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KitCarlson EMS
What an amazing system! For years we never really offered Fuel Injection systems for our engines because they added so much extra clutter on the engine, and took the simplicity the Dr. Porsche designed away from them. This system is different! The main benefit of this system is that it is SIMPLE!!!!! It has very little added things that it doesn't need to operate effectively, thats a huge plus in my book as I consider every part of any system a possible failure point. UPDATE: DEVELOPMENT OF THE KIT CARLSON EMS HAS BEEN SUSPENDED. IN TURN, RABY'S AIRCOOLED TECHNOLOGY HAS PAIRED WITH SDS (SIMPLE DIGITAL SYSTEMS) FOR THEIR EASY TO USE PROGRAMMABLE EFI FOR ALL RAT FUEL INJECTION SYSTEMS. The designer, inventor of the system is Dave Carlson. Dave is an awesome Electronics Engineer and he has built everything in this system from 100% scratch! He started in 1996 with his plans for a complete engine management system and has been finished and in testing now for about 6 months. I found Dave in an online forum and contacted him about the benefits of his system over the stock D jet and L jet systems used in VW and Porsches with Type IV engines. I soon found out that he was just a couple hours from us in Tennessee and that he needed some real time Dyno data from his system. I was super interested in going to this next step with our engines due to the quality control issues with new carburetors and the rapid price changes of them. I had a customer who had already expressed a great interest in an EFI system and he was willing to be a guinea pig for Dave on the Dyno and in his project car. The test engine was a custom configured "2563 Extender" A member of our "Superhero" family of engines. Keep in mind when you look at these plots below that this engine was designed solely for long life and torque filled engine for a 1964 VW BUS! Just imagine all this power in a vehicle that originally produced around 40BHP. Also pay particular attention to the Rev range, and that the engine does not need to rev high to produce bone breaking torque and a nice HP curve. This is exactly what the Bus needs to be a great daily driver, and street terror when you want it. In anticipation of the EMS testing I wanted to ensure that we would have a fully mechanical stable engine, so I added my dyno test set of Weber 44 IDF carburetors to it for initial test runs. I did this to make sure that and problems would not be blamed on Dave's system and also to get 100% accurate dyno data from the engine fully optimized with carburetors, then compare that to a fully optimized set of plots from the same engine Carbs Vs. EFI.... Something that creates a lot of fuss in discussions, but something that has very little if any back to back data on the same engine for comparison. I did it, and with 5 onlookers all I can say is that I'm hooked and this system will be offered on our engines at the earliest possible time!
In the first round of testing Dave's EMS had some RPM related issues above 5,000 RPM and after a week of testing we had seen the potential of the system and wanted MORE!!! Dave went back to his lab, figured out the gripe and we threw the engine back on the dyno... In round two the engine made better torque, better HP and overall ran smoother. We had some fuel system quirks worked out on the dyno and the only issue was that our weather was hot and super humid- not good for making comparative data, especially when the carbureted plots were taken on a day that had pretty much optimum weather for dyno testing. Just wait till you scroll down to see these unbelievable plots from the comparative testing!
To make a long story short, we dialed in Dave's system in just 5 dyno runs!!! The engine produced a whopping 33% more Torque, and made power all the way down to 1,000 RPM, when the carbureted engine would simply die at 2,000 RPM or less. Look at the captions below for some more details... Look for this system to be available in full kit form, or available as an addition to any of our engines in the near future (as soon as possible) Here is the Kit Carlson EMS installed on the 2563cc Super Hero, this system is set up with individual runners to work with my cooling system. Dave has designed his system to work with IR runners, or with a stock Plenum for 914 Performance applications with stock cooling. As we write this we are designing a plenum based singe throttle body system to work with our DTM!!! That's simpler and cheaper than the individual runner arrangement! (excuse the clutter of the engine in these pics, all we wanted was data, we'll dress it up later)
A couple of sensors to monitor inlet temps for initial calibration. Not the best way to do it, but it works for initial runs.
The MassIVe Dyno cell filled with HP, and a control room filled with computers to monitor it all.
Another view, of the goodies. The computer on the right records air/fuel ratios, and the computer on the far left is used to set up the fuel maps and monitor the engine during set up....The instruments in between are just my toys.
This is about the coolest temps we saw all day, this was about 9 Am, it got way worse as time went on. This data comes from my weather station set up on premises that downloads into the dyno computer.
Dave's system is laptop/PC/palm pilot programmable. here is a shot of one of his maps. Its so simple!
Dave on the left adjusting a MAP and me on the right dropping the hammer on the 2563! (Damn, I need a haircut!)
Fuel map for our 2563 EMS after being adjusted for driveability and fuel economy.
Makin power! Look how cool the temps were, this is typical of a Nickies equipped engine! Not only do head temps under load not exceed 300F, but at idle the heads run at 175-190F, and that's even with the dyno cell at 120F!
To view more pictures from our EMS install, visit this page: To read more about our other EMS installs, visit these pages:
2332 Squishes Type 1 Jake Raby Copyright 1997-2008 Raby’s Aircooled Technology. |
