holy cow! its like a soap opera over there.I would like to ask a few questions about going single,but i dont want to put on a extra heavy flame suit!Search button is my friend.I am almost glad i am still using stock turbos,nobody gives a **** .

 

hehe. yes it is. got to love forum politics mixed in with some users who don't know what they are saying but repeat it often and loudly

 

well going single is good only if you are not driving the thing every day becouse if you do it becomes a hastle with some of the biger turbos that dont spook up until 4500rpm. As far as I am conserned I am planing on puting the 99spec turbos on mine they are good for about 350-375 whp and for my needs thats is more than plenty.

 

Coolvette,

I went single. pm me with what type of info your looking for and I'll try to help.

 

Just wondering why it would be a problem if you to drive on the street with a single turbo, are you planning to race everybody on the street that you need full boost right away, I have a TO4R and I get full boost at 4000 RPM and I dont have a problem driving it on the street, it actually saves me gas since I wont see much boost with regular driving. The single conversion that I did is the best mod I have done for the car, the only disadvantage is that I see is a lot more gas consumption, but that is only if you get on it a lot..

Funny how some people are so concerned in getting full boost by 2000 RPM, I have all the speed that I need even if I see full boost at 4000RPM and have no problems in a race even if it is light to light.

 

thanks books,i just like to improve my knowledge of single turbo setups ,and the total cost including parts and labor .

 

If you check the dyno site, you can get a good idea of power and spool up, which are trade offs. There are a few threads on what is needed and an approximate cost in the single section. What is lacking is info on turbo basics and decision criteria. When comparing spool make certain that each car is in the same gear and has the same porting.

If you are mildly competent with tools, I recommend you do it yourself.

 

the only reason why I say that single is not the best choice for a daily driver is I used to have 94 300ZX with a single turbo I remember driving it in trafic was a pain in the a$$ becouse it would have no power at all and then the boost would kick in and if I wasnt carefull I would find myself sideways or some s&$t like that. My dyno number were about 150whp until the boost and it made its way there slowly and wonce the boost comes on at 4300 it would jump to 360whp and by the time it hit 5000 it would be at 480whp and at 6500 redline it would be 540 or something like that if I can remember corectly. Since I wrecked the damn thing allmoust 3 years ago now.

 

single turbo on a 94 300zx ? never seen that one before.
I have a 90 300zx, aswell as my FD and belong to a Z car club and with my 10yrs of Z experience and research and car shows etc... I've never seen a single turbo '94 300zx.
I'd love to see your car.

 

I would NEVER install a single turbo on a daily driven car...the powerband simply sucks for that kind of use. Tracking the car? Yes (with a reasonably-sized turbo). Primarily using the car for showing off and racing people on the highway? Yes. Daily driving? No.

My mechanic removed his T-78 years ago and replaced it with 99-twins. Why? Because he drives his car semi-regularly and found it to be not as fun as a seq twin car.

If I lived in an emissions-free state, I would have most likely gone single with a GT 35/40 instead of the BNR Stage 3s. Why? Because I regularly track the car and it's now being retired from daily driver use. A single turbo system is much easier to keep reliable boost with than (sequential) twins. It also allows the car to run a bit cooler -- both good things for tracking the car.

In many cases, a single turbo conversion turns your car into TWO different vehicles -- below 3500 rpm, a Honda Accord V6, and above 3500 rpm, a screaming beast. There isn't much gray area between. Newer setups like A-Spec's GT35/40 spool quickly and still produce good power, creating a more drivable car.

A lot of people tout the single setup for one reason -- because they primarily use the car for showing off and racing people on the highway. Nothing wrong with that, but you should realize that fact before considering going single turbo. My new rebuild with the BNR Stage 3s feels strong so far and I'm getting good throttle response above 2500 rpm (about like stock car, as far as I can remember). I'm hoping to match the output of a small single while still passing emissions and having good power down to 2500 rpm. A wide powerband = a fun and usable powerband. We'll see.

Just my 2 cents, I know many will disagree.

 

Its not that we are testy. there’s just alot of the questions you are going to ask have been answered. We are more than happy to help with questions but answering the same one every other week gets annoying. (older guys more prevelant)

Single not daily drivable???????, Get out of town, if you drive a lot under 4k Rpm stay twins sequential. If you like to drive the car the way it was built to drive, go single and be 110% satisfied. If you like that 2k to 4k power band keep the twins, but if you like that feeling of knowing you have more power than god intended under your right foot, go single

 

I don't disagree. I think Rynberg did the right thing for overall performance, I guess now that you are tracking the car, you could have gone single, but I am a firm believer of the bigger twins for overall performance and still have fun on the street.

 

coolvette, i thought you're selling your car?

already change of mind and decided single turbo??

 

Go single and don't look back..
Best thing you can do to your car. Period.

If you can afford it.. do it.
Cost depends on what you have. But starting from a stock FD.
It will cost probably any where from 6-10K... Depending what
type/company parts you choose, and labor.

you'll have a 400+ RWHP @2700lbs Monster, smoking nearly everything.
including any modded twin set up.

If you are worried about zipping around light to light, corner to corner
like some ricer.. Sure stay with the twins. zipping around tring to win
the best out of 4 lights.. While I would just tach it 7K and drop the hammer.
ONE time, lay down the law.. Game would be over.

oh yea.. it'l make your 13brew 100x more reliable..
Less heat, no transition spikes, easier to control creep..

 

See, that same thing gets said whenever I point out the cons of going non-sequential. I never said it wasn't daily drivable, just a lot less fun.

I've been tracking the car for two years, LOL. I'm aware of the downfalls of the sequential system. I don't have my head in the sand like quite a few FD owners about their setup, whatever it may be.

Oh really? Rich and Stephen have both laid down over 400 rwhp at reasonable boost levels....sounds similar to what the vast majority of single-turbo cars are running.

Gee, I guess you enjoy accelerating like a V6 Honda Accord around town? It's called throttle response -- and I like to have it without having to cruise around at 3500+ rpm. It's nice, even on the open highway, to easily pass and zip around without REQUIRING a downshift.

Bullshit. Show me a single turboed car hitting 80-100k like a twin car. The only thing a single turbo is more reliable than the seq twins is boost response/consistency.


A lot of these statements in this thread are the same old tired crap. It seems like a lot of single-turbo guys have their heads in the sand. EVERY setup, whether it's seq twins, non-seq twins, upgraded twins, or single turbo, has its pros and cons. Intelligent and wise people realize this.

A single turbo gives you more consistent boost over seq twins and is easier to troubleshoot. A larger single has more power potential than upgraded twins. But the powerband is significantly narrower and, with larger singles especially, the powerband is also hard to control in anything but a straight line (and sometimes even then!). It's just plain ignorant to act like a single turbo is better than seq twins in EVERY way, because it's simply not true.

I should be making the power of a smaller-sized single, with a powerband from 2800-8000 rpm, with these BNR Stage 3s run sequentially. Yes, there are the normal seq twin cons, which I am very well aware of. It's all about how you drive the car and what you want out of the experience.

 

Oh really? Rich and Stephen have both laid down over 400 rwhp at reasonable boost levels....sounds similar to what the vast majority of single-turbo cars are running.


Pardon me if im mistaken.. But Rich and Stephen are running
Stage 3 BNR, NON Sequentially.. Granted their cars are powerful
and obviously fast.. BUT.... There are concerns with their longevity
running high boost on Twins... Vast Majority of Singleturbo's are
+ or - 400whp @ 15psi. Can twins do that?? sure they can but they
are getting towards their limits..

Remember on the singles.. Boost can be reached up to 20-30psi, and staying with in their effieciency range reaching upwards up to 600rwhp..

im not here to thump my chest and brag that I have a single set up.
Its just a natural progression.. the next level is being single turbo.
if you can afford it.. why not..??

 

I stuck with twins just because I use it in everyday traffic. I pretty much agree with Rynberg and his last post about the diff between the twin and singles. And just to give u an idea...I raced a modded single turbo 2nd gen just a few days ago....from 1st to about 3500 rpms in 3rd I was in front by about a full car. Of course he started pulling and blew by me by 4th gear. But with the right mods and a good tune I could have easily stayed with him or even beaten him. No boost lag and good power can do a lot. Dont get me wrong though a small single turbo would give u more power to work with but it depends on how much power u r looking for. My buddy has a TO4r single turbo rx7 that he drives daily and loves it. I think the last time he raced he did a 7.40 something at the track....1/8 mile by the way(still not fully tuned).

 

I can't wait to go single. (I have my 62-1 on my bench along with haltech e6x etc)

I did a turbo upgrade on a 10AE (low comp) and the spool time was comparable to the stock setup but boost control was awsome as well as power. It was a standard to4e. I was very impressed. With some tuning and timing i think it could be improved.

I never got the throttle pump maps completely worked out.

The car is so simple most ppl dont' think it will even run.

I'm on my second set of twins and just run them at 7psi for simplicity and boost control. I dont' want to go thru anohter set as they are an utter pain.

to each their own but I perfer single due to easy and a standalone....
- Love the standalone's

 

Hurry up and break in the car rynberg.. I believe Mazda made a wise decision with a sequential twin setup.. the 13b needs as much low end it can get. Even with my stock sequential twins I still crave more low end.. which is why the BNRs appeal to me. Do I want low end to race light to light? No. Would I like to be able to stay ahead of a minivan? Yes.

 

I thought I heard my name

I made ~390 rwhp at 15 psi, this on c16 race gas. Run 93 Octane instead and I was right at 400 at 15 psi. Re: longevity, these suckers arent even breathing hard at 15 psi......I recently beat on the car on a 95 degree humid day (about 6 highway pulls, 2nd through top of 4th gear) and my coolant temps stayed rock steady at 86 deg, intake temps went from 47 to 55. These BNRs should be good for about 19-20 psi. For a pump gas setup, they def have their advantages.

Also, Tyler, these 3s have similar power characteristics to a greddy T-78/turbonetics T-66, which isnt exactly a 'small' single turbo. Your car is going to be an absolute animal .

 

i drive my car every chance I get, and I have twin t04s (similar at least) turbos and a jerico dogbox transmission with a sintered iron clutch.

Stop being a bunch of sissys

btw on the street i run 10psi and make ~440 easily.

 

I just got back from a midnight run to put some more break-in miles on and bed-in the brake pads more fully. Rich, you are going to want to go back to sequential, LOL. As you most likely know, bedding in brake pads involves braking repeatedly from ~60-10 mph until they start to fade and then letting them completely cool off. Let's just say that those repeated runs up to 60 were extremely difficult....to restrain myself! Those BNRS were just CHOMPING at the bit to go -- just easing on the throttle at 2500 rpm was giving me 5-6 psi. I have a feeling this car is going to be a handful for me once everything is broken in and tuned...

Hah, everyone's version of "streetable" is different... In all seriousness, what kind of spool do you get on that setup? 440 rwhp at 10 psi? Yikes!

 

Im hoping for uncontrollable wheel spin in 1st WOT

 

^^so get some shitty tires..no need for a single turbo lol

 

I never really see seq-twin dyno pulls to 8k...usually because torque falls off before that.

GOOD LUCK with your set-up, do you plan to post dyno #'s?