Hi guys;

Haven't posted in a while since I got my car tuned by Steve Kan in Belleville, IL 3 years ago.

Anyway, my stock turbo died and I'm undecided right now whether what upgrade I need to go. When it was tuned, I have a PFC, HKS Twin power, Blitz intercooler, HKS DP, Greddy CB, ACT Extreme clutch, Supra fuel pump, HKS Intake, efini y pipe, Unothodox pulleys, etc. I still have stock fuel rails and injectors. I don't bring it to the track. I just use it as daily driver if the weather is good.

I know the cost difference if I go single or BNR sequential. What is worth doing for my driving and resale value of the car?

Thanks.

 

You know it's completely up to you and no one can decide for you. . .for your use and assuming you don't need a 400+ rwhp car, the BNR stage 3 sequential setup is very nice. You'll probably want to upgrade your secondary injectors to 1200 or 1300. Are your stock turbos definitly dead? (the twins, actually more the supporting systems, can act up a lot without being dead)

 

It ultimately is up to what you want, Do you want to stick with the feel of the sequential twins or are you looking for higher horsepower numbers?

If you intend to keep DDing the car, i would suggest the BNR's at a reasonable boost limit. they seem to be highly reliable.

 

Single all the way the way the stock manifold is restrictive as hell.

 

If your gonna take the time to do all that work, just go single. Its so much simpler, and there are much fewer parts to go wrong. Pick up a used single kit off the forsale section, there are good deals all over the place. Just look for a small, quick spooling jobber and im sure you will never look back.

 

I like my BNR set up , two smaller units spool faster that one big one .I run them non seq with my Rich Mans non seq mod .I am planning to make a better main manifold after I get some other projects done.I plan on starting the paint work on the BMW K1 tomorrow .It has been sitting 6 years to be painted .

 

Yes, they're dead. Can get any boost, car stutters when I step on the gas but if I accelerate slowly without boost its smooth. I also hear some chaterring sound during startup and idling...thanks.

 

I would go single, its a simple setup, less stuff in engine bay. My T04R on stock ports spooled great very little lag, a lot of power, and if you want more power just grab a bigger turbo.

 

What's the downside of BNR non-sequential?

 

bnr!

 

downside.. is no instant boost like the sequentials give.. but still pretty quick spool from what i read.

 

lag

 

Thanks for all the replies. I've also search previous posts on this topic. Leaning towards the BNR stage 3 sequential per my driving applications.

 

+1. I have the early BNR 3's [in sequential] with a Pineapple large street port. This thing is great; boost response is right now, there's no transition lag and it has a V8 feel to the low end. No single is going to match this driveability, period.

 

i sooo want BNR's sequential setup around 17-18psi!! my dream setup!!

 

I don't know why someone just doesn't engineer a better manifold for the twins...

 

garco has been planning to.

 

well according to Brian full boost comes in at 3800 RPM, essentially no quicker than stockers. I had non-seq stockers and supposedly I had all the right mods to get minimal lag... not in my case 3800 RPM with lag.

Many people claim no lag, early boost yada yada. I didn't experience it just like many others on here. I had good working sequentials pior to my swap so maybe thats my problem meaning that I had something to compare lol.

 

Lets think for a moment.....Ok, Why would you get earlier boost with BNR's when it's using the same manifold but larger turbines?? In reality they probably boost a tad later.

 

^I think that makes sense. The BNRs have a larger wheel that can handle more boost. The spool up may be quicker than many single turbos, but a properly sized single turbo should spool fairly quick.

 

if you can direct me to a single that can do 400hp at the wheels on 93 octane and not be pushing it to its limits and do full boost at 3500 show me where it is! im not being pushy or anythign i just dont know.

 

GT35R

 

GT35R:

from what I read and depending on which manifold you go with, 10 lbs of boost can be hit as low as 3100 RPM.

I am expecting to hit 10 psi by 3300 RPM (short manifold)... I'll find out if it's true in a few weeks.

 

This is relevant to my interests. I've been muddling back and forth weather to go BNR's non-sequential (if garfinkle gets around to that custom mani), or gt35r. For me, i'm looking for response, reliability on behalf of simplicity, and 400rwhp @ high boost.

 

heh gt35r can really do that huh!! and if your ported it will just make the spool that much faster huh? maybe i was too quick to count out the single turbos then..