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914World.com _ 914World Garage _ Stock injectors on a 2.1L?
Posted by: mtndawg Sep 21 2014, 04:39 PM
I recently acquired a car that was originally a 2L and have been told the engine size has been changed to 2.1, which I have not checked yet? The engine currently has webers. Can I use stock d-jet FI if it is 2.1?
Posted by: Mark Henry Sep 21 2014, 04:41 PM
If it has a carb cam ...then it's no.
Posted by: Dtjaden Sep 21 2014, 06:19 PM
What you can do is use most of the stock d-jet components except the ecu, cold start valve and throttle position sensor and then add an aftermarket ecu, Megasquirt in my case, with a few newer sensors for throttle position and intake air temperature.
This can be done for as little as $500 if you DIY or as much as $2,500 if you have someone do the work for you.
As far as the injectors are concerned the 2 liter d-jet injector flow rate is sufficient to support almost 200 hp.
Posted by: worn Sep 21 2014, 06:54 PM
If it has a carb cam ...then it's no.
So if you can find out about that detail you have an answer. Yes, I have a 2056 running stock FI, but working around an aftermarket cam has been tricky. Impossible if the cam were designed to take advantage of the Webers.
Posted by: Mblizzard Sep 22 2014, 04:51 AM
The newer FJ67 injectors that are sold as replacements for the Bosch have slightly higher flow rates. I am running a 2056 with stock FI and cam with no issues.
Posted by: barefoot Sep 22 2014, 05:48 PM
If you're after a cheap option to try, you can increase the fuel pressure to the injectors by adjusting the pressure regulator. Probably best to install a pressure gage in there to what you're doing. Remember that flow rate is proportional to the square root of pressure to your injectors, thus is you want 10% more flow you need to increase pressure by 1.1 squared, or 21%.
Since you're only increasing displacement by 5%, in theory you'll only need 10.25% pressure increase.
Not sure just how much a stock pump is capable of putting out however, no experience there.
Posted by: aircooledtechguy Sep 23 2014, 09:16 AM
What you can do is use most of the stock d-jet components except the ecu, cold start valve and throttle position sensor and then add an aftermarket ecu, Megasquirt in my case, with a few newer sensors for throttle position and intake air temperature.
This can be done for as little as $500 if you DIY or as much as $2,500 if you have someone do the work for you.
As far as the injectors are concerned the 2 liter d-jet injector flow rate is sufficient to support almost 200 hp.
Tunable EFI is the way to go IMHO. At least look into it. . .
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