850cc in Primary fuel rail how to?
Thread Starter
Joined: Oct 2002
Posts: 3,793
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From: Southern California
850cc in Primary fuel rail how to?
I've searched, so please spare me the ball busting 
Has anyone done a write up on how to install the stock 850CC injectors into the primary rail.
If not, can someone explain what has to be modified for this to work.
Thanks
Has anyone done a write up on how to install the stock 850CC injectors into the primary rail.
If not, can someone explain what has to be modified for this to work.
Thanks
Joined: Oct 2001
Posts: 4,772
Likes: 2
From: My 350Z Roadster kicks my RX7's butt
Some people have used two o-rings, one guy made a metal shim spacer thing but my favorite is...
http://www.gothamracing.com/catalog/...roducts_id=862
http://www.gothamracing.com/catalog/...roducts_id=862
Thread Starter
Joined: Oct 2002
Posts: 3,793
Likes: 1
From: Southern California
Originally posted by GoRacer
Some people have used two o-rings, one guy made a metal shim spacer thing but my favorite is...
http://www.gothamracing.com/catalog/...roducts_id=862
Some people have used two o-rings, one guy made a metal shim spacer thing but my favorite is...
http://www.gothamracing.com/catalog/...roducts_id=862
but that does not tell me how to do it myself. Can you clarify how the double o ring thing works?
Joined: Oct 2001
Posts: 4,772
Likes: 2
From: My 350Z Roadster kicks my RX7's butt
http://www.turborx7.com/fuelsystem.htm
https://www.rx7club.com/showthread.p...imary+injector
https://www.rx7club.com/showthread.p...injector+oring
I found that some extra o-rings were needed to keep excess fuel from finding its way into the engine.
Click here for a picture of an 850cc injector with an extra "spacer" o-ring to force the original o-ring to rest as close possible to the injector tip.
Click here for a picture of the fuel-safe o-ring not installed.
Another alternative would be to grind/mill/file about 1/8" from the top of the primary injector rail. This would allow the 850cc injectors to rest a little deeper in the rail and make a good seal at the tip o-ring.
Click here for a picture of an 850cc injector with an extra "spacer" o-ring to force the original o-ring to rest as close possible to the injector tip.
Click here for a picture of the fuel-safe o-ring not installed.
Another alternative would be to grind/mill/file about 1/8" from the top of the primary injector rail. This would allow the 850cc injectors to rest a little deeper in the rail and make a good seal at the tip o-ring.
https://www.rx7club.com/showthread.p...injector+oring
Last edited by GoRacer; May 28, 2004 at 11:48 PM.
Rotary Freak
Joined: Jan 2002
Posts: 2,171
Likes: 1
From: Nashville Tn
You can mill .125 thousands off of the top of the rail . The shorter injector will then sit lower and the 0-ring will seal . No need for extra o-rings .Just insert the injector and replace the top .I have read that some people file or sand the .125 off .
Thread Starter
Joined: Oct 2002
Posts: 3,793
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From: Southern California
HA...You rock!!!
Thread Starter
Joined: Oct 2002
Posts: 3,793
Likes: 1
From: Southern California
Originally posted by duboisr
You can mill .125 thousands off of the top of the rail . The shorter injector will then sit lower and the 0-ring will seal . No need for extra o-rings .Just insert the injector and replace the top .I have read that some people file or sand the .125 off .
You can mill .125 thousands off of the top of the rail . The shorter injector will then sit lower and the 0-ring will seal . No need for extra o-rings .Just insert the injector and replace the top .I have read that some people file or sand the .125 off .
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