Turbo Trivia

[Altiery54]

Took from another board..

If turbo A is X-size(any number), and Turbo B is Y-size(any number). Y-size being X% larger (any number) then turbo A.

if all things are kept equal(engine, boost, ect) what turbo with make more power, A or B?

and why? (specifically, dont just state "air flow" / where is the flow coming from?)

Click to read more...

 

[Yaj Yak]

shit gets pretty crazy with compressor maps and what not... regarding when turbos make their power- along with where they do it, and how long they do it for--- and also from what i have seen- a bigger turbo that spools quickly (working easily) is better than a smaller turbo that spools super quickly (working super hard)...

i may have just confused myself more than anything but ya

 

[Altiery54]

Nope

 

[mr.gto]

If turbo A is X-size(any number), and Turbo B is Y-size(any number). Y-size being X% larger (any number) then turbo A.

if all things are kept equal(engine, boost, ect) what turbo with make more power, A or B?

and why? (specifically, dont just state "air flow" / where is the flow coming from?)

what the hell chris this is like a crazy ass math question from the ACT

 

[Altiery54]

what the hell chris this is like a crazy ass math question from the ACT

Answer it then lol


90% sure a nitrous small block is in the works. We shall talk later and not whore this thread though

 

[mr.gto]

If turbo A is X-size(any number), and Turbo B is Y-size(any number). Y-size being X% larger (any number) then turbo A.

if all things are kept equal(engine, boost, ect) what turbo with make more power, A or B?

and why? (specifically, dont just state "air flow" / where is the flow coming from?)

Well it all depends on the size of motor and how big were talking the difference between the turbos but id say turbo B as long as its not huge because if the boost is kept the same then turbo B is a bigger turbo making a more efficient use of the power. Turbo A is smaller and may have a faster spool up time, but up in the top end ranges of the motor when the pressure starts to fall then it will tapper off. Kind of like the stock SRT-4 turbocharger.

 

[mr.gto]

Answer it then lol


90% sure a nitrous small block is in the works. We shall talk later and not whore this thread though

answered it how u like my answer?

 

[Altiery54]

Well it all depends on the size of motor and how big were talking the difference between the turbos but id say turbo B as long as its not huge because if the boost is kept the same then turbo B is a bigger turbo making a more efficient use of the power. Turbo A is smaller and may have a faster spool up time, but up in the top end ranges of the motor when the pressure starts to fall then it will tapper off. Kind of like the stock SRT-4 turbocharger.

Re-read first post. ASSUMING THE MOTORS ARE IDENTICAL! 1/3 of the answer is there which is efficiency

P.S. Size of motor doesn't matter

 

[Yaj Yak]

wait whyd you say no to me?

 

[Altiery54]

wait whyd you say no to me?

You're talking spool time........

 

[Yaj Yak]

unless u were referring to too big of a turbo- cuz yeah then it wouldnt be good..

but like for my car- i'd be willng to bet a t62 vs a t67- the 67 would make more power on the same boost/car/engine...

 

[Yaj Yak]

so are you just talking peak hp?

then a huge turbo will make the most peak hp.

 

[Altiery54]

unless u were referring to too big of a turbo- cuz yeah then it wouldnt be good..

but like for my car- i'd be willng to bet a t62 vs a t67- the 67 would make more power on the same boost/car/engine...

Why though?

 

[Altiery54]

so are you just talking peak hp?

then a huge turbo will make the most peak hp.

ok, then why would it?

 

[mr.gto]

Re-read first post. ASSUMING THE MOTORS ARE IDENTICAL! 1/3 of the answer is there which is efficiency

P.S. Size of motor doesn't matter

there really isnt much more to answer.... turbo B will make more power assuming everything is kept exactly the same. Because its able to make power through a bigger range and keep it climbing instead of dropping off to a certain point. It will actually do it with less PSI because it will take in more airflow from the air intake into a greater area. Thus having a slower spool up time but once the time has been met and the air goes from atmosphereic to press or "boost" the power will be greated at a lesser PSI....... even though that wasnt part of the ques

 

[Altiery54]

there really isnt much more to answer.... turbo B will make more power assuming everything is kept exactly the same. Because its able to make power through a bigger range and keep it climbing instead of dropping off to a certain point. It will actually do it with less PSI because it will take in more airflow from the air intake into a greater area. Thus having a slower spool up time but once the time has been met and the air goes from atmosphereic to press or "boost" the power will be greated at a lesser PSI....... even though that wasnt part of the ques

Still missing 2/3 of the answer

WHY does the larger turbo make more poweR?

You guys have 30 minutes before I post the answer so get searching

 

[Yaj Yak]

because the underhead flengulum is working more efficiently across the canooter valve duh

 

[mr.gto]

Still missing 2/3 of the answer

WHY does the larger turbo make more poweR?

You guys have 30 minutes before I post the answer so get searching

it creates a bigger displacment

Edit: a greater Volumentric displacement there ha! and I didnt have to search

 

[Altiery54]

it creates a bigger displacment

Same boost level though........... creating a bigger displacement would produce more boost, which skews the original question

 

[mr.gto]

Same boost level though...........

i know..... at the same boost level it will more effectivly put air into the motor...... the bigger turbo will be putting in more air at 8 psi than the smaller turbo at 8 psi..... there fore creating a greater displacement than the smaller turbo

 

[Altiery54]

i know..... at the same boost level it will more effectivly put air into the motor...... the bigger turbo will be putting in more air at 8 psi than the smaller turbo at 8 psi..... there fore creating a greater displacement than the smaller turbo

ok but WHY does it do that. What on the turbo contributes to it...........

 

[Runtz52]

u have a cobalt

/thread

 

[mr.gto]

ok but WHY does it do that. What on the turbo contributes to it...........

by the compressor wheel size

 

[Altiery54]

by the compressor wheel size

getting closer.......

The answer:

Larger turbo has a larger turbine, larger turbine has a larger exhaust side which means less restriction in exhaust = higher VE

and

vane spacing vs nozel pressure

the larger the wheel, the more distance between vanes, thus lower nozel pressure on the turbine.(back pressure)


Next question comming soon

 

[Yaj Yak]

think about like a motorcycle tire at 8 psi and a kids jumpy castle at 8psi...

both have the same pressure- but the kids jumpy castle has a shit ton more air in it.

aka volume