Aftermarket FI options for Type 4 motors 2056 or larger, Who here has gone this route and is it worth it? What options do we have? Options

[DRPHIL914]

i started looking into this 2 years ago when i was planning my rebuild motor after the drpped valve seat on the OEM motor.
I ended up building a nice 2056 with increased compression, brand new heads, counter balanced crank and of course the cam is performance minded as well.
to start i installed the d-jet and later last year i added a 50mm bored out stock throttle body from Tangerine/Chris Foley. Yes this helped a great deal, but we are still limited due to the d-jet and the MPS. So there are a few people out there that make ITB( independant throttle body) that could be used.
One is Jenvey, and i see that PMB is carrying those. It looks ike they are mated to what ever IDF intake manifold you choose. there are 40, 45, 48 options. mated with 350cc injectors.
I am wondering other than the CB performance stuff that has been available for a while, others have come to the table, who here has played around with this ? over the years ive read a lot on others using the megasquirt and micro etc and it seemd they were very difficult to tune and set up with lots of problems, trial and error.

I am looking for advice on what to stay away from and what are the pitfalls and mistakes we can avoid before jumping into this.

Look forward to some input, thanks!!

Phil

[MSGGrunt]

I have converted my 1969 TR6 with twin SU side draft carbs to FI using a kit made by Patton Machine in Maine and also converted a 1973 Mercedes 2.8 I6 using a 2-barrell EFI system by FI Tech, similar to the Holley sniper system and I have a few questions.

With the Jenvey system is there any risk of the fuel falling out of atomization before it reaches the intake at the head? Does it get input from the stock Porsche sensors? My car is a 1975 CA car, so it originally had an O2 sensor.


With the FI Tech system the 2-barrel is bolted on in place of the OEM Mercedes Solex 4A1 4-barrel. All the "brains" of the system are internal to the unit except for an O2 sensor that had to be installed.

https://fitechefi.com/product/39001-go-efi-...l-400hp-system/


On the Patton Machine system, he uses a GM computer with GM injectors and the SU carbs as just a means to flow air. It comes with a separate O2 sensor, TPS, IAC, MAP, and coolant temp sensors, so not a single unit like the FI Tech or Holley Sniper.

https://www.pattonmachine.com/shop/https-ww...m-bodied-carbs/


Like others, I like my fuel injection even if L-jetronic isn't state of the art by today's standards, but what are we to do if we want to take our 1.8 motors out to 2.0? I assume it would be more than just swapping in bigger injectors and installing a larger or bored our throttle body?