I have a 93' FD and my turbos were rebuilt about 1.5k miles ago, my engine was rebuilt around the same time. I don't think I would ever go to a single turbo, I love to feel the low end and top end power, its unique, the only other car that Ive felt similar is the TT Supra because Ive been in 300GT's andf Ive been in 300zx's and they don't have that smoothness. I think that if I ever upgrade my turbos it would be just tat, get bigger Twins and not go single. Twins are the way to go!

 

Bigger SEQUENTIAL twins? you mean like the BNR's (stage 2+3) or that monster twin kit rx7store sells? Yeah, I'm givin what you're sayin some thought because, right now I'd have to spend $$ to keep my seq's and to go non's I wouldnt.
There is something to be said (from a purist standpoint) of sticking with the original setup. 20 or so years from now at a Sevenstock are there going to be any seemingly stock 7's there?

 

No. Because turbo technology is past the requirement for sequential.

 

Ride in a single turbo FD that is set up well before you say this...

 

really? damn, I thought you guys would back me up, Ive never ridden in a single turbo fd so I guess Id have to try before I know. Is it that much better.

 

Well you can still get rx7s from the 70s that are completely stock, so Id have to say yeah there will definately always be stock 7s around, ALWAYS.

 

I think you would get most if not all the single turbo owners saying they would never go back to the twins.
Take a ride in a single turbo car and you will know what we mean

Jason

 

At the same time, at alot more of the older Rx7's were produced to begin with(in USA, at least). Plus its a generational thing. Modding those cars wasnt as IN back then as modding these cars is IN now.
Clayne makes a great point. Technology keeps moving, way beyond the "genius" of Hitachi twin turbos.
So Nemesis, the beauty of the FD is timeless, the technology isnt. More and more people are going to love the FD design, but as current cars get faster, smarter and more reliable, FD owners who actually DRIVE their cars will be more inclined to mod'em.

 

Good point I will have to agree that modding cars is definately in now and so is going faster than the other guy. Come on you know you dont want to lose.

So is single really THAT much better. Most people Ive heard say its not exactally for drivin around town but more for racing.

 

yeah it bases on the person, if your into dragging on the strip most use a single, but if your street driving it differs, its all about the lag, and many products have helped decrease turbo lag like wastegates etc. through the years, sequential was a great idea, but times change

 

i have a 95 with twins and a newly acquired 93 track car with a single ball apexi bearing turbo.... no that I have experienced both I would agree on both sides..

I do like the twins and for the street they are hard to beat with the very quick spool....but the single apexi is VERY close in feel, but with a lot more power potential and much less technical headache to maintain.

I have dealt with boost transition problems on my twins for a long time, yet I still try to solve them simply because I know what a healthy seq twin system feels like and I like it.

has turbo technology increased a lot since the introduction of the seq twin system, yes, ..... has it increased enough to give the same feel as the seq twins...not yet... thus the lingering attraction to the seq twin system

 

i saw your post for new to the FD forum and you were just posting about questions for mods but you are talking like you've been a member for years , have you been hittin that heh

 

I love the twins...one reason I bought the car (out of so many)...I do not race, hence street driving only - twins here are best
If I was to go track racing, I would give some serious though between moded twins (BNR etc.) vs. single however
Then again what about having twins and altering via a switch sequential vs. parrallel running
http://www.lighter.net/technical/nonseq.html


PS there are some things that keep in my mind the car original and some that alter its basic characteristics (of course, everyone is entitled to their own opinion on what these are)...for me stock looks, rotary engine and sequential turbo are the three dominant characteristics of the FD that should not be altered

 

A little off topic here but a friend with a Supra TT switched to a huge single 600hp. He hated it for street driving and sold it w/in 6 mos. Too much lag and then too freaking scary.

 

the problem with the sequential system is that you cant get a lot of horesepower out of the twins for long

if you could get 400rwhp sequenially out of twins and have them last for 40k miles id be there

single turbos may take a while to build full boost but even during that time you are waiting you're still moving real fast and you cant beat the power that singles make.

 

look at skylines and 300zx's for instance (even though they are not rotary). the GTR skyline models come with RB26DETT which are twin turbo charged. the TT version of 300zx come with VG30DETT which are twin turbo charged. unlike the supra's 2jz-gte, these two are true twin turbos, independent from each other. twin non-sequential is better than single. single is better than sequential twin turbo

 

All I'm sayin is just wait til your sequential system gets screwed and you're chasing a boost leak or doing the vacuum hose job, then come back and tell us how much you love your sequential twins.

 

Dude, most people will tell you a light flywheel is not for the street either. Most people are just keeping the same myths going and going and going. 8.5 lbs, and I wouldn't mind lighter (SF hills are the only place I would mind it).

Drive and/or ride in a single turbo car - especially one with a ball bearing turbo - you'll be dumping your twins.

 

Hey "efini" 7,

The 300ZX is using a V6 - that's why you have two seperate "twin" turbos. It is not better than a single turbo - it IS a single turbo, just two of them per intake manifold.

This system will STILL have CFM flow-rate compromises if the turbos are small enough for minimal lag and lag issues if the turbos are large enough to flow enough CFM required by both manifolds at higher levels of power.

 

Yeah new to the FD group, but ive done tons of research in the past 6 months, im not stupid, and although im new to the RX7, im not new to other cars

 

I wouldn't dream of going back to the twin turbos. I feel like my single turbo is more predictable and easier to handle now that im used to it. At first i will admit, i was a little scared to drive the car hard, but now its a piece of cake and a blast. If you are in the right gear while boosting i believe that the single will actually spool to full boost before the twins will if set at an equal boost setting. There is no better thing to have on the FD then a single turbo conversion. It really brings the rotary to life. Dont judge single turbos by people telling you they are laggy, they arent that bad (and i have the t78). Most people cant even tell the difference. Every one who has ridden in my car before the conversion and after the conversion love it so much more now.

 

D1Import: You're speading myths.

1. There is more to life than "dragging at the strip."

2. It's not "all about the lag."

3. Wastegate technology decreasing turbo lag? Take that one back to the drawing board.

4. Your name reminds me of someone who has watched Initial D and Option drift videos one too many times.

5. You're projecting your decisions on the car without even owning the car first.

6. You were born in 1987. Buy a Civic.

7. Have a nice day.

 

Twins have their place. They are great for the street, awesome at auto-x and can put down respectable numbers at the strip when pushed to the limits.
When I thought about upgrading for more power, I considered M2 ball-bearing twins, BNR, 99 Spec, A'PEXi RX6, and the GT35R.
I wanted a smooth predictable power band and more power then the stockers can provide.
I decided on the GT35R for minimal spool up, ease of replacement and cost.
I still have a bit to work on before the car is done, but I believe it will fit my needs well.
When you consider it, the twins are expensive to replace, a pain to maintain, retain heat in the engine bay, and generally make working on the car a PIA.

Bottom line, is use the best tool for the job. If you are happy with quick spool and 340-380 rwhp, then the twins are for you.
If you have other goals then you need something else.

 

glass, don't forget:

If you want your o-rings to take a daily beating, keep the seq manifold!

BTW: What else is left on your GT35 conversion to finish?

 

id kill myself before i drive a civic