GarageBoy

Doesn't your low end get soggy? Are they more powerful? Thanks!

Mahjik

iTrader: (1)

Most people convert to non-seq or a single turbo because the sequential TT system is extremely complicated.

Just search the forum for "boost problem" and you'll see. Removing the sequential TT system from the car can remove quite a few headaches, however, yes the power range of the car will be different.

Generally you can get a lot of power out of a large single turbo. It really depends on what you use your car for as to how you go about modifying the car.

GarageBoy

can you convert back?

ShortBusRiot

What kind of a difference? More power, less power or more low power and less high end power or what?

Mahjik

iTrader: (1)

That depends on whether you do the FULL non-seq or just the "half-*ss" simple conversion people usually do. If you do the simple one, you just simply reverse what you did.

The power is the same unless you do the FULL non-seq conversion. The full conversion removes the flaps/actuators so in theory it should allow for a little better air flow which will result in a little extra boost. Nothing like 5 or 6 extra pounds, but every little bit can help. But, that is with the full conversion:

http://www.scuderiaciriani.com/rx7/non-sequential.html

With the simple conversion, basically the power is the same as sequential mode, it just comes on a little later. More easier to predict for some people. Most people do it because they are having boost transition problems so it's easier to remove it than to fix it.

meddle

I went non sequential beacuse of boost problems. You don't gain and power really, but the lag isn't really bad and its nice to have predictable, reliable boost every time oyu floor it.

jpandes

I went non-seq because I had boost issues for years with my seq system. I followed the instructions with pics on this site: www.dontbearikki.com

The conversion can be done in less than 2 hours. 1 if you know your stuff. Reversable. Try it. If you don't like it, switch back.

I like it. I get max boost by 3800 rpm. 3600 in 5th. Lag is noticable but my mid range is better.

GarageBoy

what about singles?

Mahjik

iTrader: (1)

What exactly is your question about singles?

There are various single turbos. Generally, the rule of thumb is the more power the produce, the longer it takes to get that power.

However, it may seem like "lag" on some of the single turbos but in reality some of them are producing as much if not more power in those lower rpms than the stock twins. It's just because so much more power is coming at the high end that it has the effect of "lag" in the lower rpms.

vudoodoodoo

Your engine bay will look a lot cleaner with a single turbo setup.
As for the whole "lag" thing, it all depends on the turbo you get.

kwikrx7

I've always felt the sequential twin turbos were the best thing about the FD. It definitely is not that reliable but believe it or not I had more problems with my non-seq setup (primary turbo was bad, non-seq setup was fine) With non-seq, your boost will come online about 700-1000 rpms later so there is noticeable lag and the car isn't as fun to drive. If you drive in higher rpms or like to downshift alot, non-seq will be great for you.

As Mahjik stated, there is plenty of power to be had with single turbos. At higher boost, some produce twice the hp of a stock FD so the it might seem a little laggy but that's because of the incredible power you're about to have blasted into your tailbone. I have the best of both worlds - upgraded sequential twins..no lag and good high end power.

GarageBoy

What is a good turbo manufacturer for the FD3S? Garett, KKK? Also, how can you solve the lag with both singles and non seq?

Edit: who upgrades turbos?

Mahjik

iTrader: (1)

They are all pretty decent. As I said above, it depends on what you are trying to accomplish as to which turbo setup you want/need.

You don't (unless you use sequential twin turbos).


http://www.lourdsmusic.com/bnrsupercars/turbo9395.htm

GarageBoy

What set up would be good for a engine to be used on a road course and street? Again thanks!

Mahjik

iTrader: (1)

lol, get the car first. Then if/when you have the money you can think about turbo upgrades/changes.

Usually turbo upgrades are one of the last modifcations done to a FD since they usually require the most changes/money.

I'll bet you'll be perfectly happy with the stock twin turbos (provided they are in good condition) when you get an FD.

Shinobi-X

I'm going non-seq. for boost problems, simplicity, and to achieve greater power on upgraded twins. With an open exhaust, lag is less of a problem. Besides, when racing, you rarely drop below 3500 in the RPM range anyway, so the boost will be there when I need it. Driving around with a bit of lag on regular days is fine with me.

Shinobi-X

BTW, I'm curious to know why on earth would you want an FD in brooklyn NY? How the hell will you "drive" the car?