k jetronic

cj011 · Post by **cj011** » Thu Mar 01, 2001 3:36 pm

i noticed a message board above discussing the k jetronic fuel injection. what cars does it come off of or what exactly is it. it sounded like a cheap positive way to do fuel injection. what are the bonuses and negative of the system. i know very little besides knowing the name so as much info in this topic would greatly help..thanks from hawaii

Steve Arndt · Post by **Steve Arndt** » Thu Mar 01, 2001 3:38 pm

Try the new FI forum at shoptalkforums.com
even though it isn't E fi

tuna · Post by **tuna** » Thu Mar 01, 2001 4:19 pm

The Bosch K-Jetronic fuel injection system was used in many different cars in the 70s and 80s. I'd say the most common place to find it is in the '77 and later VW Rabbits/Jettas. Check the wrecking yards for parts, as they are usually readily available.

It was a CIS system; that meant that the injector constantly sprayed while the car ran. It didn't spray at regular intervals like you'd expect, but it continuously fed fuel into the combustion chamber.

The K-Jetronic was a great fuel injection. The 1500 and 1600 Rabbits had a lot of power for such limited displacement and they run forever. In fact, a later development of this system, called KE-Jetronic (used in the VW 16Vs and other models) was used in the Ferrari Testarossa.

Tuna

Joseph · Post by **Joseph** » Fri Mar 02, 2001 12:03 am

To see how a CIS FI can be fabbed up including the testing of each component: http://www.dolphinsci.com/typeIV.html
injector nozzle bosses by yours truly.
Scott Fraser is a college instructor and
is really versed on this subject.
Also try http://www.millerfi.com Gary Miller
builds custom CIS systems.
Joe
Oregon Performance Products http://www.spiretech.com/~opshroud

Dave_Darling · Post by **Dave_Darling** » Fri Mar 02, 2001 3:03 pm

For one example of it on a Type IV motor (the system was bought from Miller), check http://members.rennlist.com/evill/ed1.htm

--DD

turbo6bar · Post by **turbo6bar** » Fri Mar 09, 2001 1:46 pm

OK, Bobtail, you peaked my interest. How are those cams driven? Do the 944 pistons have 24mm wrist pins? How does your distributor trigger the motorcycle coils? I am assuming the coils have built-in ignitors. Description please.

Much abliged,
Jay

Bobtail · Post by **Bobtail** » Fri Mar 09, 2001 3:17 pm

The coils are triggered using a mallory distributor with a fibre disc coated with copper and it uses the low tension side to fire the coils.think of the disc as the contact breaker.
the signal is amplified by a "built" control box.
I think the wrist pins are 24 but I'm not sure I will check.
Keep askin'