 Stock injectors on a 2.1L?, Instead of webers |
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| mtndawg |
 Sep 21 2014, 04:39 PM
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#1
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Member  Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None 
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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?
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| Mark Henry |
Sep 21 2014, 04:41 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
If it has a carb cam ...then it's no.
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| Dtjaden |
Sep 21 2014, 06:19 PM
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Member Group: Members Posts: 232 Joined: 25-May 13 From: Morgan Hill, CA Member No.: 15,915 Region Association: Northern California |
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. |
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| worn |
Sep 21 2014, 06:54 PM
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#4
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can't remember Group: Members Posts: 3,373 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(Mark Henry @ Sep 21 2014, 02:41 PM)  If it has a carb cam ...then it's no. (IMG:style_emoticons/default/agree.gif) 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. |
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| Mblizzard |
Sep 22 2014, 04:51 AM
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
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.
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| barefoot |
Sep 22 2014, 05:48 PM
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Senior Member Group: Members Posts: 1,334 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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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. |
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| aircooledtechguy |
Sep 23 2014, 09:16 AM
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#7
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The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
QUOTE(Dtjaden @ Sep 21 2014, 05:19 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. (IMG:style_emoticons/default/agree.gif) Tunable EFI is the way to go IMHO. At least look into it. . . |
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