im about to pull my motor and rebuild, mildish street port with ceramic coated rotors, housings (maybe) and seals. im looking to hit 400 to the wheels, and id like to do so under 18-20psi.

now, i like the wide power band and quick spool of the stock twins, and i know they are capable of that much power, but i also know they arent garunteed to last long that way.

im willing to reasonably (full boost by 3500-4000rpms would be nice) give up the wide power band and quick spool if it means longer life of my engine and turbo(s).

from reading all night i think that the XS t04s seems like a pretty good candidate for me, but i would like to hear some opinions and suggestions. i like the simplicity, from my understanding it should hit full boost somewhere around 4000rpms, and i like how it keeps the car a little cooler.

i was also considering the BNR stage 3's (sequentially) but how do the compare in price from start to finish against a single turbo (t04s)? in either setup i would like to do a v-mount, and of course all of the suporting mods to go with.

right now i daily drive the car, but a will soon be going to college full time, and most likely will only be driving it on the weekends. reguardless of college, i would still like to consider the car a daily driver. i dont track the car (yet), but it does see the top of fourth gear on almost a daily basis, and curvey roads just as often.

...i know its been talked about 101 times and ive searched and read for 4 hours strait, but i figure one more of these threads wont hurt...

thanks in advance!

 

I like my setup for the street, BNR third stage with the richman non-seq porting, and my pipe setup . Call Brian for turbo pricing 205-640-1193 .

 

Why run the BNR's non-sequentially instead of getting a correctly sized single? Was it just a cost saver, or some other reason?

 

I think it's done for simplicity. Not having to worry about a boost leak which could be caused by any number of vacuum hoses in the engine bay w/turbo run in sequential form.

 

r85 nuff said... 402whp at 16lbs on stock ports last time! this time is a nice solid chris rogers street port. i cant wait for the results

 

i went with a 67mm garrett. i love it

check out the GR67 kit from gotham

 

Fd aint no FD with out the twins baby!! i think if you want something thats just street the bnrs might be a good idea but the seq ones.

 

lol the fd is a pain in the *** with the twins... unless you love to play with vaccume lines an know what your doing its smart to go single. bnrs make some great power so do singles just because you have twins doesnt mean its a street car... all that aside just look at how much money you have cause if you go single you pretty much have to buy other parts. the pfc,dataloggit would be nice, fuel system is also i nice compliment! dont for get intercooler routing

 

^well either way im going to do full intercooler/radiator setup, PowerFC, full fuel upgrades, ignition upgrade, clutch upgrades, and brake upgrades.

the main reasons im leaning towards single instead of the BNR's are

to my understanding i could make 400ish without breaking a sweat with the t04s (and ported motor), and i would have to push the BNR's hard(er) to do the same. (someone correct me on this if im wrong)

and also it seems the BNR's are just as much as a pain in the butt as my twins.

the only thing that would make me choose the BNR's over single is the fact that its a daily driven car. does anyone have any opinions on this? is the low end (below 3k) really THAT bad to where its unbearable or uncontrolable? i know that some of support going single 110%, and some are 110% supporting twins, but besides that nonsence, how does it REALLY compare down low? not making full boost by 2k doesnt bother me, but 5k would.

 

i checked it out and i like it. more expensive than the t04s, but with the ball bearing option.

does it really hit 10psi by 3k rpms? is this true for both the ball bearing and non-ball bearing verions? they claim its the manifold that does the trick.

 

R85 is a fast spooling turbo being non bb and makes plenty of power for being a smaller compressor. Going single will reduce backpressure, reduce vaccum line headaches, and make the power more efficiently in the upper boost levels, talking volume of air. The only thing is it will take a while to get one.

 

how long is awhile? i think the r85 is my new choice.

 

Best bet is to call or email Keith at KGparts.com or Reactive Racing. If the wait is too long, then I would go with the turbo setup that Dave sinclair has, he made 430 whp or something like that at 16 psi...its a turbo setup that Ray at PFsupercars sells.

 

blitzed33 pm me your setup im curious on what you have with that r85... im hoping to jump into the 5's with my new motor and what not. just curious what you have done. i love my r85 and have only good things to say about it. also there was a guy trying to sell a brand new r85 kit in the 3rd gen section. im quite sure he never sold it! if you search for it you'll find it.

 

I'm no engineer but dumb this down for me. The intake is pressurised at say 14psi controlled by the wastegate and engine consumption. The velocity is controlled by the engine ability to let air in, therefore the only variable that can change is charge temp. So 14 psi should yield the same power at the same charge temp no matter what turbo is used, right?

 

The porting and exhaust make a difference as far as boost goes, you can still make 14 psi, but if the engine cant get the combustion gasses out due to a restricted exhaust, it wont make as much power. Your boost gauge will see 14 psi because its taking a reading off the intake. And there are more variables then just intake temps, for example, ignition advance, if you are running lets say race gas, then you want to start the flame more quickly due to the slower burn rate of the fuel, you want to burn that gas in the combustion chamber and not let it burn in the exhaust manifold that would yeild high EGT's, and vice versa with pump gas. Lets think of it another way,.....the stock twins boost 10-8-10 right

well, the first turbo is boosting at 10 psi....the second one comes on DOUBLING the volume of air but still only making 10 psi right and making MORE power. This is what I am getting at, the larger the turbo, the more volume its pushing at the same given boost.

 

You could always go with a T4 35R. I made 436 at 15psi with mine. You'd have 15psi by 3400-3600rpm.

 

I would go with either a Greddy T-78 or a Gt35r.

 

Negative. 14psi from one turbo is not the same as 14psi from another, differently sized turbo.

A small turbo (like the stock twins) at 14 psi wont move as much air as a larger turbo at 14psi. The difference is volume. A larger turbo putting out the same pressure as a small one will be more efficient due to it not having to work so hard to compress the air. That means the pressurized air will be at a lower temperature.

Think of it like a 1 lane highway compared to a 2 lane: on one, you can have 1 car travelling at 50mph at a time, on the other you can have 2. Same speed, more cars.

^^^ That is unless Im retarded and I have it all wrong ^^^

 

no you have it all correct! i have kids with gsr turbos around here that thing since they run 20lbs and i only run 15 that they will produce more power on there lil t3/t4 hybrid turbo... funny stuff i tell you