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

[Superhawk996]

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Like rgolia, I’ve leaned toward DubShop . Mario has a dyno. He seems to provide a reasonable base tune to start from, etc. Sells as a nice complete kit.

I’d really like to know about low speed, off idle drive ability using Alpha-N or hybrid tuning if you know which is being used. Even if you don’t know or haven’t played yet with tuning, what are your impressions of driveability at low throttle?

Regarding cold start circuit, if you mean a Weber type choke circuit, I’m confused. With EFI you should be able to tune injector pulse with by temperature. So if ambient temp (or head temp) is cold, cold, like 20F, you should be able to modify the fuel map and just dump in some extra fuel