Would this be a good turbo for a custom single setup? I can get it with or without the internal wastegate. I am just curious because I know on Honda's B16A2 it makes full boost at about 2500 to 3000 rpms, depending on the amount of boost you are trying to make. Says it is good for up to 350HP. I am looking for something ball bearing to keep down the lag. Thanks.

-Chris

GT28RS

Turbine Map



Compressor Map

 

Too small. Maybe for a 10A.
The smallest I'd go is GT30R.

 

That will choke up on you so fast because of the size. Just as a reference I have a 35r and with my porting I have 15psi by 3500 rpm.....
-Nic

 

Ok wow, good to know. I am looking definetely for a BB turbo to keep down on lag. I won't be running more than 12 PSI, I want quick response and good power for the 12 PSI, what turbo would you guys recommend?

 

I guess it's more important to know what type of horsepower you're shooting for... It's easy to say all you want is 12 psi but 12 psi on one turbo could be equivalent to 15 on another.
-Nic

 

Two of them would work nicely...

 

I would like 300 to the wheels. Nothing to insane or crazy, just decent power, reliability, and streetability.

 

Hmm, what motor/car? With an FD (13brew), using the stock twins gives greatest response and is still able to achieve 300rwhp... With an FC(13bt), and upgraded compressor-side and stock hotside should give the best trade off between response and your power goal.

 

This would be for an FD, I know the stock twins also have a fairly restrictive exhaust manifold, and can create a lot of heat. I don't really want any adverse affects from that.

 

True, but having such a small turbine housing (as the GT28RS does) would also create that heat and would also choke the top-end.

I've heard from several FD owners that the Apexi single kit offers spoolup almost as great as stock. Also, the GT35/40 supposedly spools about as quickly. Both have capability for almost 400rwhp.

 

Look, one GT28RS is way too small for a 13B.

For god's sake, they put them on 1.8l piston motors...

 

Apexi RX6 spools quicker than GT3540, it is also slightly smaller(as in inducer ---> less potential).

 

For what you want if you really want a single the rx6 or gt35r are your best choices and they give you room to grow.

 

Hell if all you want is 300rwhp you can EASILY do that with stock twins! I dyno'd 298rwhp with the following mods:
Apex'i twin intakes
Decent sized streetport
HKS DP
Racing Beat dual tip CB

Those were the only mods I had done. Stock injectors, IC, fuel pump, ECU! It's very very easy to pull 300rwhp out of an FD. That's something you might wanna look at. And with the stock twins being sequential you spool really fast as you already know.

Now if your heart is set on going single, I'd suggest the Apex'i RX6. That seems to be what you're shooting for. The GT35R would also be a great choice seeing as it has a little more potential for later on when you get rwhp hungry like the rest of us. Just my .02 though. Best of luck to you bro.

Zach

 

I think he had the added concern of the heat and the complexity of the stockers.... but I agree with you Zach.

 

Mine didn't have a problem with creating heat. Like I said, I was on stock boost with a stock radiator and had 0 heating problems. Granted everybody wants to be able to say that they have a single turbo FD, but with those whp goals, I just don't see the point in it. If nothing else send the twins off to BNR for a stage 2 rebuild. That will help with some of the heat concerns and give you fast spool up times. Or go with the stage 3 twins in non-sequential mode. Then you get more power with the same spool up as stock sequentials.

Zach

 

Sounds pretty good, I'll stick with the stockers for now. Just I have seen the affects of the heat on the stock manifold, including cracking etc. How long will a set of twins last at 300rwhp? Especially during road racing? Which is what I will be doing, HPDEs, etc.

 

Zach don't get me wrong I'm not disagreeing it just seemed he was set on a single.

 

That's what I thought as well. I just personally don't see the point in dropping $5K minimum for what you can do with stockers. I am in agreement with you though Broken09.

Zach

 

Well if I can do it with stockers than so be it, I will. Just wanted to make sure there will be no adverse effects during racing. Thanks.

 

That's why I suggested sending them off to BNR Supercars. That way they will be more reliable. Plus it's not very expensive for a stage 2 rebuild. That and a nice SMIC will net you all the power that you are wanting plus some if you so desire. Where in Nor Cal are you? I'll be moving to the Sacramento area this fall. We can hook up and discuss things when my fiancee(will be wife by then) get there if you'd like.

Zach

 

You have PM.

 

I still stick to my opinion on this matter though. But someone else mentioned something earlier in this thread that I meant to reitterate. The 28R would be WAY WAY too small for a rotary. If it spools that low on a honda engine then it would choke out shortly after that on a 13B-REW. I think you'd be surprised about how easy the rotary can spool a turbo compared to a piston engine. I'm not try to talk down to you by any means. That fact confused me for the longest time until someone sat me down and explained it all in detail.

Zach