donny

Need new turbos. Should I go with 99twins or something fast spooling, like an Apexi kit?

93BlackFD

not 99 twins

SVT Squasher

Fast spooling like a single. Is there a fast spooling single? I dont think any single can spool as fast as the seq.. If you want fast spool stay with the seq. if you want high hp (400+) go with a single (4500 rpm for max boost).

donny

I had the Apexi kit on my 94 Fd and it spooled every bit as fast as the twins. I couldnt tell a difference at all.
Cost is the main issue this time around.

ZoomZoom

iTrader: (2)

If cost is a factor go with Twins. Otherwise Single is always the best way

donny

How do you like your GT35/40?

wile_e_coyote

how much do those apexi singles go for? I want fast lag and latency like my stock sequentials, but I want simplicity of single turbo. I also want as cheap as possible because I'm cheesy like that. hehe

CCarlisi

3540. not all singles are created equal. I was totally against going single until I rode in Ihor's car with the 3540. The spool time is not much different from the stock twins and once it's going there are no spikes, lumps or dips in the powercurve and it pulls a lot harder. At our recent tuning dyno day I was amazed at how effortlessly the two 3540 cars made over 300hp and how much nicer their grah plots were.

If you take the time to shop around for the parts individually you should be able to put together a 3540 kit for about 3k.

racer1

Single is the way unless you've got money problem.

artguy

then your stock setup was fukked up.

artguy

great turbo....but not much different...lol...show me a dyno plot on that setup with spoolup numbers down low like the twins. sorry...aint happening.

if you dont mind lag...go single...its simpler...easier...and will smoke just about anything on the highway.

if you live in the city...beware.

send a pm to wargasm to have him pass you the link to his dyno sheet site. compare the charts. look at the power down low on the stockers vs the 99s vs the m2's vs the rx6 vs the gt3540. compare the powerband. if you like to drive a certain way, pick a turbo setup that will accomodate your style.

the rx6 is booty expensive. the gt35 kit smokes it on the top end. why go rx6 when you can get nearly the same peak power with the m2 set or the 99s and good tuning....and have even better low end response.

you might push 430 on an rx6 with lots o tuning...most with them are pushing around 360-400 from the dyno sheets i have seen.


j

DSMguywantsFD

whats the most hp made on the 99 specs and m2s right now(sequential)? and how fast do they spool(also sequential)? those dynos didnt seem like they are competing with the singles at all in terms of top end(even the rx6)

Larz

Not as much as a good single.

Herblenny

iTrader: (13)

I would stick with twin.. I can't deal with lag time.. Currently I'm experiencing some turbo issue and my car goes into non-seq mode..

Anyhow, I have seen people make 370-380 with Stock twins or 99's.. Some are 10 year old twins..

Fd3BOOST

iTrader: (7)

I have had 99 twins for about two years now. I am going with a t78 in the Spring. I obviously dont mind lag.

Get a single you 'll be happier IMO.

SNracing

what about the BNR stage 1, 2, or 3?

or this... http://66.216.67.51/product.asp?0=220&1=362&3=720 ...if i had the money, this is what id get

FD_Newb_1974

Donny,

Are you talking about the car you completed restored with the 1999 conversion?

This may be a simplistic way to look at it, but Mazda produced the car with twin turbos for a reason. In my opinion, you should keep the car with twins for the true spirit of the RX-7.

Not only do we get great performance, but incredible low end. It's easy to get in a pissing contest with other owners. However, it's pointless. Someone will always be faster.

What are your goals with the car? Judging from your restore, I would suggest going twins. If your end goal is to get the most high end HP for racing, and money isn't a concern..go single. I just get the feeling this isn't what you are trying to accomplish.

Food for thought....

Garrett

I really like my single set-up. It took me all but a day to get used to the spool up.

Just be sure you have sufficient oil coolers/radiator to keep your oil/water temps stable when getting a single. That is one issue I have to address now (oil coolers). That iddy biddy stock oil cooler just isn't enough to keep a single cool.

A lot of people get rid of twins to be rid of heat in the engine bay and the engine itself. From my experience I have had more heat generated because that one big turbo really heats up our cooling system more. I have much harder temps to maintain than I had with the stock turbos, even within the engine bay. Good thing I still believe in Santa C. He'll be buying RE 25 row twin oil coolers for me this Xmas.

Garrett

artguy

both sets are capable of 400rwhp..which is pretty damn fast for the street. As soon as my car gets down here I am sending it off to kan and the gotham boys for one final round of tuning. My car is still rich with conservative timing up top. you can see it in the choppiness of my sheets.


around town...there isnt a single that can touch the sequential upgrades on a tuned fd. sure I would get roasted by any of the tuned t78 guys or gt3540 guys out on the highway....i dont drive on the highway that much though. Im a ghetto racer. hehe

if i was to go single id go with the gt3540 for sure. it all comes down to how you like to drive your car. as stated a hundred times....its not the top end numbers its the area under the curve and whether or not that area fits your driving style.


j

felix_is_alive

whats wrong with you people dont send the boy to his doom .....single single ...more power ..more durabillity ..looks better less complex generates less heat ....get a good 60-1 on that thing ...spools up fast and hard solid response and with proper tuning it can crunch those numbers youlle be so damn happy youll`e pee youre pants

911GT2

If money is an issue with a single, but you like simplicity, get non-seq twins. Spool up a little later than a single, but cheap, and reliable. Plus then you get to keep the twins

r0t0r-rooter

http://www.catenet.net/dyno.php

btw, Tim Benton made ~ 362 hp @ 14.22 (i think) and was going to go for 16-17 psi, BUT i don't see the twins lasting very long at that range; new & improved turbos or not.

I have the 99-specs, & like them because I didn't have an i/c, ecu, injectors, etc all lined up waiting to go in. The ease of "drop-in" was what sold me on them.
Truth be told, if $$ was no object i'd probably have gone single instead.

rynberg

Bingo. I notice that few single guys are trapping as high as Boost'n 7 on his stock twins or as high as Stephen (Spoautos) on his BNR Stage 3s...

felix_is_alive

btw, Tim Benton made ~ 362 hp @ 14.22 (i think) and was going to go for 16-17 psi, BUT i don't see the twins lasting very long at that range; new & improved turbos or not.

yes yes yes it just wont last why waste time and money when youre gonna have to get the single anyways

artguy

non seq blows. (except on the bnrs) I should have raced you while I was on the east coast. that way i could have given you a good illustration of how laggy your car really is.




j