First off I want to say that I found an older thread about this and it got kinda out of hand. I in no way want to have a "this kit is better then this kit debate". All I want to ask is if anyone has a dyno overlay of a TT car and a ST car that are very close to the same WHP. I am curious to see the power differences at certain rpms.

 

Ive seen something like this in the past. TT makes slightly more TQ down low, ST makes more power and TQ midrange, I honestly forget how it ends up by redline.

 

lets see alberto, lets race!!!!

 

isnt alberto's baby dead?

how is he going to race or are u just rubbing it in?

 

cheap shot

 

if both systems are tuned thoroughly then the twin turbo will have more power/torque in the low, mid and high rpm range, that's a no brainer.

 

I'd say that depends on several other factors. Boost pressure, desired power delivery, desired boost threshold, etc. Theres a reason many Skyline and Supra owners switch to a large single turbo over two well sized twins..

 

At the same boost pressure a pair of smaller twins on the VQ engine will easily have the superior power/torque curve as a large single won't make peak boost until around 3800 - 4000 rpm.

 

Of course at the same boost pressure since there are TWO units flowing air as opposed to one. I'm not going to start the single vs twin war AGAIN in this thread. I'll say it again, theres a reason many high hp cars switch to a large single over twins...

 

Lower cost would be the only real reason.............all serious performance cars with V engines have twin turbos not single turbos.

 

Supras and skylines are also inline..ST is far more efficient for them anyway. For V style engines, i dont see a specific advantage over TT.

 

But the cars you mention are inline 6. It is better for that type of engine but there are still big hp tt skylines and supras.


edit: some one beat me to it

 

Those are also both inline 6 motors.

 

Fight Fight

 

yeah I'd think that with 2 banks on the engine a pro high hp race car you'd rather have 2 big turbos instead of 1 big turbo.. Then each bank has it's own intake, turbo, exhaust manifold, and exhaust piping

for the TT kits on the Z, because the turbos are slightly smaller than on the ST kits, they simply spool up faster and ultimately give you more high hp potential than any of the ST kits - unless you upgrade the blower on the ST kits or something

 

I have one of these, but it might rub some people the wrong way if I post it. You can PM me if you're really interested...


It has a lot to do with the tuning and boost control, but BOTH setups are very capable of putting down power where you want it. Besides, once you go for huge power, you will have lag with the TT's anyway, as you're now pushing each [upgraded] turbo with only 3 cylinders each, wheras with a single you're pushing the turbo with all 6... so go figure.

And to the above post, it's real funny that he says you won't make peak boost until 3800-4000 rpms. I'm pretty sure my ST setup (and other brands) are making full boost WELL before that.

 

I can understansd when you say once you go for huge power you will get lag with TT too, but, also also understand that for a TT setup to achieve the same power as an ST, it will only need smaller turbos to achieve the same air flow. And of course this translates to quicker spool up. If you are going for a set power goal, the TT will spool up faster, but yes, if you stick to turbos the same size as a single turbo, it will spool up a lot slower, but it will achieve a much higher flow rate, and hence much greater power.

 

Yeah man look at all that lag Im getting, Im only making 400TQ at 2500rpms and 560Tq at 3800rpms, then it holds 540tq till reline

I would much rather have a big single so I can make 200TQ till 5000rpms then 800whp from 5000rpms to 6000 rpms..

 

Big Single Turbo Dyno's FTW


I just love seeing 900 hp Supra's that build power at 6000 rpms when redline is 7000 rpms

 

With dynojet simulated/corrected #'s we can all make that power