1990 Suzuki Swift Honda K20 Powered


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Motortrend has had this article on Kevin Stittle's Swift for a while and updates from before to after being switched to a K20 Honda engine and then after being supercharged and I just want to post the link here for those have never read it. There is some good naming of parts used especially what is used for the axles/ wheel bearing and hubs. The link is directly below, and I cut and pasted the main parts of the article just in case the Motortrend article disappears.

1990 Suzuki Swift - Fast Times DownTime

Turning his beloved Suzuki Swift GT into a race car—one that now sports Honda K20 power—has been the perfect stress reliever for Olympian Kevin Stittle.

Updated July 2020: Even before the current incarnation of Kevin Stittle's 1990 Suzuki Swift GT we knew the subcompact was a little badass, which is why it was first featured in Modified mag in 2013. That early version may have been just a leaping point, though, as the car today—still owned by Stittle—is a much more capable track assassin.

For one, the
Suzuki now features a supercharged Honda K20 engine built by Lavigne Motorsports, kicking to the curb the hatchback's native G13B 1.3L mill. Kevin's mighty mite also has added supplemental aero bits that include an APR rear wing and Custom Carbon Composites front splitter. We caught up with Stittle and got an update, plus more recent photos from @pitlane.media.

SS: When did you decide to go K20? How difficult was the swap? Is the K20 still supercharged?

KS: I decided to do the swap back in 2015. I just felt the car had reached its potential with the Suzuki motor. I had spent a lot of time trying to make power with it and I was sinking a lot of money into developing it with minimal returns and limited potential. A quick measurement of a K Series motor and my mind was made up; it would fit between the frame rails and I decided it was the next step for the car. When I did the swap it was the first one in the world in that model Swift, but with a race car it's a lot easier to do a swap than if you are keeping it a street car. The car was stripped, and it all started with a long block, gearbox and a set of K Tuned headers. The engine mounts were fabricated around the headers fitting; we wanted to be able to use as many off-the-shelf parts to make life easier. K Tuned was a huge help and the car has a ton of K Tuned parts on it that look and work fantastic. From there it was pretty straightforward - plumb in the fuel, wire up the motor and add a pedal box for the hydraulic clutch pedal needed. The most difficult thing to work out was axles; I started with a custom set of shafts with the Honda spline on the inner and Swift spline on the outer. It worked and might have been ok for a street car but we kept sheering them in half on the track. In the end I adapted a larger Suzuki SX4 upright to fit a Honda wheel bearing and pressed in a Honda hub, that way the whole driveline was Honda and I simply ordered a custom length set of Honda axles from Drive Shaft Shop. I have not had an issue since. With the swap on a stock motor we had gained about a 100whp over the Swift motor. We worked out all the bugs with that setup, then went to the Rotrex Supercharger. The car now make 455whp on a Mustang dyno tuned by Lavigne Motorsports on VP100 fuel. It's an absolute rocket.

SS: Generally, what else has changed about the car since it was featured in Modified in 2013? We noticed the aero

KS: There is a lot that has changed - probably not much that's the same actually! Shortly after the Modified magazine article we went wider with custom control arms and some 3-inch flares. We added a full cage and carbon roof skin, carbon doors, carbon hatch, carbon skirts, carbon splitter, carbon diffuser and an APR GT250 wing. All of the brakes were upgraded to a custom NEO Motorsports big brake kit with Hawk pads which is now available to the public. All new, all aluminum prototype NEO Motorsports coilovers front and rear with Eibach springs are on it now and a fun new addition, NEO Motorsports air jack system. The air jack system seems a bit odd to put on a time attack car but it is so nice to have and makes changes and service at the track so much easier It's probably one of my favorite mods right now. We are running a much bigger wheel, Konig Dial In's in a 15 x 9 with Nankang AR1 245's on the front and 225's rear. The car is hooked up on this setup and the tire and wheel combo are killer. An AEM CDL7 dash is used for all of our driver information and data logging, then there are some race car stuff like a fuel cell, Accusump and on board fire suppression system that have all found their way into the car.