Advice on EFI injector to replace MFI

[911pcars]

Did I miss the source for these injector blocks and their cost?

Sherwood

[Nitrometano]

this project is interesting, I would like to do it to my 72 911T.

[BoxsterGT]

Details, details.............
How is it running?
What injectors did you use?
Did you find ones w a long nose to reach the port wall?
Any driveabiliy problems?
Please keep us advised.
Len

[Fdalgas911T]

Yes, the EFI injectors are snugged into the injector holes. I am in the break-in period with only a few hundred miles on the engine. The car is certainly driveable however I am reserving judgement to recommend this to others at this point. The car idles well, accelerates well, feels good overall. I am currently working out some gurgling and backfiring issues that sometimes occur during deceleration and have made significant progress thus far. These are minor issues at present. It is just a matter of logging, evaluating and tweaking the Motec unit fuel and ignition settings/talbes/charts/graphs. While this process is easy to perform, it is tedious and takes time. My current plan is to perform the final tuning on the dyno using an experienced engine tuner when the engine is fully broken in. I am seeking benchmark comparison information and would like to drive other similiar 911s so I can evaluate. At present, I'm confident current minor issues can be tuned away. Would appreciate any dyno charts or comment from any pelicans with experience tuning unique engine configurations comparable with mine.

[CliffBrown]

Originally posted by Fdalgas911T
I am currently working out some gurgling and backfiring issues that sometimes occur during deceleration and have made significant progress thus far.

Do you have a switch in the system to stop fuel flow with a closed throttle and the RPM above 1,500?

Thanks for doing the R & D work.

Keep up the reporting, a great read.

[beepbeep]

Originally posted by Fdalgas911T
I am currently working out some gurgling and backfiring issues that sometimes occur during deceleration and have made significant progress thus far.

Zero the tables with high vacuum above 1200 RPM, thus enabling fuel cutoff on deccel. It will take care of popping.

[lateapex911]

I kinda like gurgling and snapping on the overrun, LOL..

[beepbeep]

Originally posted by lateapex911
I kinda like gurgling and snapping on the overrun, LOL..

It fouls the plugs and dilutes the oil. Also, it might damage ze auspuff.

[John S]

Hi Fdelgas911T, I as following your efi conversion with great interest. Keen to know how it is going. Thanks for sharing so far....

[Lukesportsman]

Yes, many of us are looking for updates.

[1glengeorge]

enrolling in this class.

[kenikh]

Been wanting to do this for years. Glad to see someone got of their a$$ and did it. Kudos.

[70SWT]

+1 to these questions...

Originally Posted by BoxsterGT

What injectors did you use?
Did you find ones w a long nose to reach the port wall?

[1972_911T]

Any updates on this? did you manage to get the engine tuned ok? did the injectors survive placement in the heads? I would like to do this on my 3.0 and have my heads off ready so now would be the time for me to do the machining.

This would be really cool if it worked out.

Regards Steve

[shbop]

Just wanted to bump this for an update. Any new information on how your car is running?

[Danny_Ocean]

Here is the last post by "Fdalgas911T" (2/7/07)...

Upgrade 2.4 to 2.5?

Perhaps someone should send him a PM?

[davidbir]

This thread died while still educating a lot of people--any updates?
Anybody else do this?

[kenikh]

Hoping another bump will get a summary. Fdalgas911T was last on the forum May '09...