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View Full Version : Modifying OEM FD Primary rail for 850cc injectors


KGP
01-17-2009, 06:47 AM
Recently someone asked to have a picture posted of the process. This topic has been discussed 1 milion times, but the guy says there has never been a picture of what needs to be done.
The simple answer is to mill an 1/8th of an inch off of the top of the rail. Taking a second to think about it... the primary injectors are longer than the secondary... needing to sink the injectors into the rail further to reach the bottom , you would need to relieve what is "stopping" the new shorter one from reaching... so... mill the top an 1/8th of an inch.

Just for your viewing pleasure, I took a picture of the TOP of the primary rail.
http://kgparts.com/EBAY/Pics/primaryrailmilled.jpg

If you can not mill the rail yourself, we offer the service for $10 plus return shipping.