On the reflash it is tuned very conservatively past 5000 rpms for safety concerns. Hopefully once I get it tuned with when turbonetics releases the 1.5 kit I can pull more top end power out of the car.

 

that makes more sense.

BTW, taurran......are you getting any boost spikes or creep? Do you have the extra pipes that TN now sends to control the boost creep?

 

how about them maximas with swapped 3.5s stock motor with single turbos trappin 130mph@mid 11's?

 

what single turbo kit are they running?

 

mardigras is running a built 3.5 and trapped 130. tilley is running a stock bottom end 3.5 with head work and cams and trapped 120 on his 11.5 pass, I think he might have trapped 122 on another pass though.

tilley is running his own custom setup with a T04R and a T3 .63A/R hot side, mardigras is running a modified (downpipe, etc) PFI setup with a T66 and a .82 A/R T4 hot side if i recall.

 

I am on the stock motor, of course I won't be trapping 130...

As far as the turbo selection on those, the reason why we haven't seen any huge ST #'s to date is no one here has done more than just swapping out the compressor wheel on the stock turbo (to my knowledge). Give it some time and we'll see ST Z's trapping 130.

Not to sound like a typical brown noser, or anything, but I think Alberto will be the first to do so...

 

Just found this old thread in my turbo research.

Why is your AFR over 16:1 past 3k rpm?!?





.

 

my old turbo kit .. he does me so proud

 

twins is the way to go on THE 350Z, on a different car, single might be better, but IMO after 2-3 years argueing, twins make the most power, ride in a TT car, then ride in a ST car stock block, night and day. ride in a built TT and ST night and **** day....

 

is it safe to say based on engine design twins for V6 and single for I6?

 

They both work. The only difference is that on opposing designed motors, one requires more piping than the other (inversely).

In reply to bo0o0stdz33's post, you should know that "making more power" has nothing to do with boost levels, but rather efficiency of the turbo(s). Twins do have a greater band of efficiency, so they're quite a bit more versatile and are less particular when it comes to turbo sizing. Single turbo setups are great and with a properly matched turbo you'll be making good power without much lag to speak of. The only issue is that the kit is far more sensitive to turbo sizing, and if you plan on building and running more power you're going to need to switch to a larger turbo.

If you want to make more power on a single turbo setup, turn up the boost a little and it's going to flow more cfm's. The only issue with this on a stock motor is that the ST kits on the market generally put down more torque than their tt counterparts, so stress on internals is greater.

Anyway, in the end I'm not going to say that the ST is "better", only that the TT is more "ideal". Both setups work, but the ST is a more economic choice for power levels that particular turbo can flow for. I'd say the main factor is how much money you're willing to spend on a setup and how far you wish to take it.

 

If you were not going to build your engine is it better to stick with a ST?

How much more lag does a ST have compared to a TT with stock internals and ~7psi?

I have never been a fan of ST but it may be a better choice for me given what I plan to do with this car as of now. With the market prices they way they are a TT kit will cost me ~$2500 more with install and both make about the same power on stock internals. I am looking for a fun street car, not a dyno queen or 1/4 mile monster.

 

What an old thread! Alberto was still single and had a blown motor! Damn

 

IMO yes, from all the cars i have seen, usually most are twin turbo on a V motor, and single turbo on a Inline, how does it work. I dont know

 

i would say that ST vs TT on a stock motor is personal preference. the single turbos have probably a little more lag that the twin kits, just because you have 2 turbos working off one engine, and the turbos are right on the individual manifolds, but i doubt its noticable to you while driving the car. my single starts making boost at 2700 rpms, lag isnt there at all. ive only ridden in one tt and it was sharifs so that doesnt count. my single does make good power, especially tq. i was just always worried about running twins on the stock vq motor. i know there were other factors that caused popped motors, but twins seemed to be more stressful to twins. thats why i went with the single on my stock motor.

 

seems like you went with your single pretty early too... when the majority of the twin problems wern't ironed out.. i mean who would have thought just changing a few things on a Greddy TT kit and it would be safe again

 

things like what?

 

getting rid of the e-manage for a better EMS (UTEC)
return fuel system for added security..

now you can run 400 whp on a Greddy TT setup without it blowing.. prior to that.. people were blowing motors on stock boost

 

Man im so glad to hear that. . I have a stage 1 CJM fuel return with stage 2 upgrade on its way, and Forged just mailed me out my UTEC friday
I might upgrade the injectors to 550cc not sure if that helps any. But i plan to build the motor so at least i will have brand new 440cc to sell.(dont wanna use the 440cc just to replace them a few months down the line)

 

That's also because they're usually making lower torque numbers. A problem with ST setups and longevity is that when you're pushing 400whp, you're usually putting down much higher torque numbers. For instance, on my setup I'm making roughly 420-430ft/lbs of tq at 9psi. On a TT setup with a stock motor people are generally pushing 450-470whp to get that kind of midrange torque. And, as we all know, torque is nice but it's hard on connecting rods.