Austin_Hoke@biketrials.com
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** I did not write this tech info, it is the work of ScottieGNZ**
I have personally done the SVO injector install and it worked great. No problems with leaks and easy to do. I picked up my injectors on ebay, I believe i picked up all 6 for arond 50 bucks. Kudos to Scottie for this info:
Merkur XR4Ti/ Mustang SVO 370cc Injectors Upgrade
Any serious increase in power on a 280zx turbo motor will require larger injectors. For someone on a budget, $75-100/ea for new Bosch, RC, is out of the question. One low-cost alternative is the injectors from the Merkur XR4ti and Mustang SVO, both with 2.3L, 4-cylinder turbo. The injector used on this engine is rated at 370cc vs. 290cc (I have also heard 260cc) for the Nissan turbo. In either case, the 370cc injector should be good for about 320hp running 85% duty cycle and even more with higher fuel pressures.
These injectors have brown tops and are similar in size to the nissan turbo unit. it is not, however a direct bolt-in. The following are the 2 primary differences between the two injectors:
- The Nissan injector inlet has a barbed fitting and the 370cc injector uses and o-ring
- The Nissan injector has a single plastic cap covering the entire outlet tip and the o-ring is seated in the manifold itself. The 370cc injector has a plastic washer with an o-ring below it and a short plastic cap below the o-ring, all mounted on the outlet tip.
The modification necessary to make the 370cc injectors fit teh L28 turbo include cutting off part of the plastic on the inlet and getting rid of the plastic cap on the outlet. The plastic on the 370cc injector has a groove about halfway down from teh top. First place a small tissue in the top of the injector to prevent fillings from falling in. Next, using a Dremel, carefully cut teh plastic in the groove all the way around teh injector but be careful not to cut into the metal pipe below it. You do not have to cutt all the way through the plastic. Next, cutt from the top to the bottom of the upper part of the plastic that will be disgaurded, again being careful not to cut the metal pipe. Use a screwdriver to seperate the top piece of the plastic adn it will pop rightoff. This will expose the metal pipe below the plastic. The pipe has 2 ridges that fit perfectly into the 5/16 hose and helps to "bite" into the hose when it is clamped. Note also that the length of the exposed pipe coincidently is the same as the Nissan clamp. This is the only clamp I would recommend you use.
Pop off the plastic cap on the tip of the injector and disgaurd it. It will not be needed. BE CAREFUL NOT TO DAMAGE THE TIP ON THE INJECTOR. Romove the o-ring and seat it in the manifold, making sure it is seated properly. After assembling the large o-ring and plastic boss on the injector, spray some lubricant on the injector tip. While holding hte plastic washer on the injector tip push the tip of the injector through hte o-ting until you feel it seat. Be careful with the 2 screws and apply torque evenly otherwise that flimsy plastic boss will crack, if they are not already.
Good Luck.
Credit to BOOST for being hte first to try it and making the forum aware.
1. The HP rating for the 370cc injector was derived from a simple formula to calculate maximum HP availible at 85% duty cycle. Divide the injector flow rating by 7 and multiply the result by the number of cylinders
Sorry about not having any pics, but its pretty simple. Email me if you have any questions, I'd be glad to help.