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fjmuurling

RC Injectors

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I'm planning to replace my old Injectors with RC Injectors.

Are they a straight swap or are modifications needed as their dimensions are slightly different than the original ones. (Lengthwise)

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They are a straight swap, though they are a little short. SO make sure you clip them in the top slot on the injector.

The spry pattern is different, but I've only heard good reviews.

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3 hours ago, Vulcan Grey said:

They are a straight swap, though they are a little short. SO make sure you clip them in the top slot on the injector.

The spry pattern is different, but I've only heard good reviews.

So that means using the O-ring Groove?

Price wise there is almost no difference between the five-o injectors and the RC Engineering ones nowadays.

The Five-O primary ones (E5ZE replacements) are now 380 cc/min instead of 370 cc/min and 2.7 Ohm. Both values are a little too high for my liking.

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yeah some people have had problems with the newer Five-O green and black injectors in the Esprit...

Not the o-ring groove, the slot in the plastic under the o-ring for the rail clips.

Use the top-most slot on the fuel injector for these clips

YJ_0xMhfuLwnVvkiKmMhA7zQj4SiNnSz6qB4usbX

Slots seen here in the yellow, just under the blue o-rings. for example

udA0yqDm_tlx8k3fQ0T-0ZoHjjHUi4v6vQa2KOUE

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Some of the Bosch ones have double slots, the RC ones only have a single slot for the clip, thats why the question of using the o-ring groove

I send RC Engineering an email for dimensional information, I got some of the dimensions but not the slot ones. so requested them also. 

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2121606618_lotusfuelinjectordimensions.thumb.jpg.4d5a23442c89ff0dee5a42be51d3f48c.jpg

66 o-ring to o-ring bosch
75 total length  
11.5 clip slot from end  
14.6 o-ring dia  
16 body dia  
     
60 o-ring to o-ring RC
70.8 total length  
8.7 clip slot from end  
     
     
66 o-ring to o-ring Five-o
74 total length  
10.8 clip slot from end  
14 o-ring dia  
17 body dia  
     
     
14.6 o-ring OD  
3.62 o-ring cross section dia  

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On ‎11‎/‎09‎/‎2018 at 02:16, Jphoenix13 said:

Oops, my mistake, I replaced mine with five-o injectors. Still working fine.

Hi Jim, @Jphoenix13

Which Five-O Injectors did you fit? (the "older" brown top or the newer 380cc ones)

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the RC units fit just as Travis indicates.  No drama, 

I converted to sequential injection and COP using five-0 black ops injectors and AEM Infinity ECU.  The values I listed for five-0 are for the black ops 840cc/min injectors from that project.  I ditched the secondary injectors.  I measured and sketched everything to ensure the black ops would fit well.

the sketch also includes the rail and intake injector seat dimensions as well as the distance between them (the top part of the sketch)

(I have 6 RC injectors that only have 2000 miles on them for cheap if you want them as a result of the ECU conversion)

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5 hours ago, fjmuurling said:

Hi Jim, @Jphoenix13

Which Five-O Injectors did you fit? (the "older" brown top or the newer 380cc ones)

Just had them out and the bodies are black with green tops. Don't recall what cc, sorry.

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does the same injectors from a SE fit in a S4s???

 

https://www.ebay.co.uk/p/RC-Engineering-Peak-Hold-Fuel-Injectors-Lotus-Esprit-Turbo-SE-1989-370cc-4/20009704336

 

because it only says: for Lotus Esprit turbo SE (and not for S4 or S4s or Sport 300)

 

because SJ sportcars will also sell them and they say its the same for all models:

 

https://www.sjsportscars.com/parts-and-accessories/SJ910E0070.htm

 

what do you guys think?

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12 hours ago, Vulcan Grey said:

Yes same for all 89+ 4cyl, SE-S4s and Gt3

Many thanks for this anwser !

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On 10/12/2018 at 16:29, Tocus said:

does the same injectors from a SE fit in a S4s???

https://www.ebay.co.uk/p/RC-Engineering-Peak-Hold-Fuel-Injectors-Lotus-Esprit-Turbo-SE-1989-370cc-4/20009704336

because it only says: for Lotus Esprit turbo SE (and not for S4 or S4s or Sport 300)

because SJ sportcars will also sell them and they say its the same for all models:

https://www.sjsportscars.com/parts-and-accessories/SJ910E0070.htm

 

what do you guys think?

Buy RC injectors directly from John at WC Engineering. Great prices and technical support  http://www.wcengineering.com/esprit/fuelinj.html

 

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