What is this setup? 8 injectors for SR?

[94_240sx]

4 big injectors not enough? I'm also curious what the hump on the valve cover is for.

[Hoffman5982]

I'm also interested in the reason for the injectors. As far as the hump if you're referring to the weld on the front of the cover it looks like a ve head with a rwd valve cover made to fit

[zooopreme]

8 injectors are to accommodate for more power, not sure about the hump is though. It looks like it's to support the bolt that entire fuel injector set-up

[Dittoz7]

Hump more room for big a** cams?

[Madhatter969]

I'm not sure if its the same thing on this car, but ive helped plumb lines for a motor that had 4 high out put injectors and 4 low out put injectors. When your cruising, the low outputs are on, when your on it, the high out puts seamlessly turn on as the low out puts turn off. You can set it to switch over which sets are working and at what point via standalone. (rpm, psi, throttle position, ect.) That's what I would assume from that setup, although I could be completely wrong. lol

[scooz14]

I'm not sure if its the same thing on this car, but ive helped plumb lines for a motor that had 4 high out put injectors and 4 low out put injectors. When your cruising, the low outputs are on, when your on it, the high out puts seamlessly turn on as the low out puts turn off. You can set it to switch over which sets are working and at what point via standalone. (rpm, psi, throttle position, ect.) That's what I would assume from that setup, although I could be completely wrong. lol

you are exactly correct. the bigger the injector, the harder it is to get a good flow pattern at low injector pulse widths. therefore, smaller injectors are used for low load situations like idle and cruise, and the higher output injectors kick on in high load conditions, ie WOT.

[Madhatter969]

Pretty gangster setup if you ask me..

[Lobo240sx]

Hump more room for big a** cams?

That is the same thing I was thinking. Ridiculous setup. Pop that valve cover off I bet those cams are huge like Mazworks.

[OM3GA]

Maybe they cut the front off and put that plate on there so they could easily remove the front section to adjust cam gears during tuning.

[project213]

id punch baby seals with spiked brass knuckles to have that sr setup sitting in my car

[sly240]

It could be for a duel fuel setup. Basically you have 1 system with its own injectors for a lower octane fuel (pump gas like 93 or 91) and a second complete system for a high octane racing fuel like 110. Then you can tune it to run like 90% pump gas and 10% racing gas at low rpm and cruising then when you go full throttle it ramps up to 10% pump 90% racing. Obviously this is simplified to describe it. The reason you do this is so can drive on the street without having to find race gas every time you fuel up. From what I have heard it works great but is rare because you have to have a completely separate fuel system with a tank, pump and everything else to.

[Lobo240sx]

^ Only place I've heard of this kind of setup is Nelson Racing. They used a setup like this in a RX7 with a 454. 1700hp "on a conservative tune" lol.

Watch at around 2:20 and he explains both fuel cell setups.

[youtube]http://www.youtube.com/watch?v=KB1Wrv0SiyQ[/youtube]

[killernoodle]

It could be for a duel fuel setup. Basically you have 1 system with its own injectors for a lower octane fuel (pump gas like 93 or 91) and a second complete system for a high octane racing fuel like 110. Then you can tune it to run like 90% pump gas and 10% racing gas at low rpm and cruising then when you go full throttle it ramps up to 10% pump 90% racing. Obviously this is simplified to describe it. The reason you do this is so can drive on the street without having to find race gas every time you fuel up. From what I have heard it works great but is rare because you have to have a completely separate fuel system with a tank, pump and everything else to.

No, if you look at the picture it is a common fuel rail.

My guess is that it is difficult to find big injectors for the SR, so why not just use 2x as many? Also, 8 smaller injectors would have better resolution than 4 huge injectors. Plus bling?