injectors cap styles, any performance difference |
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injectors cap styles, any performance difference |
Valy |
Aug 10 2011, 10:36 AM
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#1
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Senior Member Group: Members Posts: 1,676 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
I've seen 2 different cap styles on injectors.
Is there any difference in performance between the 2 styles? Those are L-Jet injectors that are lower flow than the D-Jets but I don't think L-Jet or D-Jet makes any difference on this topic. |
type47 |
Aug 10 2011, 11:55 AM
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#2
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
I don't know; I was searching around for injectors and info on flow rates for injectors and found little difference in flow rates, in fact, one site listed the same injector for a 1.8L and 2.0L engine (albeit, the engines were L-Jet buses). I wanted to swap 914 1.8 injectors for a Vanagon 2.0L L-jet while the bus injectors were out for cleaning and flow testing.
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john rogers |
Aug 10 2011, 12:40 PM
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#3
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
If I remember correctly the nub on the cap of the upper injector in the picture causes the fuel spray to start lower in the chamber and results in a less efficient fuel spray pattern and a slightly lower horse power rating from the engine. I think the large cap on both is the same diameter and also the same length? You could measure them to be sure.
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Drums66 |
Aug 10 2011, 05:14 PM
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#4
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
........Ljet bus injector's.....don't know flow rate?
they will work in Ljet 914! (IMG:style_emoticons/default/bye1.gif) |
Valy |
Aug 10 2011, 07:35 PM
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#5
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Senior Member Group: Members Posts: 1,676 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
Those are injectors from my 914 Ljet. They all work fine except that are too dirty so, I want to send them for cleaning.
I just want to use the opportunity to put the same caps on all of them and was asking if there is any performance benefit from one cap or the other. The additional tip is hollow so it's there just to protect the injected stream from the air-flow in the manifold. I don't know if that helps or not since newer injectors don't have that anymore but, the lip is there for a reason (IMG:style_emoticons/default/confused24.gif) |
draganc |
Aug 10 2011, 09:44 PM
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#6
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Senior Member Group: Members Posts: 725 Joined: 2-November 09 From: central new jersey Member No.: 11,000 Region Association: North East States |
Have a look as well at following topic:
http://www.914club.com/bbs2/index.php?show...p;#entry1096060 Regards, Dragan |
SLITS |
Aug 10 2011, 09:47 PM
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#7
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
The caps are there to protect the pintle ... nothing else!.
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McMark |
Aug 10 2011, 10:30 PM
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#8
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
(IMG:style_emoticons/default/agree.gif) it's what's up inside the injector that makes a difference between 914 injectors and modern injectors. Bottom line, run either one as long as the flow rates are correct.
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Mike D. |
Aug 11 2011, 07:40 PM
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#9
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OK, It runs now, and pretty good too! Group: Members Posts: 1,445 Joined: 3-January 03 From: Santa Clarita, Ca Member No.: 85 Region Association: None |
I ran my last 4 cyl. car with Jaguar XJ12 injectors from the junk yard. The XJ was 6 liter I think, so four cyl. would be 2L. Didn't check the flow rate, tho.
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Valy |
Aug 11 2011, 09:34 PM
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#10
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Senior Member Group: Members Posts: 1,676 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
Of course it run with the Jag injectors. They have the same flow.
My question is not about flow at all. I'm asking about the Injectors CAP style. Which of the two caps is better for performance? I have the opportunity to choose whichever I want but can't make an educated decision. |
SLITS |
Aug 12 2011, 07:12 AM
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#11
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Well then, the best course of action would be to run without the pintle cap at all. Spray pattern is determined at the nozzle, not the protective cap. If the cap had anything to do with it, it wouldn't pull off easily. The spray created would push the cap off and be melted in the combustion chamber.
Of course, you might just damage the pintle on installation, junking the injector. |
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