Hey guys. I'm a regular on the "other" board, so some of you over here may not know me. I have been asked by a few people to post this thread over here, with the suggestion that some of you may be interested. I'm open to any and all feedback pertaining to this.



First off a little background info:

I built my car with the primary function of street/autocross use (with the occasional HPDE). As such, I switched to a simplified sequential 99spec setup (I've driven a few cars with a properly set up non-seq system, and I absolutely hated it. Also had no interest in single turbo). The simp-seq is nice, but still has a few annoyances. First, it still uses the stock solenoids (I had 2 fail since I finished the rebuild, and plenty before that). Second, since I removed the rack for the solenoids to attach to, the leftover hoses and valves created a complete mess under the UIM



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So I set out to learn more about solenoids and vacuum control systems so I could build an aftermarket system. Some may argue that there really is no advantage to this, but I figured that I might as well try it out and see what happens.



Basically, what I ended up building is a completely custom 5-solenoid setup (I'm running simplified sequential, so I only have the following solenoids: Purge Control, CCA, CRV, TCA (pressure), TCA (vacuum). These solenoids can be bolted together in almost any combination imaginable.



Solenoid specs:

Viton seals

Stainless steel internals

Molded coil (resistant to water, and high temperatures)

Custom aluminum manifolds

100psi rating

Use custom #10-32 brass nipples

Better flow and reaction time than stockers

Rebuildable

Cheaper than stockers (approximately $40ea)



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Even though these solenoids can take the heat of the engine bay, I decided that I was going to move them out from underneath the UIM. Couple of reasons for that: It will help move some heat-storing mass away from that area (hopefully helping out the coils, fuel system, and intake manifold). It's a little easier to get to the vacuum lines/solenoids for diagnosis. And lastly, I think it gives it a slightly cleaner look.



I decided to place the solenoids next to the passenger fender, right behind the ABS system. There is just enough room for the solenoids in this location, and the lines aren't any longer than they were when the solenoids were under the UIM. The only modification needed, was that the wires for the airbag had to be unbolted from their bracket and lowered slightly. After that, the solenoid rack dropped right in.



Here's a few pictures of what the prototype system looked like in my car:

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-Rob

 

The system is now fully developed and is being used on a few different cars. All with excellent results.



For those that are interested, there is a group buy currently going on at the "other" forum. The deadline for this first GB is this Sunday (14 Aug), but if you're interested and cannot make this deadline, please rest assured that there will be another GB at some point.



Please let me know if you have any questions, comments, feedback, etc.







For reference, here are the information and GB threads located on the other site:

Info:

http://www.rx7club.com/showthread.php?t=404243

Group Buy:

http://www.rx7club.com/showthread.php?t=447238





-Rob

 

that looks interesting but i am all about the simplicity and power of single turbo fd's. if setup correctly they can be awesome for spoolup like in autox and road race.