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> Fuel injection Question, 76 fuel injection on 73/74 Motor ?
ILM914
post Jul 27 2023, 11:04 AM
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Hello all, Can I take a complete fuel injection system from A 76 2.0 and use it on a 73/74 2.0 motor? Thank you , Joe
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914sgofast2
post Jul 27 2023, 11:54 AM
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Probably. However, the engine might be down on power since the 1976 models were tuned much leaner to pass the tougher smog emissions regulations for 1976. The federal standards for 1973-74 years were much easier to pass than those for 1976 because there was no need for a catalytic converter on the 1973-74 models. The engine wiring harness might have some small differences too because of warning lights and seat belt interlock systems. You should check with Jeff Bowlsy about the FI harness differences.
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ILM914
post Jul 27 2023, 04:09 PM
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thanks I have a 74 wire harness maybe I could use that ? thank you much
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nditiz1
post Jul 27 2023, 04:15 PM
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QUOTE(DRPHIL914 @ Jul 27 2023, 10:22 AM) *

QUOTE(Rick986 @ Jul 27 2023, 12:49 PM) *

Just an FYI - wanted to offer it here before listing on BaT

(IMG:style_emoticons/default/aktion035.gif) Wow beautiful car , GLWTS!


If the FI is complete it should just plug into the relay board and you should be fine.
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914Sixer
post Jul 27 2023, 04:35 PM
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Yes, IF you use everything from 76 system. The thermotime switch is is different and has different plug. Distributors are basiclly the same so not a problem there.
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r_towle
post Jul 27 2023, 04:51 PM
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Yes
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JeffBowlsby
post Jul 27 2023, 07:28 PM
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It should functionally work but doubt it will pass smog here in CA. Probably not a concern for you in NC.
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ILM914
post Jul 27 2023, 09:12 PM
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thank you everybody, so if I can get the whole system It should install correct ? Also someone mentioned it might be less powerful than if I use a 73/74 system? is that true? Thank you again fellow 914ers
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ILM914
post Jul 27 2023, 09:13 PM
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thank you everybody, so if I can get the whole system It should install correct ? Also someone mentioned it might be less powerful than if I use a 73/74 system? is that true? Thank you again fellow 914ers
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r_towle
post Jul 27 2023, 09:24 PM
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It can be modified.
Get it all.

Djet can support a 2.4 liter, about 160 hp

You will learn how to tune it
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Porschef
post Jul 28 2023, 07:25 AM
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Shouldn’t matter. Someone can correct me if I’m wrong but Djet used green injectors all years. Might require a slight MPS adjustment but the power loss there was compression and the funky thermal reactor heat exchangers.
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rjames
post Jul 28 2023, 10:57 AM
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Swapping the FI from a late model car shouldn't result in any loss of power.
As others have said, it may require adjusting the MPS depending on the state of your engine vs the engine the FI is coming from, and whether or not the MPS has been futzed with already.
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ILM914
post Jul 28 2023, 11:19 AM
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Thanks guys , is it hard to adjust the pressure sensor ? how can I get that know how? Thank you
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914sgofast2
post Jul 28 2023, 12:37 PM
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There are several threads on this forum about adjusting the MPS. Tuning the system seems to be kind of fiddley and needs some "seat of the pants" tuning work unless you have the rare factory Bosch test meter. Tangerine Racing sells a kit for rebuilding the MPS which includes instructions on how to tune the MPS for your engine without the factory diagnosis meter.

The MPS, ECU, head temperature sensor, and distributor all need to be compatible with each other for the system to work acceptably. There is a website somewhere about the Djet system which contains a table of the various parts and part numbers that need to be matched in order to work well with each other.
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rjames
post Jul 28 2023, 01:23 PM
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QUOTE(914sgofast2 @ Jul 28 2023, 11:37 AM) *

There are several threads on this forum about adjusting the MPS. Tuning the system seems to be kind of fiddley and needs some "seat of the pants" tuning work unless you have the rare factory Bosch test meter. Tangerine Racing sells a kit for rebuilding the MPS which includes instructions on how to tune the MPS for your engine without the factory diagnosis meter.



A ‘Bosch test meter’ is not needed.
You just need a wideband sensor to read the AFR and the adjustment tools from Tangerine Racing to adjust the MPS. Everything else is pretty much plug and play.
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rjames
post Jul 28 2023, 01:23 PM
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