I'm sure this has been asked, and answered before, and I have no problem with someone directing me to a new thread, I did a search and virtually evey thread has the work "Turbo" in it somewhere and that gets me nowhere...

I'm facing retireing my Stock twins due to apex seal impact. I have a spare set, off the rolled vehicle that at last worked 100%...
The question is if I'm going to spend $800 for a rebuild of the stockers, or swapping out the '94 (Off The Wreck) wih the '93s... I might consider going single...

I'm not looking to drag race, I want manageable power at 14-18 Psi,bot something that doesn't come on untill 6K rpm, I want useable power, that is similar to the stock tubos, but I'm not happy with the stock vacuum problems and issues with the engine in general as it pretains to the sequential setup... I'd like to hear from people who have BNR setups, what kind of Octane fuel they use, how high they boost and what their experience is, as well as T04s Owners with some of the same questions... Also anybody with a setup that is less conventional and why you choose this...

(I also realize that somewhere around 400 HP I'll be spinning rubber rather than beeing able to use all that power... say if it wasn't for a traction controll system..)

Lastly what deciding factors made you choose, what you ended up with over the "other" choice...

Thanks,

-DC

 

Do a couple comparisons on twins with different turbos, I think you will see that the graphs that match the best are the apexi rx6 on properly running twins.

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

 

RX6b

 

another option would be upgraded twins. BNR stage 3s, for instance.

 

Yeah I'm hearing much more bad things about BNR's than good, which worries me.... I'd like to know how much more Boost (Psi) you can run on 91 Octane gas over stock... I hear the stockers are goot 'till about 14 PSI... and then it either melts them or gives you detonation problems or both...
(That's stock) what do the BNR's do to exceed those limitations !? Also I lost the link to BNR's site anybody have that !? Rx-7 Store seems to have taken down a bunch of the info regarding BNR's... also doesn't make me feel very confident...

-DC

 

Your not really going to be able to run much more than 1.0bar on an FD with any turbo on pump gas, at least I wouldn't really recommend it. The more boost means hotter air and more chance for detonation. There are several singles that will give you as good of response as the stock twins and a tad more power at 13-15psi. From what I have read the GT35/40 has about as good of response as BNR stage 3's. Or if your feeling like no lag, get a GT28/35 and do a custom kit, you should be able to make 320-370whp on pump gas with hardly any lag on a rotary.

 

Sorry I don't quite understand... No more than 1Bar = 14 PSI on any turbo with pump gas !??
I've seen plenty of people who run up to 20PSI on ump gas... the trick for them seems to be IC or WI or Both... And I do have a Large V-Mount IC that's going in at the same time....

Also I heard that BNR is going back and "Re Doing" their stage 3 design to solve the "hit or miss" success that they had untill now... ??? Anybody have any info on that !?

 

"I would suggest a few. Most of these will meet your criteria but only one will allow you to retain stock Smog equiptment the Apexi RX6. Its a Dual ball bearign turbo so it spools fast and makes good power. Near 400 at the wheels with very little lag. Also no boost issues from now on. I suggest like the others to limit boost to 15 psi and only if relevant fuel upgrades have been considered and well as cooling. The single turbo will remedy some off the turbo related heat but cooling the air charge and coolant would be wise. Fuel pump and Secondary inj will be needed as well as ECU. Power FC preferably for the simplicity. If you have any questions PM me. or IM me at "Mik3ymomo"

 

my rx6b kit is up for sale, if u want to see it go to the for sale section. its current bid is $2550 and it ends tonight, asking $2750 on ebay

 

I don't mean to hijack your thread but, does anyone know what the longevity of the RX6 is roughly? And what it cost's to get it rebuilt?

 

I believe it has been disscussed. Check out Archives with search feature.

 

I looked through the archives before the above post, and all I read were horror stories, bad tech support, difficulty finding parts/rebuild shop's, etc. etc.

From what I've read in the last two day's, two turbo kits have been dropped from my list. SR Motorsports stg. 2 and the Apex'i RX6a-b. I love this forum.

- Brian

 

Does pump gas mean what???

Stock injecters and pumps?

 

if u research a little more youll see that the main problems with the apexi kit was the wastegate and it wasnt a normal driving issue it was road race. The apexi wastegate issue has been fixed. As far as its reliability it is one of the best kits period, otherwise I wouldnt have selected it. The kit spools as fast as twins and can make serious power. The only downside is the the rebuild issues, but check out most people who have the rx6b kit or even the rx6a kit love it, and wouldnt change it

 

No! Thats stock fuel system!

Pump gas = the average (highest) octaine you could get from a gas station (92-93). Most believe that octaine rating isn't efficiant for higher boost levels (14psi & higher) because there is more of a chance for detenation to occur at that psi on "pump gas".

When someone is running high boost levels on "pump gas" we are always truely amazed that the engine survives. Also, most of our goals is to achieve the most hp we can get with "pump gas" without detenating. Why, because race gas is hard for most to come by and it's expensive.

 

I wouldn't say it's hard to come by t-von, but it is really expensive. You can always add Toulene or Soulene to your gas tank to stabilize the octane. Not exactly the most environmentally friendly option, but it works!

Back on topic though, I have heard great things about the Apex'i kit and it seems to be the closest single to have near twin performance and still be capable of producing nice power levels. I would surely scrap the wastegate that comes with it and pick up a Tial though. That would just be for piece of mind. I know for a fact that overall, Apex'i makes a wonderful product. Otherwise, they would've never made it as far as they have in the import performance world. Just my .02 though.

Zach

 

I say a T04E. Cheap, responsive, and can make 400RWHP on pump gas.

 

i do. . . if it involves the same kit that has been send to one certain person in murfreesboro, TN. ask yourself this question. . . "what do i want with an upgraded twin turbo setup?" most peoples answers will be more hp and ease of installation. the new stage 3s from BNR only fulfills one of those. more power. though the set that has recently been installed has yet to be dynoed, i expect it will produce a very healthy hp number. . . it better!!!!. . . cause the amount of custom fabrication it takes to install the "drop-in answer to going single turbo" is maddening. in order to keep all the mods you aquired while upgrading stockers you would have to make serious changes in the routing of intake plumbing as well as exhaust. these are things that most arent capable of doing in their garage. it takes a shop to do this. if BNR is going to sell the new stage 3's as a drop in kit. . . there needs to be considerable thought in the amount of modification involved with the installation of them. simply grinding a few places and tossing on filters wont cut it. . . a complete kit needs to be made.

i have been fortunate to see one of the first of the new stage 3s successfully installed. the car looks like a stock modified FD, but im sure it will perform well beyond that range. i have an xs to4e kit on my FD and i dont think ill be much of a match for the car that has the new stage 3s on it.

if anybody is interested in more info contact me via pm.

paul

 

I have the Apexi RX6A. Boost and response is somewhere between that of the sequential twins and parallel twins.

My problems have been minor with the wastegate.
I have one of the early models.

I think it is great for street use on pump gas.
I made over 400 RWHP on 89 octane.

 

My suggestion of the RX6 Apexi turbo is based on a few things, mainly on its a street legal turbo and meets your needs. If you want to stay away from it due to potential problems, I believe they have been addressed and fixed by Apexi. Other turbos you might want to consider but wont be smog legal are T04E, T04S, GT35/40, GT40R

 

Hello all. Haven't been on in a while.

The old BNR Stage 3's I haven't pushed in several months because of longevity issues. I have designed a replacement for the stage 3's, but it isn't out on the market yet. The new stage 3's are a totally different turbocharger assembly and comes with new cartridges with thicker shafts. With everything being new, parts are easier to get and also the design of the wheels are more efficient than that in the factory HT12 unit.

The Old stage 3's are not in production any more and haven't been produced since about 5 months ago. I still have a few sets of stage 3's out there that are still running excelent, but I want all my customers to be satisfied with what they get.

If you have any questions on what to do with your twins, feel free to email me @ BNRsupercars@aol.com.

Bryan
www.bnrsupercars.com

 

how would the 99 spec turbos compare to others at about 14 psi?

 

99 specs have a more efficient design, smaller even but flows more than 93+ design. Also more reliable. I suggest them and considered this upgrade vs going with a single turbo instead. The problem with the stock twins isnt always the turbos themselves but the control system. If the control system is the problem, the new 99 spec twins wont have any benefit over stocker 93-95 models.

 

Actually, HKS makes smog legal T04e and T04r kits that allow you to keep the airpump. I have the T04e kit and can't tell the difference in lag time from the stockers.