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After ten years of testing and sorting Comer C50 and C51 engines we have come up with a formula for finding the best motors and preparing them for race day. The methods used are legal for IKF, Stars, WKA and most other groups. It is a combination of several small details and searching for the motors with the best potential. No two motors are the same. Two motors can be only ten serial numbers apart yet .3 horsepower different. Our record is unmatched worldwide with 70% of the US national championship wins in the last two years and 40% of the podium positions.

We offer five levels of motors currently in both C50/C51 and K80. The first level is a standard C50 prepared to run fast. It could be newer or only slightly used. The second is an engine that has shown good signs in testing or at the track and is reformatted to run fast. The last is an engine that either has won regionally or nationally or has the head casting traits that make it a winner. The rest are sorted and ranked by performance into the levels shown below. As you go up in investment it is not a linear power curve, you are simply getting a few more tenths on the track, a few hundred more rpm and a few tenths more horsepower or a better dyno curve for racing.

Our motors are not highly machined motors. They are an investment because they are hard to find and time consuming to test, but because they are gifted and set up correctly you are passing people on the track legally. There is much satisfaction in a win where you pass everyone and get checked thoroughly in tech. When you are declared the winner in tech and everyone walks away scratching their heads that's very satisfying because you and your driver did it within the rules.

Some people have asked for a guarantee that they will pass tech. This is impossible to do for several reasons. First we can't guarantee that someone else doesn't modify the engine after it leaves here. We once had a customer take one of our engines and lap other engines we produced. That same customer was later DQ'd for head work. It is hard to see how one of our engines could lap other engines we produced. The other reason is that parts break and can cause a DQ. Tech directors can also make mistakes. The best thing to do is to ask for your engine or component to be held in tech if you receive a DQ. Ask for it to be sent up the ladder of IKF or WKA. Often local tech directors can read a discoloration in a port as port work when they just haven't seen enough of them to know.  There are very few things as painful as receiving a DQ in a big race. We do everything on our end to make sure it doesn't happen. In the end it will always be your responsibility to assure that your engine passes tech. The best way to do this is to ask a tech director to look at your engine prior to a race - most are willing to do this happily and they are not very busy before racing begins.

Special Notes:

Education Video Segments At The Bottom

Please scroll down to the bottom of the page for tips on how to tune your Comer C50 Engine. We'll post one to three segments a month to help new people figure out how to tune these little engines.

Tornado Kid Kart Engines Lead R7 and R11 of IKF

Kid Kart racing out West is the toughest in the world. Last year we won the regional title with Braden Johnson flying in from Illinois for each race. We put three other drivers on the final podium too. This year with many fewer drivers we are still successful in holding down the Region 11 title with Chloe St. George in a perfect season of all wins. Cruz Fiore hold the coveted Region 7 points lead after winning the opening race and finishing on the podium in all the other races.

 

The Mustang - $1099

These are the brand new Comer C51 cc engines with a standard rebuild. Since these are new engines turnaround time is only a couple weeks and many times we have them in stock and ready to ship. Much improved over the last two years engines, we add to the engine by properly preparing the engine for racing. 

 

 

The Falcon     - $1250  ON SALE THIS WEEK $899                                     

This is our entry level race motor. Great for club racing and even some regional races. It is a used old style C50 motor that has been gone through and set up for high end power. This motor will outperform all legal newer c51 motors and run competitively with the best old motors. If you race under the new C51 only rules please specify you want a C51.

 

The Hornet

If you have been stung too many times by the competition and would like to fly to the front of the pack the Hornet may be your engine. It is an older used motor that has either shown promise at the track or performed well in testing. It has all the hard to find old components that really make this motor perform well at the club and regional level. The motor is taken apart and checked, then rebuilt with the best existing parts and configured to exacting specifications.

 

The Stealth

This engine will sneak up on the competition and drive by before they knew what hit them. These motors are hard to find select head castings that simply perform superior to other motors. Hand selected and carefully reconfigured to perform at the top of the regional races and national events. We have a few motors that have already won a national race or regional title and are proven to produce power in the key rpm bandwidths to allow for passing with equally talented drivers. Stealth engines can take up to 22 weeks or longer to locate and build. It is like finding a needle in a haystack. If you place an order for one you can't change your mind or get your money back. We will deliver the engine when ready. If you race under the new C51 only rules please specify you want a C51.

 

The Super Stealth

Our highest level engine and the most time consuming to produce. The building and dyno process can take several days spread over a few weeks. Often times the process can push a part to it's limits and we have to replace the part and rebuild. This is not for everyone as it is a large investment in materials and time. It is the pinnacle of the C50 engine development business and the amount of R&D that is included in each engine is significant. The engine is broken in on a special purpose $10,000 5" small 2 cycle water brake dyno that is computer controlled and monitored. The air in the dyno room is monitored and horsepower ratings are adjusted by the climate computer. Other dynos may be used to test different components as well as other testing of components. Some people think this level of detail is too much, others want attention to details by a specialist or engineer with knowledge of the engines.

 

The A 10 Warthog Dirt Racing Motor                                                                                                                                                                                                                                                                                         Built to get down in the dirt and shoot up the competition these motors are designed for open competition dirt racing primarily on the East coast. With extensive dyno testing we can give you an unbelievable power plant. $1475.

 

 

The B2    

Related PhotoBuilt to run overseas where they have no rules other than head volume.   This engine is built from parts we receive from all over the US that have been cut or changed and are not legal in the United States but can be used to run the unlimited classes in other countries like Mexico and South America.

 

 

 

 

Stock new C51 Kid Kart engines $744. $35 added for shipping. Stock Comer C51 shipped to your front door. Click the button below to order on line or call us today!

Stock Comer C51

 

Mustang - $1099 + shipping - Click the button below to order online or call us today!

The Mustang Comer C51

 

The Falcon $1295 to $1475  - Click the button below to order online or call us today!

  ON SALE THIS WEEK ONLY $999

 

The Hornet $1690 to $1975 - E-mail us your location and goals, we'll help select the engine   - Click the button below to order online or call us today!

  The  Hornet

 

The Stealth $1975 and up - Give us a call and we'll select the best engine for your goals. These engines usually take about 3 months to find and build. - Click the button below to order online or call us today!

Order a base level Stealth by clicking here. $1975 with shipping

 

 

Order a mid level Stealth by clicking here. $2275 with shipping

 

Super Stealth - $2585 - These are the rare serial numbers that are hard to find but then we focus extra attention on all the details. It takes a while so the sooner you order the better. C51 Super Stealths are usually 1 to 6 months delivery time depending on the order and seasonal backlog. The dyno time is include in the investment total. These engines are built, run in, tested and then rebuilt again until they reach the top level of performance. Heat and cryo treating of these engine components add about three weeks to the process, each process could ruin the part or engine and then we'll have to start over again. When done you'll have a top notch engine.

Super Stealth C50 or C51 Engine $2585 with shipping

 

Dyno Room Engineering - If you want to find the specific best set up for your driver, engine and chassis combination invest in Dyno room time. We charge $175 an hour for engineering time and $125 an hour for break in time. We average that out to a daily rate of $900. We've had many clients find good power by giving us the investment of a second engine to put into dyno testing of new ideas. We are creative thinkers and trained engineers not just machinist or karting enthusiasts.

One day of Dyno Room testing $650 On Sale $Save $250.

One day of dyno room testing specific to your engine or series. We'll find the right combination and power!

Click to enlarge DYNO-MAX 2000 screen.

 

 

 

 

 

 

 

 

On Track Support - I get asked to come help people at the track. I rarely if ever do it except for our factory drivers.  It is $120 an hour for my race weekend time. A minimum eight hours is required plus expenses, flights, meals and hotel. I charge $30/hour for travel time. All has to be paid two weeks in advance to schedule time. I did this for one national champion and it secured his place as national champion. Strategy, set up options, rebuilds, protests and coaching are all included. Hopefully the videos can get you to the front and our track support is the last thing you'll need.

Track Support For Your Team - $860 per day plus expenses.

 

 

The B2 Grey $1775 - Built to basic standards for the international market.

The B2 Grey International C51 Race Engine

 

The B2 Red $2199 and up - Built for top racers facing tough international competition. The price includes scientific treatments of components and dynamometer  testing time to tune for your region and altitude.

The B2 Red International C50 Race Engine

 

 

The B2 Gold -$2675 - This is an engine with every advantage we can give it. From cryo treating certain parts to heat treating others. We build the engine to exact standards and dyno test it. We start with the best head that we can find after viewing many looking for the correct port height, size and shape. After viewing your rules we then make the engine better. Alignment of the crank case halves and the base so the engine can rev freely. Our focus is on creating horsepower at the top end of the RPM range where it counts on a fixed gear class. If you don't run a fixed gear we'll build it for peak horsepower.

The B2 Gold International C50 Race Engine $2675 - click the buy now button to purchase.

 

Engine Rebuilds

Top end rebuilds are $375 and top/bottom end rebuilds are $475. There are many great engine builders that charge half this amount. It isn't that they aren't great builders it's just that they don't do enough of these to know what to do and what not to do. Our record of national and international titles is unsurpassed and if you add most of the top 5 builders together they don't equal half of our regional and national wins. So for an extra $100 or $200 you get the best shot at going fast from the world's expert on these engines. Divide that investment across ten races and you've got the price of a fast food run, so skip the Big Mac and get big power instead.

Replacement Engine Parts

We often rebuild engines and people want to add parts that are more than stock to upgrade an engine. Here are the prices for the parts that you'll need to add horsepower, rpms and torque. The investment in each goes up because of treatments done and because the parts are produced differently and are better than others. Why are they better: the casting is better, measured surfaces are more advantageous, drillings or machining are straighter.

Heads

Replacement Head $225

Hornet Head $385

Stealth Head $650

SuperStealth Head $875

Crankshafts/Rod

Replacement Crankshaft $290

Hornet Crankshaft $435

Stealth Crankshaft $590

SuperStealth Crankshaft $750

Piston

Stealth $220

SuperStealth $285

Carburetors

Torque Carb $195

RPM Carb $295

Stealth Carb $540

 

 

Paypal.com has a limit on new accounts of $2000. If you don't have an account and would like to wire money to us just e-mail tornadodriver@ gmail.com and we'll get you the wiring information for our bank account.

We accept credit cards through our paypal.com account. Just log into www.paypal.com and select tornadodriver@gmail.com as the person to pay and we'll get started. Call us at (916)390-6474 with any questions. We have a few motors ready in advance some times but many times you'll need to order and give us a few weeks to get everything ready, tested and shipped. Shipping and handling are $19 plus $8 for insurance. Overnight shipping is usually $98 for UPS and $65 for US Mail (not guaranteed).

Race engines do not have warranties. Once you place the order and pay for the engine it is your engine and can't be canceled or returned for a refund. Well meaning people can and do forget to put oil in gas, drop engines or run them with the wrong plugs. Even if the engine has a problem after the first day it can't be returned because there is no guarantee or warranty on race engines. No engine can be guaranteed to pass tech, because they can break, be modified once they leave our shop or be read incorrectly by a tech director - we build them to technical standards. This is standard policy in the motorsports industry. We know the race engines are in good shape when they leave here. The old style C50 engines can take a while to find and build. We ship when they are done - once ordered you can't get a refund. If you refuse shipment we'll hold the engine or chassis 3 weeks, if you don't take shipment it will be donated to a charitable organization that helps young racers get a start. Please make sure you are prepared to accept these conditions before you purchase. For many individuals this is their first motor sports performance purchase.

 

Educational Video Segments

We enjoy helping people at the track get up to speed. The reality is that there are more than 40 areas to focus on when racing these little Comer C50 engines. That's why people have so much trouble catching those of us that have been building these for so many years. Some of the tips get out an some are given for free like we do here. If you want to get all the tips the go to our video section and purchase the entire three hours of video tips on DVD and save yourself a ton of testing and experimenting. That way you can get right to dialing in the track and put your doubts to the side that you have the engine tuned.

Click on the title to see the video:

How To Tell The Difference Between Comer C50 Old Style and Comer C51 New Style Engines

Advanced Tips - Head Differences Video Sampler

Flywheels for the Comer C50

 

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