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Honda Integra GS-R - The High Carb Diet

A carbon fiber-clad DC2 13 years in the making

Rodrez
Jan 20, 2017
Photographer: Chad Burdette

It was like the scene out of a movie, or more accurately, an over-dramatic love story. Searching high and low through Thailand's pouring rain, Lertsiri Boonmee came across what could only be described as love at first sight. "A Championship White JDM front end was peeking out at me. Everything went blurry except for those '98 spec headlights. I knew immediately that it was fate."

Cheesy scripts aside, in actuality, Boonmee's girlfriend had given him just a short 10-minute window to keep looking for a used car in the torrential downpour that day and, as luck would have it, this DC2 and its future caretaker happened to lock eyes.

Honda integra gs r mugen mf10 Photo 2/16   |   Honda Integra Gs R Mugen Mf10

For the next 12 months, Boonmee had his way with the B18C and '98-spec transmission combo that regularly plastered a smile across his face, but admittedly he didn't really know where to start with any future upgrades. That would all change after a chance meeting.

"I met a friend who was crazy about the DC2 and he recommended I go to this engine builder/body shop garage for a makeover." As fate would have it, the shop owner was already very well acquainted with the car, as he was responsible for all of its modifications up to that point via the previous owner.

Honda integra gs r mugen wing Photo 3/16   |   Honda Integra Gs R Mugen Wing

The first stage of Boonmee's build was initiated when he stripped the car down to its bare bones in order to have a complete Imola Orange color change applied. With the engine out of the car, a set of Spoon pistons made their way into the 1.8-liter block while the cars windows, also out during the bodywork process, were replaced with Lexan versions. With everything reinstalled, a custom, uninterrupted 2.5-inch titanium exhaust system was fabricated and connected to a Spoon N1 muffler and it was off to the dyno.

Honda integra gs r jdm front end Photo 4/16   |   Honda Integra Gs R Jdm Front End

Not exactly thrilled with the power numbers, Boonmee decided it was time to get a little more serious. The head was ported and polished, the valvetrain upgraded and a number of different cams experimented with until a set of Toda C2s were decided upon. And just like you, me, and any other avid enthusiast in any part of the world, he wanted more. He adds, "We modded the engine and had better power on the dyno - but it still wasn't enough."

Honda integra gs r b20 vtec engine Photo 5/16   |   Honda Integra Gs R B20 Vtec Engine

As good as the B18C engine is, Boonmee wanted more torque via increased displacement and figured the easiest way to do that was a B20/VTEC set up. The original low-compression pistons were swapped out for 85mm CP slugs joined to Manley rods with ARP hardware. Up top, the VTEC head was fitted with Ferrera valve guides and Buddy Club P1 valves, while a custom billet 68mm throttle body was bolted in place. On the hot side, a custom-built titanium header was constructed to direct spent gasses to the previously mentioned titanium exhaust. Attacking the gearing, a one-off straight cut gear setup combined with a 4.929 final drive help take full advantage of the now 252hp output.

Honda integra gs r custom roll cage Photo 6/16   |   Honda Integra Gs R Custom Roll Cage

While all of the power upgrades were underway, that bright orange body that would draw eyes at every turn was taken in a completely different direction, refinished in satin black, but not before the entire chassis was stitch welded. In addition, gone was the rather frail Cusco bolt-in cage, replaced by a custom cage that includes X-bars at each door that anchor behind fiberglass modified door panels. In an effort to shed as much weight as possible, a carbon fiber hood, bumpers, sideskirts, fenders, and doors were brought in to replace their metal counterparts.

Honda integra gs r custom carbon fiber bucket seats Photo 7/16   |   Honda Integra Gs R Custom Carbon Fiber Bucket Seats

The high-carb diet didn't stop with the exterior, as a set of custom carbon fiber seats that were actually molded to Boonmee's body during their design are bolted to the chassis via Bride super-low rails. Even the steering wheel was replaced by a one-off carbon version, cinched with titanium hardware and, of course, highlighted by an NSX-R horn button. On the passenger side of the dash, you'll notice two holes just above the glove box, and that's under advisement from Boonmee's better half. He states, "Well, my wife wanted cup holders, so we used two soda cans and some fiberglass to create a set of cup holder holes on top of the dash, just above the glovebox!"

Honda integra gs r interior Photo 8/16   |   Honda Integra Gs R Interior

Having added so many custom bits and pieces to his project, Boonmee's favorite addition isn't something you can see from the outside. Last year he got his hands on his most prized possession; a set of Mugen billet front lower control arms. Intended for use in a JTCC racecar, these never installed pieces weigh just a fraction of the OEM version and are most likely the only ones to ever make their way to a street car.

Honda integra gs r carbon dogfight pro lip Photo 9/16   |   Honda Integra Gs R Carbon Dogfight Pro Lip

After 13 years and multiple extensive changes, Boonmee is content with his creation. The car is a daily driver on the streets of Thailand and is even used to transport his offspring on occasion. He adds, "When I drive my son to school, he points at the rev meter and says 'VTEC, dad!' Over the years my original dream to exceed the Type R-spec Integra took shape. I gave my car a nickname, 'Type R-Core', because to me it represents the hardcore feeling that the DC2 R embodies, but is more focused on the actual core of the Type R - spartan and usable."

Honda integra gs r mugen gen 2 rear wing Photo 13/16   |   Honda Integra Gs R Mugen Gen 2 Rear Wing
By Rodrez
470 Articles
Honda Integra GS-R - The High Carb Diet
Tuning Menu
Owner: Lertsiri Boonmee
Hometown: Thailand
Engine: B20/VTEC swap, 85mm CP Pistons, Manley rods, Toda C2 cams and valve springs, Toda oil pump gear, Ferrera valve guides, Crower gen 2 titanium retainers, Buddy Club P1 valves, port/polished B16 head, Mugen water temp sensor and water valve, Sard fuel rail and regulator, custom aluminum 68mm throttle body, 2J VVTI injectors, Power FC with Commander, J's Racing intake chamber and filter, lightweight crank pulley, B16B starter, custom 4-1 titanium header and straight pipe, Spoon N1 muffler
Drivetrain: 1998 ITR-spec gearing with custom 4.929:1 final drive, custom straight-cut gears
Power: 252hp, 170 lb.-ft. of torque
Suspension: Mugen Showa 5-way adjustable Low Down suspension, Function 7 billet rear control arms and bracing, Mugen billet Group A Racing spec front extended control arms, Mugen anti-sway bar relocation adapter, Cusco Master Cylinder Brace, J-Sport inner fender bracing, front traction control bars, front Spoon Sports front and rear lower tie bar, Ultra Racing under carriage 3-pt triangulation bar, ITR rear lower bar, EM Racing trunk floor bar, C-pillar bar, Carbing rear shock tower bar and front 3-pt bar, CTR front shock tower bar, solid ball joint transmission mount, J's Racing engine stabilizer, polyurethane rear engine mount, front passenger floor bar
Wheels & Tires: Mugen MF10 16x7 +43, Yokohama Advan Neova AD08R 225/45-16
Braking: Spoon Sports Monoblock front calipers, Mugen slotted dics, Mugen front brake pads, Endless rear brake pads, APP stainless steel brake lines, ABS delete
Exterior: Carbon fiber JDM front/rear bumpers and front fenders, Carbon Dogfight Pro lip, carbon canards, Nismo N1 R32 bumper intake ducts, Azect carbon grill/headlight cover, J's Racing vented carbon hood and driver's side air duct, custom carbon passenger side air duct, custom carbon Honda Access sideskirts/rear spats, custom carbon doors and roof, lexan side and rear windows with NACA ducting, Mugen Gen 2 wing with custom carbon fiber adjustable fin and duck tail extension, custom carbon rear diffuser, Stanley side markers, Mugen tow hook
Interior: Custom carbon seats, steering wheel w/NSX horn button, gauge bezel, door/window switches and radio block off plates, custom super low seat rails, S2000 start button, aluminum foot rests and floor board, custom carbon gauge bezel, custom cup holders in console
Thank You: Friends From ChapterOne, Integra Inc. of Thailand; the Integra owners around the world who have given me information and shared their enthusiasm with me; my builder and body shop Mr. Mard Body and mechanic Mr. Samai; Chad Burdette who did an incredible job doing my car justice with his photography skills; HT Digital for being the inspiration of the dream to continue In what I love; last but not least I would love to thank my wife for letting me continue my dream from the very beginning on that fateful rainy day and to someday hand over the keys to my son

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