Rx7oneluv

I'm currently taking out my engine to have a rebuild done. The car is completely stock at this point, but I have plenty of aftermarket plans within a month from when I put it back together. I was curious if converting it to a Non-Seq tubros is a smart thing to do while I put it all back together. My first upgrade plans for the car are, Straight through exhaust prolly 3" piping and no cats w/universal muffler (maybe a resonater, benifits of living in MN, no emission tests), Apex'i Intake, Turbo timer, and maybe a new radiator in the future.

Should I hold off on the conversion till I add more aftermarket parts, other than what I listed. Or is it a smart thing to do now...since everything is all apart?

Curious as to what aftermarket parts people have had when they finally determined to convert it to Non-seq.

Thanks for your time

93 Touring 73k bone stock Automatic

jpandes

If your seq. system is working properly, I would not convert to Non-seq. Non-seq is fine but, I do miss the low-end power, since most of my driving is in the city. I get full boost(12-13psi) by 3800-3900 rpm in gears 1-3 and by 3600 in 4th and 5th.

I did the conversion because I didn't want deal with doing the silicon-hose-zip-tie-job to try and trouble-shoot my boost issues. I also had all of the bolt-on's at the time.

~Get your wastegate ported. You will have boost creep once you open up your exhaust. I have it now, and I only have a hi-flow cat not a mid-pipe

dubulup

Cold air intake
pullies
dp
cb
efini y
fuel computer
SMIC
ALL reliability mods


I'd lose all the seq-junk before putting the motor back together...a lot less to think about.

rynberg

You will need an ecu to run those mods. You will also need higher flowing injectors and a fuel pump to handle the 14+ psi you will be running. Porting your wastegate will allow you to lower the boost a little.

Your main problem is you have an automatic. With that much power, your tranny will be toast. Additionally, there are very few stand-alone ecu's that will handle an automatic transmission (AEM only, I think).

Your best bet is to get the engine rebuilt to handle a 5-speed (different end housing necessary?) and perform the 5-speed conversion while you have your engine out.

BTW, stay sequential if you like low-end power and/or doing any city driving.

Snook

iTrader: (12)

NOT

rceron

see https://www.rx7club.com/forum/showth...hreadid=147017

pp13bnos

iTrader: (1)

uhhhh....I love non-seq, but having a near stock car with an auto would be painfully slow down low in the rpms. Keep the car seq, until you go with the 5spd conversion, and all the bolt-ons. CJ

GoRacer

iTrader: (2)

5-spd coversion? ...just use the hold button.

Buddy Club makes a piggy back ECU version "specifically for automatics". It can change the shift points, so you don't have to use the hold button. The PowerFC also works with an auto' but I don't know if it can change the shift points. Both can be dyno tuned with their version of datlogic software.

widebody2

I like how a year ago everyone was going nuts about getting that non-seq mod....oh yeah definitely get it!!!...and now most people say not to get it...well I got it and it sucks! I hate it!

911GT2

I did it with an Apex'i intake, and a downpipe. I was having boost issues, and I knew that if I took the time/money to track down/fix that, something else would break eventually, and I wanted reliable power all the time.

Non-seq was the easiest answer, easy to do, maintain, etc. I'd say if you wanna try it, do this first

http://www.dontbearikki.com/id49.htm

It's very quick (<2 hrs with a run to the store in the middle, and a fight with vaccuum hose that was a smidge too small.), and easy to put back if you don't like it.

rynberg

I wasn't aware of the Buddy Club ecu (not exactly common around here). I was under the impression that neither the Haltech or PFC could run an automatic, only the AEM.

You still have to admit a stock auto tranny is not going to survive over 300 rwhp for long.....

jpandes

Snook

iTrader: (12)

non sequential blows so much that im not even going to put for the effort to describe how much is sucks.

I will say that it probably makes your car faster but it makes it FEEL way slower. I have a midpipe with non-sequential and to get satisfaction out of driving my car I have to take it on the highway and get past 100mph to feel the advantages. It's like a single turbo but then when the twins come on you have 290-375rwhp (depending on mods and boost) instead of easily 400+ with a single where its worth the wait on the turbo lag.

GoRacer

iTrader: (2)

http://www.first-inc.co.jp/buddyclub/m_news.htm

SUPER HIGH TECHNOLOGY
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91768 U.S.A
Attn.: Mr. Robert Shan or Charles Tsuai
TEL 909-8681116
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www.superhightechnology.com

or you can purchase the Spec B computer from jt-imports.

XSTransAm

stay sequential as long as you can... i just went non due to some boost issues.. finally i got my car working but im not at full boost till about 4500-5000 rpms... thats probably just my car tho but either way, nothing can make up for the low end punch from the sequential

kwikrx7

I love these threads since there's so much of a debate between seq/non seq. I'll provide a few points of observation I've had over the years.

I think the only reason I like non-seq is the smooth build of boost all the way to redline - there are no slight fluctuations or strange hesitations when an WOT, it just pulls hard to redline - very consistent - but besides being consistent and simple - it blows.

When I was full non-seq I had full boost by 3600 rpms in 4th gear and 4200 rpms with the BNR Stage 2s (13 psi) It did pull hard but it was poop around town and I enjoyed driving a S2000 better when carving up a mountain road

When I switched back to sequential I loved my car all over again. It pulls hard from even 2500 rpms where I have 12-13 psi already - even if it is on one turbo - it's an upgraded turbo which provides an incredible amount of thrust below transition.

I just recently raced a 400+ rwhp Trans-Am and I was caught at 50-55 mph which is debatable to downshift when he hit it. I was in 3rd and with the amount of torque his car had, I never lost a beat and ended up pulling hard by the end of 3rd gear - if I was non-seq like I was when I raced a BPU Supra a whle back - I would have been playing catch-up and might not have past him until over 100 mph - I passed the Trans-Am at 90

Stay seq unless you're having problems

CCarlisi

Even if you have problems it's not THAT hard to fix. Study the vacuum diagram, buy a couple solenoids ect and you'll be back in action.

cover8

when stating "full" non seq your talking about removing the precontrol flap altogether right? Also removing the flap from the secondary to the y-pipe outlet?

How much does the midpipe reduce the lag?

Rx7oneluv

Omg this has been one great thread....thanks for all the input everyone. I think i've made my choice. I'm only doing small bolt on apps, like the down pipe, 3" muffler, Intake. Its going to be a daily driver for the summer. I've always been a fan of 0-60 rather than 1/4 mile or 0-100. I'd kill my self with the long races, I live in MN and there is sand everywhere, from winter and shoulders, etc.

So sound like Seq will give me the early punch.....and thats all im looking for. The rest is style for me.

Thanks again all

pp13bnos

iTrader: (1)

A properly setup car with the full non-seq conversion, the car won't be that bad to drive. The way I look at it is, when my 93 had a down pipe and intake it put down 234rwhp or so. With a down pipe, mid pipe, intake, intercooler, and a power fc (not even tuned in) in full non-seq, my car made well over 235rwhp at 3,400rpms and has full boost by 3,600rpms. By full boost, I mean 13psi. I would love to race a stock fd from 1,500rpms or so, just to see how bad I would beat him

Now guys, don't get me wrong. The stock seq system is great....but lets face it....its a pain to work on. If my car had'nt had boost issues, I'd probably still be seq. But I'd never go back to seq. CJ

pp13bnos

iTrader: (1)

Did I mention, I was still running the stock cat back?

Marshall

Isn't that impossibly high?

rynberg

Yes it is. That equals 360 lb-ft of torque at 3400 rpm. Impossible with the stock twins. Now, 234 lb-ft of torque at the wheels would be believable....but not impressive.

kwikrx7

Along with what the others above said, you're pulling the popular torque/hp switcheroo - If you had 235 rwhp at 3400 rpms then you'd be shitting all over my 180 rwhp at 3400 rpms which isn't happening - I think if you raced a stock FD from 1500 rpms, your car would just stall and gag for 1000 rpms while you play catch up and then the race is over Try punching that non-seq beast of yours at 1500 rpms sometime - FEEL THE POWER!

rceron

I never timed it but I would strongly argue that my non-seq set up is just as fast as seq. in a 0-60 mph run. Now of course this is based on launching the car. If you wanted to merely accelerate at some low rpms then there would be some negative effects. But no one would race at low rpms anyway. While cruising on the street, the selection of gears because significantly more important when running non-seq.

Regardless, just do the quick non-seq. modification and test it out for a week. Opinions from other can be useful but direct experience might serve you better in this case.

Ramon