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SOHC-Powered Builds - Save the SOHC!

Honda Tuning magazine's favorite turbo single slammers!

Rodrez
Oct 30, 2013

Introduction by Aaron Bonk

"Honda's single-overhead-cam engine just might be more revolutionary than you think. In 1984, Honda Motor Company launched NCE (New Concept Engine), a program that resulted in the modern-day single-cam D-series engine and ultimately led to such technology as VTEC and 100-horsepower-per-liter-capable rotating assemblies. And when Honda released the first of its D-series lineup alongside its third-generation Civic, it did so to the beat of its own drum. The absence of a second cam allowed for more space and a unique rocker arm assembly. Because of this, and unlike other automakers' twin-cam engines, Honda's later SOHC D series was among the first to feature four-valve, pent-roof combustion chambers and centrally located spark plugs that together allowed for greater combustion efficiency and more power." -Aaron Bonk

Known as the underdog and written off long ago by a swap-happy community hell-bent on removing and replacing rather than digging in and building, the single cam powerplant isn't the most popular among Honda enthusiasts. Truth be told, with all of the swap options available for virtually every single cam equipped Honda in existence, starting off with a more powerful DOHC base seems like the best path to take. However, single cam fanatics will be the first to tell you that the little single slammer, when modified properly, can pack some serious firepower. Whether you're talking about the infamous D-series, or the larger displacement F-series family, there are tuning options available, and many of those options come at a lower cost when compared to DOHC engines. Of course, adding a turbo into the mix can help alleviate any shortcomings and level the playing field in rather short order.

Here's a look back at some of our favorite boosted SOHC-powered builds!

James Kempf's '92 Civic VX

Before they were smashing records on both the turbo and the all motor dragracing front, Speedfactory Racing spent some time tinkering with James Kempf's D16Z6 hatchback. Fully built and boosted using a number of high quality goods from the likes of Golden Eagle, Precision Turbo, and of course, Speedfactory's own fabrication, Kempf's D-series mill was transformed into a monster, belting out 794hp! Mid-9sec quarter mile passes had many shaking their head in disbelief. Just another day at the office for the Speedfactory camp.

D16Z6 engine
Avid Racing solid engine mounts
Precision Turbo 6765 T4 turbocharger
Precision Turbo front-mount intercooler
Custom intercooler piping
Omni Power 68mm throttle body
Golden Eagle intake manifold
TiAL Q blow-off valve
SpeedFactory exhaust manifold
TiAL MV-S wastegates (2)
SpeedFactory 4-inch downpipe
Golden Eagle sleeves
Arias 10.6:1 pistons
Eagle rods
ATI Super Damper
Bisimoto Level 3.6 camshaft
Ported, polished cylinder head
Ferrea +1mm valves
Supertech valvesprings
Supertech retainers
Injector Dynamics 1,000cc/min fuel injectors
Golden Eagle fuel rail
XRP AN fittings and lines
Aeromotive fuel filter
Weldon fuel pressure regulator
Bosch fuel pumps (2)
Koyo aluminum radiator
Skunk2 radiator hoses
NGK spark plugs
NGK spark plug wires
MSD Digital 6-Plus ignition
MSD HVC-2 coil
SpeedFactory D-to-B conversion kit
Albins B-series dog box transmission
SpeedFactory shift change holder assembly
MFactory limited-slip differential
Competition Clutch D-to-B twin-disc clutch
Competition Clutch D-to-B flywheel
Driveshaft Shop Stage 3.9 axles
Hondata S300 engine management

Power
794whp/479lb-ft torque


Tank's '88 CRX Si

SOHC powered builds tank 88 CRX si 04 Photo 4/14   |   SOHC Powered Builds Tank 88 CRX Si 04

Michael Lara, or Tank as he's known, is what you might call a single cam fanatic. His faith in the 1.6L mill is unwavering and his racecar/street car is a testament. With the help of Whitfield Racing, Lara has managed to squeeze over 620hp out of his D16Z6 and he's not finished yet. Always in search of more power, changes are constantly being made. The best thing about this vinyl-wrapped dragcar is that it regularly sees street time. That's right, just as you see it, stickers and all, the car can be seen on the streets of Socal. 10sec time slips while still being completely streetable? Sign us up!

SOHC powered builds tank CRX si D16Z6 06 Photo 5/14   |   SOHC Powered Builds Tank CRX Si D16Z6 06

D16Z6
Neptune EMS
RS Machine sleeves
Arias pistons 9.5:1
Eagle rods, big bolt
Micropolished crank
Web Cams Level X camshaft
Supertech valvesprings
Supertech retainers
Comp Turbo T3 CT5858
Skunk2 intake manifold
Blackworks 68mm throttle body
Whitfield Mfg. intercooler piping
XS Engineering intercooler
TiAL blow-off valve
Whitfield Mfg. top-mount turbo manifold
Whitfield Mfg. 3-inch downpipe
Dual 38mm TiAL wastegates
Whitfield Mfg. sump
Dual Bosch 044 fuel pumps
Injector Clinic 2,150cc injectors
AEM fuel rail
Aeromotive FPR
Aeromotive inline fuel filter
MSD wires
MSD 6A ignition box
MSD blaster coil
MSD cap and rotor
FTW Race Fuels
Induction Products front mount
'88 CRX Si transmission
Prothane shifter bushings
Clutchmasters FX-500
Clutchmasters flywheel
OBX LSD
Custom two-row aluminum radiator
Hondata boost solenoid

Power
622whp/463lb-ft torque

SOHC powered builds tank 88 CRX si exhaust 05 Photo 6/14   |   SOHC Powered Builds Tank 88 CRX Si Exhaust 05


Sheheryar Shahid's '01 Accord

SOHC powered builds sheheryar shahid accord 07 Photo 7/14   |   SOHC Powered Builds Sheheryar Shahid 01 Accord 07

While the D16 came standard in many of the Civics in the U.S., there's also a large number of SOHC F-series engines roaming the streets as well. Not to be confused with the S2000's F20C and F22C engines, the F23A1 appeared under the hood of the Accord - like Shahid's 2001 sedan. Having gone through hell while learning what not to do with his car, he eventually met the crew from Pride Performance and got to work on a solid build....one that would net over 450whp, thanks to a Garrett GT3076R snail and an array of Bisimoto Performance goods. Some interesting points to this F23 build is the use of an H22 crank to essentially de-stroke the 2.3L, as well as the use of a Hyundai Tiburon throttle body which has a very large 78mm opening. The goal was lean and innocent on the outside with a beast under the hood - mission accomplished.

SOHC powered builds sheheryar shahid accord F23A1 08 Photo 8/14   |   SOHC Powered Builds Sheheryar Shahid 01 Accord F23A1 08

F23A1
Innovative Race-spec engine mounts
H22A crankshaft
87.5mm Arias pistons
Balance shaft delete
Bisimoto custom-spec connecting rods
Bisimoto Level 2.4 camshaft
Bisimoto custom spec valves
Bisimoto valvesprings
Bisimoto retainers
ARP head studs
Garrett GT3076R turbocharger
Custom intercooler piping
Custom charge piping
Custom ported/polished intake manifold
K&N dry air filter
Hyundai Tiburon 78mm throttle body
TiAL 44mm blow-off valve
Custom turbo manifold
Custom downpipe
3.25-inch exhaust piping
HKS carbon-Ti muffler with 4-inch outlet
TiAL 44mm wastegate
NGK iridium spark plugs
NGK spark plug wires
Walbro 255-lph Ultra fuel pump
RC 770cc fuel injectors
AEM fuel rail
Custom fuel lines and fittings
Aeromotive fuel pressure regulator
Koyo half-sized radiator
5-speed manual transmission swap
PSpec short-throw shifter
Competition 6-puck clutch
Fidanza flywheel
Quaife differential
Driveshaft Shop axles
Synchrotech carbon synchros
H22 4.64 final-drive gearset

Power
456.7whp/420lb-ft torque


Kevin Gonzalez' '92 Si

SOHC powered builds kevin gonzalez 92 si 09 Photo 9/14   |   SOHC Powered Builds Kevin Gonzalez 92 Si 09

With many SOHC builders, there's a sense of pride that comes with going against the grain, avoiding swaps altogether, and Kevin was no different. He states, "I decided to build the motor rather than swapping it for a B or K because those were just everywhere-I wanted to be different. I did my homework and started collecting the right parts." In an effort to build a single cam streetcar with over 300whp, Kevin went with a Precision 5557 turbo, Bisimoto valvetrain components and 2.4 cam, as well as the ultra-affordable Suzuki Grand Vitara pistons - a well known alternative to aftermarket slugs for the D-series guys. In the end, 320whp was found at 18psi and Mr. Gonzalez is one happy SOHC savior!

SOHC powered builds kevin gonzalez 92 si D16Z6 10 Photo 10/14   |   SOHC Powered Builds Kevin Gonzalez 92 Si D16Z6 10

D16Z6
Avid engine mounts
Micro-polished OEM crankshaft
75mm Suzuki Grand Vitara pistons
Hastings piston rings
FJR-spec custom length I-beam connecting rods
Bisimoto Engineering 2.4 camshaft
Bisimoto Engineering valvesprings
Bisimoto Engineering retainers
Ported cylinder head
Precision 5557 turbocharger
Edelbrock Performer X intake manifold
Ported OEM throttle body
Custom intercooler piping
Custom ram-horn-style turbo manifold
Custom turbo dump pipe
Custom 3-inch V-band downpipe
HKS SSQV blow-off valve
Buddy Club Spec II exhaust
TiAL 38mm wastegate
Walbro 255lph fuel pump
Precision 1,000cc fuel injectors
Earl's fuel lines
Earl's -AN fuel fittings
Earl's fuel filter
AEM fuel pressure regulator
All-in-Fab radiator
Earl's steel braided coolant hoses
Earl's -AN coolant hose fittings
Competition Stage 5 clutch
Fidanza 7.5lb flywheel
Earl's steel-braided clutch line

Power
320whp

SOHC powered builds kevin gonzalez 92 si custom turbo 11 Photo 11/14   |   SOHC Powered Builds Kevin Gonzalez 92 Si Custom Turbo 11


Bisi Ezerioha's '88 Civic wagon

You really can't have a list of favorite SOHC builds without including the uncrowned king of single slammage, Bisi Ezerioha. Having campaigned an all motor single cam build during the golden era of import drag racing, Bisi has established himself as the go-to guy for all things associated with D and F-series engines. His wagon, armed with a Golden Eagle sleeved D16Z6 (are you seeing a trend with the Z6? This thing loves boost!) and a Turbonetics BTX6565 water-cooled snail managed to belt out over 700hp on Torco's 108 octane fuel. The best part of this monster D16 is that it's tucked nicely between the fenders of a'88 Civic wagon!

D16Z6
Hasport engine mounts
Golden Eagle sleeves
Golden Eagle head gasket
Golden Eagle intake manifold
Arias 9:1 pistons
Custom H-beam rods
Bisimoto-spec Turbonetics BTX6565
Turbonetics RG-45 wastegate
Godzilla blow-off valve
Bisimoto 3.6 cam
Bisimoto cam gear
Supertech stainless intake valves
Iconel exhaust valves
3in intercooler piping
Bisimoto twin-scroll manifold
Turbonetics/Spearco intercooler
Skunk2 68mm throttle body
ID1000 injectors
AEM fuel rail
AEM FPR
AEM water-methanol kit
Kinsler monster-mesh fuel filter
Dual 255lph fuel pumps
Griffin radiator

Power
708hp/487lb-ft torque

By Rodrez
656 Articles

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