I know, why ruin a good thing right?

In prep for a single. Thats my excuse and Im stickin' to it! (My seq system worked fine)

Anyway, decided I would try non-seq, see how I liked the 'single' feel.

Well, initial report: love it. So far, I dont miss my sequential set up at all, but do not take this as advice to do the mod. I made my decision after 2 years of reading, not because I felt it would give me more performance, or it would cure some problem.

Methodology:

I did the FULL deal. Removed all flapper doors, and replaced with pipe plugs, partially ported (may not do anything, never know) the exhaust and intake manifolds.

Efini y-pipe non-seq modded.

Power FC

Full 3" turbo back exhaust w/ midpipe (2 magnaflow's, sounds very low and is fairly quiet)

New wiring harness with all extraneous wires removed. (780, ouch)

Greddy BOV, polished IC pipes, polished elbow, polished intake pipes

Removed the stock bypass valves, drilled and tapped holes for pipe plugs.

Halman MBC

Hole host of new coolant lines, gaskets etc....


Anyway, just took it out for a shake down run. I have a vacuum leak somewhere, or something, because the idle was fluctuating, steady now, but I have a part throttle hesitation. Ill dig into that in a few days when I have time....back on point. With the MBC at lowest setting, I get roughly 7-8lbs of boost, and I get it pretty damn soon. I was expecting alot more lag than I got, it actually starts making boost around 2700 or so, maybe sooner (couldnt watch too closely) and I get the full 7-8lbs around 3300-3500, again, maybe even sooner. I will put my Defi BF control unit to good use here in a few days when I get everything else figured out.

I know most of you dont like the non-seq, or may find this thread pointless, but I felt like sharing MY real world results for my FULL real-deal non-sequential mod. Have a nice day

 

I love my non-sequential setup too (I did a full conversion)

 

Great that your opening this post. Today I was getting back to my own full non seq convertion.

I removed the big manifold flapper door, the one from the rear turbo has been welded open and the wastegate for the front turbo was ported acc. Jimlabs specs.
I did not replace the flappers by plugs, I just cut them off on the inside and welded them fix.

You mention the Y-pipe mod. You mean the flapper in the Y-pipe controlled by some sort of a vacuum wastegate? I took that one out as well and made a block of plate for it. i may ask a friend to weld it shut.

PFc has been in since a long time so that will only require to change the sequential setting and adding the MBC.

Could you let me know if this has influenced your gas mileage? As you should be able to cruise more without getting into boost.

Thanks
Neal

 

I love my (full) non-sequential as well. I have been running it for a few years now... one of the biggest benefits that I found was better gas mileage while cruising (does not get on boost as much). I love the feeling of it as well; I think my car "feels" faster, the boost is also so much more predictable.

 

could one of you guys tell me where to go so i can get instructions on how to do this mod. right now im pulling the motor for a rebuild and i was wanting to go non seq. as well.

 

I get full boost by 3800 meh... Not to stoked about that but sure beats always having to trouble shoot some vacuum leak.

I'm thinking simplifed sequential was more for me. But now I'm thinking of going with a single turbo GT35/40 to be exact so I guess it does not matter anymore.

 

This might help you...

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/non-seq-turbos-now-picture-how-505708/

I'll also add a thread I opened about the vac sheme and block off issue related to this mod. If you can advice, tha would be great.

https://www.rx7club.com/single-turbo-rx-7s-23/vac-hose-solenoid-deletion-project-552050/

Thx

Neal

 

I havent run a full tank through it as of yet, and probably wont for a few weeks because I have a few more things to install, and I really only work on my car about one afternoon a week, but Im going to say that it will most likely get better fuel efficiency for the reasons already stated.

 

Non-seq is mostly done to eliminate the hassle of trying to figure out the problem. For people that aren't all that great with looking through the rats nest, bending/squeezing hoses to check to see if they're cracked, observing hose nipples, testing solenoids this is one really good way to go around it. Which is something I did. But for others which are going single... this is a good excuse in order to "get used to" the feeling, which is also for me lol. As for finding out a source of where do it at... http://www.fd3s.net/non-sequential.html is a pretty good place... this is what I went off of.

 

I have been runing my Richman non seq for about 15000 miles and I really like it .The welding and porting takes 15 plus hours to do but the results are well worth it to me .The richman set up plus BNR stage three turbos ,on the street is a good deal .

 

What makes you think that? I'd have to disagree. There are a lot of benefits for the car from the full conversion, including less backpressure, running cooler etc. I did it back in 95 and it wasn't because of vacuum lines, although it was sure nice.

Kevin T. Wyum

 

I would like you to bring your car to the BBQ so I can see this set-up and maybe go for a ride. I'm thinking about going non-seq or just single... Got any pictures of the modified pipes/manifold?

 

Im taking it all back off tomorrow (Friday) so I can take pics then if you'd like. Ill be at the 26th BBQ, because thats the only one I can make in August (too many trips planned), but yea, np if you want a ride or check it out.

 

non-sequential rules (next to single)