I haven't said you can't use it, but it works best at high boost. Sorry for my stupid post, i got the info from a garrett mechanic, but you sure know it better.

 

And he still is going on about it as if it has to be right because he heard it from garrett mechanic...

I think you should only post like this when you know for a fact yourself what your posting instead of listening to other people.

thewird

 

...look at the compressor map, as example for the GT3582R, and look at the pressure difference. You will see what i mean, hopefully...

Believe what you want, but the picture tells the story...

 

Maybe your the one who should have a good solid look at those compressor maps. Efficiency start dropping off after 20psi on a 35R...

thewird

 

???

...it tells me that the pressure ratio is Pi = 2 (don't know the correct english spelling for Pi, but for 2 its around 1 bar or 14.5 psi) and thats the lowest acceptable pressure.

Perhaps we look a bit different on these compression diagrams...

 

Taken from http://fc3spro.com/TECH/TURBO/compmap.html . Stop posting if you don't know what your talking about and pretending its 100% fact even after people tell you your wrong.



thewird

 

^^Thank you!!!! Geez... MetalCORE, I am not really sure what so-called garrett mechanic you spoke with but even then if you look at the correct maps you will see that the GT35r really begins to run out of breathe after 21-22psi... Efficiency drops at that boost to below70% which at the point you want to stop turning up the boost.... This is what spurned A-Spec into creating the 500r with does much better at higher boost. If you don't believe us here is a quote from the turbo gooroo Sean from a-spec himself that can be found in the a-spec vendor forum under 500r. "A-spec 500R
To the OP, I really think that it is in your best interest to stay with a TT setup. The BNR's are really pretty killer from everything that I have heard. From cost of going single to the simple fact that you live in CA... Despite what was said earlier about it not really being so expensive if you already have a lot of the suppourting mods... Well they are only about half correct. It is sure cheaper than starting from scratch,but there are numerous misc. expences that end up making the process cost more than even a good planner can anticipate from hoses, to fittings, heat wraps and other little things that you find when you get into it. Just look around in the single turbo forum and search for how much it costs to go single, even for those that already have most of the suppourting mods. Unfortuneately it is not that cheap. Easily over $5k and that is doing all the work except the tuning yourself. No, I don't mean you have to have the most expensive available option to put it all together, but really to do it right the first time and for it to be reliable it does cost a good chunk of change.

 

@oo7arkman: Thanks for this information, but i even can't believe he told me ****, 'cause he's also working on race cars... Besides, i haven't informed that much, i'm going single next year but i think i have understand to read a compressor map. So little mistakes are possible - this is human, i think. ;-)

@thewird: Thanks for the link, nice to know. But as there is said the box describes the center of efficiency plateau. Perhaps that was the difference, i was looking to another map where the pressiure ratio was really the limit with 2. :-)

 

Single All The Way!!!!!!

 

Sure, little mistakes are possible. But 10psi is not really what I would call a "little" mistake. No telling what mistake he made, but if he is working on race cars I hope this mistake was a rare one. Possibly he did not calculate correctly for the rotary. Does he normally work on piston engines? The single turbo is a fun setup IMO. 400-450rwhp is really more than enough in the FD, and it just makes it a blast to drive. Good luck with your future single conversion, but you may want to speak with a few other tuners before you commit to the conversion just to gain more knowledge.

 

if you want an idea of what the BNR TT systems are capable of check out goodfellafd3s's car and dyno video

 

agreed but remember he was non seq.. but there are reports of people breaking 400whp using the BNR's sequential still.. i think that be a dream machine if it were easy to do!