What modern EFI is everybody using, Modern EFI applications on Type-IV engine Options

[TheWeatherMan]

What modern EFI systems is everyone installing on their Type-IV engine?

[Mark Henry]

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I sold Dave his SDS system.


SDS is hands down the simplest system to get up and running, often the factory program will run straight out of the box good enough to get you going. I've locked in the rough fuel maps in as little as 30 minutes of driving time, no dyno.

But there's many computer guys who don't like the thought of a pendant programmed system. The pendant is definitely different, but once you know how the scroll function works with the rich/lean knob, changing values is very fast.
V5 now addresses most of that with the 8 channel data logging, I believe with this you can now program with both the pendant and the laptop.

Many also believe you have to have sequential, in aircooleds running 3000rpm, the speed for proper cooling, the fuel economy of sequential goes out the window.

SDS is not for everyone, but it is a pro built, proven (23 years), good bang for the buck.

SDS has three versions
EM5 (EM 3-and 4) Fuel only
EM5-MSD (EM 3-and 4-MSD) Fuel with crankfire for MSD dizzy based systems
EM5-F (EM 3-and 4-F) Fuel and crankfire. GM based coils, one for 2 cylinders

BTW owners of older V3 and V4 SDS systems can upgrade to V5 for $580. SDS takes your old system ECU, gut it and install a V5 board and drill the case to install the laptop connector.

I have several running systems that I sold and/or installed
A 930 600hp monster EM4-F twin plug
A 930 hot street (guessing 350-400hp) EM5-F twin plug (now MS see note below)
A few vw vans EM4 mostly fuel only, stock dizzy
2 914 EM4 one fuel only one -F crankfire.
my SDS EM4-F system, in my 2.6L type 4 powered bug
and several systems sold, owner installed.

I have one customer who went from a SDS to a MS just this year, in hindsight he said he should have just stuck with the SDS as he's seen no performance improvement. But he does say the MS has more bells and whistles and he wanted to run COP, play with his computer, etc..
If anyone wants a lightly used SDS EM5-F /6 twin plug system PM me and I'll see if it's still for sale. It has the latest V4 chip.