the platform. What many enthusiasts discovered too late was that the D-series was the sucker’s build. Weak connecting rods, small bores, and only one camshaft to actuate the valvetrain made immediate upgrades essential if significant horsepower targets by way of nitrous injection or forced induction were to be achieved. The amount of money invested to improve horsepower with the D-series would have paid for a JDM B-series engine swap that would have formed a better performance foundation for future performance growth. Honda D-Series OPINION WHAT’S HOT: • Decent aftermarket support • VTEC version available • High availability • Free or low cost to purchase • Lightweight WHAT’S NOT: • Single camshaft does not allow lobe separation angle change • Low factory output • Low displacement • This is the Sucker’s Build – it is more costly to make power than the B-series • Weak connecting rods – can handle only minor horsepower improvements • Small bores • Needs to be sleeved in order to support power levels higher than stock

SPEC SHEET

ENGINE
Manufacturer: Honda
Years In Production: 1984-2005
Engine Code: D-Series
Displacement (cc): 1,590.6cc
Bore & Stroke (mm): 75mm x 90mm
Peak Horsepower (@ RPM): 108 bhp @5,600 RPM, 125 bhp @ 6,600 RPM (VTEC)
Peak Torque (@ RPM): 100 lb-ft @ 4,800 RPM, 106 lb-ft @ 5,200 RPM (VTEC)
Pistons/Compression Ratio: 9.1:1 (D16A6), 9.2:1 (D16Z6, VTEC)
Block Material: Aluminum
Head Material: Aluminum
Camshafts 288/292-degree VTEC (IN&EX)
Valves / Springs / Retainers: 16 Valves, Single Cam, VTEC (D16Z6, D16Z7)
Throttle Body: Single
Fuel Injectors: Top Feed, High Impedance, 190-240 cc/min (x4)
Ignition System: Distributor, Internal Coil
Applications: 1992-1995 Honda Civic DX, LX, EX, Si
1996-2000 Honda Civic DX, LX, EX
1996-1997 Honda Del Sol
Honda D-Series  

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