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morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

931 (on efi) started on the first crank

https://youtube.com/shorts/ghVBDvUOLw0?si=OR-yAs_Yc0nK7OTt
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924RACR · Posted: Wed Apr 10, 2024 9:42 pm Post subject:

Yeah, they do that; I was shocked when mine did the same!

My EFI 931 is now so reliable my wife loves to drive it without me!!! Fun to drive, easy to start, drives reminiscent of (though obviously not the same as) her 924 NA racecar... only reliable and always starts and runs perfectly! LOL
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Beartooth · Joined: 05 Apr 2022 Posts: 206 Location: Roberts, MT

Mine's a champ on cold starts - I'm really not sure how or even if it could be improved on. Hot starts are another story: in the half hour to an hour window, it can take up to thirty seconds of cranking. I've heard it's from fuel vaporizing in the injector lines, and I'm tempted to try wiring the cold start injector to a momentary switch on the dash, like others here have. Anyway, hold on to the FD and WUR from that 931 - could just be you've got one of the good ones!
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1980 931 diamond in the rough

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

Maybe wasnt clear enough,

The 931 started on efi, i didnt bother trying to start it on k-jet.
The k-jet from this car is for sale for anyone interested

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Beartooth · Joined: 05 Apr 2022 Posts: 206 Location: Roberts, MT

Nope, it's right there "(on efi)" My bad!

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1980 931 diamond in the rough

morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

The first EFI kit installation is done, meaning the car started and drives.
This is a 76 car, quite a bit different from the one i developed the kit on so there were some hickups here and there, but i have learned a lot from that.

My 931 EFI installation is also complete, and that one went smoothly as it is a late car.

Anyway, below is the EFI kit on a table, thanks to Frank for providing the picture.

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morghen · Joined: 21 Jan 2005 Posts: 8883 Location: Romania

Did a brief overview and general guide for the EFI kit based on my 931 installation.

https://youtu.be/ais85MD-MAw
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barnwerks · Posted: Sun Apr 21, 2024 11:07 pm Post subject:

Great job on the video Morghen. I really appreciate your attention to the details and the effort to complete this conversion kit in a way that can benefit so many of us.