Turbo's?

[phil_75]

What is the point in low and medium rpm turbo's, only high rpm is used when racing?

Am I missing something?

 

[Secretone]

Low HP cars can't really get off the line with a big turbo.
The small ones are good for small cars on small tracks with a lot of corners, so they can get out of the corners faster.
That said, i pretty much always use the high RPM turbo's anyways.. That extra push in the late acceleration is worth more.

 

[phil_75]

But you are never less than about 5500rpm, even starts are full revs?

 

[GT_Fanatic69]

Low and medium turbo’s work well in lower to medium power cars. Exhaust gases from the cylinders spin the turbine inside the turbo. The turbine powers a compressor. The compressor feeds high pressured air back into the cylinders. The more pressure, the more air, the more air, the more petrol… you know the rest.

Now if a lower powered car doesn’t produce as much exhaust gas as a high powered car and has a monster turbo bolted to it, then you get a lot of lag. It doesn’t spin the turbine as much which won’t power the compressor to pressurize the air. That’s where a “low” or “medium” turbo works better.
GT5 doesn’t portray the workings of a turbo as good as it could. So most just bolt on stage 3 and go nuts.

 

[KingSakery]

It is usefull at Tracks that are short and twisty (many slow corners).
Cote d´Azur (Monaco) for example a high RPM turbo would cause a big lag followed by a big sudden punch, but with a low/medium Turbo it is better because you accelerate better out of corners.
You can be in a higher gear => eventually less wheelspin (but lower rpm´s => in turbo-range)

Some Cars have more hp/bhp/kw with the Medium Turbo for example the Samba Bus

 

[niky]

Low RPM turbos almost never make sense, but Mid RPM turbos can be useful in an HP limited series.

 

[phil_75]

Thanks for info everyone, I would agree that low rpm turbo is completey useless apart from Jay leno's tank car if that can have a turbo?!

 

[oopssorryy]

Like others have said, some cars suffer greatly from turbo lag, while others don't. That and some times the power band is better with the mid turbo.

The only way the low turbo would make sense is if PD actually let us sequential turbo charge twin turbo motors. That and let us control the boost pressure....

 

[iamjajo]

I think part of the reason was, pre-engine power limiter racing.

You could swap out parts on your car to get it down to the HP limit for a race.

Same thing could be said for the different intakes and exhausts.

 

[GTP_Plato]

I find after you have installed all turbos, going back to the medium range turbo seems to be better. I noticed when swapping my high range turbo for the medium one you seem to have a few extra torque, and the cars cornering speeds seem to be better then when you are using a high range turbo. For tracks with long straights though, the high range turbo is the better choice

 

[caninehostile]

I find after you have installed all turbos, going back to the medium range turbo seems to be better. I noticed when swapping my high range turbo for the medium one you seem to have a few extra torque, and the cars cornering speeds seem to be better then when you are using a high range turbo. For tracks with long straights though, the high range turbo is the better choice

Very true, f.example toyota 7 race car (The nostalgic races)
Definatly need NOT high turbo, but the Mid turbo

EDIT: Off topic Just bought 750 autoparts. My right THUMB is mad at me now!

 

[Highlandor]

Depends on the car and the track. Also, there's nothing wrong with the lesser RPM kits, aslong as you change the gear ratios and shift gears accordingly.

If you're keeping the car in the power band, it doesn't make a difference whether it's 10,000rpm or 4,000rpm - the power band is the powerband.

Cars like the RX8 have poor torque compared to some of it's rivals, also, as mentioned by Niky, the regulations of the race you're in might mean lesser RPM kits are actually more benificial.

I race in a 530pp event, no power limiter use is allowed. Some GT300 cars (with adjusted aero) fit very nicely into this catergory with a mid RPM turbo kit. It's the power that affects the PP not the torque, you end up with the same power but far more torque.

Another example is the R34 GTR V-spec, I also race in a series for 522bhp /1200kgs cars (again, no use of power limiter or ballast is allowed). Put a mid RPM kit on the R34 and the torque it generates is monstrous. You just need to amend your gearing and shifts so you keep the revs where the best power and torque is.

The RX8, as mentioned, has poor torque when tuned, try addding a mid RPM kit to it, it helps. Other high revving cars with poor or uncompetitive torque firgures / curves can also benefit from the lesser kits too.

Don't write off the lesser kits, certain cars on certain tracks they can be very effective.

 

[phil_75]

Still no reason for a low rpm turbo then really?

 

[TT3AZ]

Depends on the car and the track. Also, there's nothing wrong with the lesser RPM kits, aslong as you change the gear ratios and shift gears accordingly.

If you're keeping the car in the power band, it doesn't make a difference whether it's 10,000rpm or 4,000rpm - the power band is the powerband.

Cars like the RX8 have poor torque compared to some of it's rivals, also, as mentioned by Niky, the regulations of the race you're in might mean lesser RPM kits are actually more benificial.

I race in a 530pp event, no power limiter use is allowed. Some GT300 cars (with adjusted aero) fit very nicely into this catergory with a mid RPM turbo kit. It's the power that affects the PP not the torque, you end up with the same power but far more torque.

Another example is the R34 GTR V-spec, I also race in a series for 522bhp /1200kgs cars (again, no use of power limiter or ballast is allowed). Put a mid RPM kit on the R34 and the torque it generates is monstrous. You just need to amend your gearing and shifts so you keep the revs where the best power and torque is.

The RX8, as mentioned, has poor torque when tuned, try addding a mid RPM kit to it, it helps. Other high revving cars with poor or uncompetitive torque firgures / curves can also benefit from the lesser kits too.

Don't write off the lesser kits, certain cars on certain tracks they can be very effective.

This is important stuff there, "You just need to amend your gearing and shifts so you keep the revs where the best power and torque is." - True, if you shift to early the rpm will drop to much.

 

[audirs]

What is the point in low and medium rpm turbo's, only high rpm is used when racing?


Am I missing something?

I do not see a reason for low unless the car has traction issues

But you are never less than about 5500rpm, even starts are full revs?

Not all cars rev to 9k rpms. Some rev to only 7k and my 908 is something like 5200rpms.

It is usefull at Tracks that are short and twisty (many slow corners).
Cote d´Azur (Monaco) for example a high RPM turbo would cause a big lag followed by a big sudden punch, but with a low/medium Turbo it is better because you accelerate better out of corners.
You can be in a higher gear => eventually less wheelspin (but lower rpm´s => in turbo-range)

Some Cars have more hp/bhp/kw with the Medium Turbo for example the Samba Bus

You can cure turbo lag with proper gearing

Low RPM turbos almost never make sense, but Mid RPM turbos can be useful in an HP limited series.

Or to use the most of the power in a car

Like others have said, some cars suffer greatly from turbo lag, while others don't. That and some times the power band is better with the mid turbo.

The only way the low turbo would make sense is if PD actually let us sequential turbo charge twin turbo motors. That and let us control the boost pressure....

I wonder why we cant control boost. Then again, the people with American cars will complain with their N/A cars.

Depends on the car and the track. Also, there's nothing wrong with the lesser RPM kits, aslong as you change the gear ratios and shift gears accordingly.

If you're keeping the car in the power band, it doesn't make a difference whether it's 10,000rpm or 4,000rpm - the power band is the powerband.

Cars like the RX8 have poor torque compared to some of it's rivals, also, as mentioned by Niky, the regulations of the race you're in might mean lesser RPM kits are actually more benificial.

I race in a 530pp event, no power limiter use is allowed. Some GT300 cars (with adjusted aero) fit very nicely into this catergory with a mid RPM turbo kit. It's the power that affects the PP not the torque, you end up with the same power but far more torque.

Another example is the R34 GTR V-spec, I also race in a series for 522bhp /1200kgs cars (again, no use of power limiter or ballast is allowed). Put a mid RPM kit on the R34 and the torque it generates is monstrous. You just need to amend your gearing and shifts so you keep the revs where the best power and torque is.

The RX8, as mentioned, has poor torque when tuned, try addding a mid RPM kit to it, it helps. Other high revving cars with poor or uncompetitive torque firgures / curves can also benefit from the lesser kits too.

Don't write off the lesser kits, certain cars on certain tracks they can be very effective.

+1

Still no reason for a low rpm turbo then really?

yes unfortunately

This is important stuff there, "You just need to amend your gearing and shifts so you keep the revs where the best power and torque is." - True, if you shift to early the rpm will drop to much.

thats a given

 

[Duman079]

Medium turbo is VERY usefull in drifting if you want to link short/medium long parts. For longer parts use a High RPM turbo.

And for low HP cars, High RPM turbos are an insane lag sometimes and thats frustrating. I had that on my Civic. I still have it on my Civic, I lowered the top speed and its better now.

 

[PapaGnr]

Low to medium turbos work a lot better on Rally events as well, especially where there are a lot of sharp, low speed corners.

 

[phil_75]

Low to medium turbos work a lot better on Rally events as well, especially where there are a lot of sharp, low speed corners.

But you're never at 1 - 3000rpm (approx) for it to work! (Low rpm turbo)

 

[wardyk99]

Noticed the other day that the RM'd Impreza makes a few extra bhp with a midrange turbo over the higher one. Its like driving a different car. Couldnt get used to it and had to switch back to the norm.

 

[freedomweasel]

I wonder why we cant control boost. Then again, the people with American cars will complain with their N/A cars.

Huh?


In addition to everything else, you're not always allowed more horsepower, so smaller turbos may be better as they simply won't give you as much power.

 

[shoeface33]

cannot remember which car but one actually has higher bhp with the medium turbo than the high one. also as someone said, before they were used for editing horsepower. if its a car that i know i will want to race online and have lots of tunign variety then il buy all 3 turbos because i prefer to do mod reductions etc than just turn the engine power down (coz i usually forget i have then always use an underpowered car XD )

 

[oopssorryy]

Some cars don't push enough exhuast out to take full use of the High RPM Turbo, so in some cases the Mid Turbo will get you more power.

 

[iamjajo]

The Volkswagen Samba Bus indicates higher HP with a medium turbo than with a high RPM turbo.

But it's not true.

 

[ALMSDriver]

I just dealt with this question today!I was putting a tune on my '64 Ginetta G4 and noticed that it actually gave more horsepower with the mid-range turbo than with the high rpm unit....very interesting situation.Now I have a car that weighs in at about 475 kilos and puts out 277hp.......damn little rocket!