N00b Turbo Question

[AndyD]

Ok i'll admit im a n00b with turbos i understand the basic principal of turbocharging but i get lost when we start talking compressor maps,efficiencies and air flow ratings the thing i want to ask is.

For arguments sake lets say i had a rb26 running a single 700hp turbo would it produce as much or more Kw than the same engine with 2x 350hp turbo's on it all other things being equal.

If the twins produced the same amount of power would it do it quicker than the single,due to having smaller area and wheels to turn.

On paper the way i look at it they both should put out the same amount being both able to flow 700hp or does it not work the way.

[djr81]

www.turbobygarrett.com will help with the noobism.

Beyond that 2x350=700 so yes they are equal.

I think the question you are trying to ask is "for an equivalent output will the twin turbo arrangement be more responsive in the mid range than the single?"

Which is actually a very difficult question to answer because it is so dependent on the turbos themselves.

The conventional wisdom is, however, that the answer is yes.

[AndyD]

www.turbobygarrett.com will help with the noobism.

Beyond that 2x350=700 so yes they are equal.

I think the question you are trying to ask is "for an equivalent output will the twin turbo arrangement be more responsive in the mid range than the single?"

Which is actually a very difficult question to answer because it is so dependent on the turbos themselves.

The conventional wisdom is, however, that the answer is yes.

Thanx for the response what i would like to know is would either set up make more totoal power obviously the twins would be more responsive i understand that part big turbo=lag but can it be compensated by having to smaller turbo's with the same flow rate make the same total power output

[djr81]

Thanx for the response what i would like to know is would either set up make more totoal power obviously the twins would be more responsive i understand that part big turbo=lag but can it be compensated by having to smaller turbo's with the same flow rate make the same total power output

Um well your initial assumption was both setups made the same power, so I am lost.

If you are asking is it possible to have (slightly) more power and better response/midrange when comparing one set up to another then yes. But again it depends a great deal on the engine, the turbo and the tune.

At the end of the day flow rate equals power - you get roughly 10 hp for every 1 lb/min of airflow. Boost is just a means of measuring how inefficient the air flow is.

[R31Nismoid]

Which is actually a very difficult question to answer because it is so dependent on the turbos themselves.

Great statement, sums it up really well

Plus the type, twin scroll, and all the other factors like whats goin on at the motor setup and so on.

[jeffworld2]

i think he means... if it adds up to 700hp, or is simply 700hp, it will flow enough air for roughly 700hp. but when you put it on the car, they rarely make exactly 700hp, so which one will be closer??

and the answer is... they both have enough flow potential for 700hp

[AndyD]

i think he means... if it adds up to 700hp, or is simply 700hp, it will flow enough air for roughly 700hp. but when you put it on the car, they rarely make exactly 700hp, so which one will be closer??

and the answer is... they both have enough flow potential for 700hp

Thankyou getting closer to the answer i am after will both setups make the same amount of power all else being equal in other words will be twins make the same power but just get there quicker is what i want to know

[jeffworld2]

they will both have the same peak power