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

[Gatornapper]

Impecable timing as to this thread - almost as if Phil was reading my mind.

In discussions with DrPhil this year he had told me about his 50nn throttle body for his D-Jet that he had gotten from Chris Foley when I expressed an interest in finding one for my D-Jet that I hope to install this summer on my 2056 rebuild.

I contacted Chris and he told me he got the 50mm TB here:

http://www.highperformancehouse.com/

from Rich and that it had been custom made with the throttle plate actually hammered out to increase its size.

I checked Rich's website and found this under Porsche:

(IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1712624115.1.png)

I never could get an answer at the number but left a message. Over a month later Rich called me.

He explained that the guy who bored out the original TB was no longer around but he did have one 48mm one left that he would let go for no less than $500.00. He also explained how the throttle plate was painstakingly hammered to proper size as Chris had.

$500 for 3mm increase in diameter - no thank you. Made me wonder if a machinist friend could not make one from scratch for that amount from my original 45mm one.

Friends are telling me that my present engine performance with dual IDF-40 EMPI clones is so good that I'd be a fool to go to D-Jet as there is no way it could perform as well. Even cold starts are no problem with 20 seconds of throttle-pumping all that is needed on the coldest days.

I'm going to follow DrPhil's lead on this most likely - depending on his budget. I think his budget flexibility is larger than mine.

I like the idea of using my original D-Jet with a 50mm TB & an AFR gauge which I already have. But if there is a way to get even more power with D-Jet and modern EFI benefits, I'd love to have that - if available at a reasonable cost.

GN

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

[DRPHIL914]

Impecable timing as to this thread - almost as if Phil was reading my mind.

In discussions with DrPhil this year he had told me about his 50nn throttle body for his D-Jet that he had gotten from Chris Foley when I expressed an interest in finding one for my D-Jet that I hope to install this summer on my 2056 rebuild.

I contacted Chris and he told me he got the 50mm TB here:

http://www.highperformancehouse.com/

from Rich and that it had been custom made with the throttle plate actually hammered out to increase its size.

I checked Rich's website and found this under Porsche:

(IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1712624115.1.png)

I never could get an answer at the number but left a message. Over a month later Rich called me.

He explained that the guy who bored out the original TB was no longer around but he did have one 48mm one left that he would let go for no less than $500.00. He also explained how the throttle plate was painstakingly hammered to proper size as Chris had.

$500 for 3mm increase in diameter - no thank you. Made me wonder if a machinist friend could not make one from scratch for that amount from my original 45mm one.

Friends are telling me that my present engine performance with dual IDF-40 EMPI clones is so good that I'd be a fool to go to D-Jet as there is no way it could perform as well. Even cold starts are no problem with 20 seconds of throttle-pumping all that is needed on the coldest days.

I'm going to follow DrPhil's lead on this most likely - depending on his budget. I think his budget flexibility is larger than mine.

I like the idea of using my original D-Jet with a 50mm TB & an AFR gauge which I already have. But if there is a way to get even more power with D-Jet and modern EFI benefits, I'd love to have that - if available at a reasonable cost.

GN

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

@Gatornapper

another option might be finding the GoWesty 52mm throttle body, not sure if they make them anymore, but Zach had posted on this a few years back and used one i believe on his 2056 , some modification may be necessary.

Phil