Goukid2

Is he still around? Did a search for reaplacement Solenoids and seen his post for his GB's that he had a year ago. Just curious if he still sells those custom Simplified racks. Pro's and cons about his Solenoids? Anyone still on the forum that has his Solenoids please respond. Im really intrested in this but just want to get info on it. Ive done the search about them but no one said anything about how they liked them or if there were any problems with them.

Goukid2

No one has a set? From the group buy responses seems to me as a few people bought them so i know theres someone.

Goukid2

oh yeah and do they work like the stock solenoids? Do you stiil see 10-8-10? Im really curious on how they function, i mean i know thre replacement solenoids but do you get fuul boost around 2500 like the stockers or what? All info about these that people know of would really hep. An yes once again i did a Search and not much on peoples responses which in my book count. Thanks fellas!

Lesly

dgeesaman

iTrader: (7)

Yes, these will produce the same 10-8-10 boost pattern. Solenoids are just pneumatic on/off switches. These will do the same thing as the stockers, only more reliably.

Dave

Goukid2

Hey Dave thanks for the PM reply. Im gonna try and get a mity vac this weekend and test out the few that i have and i'll let you know the results.

dgeesaman

iTrader: (7)

Get the Mityvac Silverline Plus kit. The extra features are worth the $15.

Stix37867

iTrader: (1)

I'm not sure if he still makes them but they are definetely worth it. Cleans everything up and gets the solenoids out of the high heat temps. I've personally noticed that they actually react a little faster. My boost is more like 10-10-13. There's no dip in boost during transition.

rx slim

My solenoid rack is currently out of the car. . .it would be a good time for me to consider an upgrade. Is he still around?

Stix37867

iTrader: (1)

Doesn't look like he is around here anymore. profile says last signed in on May of last year. Too bad, great product...

Goukid2

Does anyone have a set that there selling or know somone who's selling a set? Anyone know how i can reach him? No Luck on the Phone number or e-mail, maybe because of the weekend so i'll try tomorrow. But any other info will be great.

littlecat

I have a set - they are great haven't had any vacuum related problems since I put these on.

here is a thread that has pics of my install, though I will probably be relocating them for an upcoming intercooler install...

https://www.rx7club.com/showthread.p...ustom+solenoid

fsae_alum

Yeah....I haev personally sent about half a dozen emails to saxyman asking if he's still doing the solenoid kits and I might as well have been sending them to a black hole in outer space. Nothing in terms of a response. It's a shame as this is something the FD community really needs.

Goukid2

I found him, well he actually found me. But He does still make them. He told me that he will be back in town in a few days and will be more than happy to make me a rack. I sent him a bunch om PMS as well but like it ws stated above he hasnt been on the forum in a long time. You have to E-mail him personally. I sent him a E-mail I believe 3 days ago and he just got back to me. Do a search in the group buy forum for his solenoids and his info will pop up with his contact info. Shoot him a e-mail and he'll reply. Peace!

ptrhahn

iTrader: (9)

Here's a note Rob wanted me to post for him:

Peter, first of all, thanks for the info and the interest.

I know I haven't been around the forums much recently (partial blame
for that can be given to the Air Force, and a paid-vacation to the
sandbox), and I give my sincerest apologies for that.

I'm currently out of town on government business, but will be returning
later this week. After I get back, I'll get in contact with all of you
guys, and we'll get something going. I don't have access to the forums right
now, so would you be so kind as to post that info for me?

Again, thanks for the info, and I'll get in touch with you guys soon!

Take care,
-Rob

fsae_alum

Well....it's good to know that he's still in the game. Only problem is that now I can't afford them. DAMMIT!!! Oh well....I do know that HDP was trying to get in touch with him to get some solenoids as well. I'll be sure to let him know.

HDP

iTrader: (2)

I found a source for solenoids. I got 4 I'll be installing very soon.

BOTTLEFED

iTrader: (1)

^PMed you^

billt

iTrader: (1)

I've been through Rob's writeup and didn't notice anything about pull-in (inrush) current or hold current for his solenoids vs stockers. He mentions resistance (measured with a DC voltage supplied by a battery), but no mention is made of pull-in current or pull-in time. Does anyone have electrical drive specs for these solenoids vs stock? I would not recommend replacing the stock solenoids given just a resistance spec. A solenoid's inherent winding inductance will determine whether or not enough current can be supplied during the pull-in time period.

saxyman990

Hello everyone. I posted a message in the GB thread, but as a quick recap: I've been out of town for almost a year now due to an Air Force deployment. I sincerely apologize to all those that may have tried to contact me. Please bear with me, and thanks for your patience.

saxyman990

I'm actually fairly confident that I fielded this question in one of my other threads, but since I don't feel like searching through all of those, and this is a great question, I'll re-address it here.

Due to the somewhat lower resistance in these solenoids, the current draw is obviously increased slightly (Ohms Law). Specs on these solenoids are a holding current of 550mA vs the stockers of around 450mA. Inrush current peaks to 600mA for 9-12 milliseconds. I'm not positive on Mazda's inrush-specs for the stock solenoids, but my testing shows slightly less current for about the same rush time. Extensive testing of the solenoid systems in operation show that this difference is negligible.

-Rob

billt

iTrader: (1)

Hey Rob-
Great to see you back & thanks for answering my question. I would imagine if hold is 550ma vs stock 450ma then pull-in of 600ma for 9-12msec would also be an increase vs stock solenoids. I really don't know what the drive circuitry looks like for various setups but I would imagine voltage would definitely vary all over the place (unless the drive is well regulated, which I doubt). Might be using constant current drive but I really don't know for sure...the electronics might also use PWM during hold but again I can't be sure. Bottom line: since these solenoids require more juice certain setups might have issues trying to pull-in at elevated temps & low voltage conditions.

saxyman990

Those are great comments, and I had very similar thoughts when I started this project a couple of years ago. Yes, the pull-in of the new solenoids is slightly higher than the stock ones over the same time period (the difference is somewhere around 0.05A), but this difference is basically negligible for the onboard electronics. I've done some pretty lengthy testing (multiple cars, ECUs, locations, temperatures, operating conditions, etc), and have yet to run into any issue.

Also, the only turbo-related solenoids to use pulse-width modulation are the two boost control solenoids (turbo pre-control, and wastegate control). I think the ISC also uses PWM.

Again, thanks for the excellent comments!

-Rob

billt

iTrader: (1)

Excellent replies as well! My main concern was when I noticed posts by people other than you claiming to have found replacement solenoids that may not work when pushed to the limits (temp, voltage, vibration, age etc.) or worse yet may not work with all drive circuits. It seems like you have everything sufficiently covered.

BTW it looks like your quality is top-notch & I am considering buying from you since this is such a great idea. I think we all appreciate your efforts (labor of love??) and I can personally empathize for all the work you must have put into this since I've been through more electronic designs (including solenoid drive) then I care to count. Thanks again for helping us all with one great modification.-bill

HDP

iTrader: (2)

Dr Jekyll and Mr. Hyde? Either that or

billt

iTrader: (1)

Thanks for the offer but I like it better when you keep your eyes open...