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Modified By KC built this.


1994 Toyota Supra gets a new Precision Turbo upgrade to a GEN2 PTE6870

Toyota Supra PTE6870 boost only

Andy contacted us prior to even taking ownership, or even seeing the car in person to make more power before it made it to him in the Virgin Islands. We swapped out the Precision 6765 for a Gen2 6870 unit. It was indicated that it made 877rwhp on boost only, & he wanted over 1000whp on boost only...then spray the Nitrous. We obliged with upgraded 450lph E85 Walbro fuel pumps, & a new set of ID2000's to fuel this new turbo with the extra boost. Also installed a Strange drag race rear brake kit, along with a new RPS triple disc strapless clutch kit.MKC SFWD Civic shirt 126

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Breaking the World Record for a stock BMW N54 motor

2007 BMW 335i

This 2007 BMW 335i project has been one insane project to get our hands dirty with. Josh came to us with the idea of installing a top mount FFTEC turbo kit, along with the Motiv Motorsports top fuel injection system. The tricky part about this project is the fact that from BMW, the engine is a direct injection motor. We control the OEM DME through the Cobb AccessPORT, & control the Motiv Motorsports injection rail with a Haltech Platinum Sport 1000. Modified by KC also built a custom 4" midsection to dual 3" straight pipes out the rear of this monster.

Motiv Motorsports broke the world record on a stock N54 motor with 829whp. We backed it up with their product with an 861whp on this project here.MKC SFWD Civic shirt 032 MKC SFWD Civic shirt 033 MKC SFWD Civic shirt 034 MKC SFWD Civic shirt 035 MKC SFWD Civic shirt 036MKC SFWD Civic shirt 039 MKC SFWD Civic shirt 040MKC SFWD Civic shirt 043 MKC SFWD Civic shirt 045 MKC SFWD Civic shirt 046MKC SFWD Civic shirt 049 MKC SFWD Civic shirt 050 MKC SFWD Civic shirt 051MKC SFWD Civic shirt 219MKC SFWD Civic shirt 256 MKC SFWD Civic shirt 257 MKC SFWD Civic shirt 259MKC SFWD Civic shirt 314 MKC SFWD Civic shirt 315 MKC SFWD Civic shirt 316 MKC SFWD Civic shirt 317 MKC SFWD Civic shirt 318 MKC SFWD Civic shirt 319 MKC SFWD Civic shirt 320 MKC SFWD Civic shirt 321 MKC SFWD Civic shirt 322 MKC SFWD Civic shirt 323 MKC SFWD Civic shirt 324 MKC SFWD Civic shirt 325


Justin S.’s 2011 STi build

This 2011 Sti came to us on it's 2nd warranty motor, that had an issue. They decided they didn't want to go through the pitfall's of an OEM piston failure again, & decided on the Rallispec standard street short block. Modified by KC performed the cylinder head service work, & assembled the long block assembly, ridding itself of all emissions items, as well TGV deletes from IAG Performance, & fuel rails to match for the ID1000 upgrade, & a DeatschWerks 65c pump feeding them. Along with the motor & fuel upgrades came the Blouch 1.5XT-R, GrimmSpeed EWG up-pipe with TurboSmart 45mm. Produced 375awhp & 375awtq on 91 octane pump gas. It will return this spring to get it's corn tune.


Poncho Racing & Team Rotary de Kansas City in action at World Cup Finals Imports vs. Domestics 2014

Team Rotary de Kansas City was represented well in Maryland for the World Cup Finals Imports vs. Domestics 2014 by Poncho Racing. We changed quite a bit just before leaving for the event. Went to the Borg Warner 91mm turbo, & new AMS2000 boost controller. Got some great data for the new setup, but in the end had some issues with an older motor. We'll be back for the 2015 season with a fresh motor build for this little RX2 monster. Stay tuned.

WCF 2014 Round 1 qualifying Super Street FWD Modified by KC Civic goes 9.02 @ 173mph

Modified by KC made it to World Cup Finals Imports vs. Domestics 2014 in November for it's first time. We made it out there without having the proof that we were even strong enough to get to the game. We knew that the car was ready. Off the trailer for Test 'N Tune, the MKC Super Street FWD Civic went 9.37 @ 170mph. Eyebrow's rose, heads started to turn in our direction, as the competition knew that these boys from Kansas brought their "A" game.

Forced Performance Super94 on a 2.3L Evo at Modified by KC

Jason Crooks did a magnificent build on this Evo. His attention to detail is of the utmost quality.

This has been one fun project. This car came back from the DSM/Evo Shootout 2014 in August with a head gasket blown in Ohio. Didn't bother with it there, and just waited to deal with it when it got home. Needless to say, it ended up getting an MKC CNC ported head, balance & blueprinted the short block assembly with Manley Turbo-Tuff I-beams, and Wiseco 9.5:1 E85 pistons. Forced Performance Super94 mated to the long block via JMF manifold.

This 2.3L is cranking out nearly 740 all-wheel torque!!! Watch for this street monster.


MKC Evo VIII with NEW FWD Facing Manifold & PTE6765

The MKC Evo is back!!!!

Watch for this little street machine around town. It may break some hearts.

It has an MKC FWD facing manifold fitted with a Precision Turbo 6765. An ETS 4.5" FMIC with MKC aluminum piping feeding a GM LS3 DBW throttle body. Magnus Motorsports intake manifold with Injector Dynamics 2000cc injectors fed by a Radium Engineering triple pump Fuel Surge Tank. The exhaust gases exit via the MKC 3" SS downpipe to the V&P Racing 4" SS exhaust system. Runs on Link G4 Xtreme for the DBW capabilities.

MKC SFWD Civic Goes 8’s @ World Cup Finals Imports vs. Domestics 2014

It was a long road for Modified by KC this year on the drag racing circuit. Started out the year with some new goals, & new idea's for the car. Set those idea's on paper, & soon to the fabrication table. Thanks to Sheepey Built, we were able to get the manifold & intercooler setup to set the foundation for the rest of the build process. Once the BorgWarner 72mm turbo from Full-Race was set in place via the Sheepey Built manifold, we were able to fabricate the 4" exhaust & dump tube to exit the hood for more downforce on the front end going down the track.

Got the intercooler setup on the weight bars, which almost seemed to be built for the car. Fabricated the intercooler piping with Vibrant's Vanjen clamp assemblies. Started the project with a GM LS3 DBW throttle body, being controlled via ProEFI. Quickly realized that the DBW throttle body did NOT like anything over 40psi of boost pressure. Went back to the MoTec M800 (the only way to go), along with the cable throttle body, & new motor. Found we were in real business with this setup!

Modified by KC was able to make it to some "Test 'N Tune" events at Heartland Park Topeka, & was able to get some great data out of the car. Ran a 9.37 @ 165mph, & backed it up with a 9.66 @ 165mph. This gave us the confidence and passes that we needed to know that we had what it takes to run with the "big dogs".

Modified by KC made their debut appearance at World Cup Finals Imports vs. Domestics 2014 and represented Kansas City well. Right off the trailer at "Test 'N Tune" the Super-Street FWD Civic ran a 9.37 @ 167mph. First Round Qualifying ran 9.02 @ 170mph, sat in 17th place. 2nd Round Qualifying tripped lights when popped out of gear, fell to 19th place. 3rd Round Qualifying ran 8.84 @ 175mph! We got our first 8 second pass!

Follow Modified by KC in 2015!!!

MKC SFWD Civic getting some new pipes

MKC SFWD Civic gets tipsy

MKC SFWD Civic gets tipsy

WRX Drive-Train Swap; STi in a Box

Who would have thought, an STi drive-train in a box, LOL. Well that's what we received for Andrews' 2003 WRX when he decided it was time to get rid of the inferior WRX transmission and remaining drive-train in favor of the much beefier STi 6 speed transmission and drive-train. Along with installing the STi Transmission we also installed a brand new ACT HD 6 puck clutch kit.

Also some new Power Slot slotted brake rotors were installed in the rear along with Hawk pads to match the front brake setup on the car. Another upgrade we are doing for Andrew along with the STi drive-train swap. This is a brand new Grimspeed Intake Manifold with a beautiful black powder coated finish. This piece is truly a work of art and a very nice addition to this build.

Along with the intake manifold upgrade, Andrew was looking to switch over to E85, as we have been putting the bug in his ear for the past year or so with so many E85 tuned cars in and out of the shop. The plan was always to switch out the RC 750cc Injectors in favor of the Injector Dynamics 1000cc High Impedance injectors, as they will allow much more room as the modifications progress.

These injectors are a direct fit with a top feed fuel system and they do not require the need for a bulky and cumbersome injector driver box to be wired into the car. For fuel rails we chose the brand new just released T1 Side Feed fuel rails over others on the market as we were able to keep more dollars in the customers pocket and still get as good of quality or better than the competition. The reason for the fuel rail swap was that Andrew was already complaining of the dreaded early model WRX fuel smell from the engine compartment while driving, and the fact future modifications are planned.

We ran into a bit of a hang up when we went to install the T1 fuel rails on the TGV deletes that Andrew already had from Grimspeed, but they were from a top-feed WRX setup. Because of this the T1 fuel rails did not line up ever so slightly plus the pitch angle of the injectors along with the height would have been way off. So we called around first to Grimspeed to find out how far out they were on another set of side-feed ported TGV deletes; more bad news as they are out over 2 weeks. A Quick Phone call to Tony at T1 Race Development and we found out at this time they don't have anything for top-feed TGV's. So we were on the look out for some side-feed TGV's as Andrew used his original units as the core exchange with Grimspeed. Luckily we had an extra set in the shop and Scott went to removing the TGV butterflies along with welding up the holes the shafts leave. After this he went to porting and honing them for a very nice consistent and transient flow into the cylinder head.

One last item that was installed before tuning was a Vibrant Performance Vaccum block as before there were quite a few "T" connections for all the various vaccum/boost sources like boost gauge, blow off valve, fuel pressure regulator, etc.  One thing that was sharing a vaccum/boost source was the fuel pressure regulator, and that is something of a tuning concern for me.  The FPR should have a stand-a-lone vaccum/boost source and if it were a speed density car running a map sensor instead of the MAF meter; that as well should have it's own vaccum/boost source.

After some initial setup of the injector scaling and latencies in ECUFlash, along with re-scaling the MAF meter we started doing base dyno pulls with moderate boost before going WOT.  When everything was finally dialed in we were able to extract 286whp and 249wtq on 91 octane pumpgas with a toal boost pressure of 18psi.  Next we drained the tank of the 91 octane pumpgas in favor of E85.  The first initial pulls on E85 was to make sure the re-scaling of the injectors netted us safe AFR's during spool up of the turbo.  After some full WOT pulls at 18psi to get the MAF scaled right for E85 we upped the boost to a max of 23psi and were able to make 336whp and 307wtq, and increase of 50whp and 58wtq over the 91 octane tune.

If you would like to look at all the pictures we have of this car and of this build, please click here.