D-jetronic quick question |
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D-jetronic quick question |
jc914 |
Jan 17 2009, 08:40 AM
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#1
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Member Group: Members Posts: 289 Joined: 15-September 08 From: Miami, Florida Member No.: 9,548 Region Association: South East States |
On the FI Brain unit what does the top knob that comes out of the unit do. I have tried searching but i cannot find direct information on it.....
thanks (IMG:style_emoticons/default/dry.gif) |
JeffBowlsby |
Jan 17 2009, 08:56 AM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
Idle mixture adjustment only.
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jc914 |
Jan 17 2009, 08:57 AM
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#3
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Member Group: Members Posts: 289 Joined: 15-September 08 From: Miami, Florida Member No.: 9,548 Region Association: South East States |
Thanks for the fast reply (IMG:style_emoticons/default/biggrin.gif)
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gothspeed |
Mar 26 2009, 08:36 AM
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#4
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
Can a 1.7 D-jetronic be made to handle a bigger motor? It is my understanding that the 2.0 uses the same system, though most certainly uses a different fuel map. Has anyone uprated this D-jetronic for more engine capacity?
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roadster fan |
Mar 26 2009, 09:43 AM
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#5
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Project Frankenstein !!!!!!!! Group: Members Posts: 1,009 Joined: 24-November 05 From: Aptos, CA Member No.: 5,184 Region Association: Northern California |
Gothspeed take a look at the picture below. Not gonna have a fuel map on these boards since it uses all discreet components. The ECU's were changed over the years for improved performance (emissions, overrun, fuel enrichment, etc) but by changing the circuits on the board. The manifold pressure sensor is the key component in determining injector pulse width, as D-jet is a speed density system. It uses the Injector trigger contacts to measure engine speed.
Everything you want to know about D-jet ECU's is here Brad Anders D-Jet ECU page. Check out the other areas of his site for information about all the components of the system. Awesome. Jim |
roadster fan |
Mar 26 2009, 09:47 AM
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#6
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Project Frankenstein !!!!!!!! Group: Members Posts: 1,009 Joined: 24-November 05 From: Aptos, CA Member No.: 5,184 Region Association: Northern California |
Oh almost forgot, the MPS has been adjusted by some people to handle the changes in engine build parameters. I think Bleyseng on this board still does this. There are probably a couple of threads here discussing this. Hope this helps,
Jim |
gothspeed |
Mar 26 2009, 10:48 AM
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#7
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
Awesome posts roadster! Is it possible the injectors themselves are the same as the 2.0? Mine is the 1.7 1973 D-jetronic CA and it seems to work pretty well except it loses some power up top, which may be the throttle switch or just the modest power of the motor (IMG:style_emoticons/default/ohmy.gif). I like the fuel injection so I was thinking of adding a big bore kit and some mild porting to pep it up a tad. Other than that I am really liking my new 914 (IMG:style_emoticons/default/biggrin.gif)!!
I will look into that site to gain as much info as possible ............ thanks for the help!! |
roadster fan |
Mar 26 2009, 01:19 PM
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#8
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Project Frankenstein !!!!!!!! Group: Members Posts: 1,009 Joined: 24-November 05 From: Aptos, CA Member No.: 5,184 Region Association: Northern California |
Awesome posts roadster! Is it possible the injectors themselves the same as the 2.0? Mine is the 1.7 1973 D-jetronic CA and it seems to work pretty well except it loses some power up top, which may be the throttle switch or just the modest power of the motor (IMG:style_emoticons/default/ohmy.gif). I like the fuel injection so I was thinking of adding a big bore kit and some mild porting to pep it up a tad. Other than that I am really liking my new 914 (IMG:style_emoticons/default/biggrin.gif)!! I will look into that site to gain as much info as possible ............ thanks for the help!! Three different types of injectors IIRC, yellow top 1.7, green top 1.8, black top 2.0. I think some aftermarket ones mess with easy color identification. Shouldn't be a problem to keep it D-jet, but you may have to get some 2 ltr D-jet parts depending on how much you change internally . The ECU, MPS, Injectors, Throttle Body, TPS, etc should be matched to work right. Some parts can interchange, but check out the D-jet site for compatiblity. Orange914 built a 2056, had the MPS adjusted, and said he was happy yesterday. I heard it fire right up after sitting for some time. Jim original poster (IMG:style_emoticons/default/hijacked.gif) sorry |
jc914 |
Mar 27 2009, 06:09 AM
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#9
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Member Group: Members Posts: 289 Joined: 15-September 08 From: Miami, Florida Member No.: 9,548 Region Association: South East States |
Thanks for the Hijack the information provided is perfect
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Dave_Darling |
Mar 27 2009, 09:39 AM
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#10
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
Green plastic == 2.0 injector
Yellow plastic == 1.7 injector Black plastic == early 1.7 injector, possibly from a VW application Blue or purple == 1.8 injector Aftermarket injectors can be different colors, of course. --DD |
gothspeed |
Mar 27 2009, 10:41 AM
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#11
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
So seeing how the 2.0, 1.7 & 1.8 injectors are different colors, I would assume that can be interpreted that they have different flow rates? What other 'component' differences between the 1.7 & 2.0 D-jetronic are you aware of?
As I mentioned earlier I will be going with a 8:1 compression 96mm big bore kit, mild porting and maybe even a 2.0 cam if there is a difference .... (IMG:style_emoticons/default/smile.gif) |
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