pjh97

I bought FD3s and 99+ spec turbo.

I want to use mine as a daily driving car.

My question is "Which setup is more reliable for daily driving?"

Non sequel doesn't get boost until 3800 rpm, does it?

That means that if I drive under 3800 rpm, it's like driving NA, huh?

It sounds like more reliable, cuz many 2nd NA rx7s run over 150k.

How do you think about this?

I don't mind about the lag as long as I can get 13s car.

And, I have one more question. Do you guys think that do I have to go full or rikki style?

crap.. I have on more.. ^^.

How about noise?

I think I'm gonna get DP and 99+ spec turbo and hi-flow cat and RB dual tip. other than many things gonna stay at stock.

Snook

iTrader: (12)

non is more reliable but you may wear out the turbos faster some say

what ecu do you have? you'll need one

yes the car is louder in non seq.


I ran in the 12s with the rikki method non seq.
the full way would make the car faster but harder to go back to seq. if you wanted to.

I believe seq. is more fun but I don't remember really

turbogarrett

iTrader: (1)

if your seq system is working fine, i'd say leave it alone. i've had my car rikki style non seq for about 4 months now and it is really not that bad. it is louder, but i do like the linear powerband. my car would start building boost at ~2k rpm and would get full boost ~3800 rpm. i am interested to see how my new, ported turbos and manifold will spool up.

rynberg

If it ain't broke, don't fix it!

Especially for a daily driver, the sequential set-up is much more fun to drive than non-sequential. Without a midpipe or a streetport, you will have pretty bad lag.

IMO, the only reason to go to non-sequential is if you are regularly road racing or if you have a problem with your sequential system that proves unsolveable.

Zyon13B

Do a search, there is another post on this that debates it to death. you will find all the pitfalls and praises of both. Then you can decide.

911GT2

Since I started the "other thread" and it was mine and Mahjik's debate, I should probably chime in, right?

The short version:
Sequential, yes, no, you can run 11s with non-seq, it's a little louder.

Now to really answer your questions:
Sequential is more reliable, there is about 100 feet less of vacuum hose to break. There are 20 or so less solenoids to break.


Full boost doesn't arrive till just about 4000 rpms on my car (downpipe and intake only) but I can get 5 psi at 3k, so it pulls pretty hard from there. It's not like driving a N/A, it's like driving an extra laggy single turbo.

Many people have run 11s or better with non-seq, 13s should be attainable with a stock car.

It's a little louder, but you get used to it. If you go with a relatively quiet exhaust like the RB dual tip as you mentioned, noise shouldn't be an issue (good choice BTW, it's on my wishlist too ) With that, and a high-flow cat, you should see full boost by 3500 rpms or so.

Mahjik

iTrader: (1)

BTW, you can run 11's or better with seq. It's been done as well.

911GT2

I thought that was obvious...


Those were both supposed to say non-seq, sorry for the confusion

Mahjik

iTrader: (1)

Not really. The way you worded it made it seem as if only non-seq cars could do 11's or better. Probably would have sounded better if it was something like "Both non-seq and seq cars have run 11's or better".

It's not necessarily more reliable. It does have more parts than the non-sequential setup, so there is more room for error. However, just like anything else on the car, proper care is all it needs. Neglect anything and it will eventually have problems.

IMO, I agree with rynberg. If it ain't broke, don't break it.

It's not really like driving a NA. The turbos are still spinning even when they aren't being used. You really wouldn't be saving anything.

The problems with these cars not lasting long have to do with heat and/or improper modding. If you don't get crazy with mods, then half of the battle you won't have to fight. The other half, well the turbos do put out a LOT of heat. However, get yourself an aftermarket temp gauge, vented hood and aluminum radiator; you'll be all set.

If you go full non-seq, you will have "slightly" more airflow. That is really the only way to do it if you are going to do it.

rceron

Just try the rikki style and test it out. You can reverse it real easy. Experiencing it is the best way to decide.

More input on the matter:

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

Ramon

lennie_hughes

i'd get to know the car 1st before going out to do major surgery.......
does it have a boost gauge, has the stock radiator been replaced with a larger, cooler running one, have you replaced the precat with a downpipe, what about a cat-back system? replaced the stock air box?

these are all mods that can be done and you won't have to get into fuel managent & hi priced componets right away, hell just removing the precat and putting on a downpipe with give you goosebumps when you hit the accelorator and that'll only set you back a couple hundred bucks...........

t

LetsGO7

iTrader: (2)

hey dudes....do you have port the wastegate for non-seq. setup? What i mean is that, do you have to or can you run the non seq setup and eventually port it.

Thanks

-joe

Herblenny

iTrader: (13)

I thought about Non-seq.. and recently really considered it because of my 2nd-ary turbo.. But you know, I love that feeling of 2nd turbo kicking in.. instead of all at once.. Just me.. I know ton of people who prefer non-seq..
Thank god, my seq system is all good.. If emission is not an issue for you, then you should do the turbo simplification.. I recently done it and it makes things easier to check and fix..

widebody2

I've had both and though seq. was 10X more fun. I had bnr stage 2s with the real non-seq set up. Made way more power and still thought it was more fun just with the stock seq set up.

artguy

artguy

I honestly dont see how you can argue for non-seq when your car performs that way homie. you have 2500-3k worth of strong powerband there...seems narrow to me.

with sequential I have sixteen lbs of boost by 2800rpms.

I ran mine non seq for a while...poor mans method...been there done that.

every drop of power on the bottom is more fun during normal city driving.

j


I love the quote by mahjik "if it aint broke...dont break it." my thoughts exactly. most people go non seq because they cant figure out how to fix their seq setup if a vacuum hose comes off or a solonoid goes bad. it is the easy way out of that situation. cheaper and easier.

Boostn7

>>I love the quote by mahjik "if it aint broke...dont break it." my thoughts exactly<<

Hehehe...good one.....also agree.

The seq-system is an awesome setup when working properly. Meshing the gas @ 2k rpm and having full boost(~12psi) within 200-300 rpm is nice.
Now many like that feeling of early boost but keep in mind it's only one turbo working and once you start running higher boost it becomes problematic.......alot more heat and the fast that everything happens faster...such as actuators opening and closing during transition.

Been running non-seq and will never go back.
-I get full boost(17psi) 3.5-3.8krpm in 3rd.
-HP curve is linear...feels like a single
-less gizmos operating on the manifold/intake
-at lower rpms heat is shared with both turbos rather then w/ primary one
-exhaust is always flowing thru both tubines so when I hit the gas they will spool up a bit faster. With seq-system rear turbo will only see exhaust from a certain rpm and primary turbo has to generate at leats 8psi before the transition starts to happen. Back when it was seq if I meshed the throttle @ 4-4.5krpm on that transition window it would have more lag then the non-seq setup.
-non-seq is a bit louder
-if racing the motor I never spend anytime below 4krpm so non-seq is ideal.
-at higher boost (14+) the lack of hoses/solenoids is a plus with non-seq.

So if running ~14psi or less and the seq system is working good...leave it alone
For those others running more serious boost and racing the car non-seq is the way to go.......my opinion.

Hope this helps.

SpoolinRX

iTrader: (6)

non