turboe/super charger questions...

  • Thread starter Thread starter EnderDragoon
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EnderDragoon

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usually in the game it tells you why you cant race somewhere, buy something, or equip something. however when i got to the turbo charger section in the tune shops, it just give me a quick "RRRRRR". no reason why i cant get there, so my question is: is it the car that cant have the upgrades? or is it because i need to unlock my right to utalize turbo/super chargering?

im using the NSX-R '02 and ive got all the upgrades but the chargers, and i know for a fact that in real life NSX's get superchargers all the time, from a company called comptech, which i noticed is not in the tune shop list, but id still be surprised if they missed something like that

oh ya, and its not just my nsx, every car ived tried so far gets the "RRRR" noise....
 
Not sure, but some race cars surely can not be uprated can they, I dont think you can tune them?

Also, can all N/A cars have a turbo conversion and get supercharged....I dunno.
 
Drifteen
Is there a list of supercharge-able cars anywhere?
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Adding superchargers to this game was a great idea that was implemented very poorly. Supercharger in game add about as much hp as a stage 2 NA tune so the only reason to use it is if you cant add a turbo or a stage 3 NA tune.
 
Considering that all the RL possibilities and the limits of game design, this doesn't surprise me. I mean, I doubt GT will ever allow putting a Caddy Northwood V8 in a VW.
 
The only cars that i have that are supercharged (right now) is my Toyota Tacoma X-Runner and Pontiac GTO. From what I have seen, most cars are made to be turbocharged, with the exception of the hardcore American cars which are mainly made to be S/C.
 
I have a question about turbo charging as well.

Can you turbo a N/A tuned engine? Or can you tune an engine that is aleady turboed? I have a turboed car now and when I check to tune it it actually drops the HP down.
 
Truelize
I have a question about turbo charging as well.

Can you turbo a N/A tuned engine? Or can you tune an engine that is aleady turboed? I have a turboed car now and when I check to tune it it actually drops the HP down.
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NA tuning and Turbo tuning are not the same thing. If your car can EITHER have NA tune or Turbo tune, but not both. You might drop HP going from a stage 3 turbo to a stage 2 NA, but you loose the turbo lag and have more predictable power at the same time.

Anyway, you can buy turbo and NA tunes, and then go into the settings of the car and switch back and forth.
 
syclone538
Adding superchargers to this game was a great idea that was implemented very poorly.
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I agree. I think there should be stages of supercharging just as there are stages of turbocharging in the game.

Example:
Stage 1: Vortech Centrifugal Supercharger
Stage 2: Weiand 142/177 Supercharger
Stage 3: Weiand 6-71 Supercharger
Stage 4: Weiand 8-71 Supercharger
Stage 5: Funny car Supercharger
 
TurboJ
I take it he meant whether you can turbocharge N/A cars. That you obviously can do on most cars, but not all.
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Kinda. I'm asking more if I can tune my 3 stage turboed car. It shows that it will have a drop in HP if I do it. Would it have been better to N/A tune the car and then add turbo after? Or can you use both the N/A adjustments and the turbo at the same time anyway?
That's what I'm asking. Both at the same time????
 
YSSMAN
...................Toyota Tacoma X-Runner .....................
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so, there's more than just two trucks in this game? all i'd ever heard about where the Chevy SS concept truck and the Dodge Hemi ram. and the SSR of course.

so what other trucks are in the game? is the Ram SRT-10 in there?
 
wow, i'm amazed at how little the people playing this game seem to know about cars.

N/A = naturally aspirated... meaning, there is nothing forcing the air into the cylinders.

turbo/superchargers = forced induction, meaning - there is air being forced into the cylinders.

if you have a naturally aspirated car, it means that its not turboed or supercharged.

make sense?
 
In Gran Turismo games, they have completely separated N/A tuning and turbo tuning. In reality, you would, and should, do many N/A tuning things when you tune a turbo car. However, in the game, you can't combine the tuning methods.

One way to look at this though, is to assume that when you choose turbo tuning the necessery work is done to the engine internals and cylinder head as well. Even though many of the things you'd do would be actually the same or very similar to N/A tuning, they would separate turbo and N/A tuning.

I guess it would become too complex if every little detail was taken into account ( for example inlet tract lenght requirements' differeces between N/A and force-fed cars)

So, to answer the question about N/A tuning a turbo car in GT4, no, you can't do both. If you choose N/A tuning whatever stage, they'll take away the turbo system.
 
@veedubwill.....I'm pretty sure the issue here is why you can't add forced induction to certain cars when you can in real life or to other N/A cars in the game.
 
If you read what the NA tune does, a lot of it is increasing compression to gain HP. However with adding a turbo you need to lower compression. This is why you cant NA tune then Turbo on top of that. It doesnt say it, but Im sure that a Stg. II + turbo also means your lowering compression on your engine.

Its also a BIG BIG BIG, letdown you can't supercharge BMWs. Superchargers are pretty common upgrades for BMW enthusiasts.


TurboJ
In Gran Turismo games, they have completely separated N/A tuning and turbo tuning. In reality, you would, and should, do many N/A tuning things when you tune a turbo car. However, in the game, you can't combine the tuning methods.

One way to look at this though, is to assume that when you choose turbo tuning the necessery work is done to the engine internals and cylinder head as well. Even though many of the things you'd do would be actually the same or very similar to N/A tuning, they would separate turbo and N/A tuning.
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THANK YOU KEM!!!!!

Yes, Compression is the key to N/A tuning.

Most highly tuned N/A cars sport atleast a 11:1 compression ratio, sometimes 12:1 or even higher.

Most highly tuned turbo cars sport a 8:1 compression ratio, which is made up for by the boost.

obviously, cars that *upgrade* to a turbo are originally N/A, but once they go forced induction... the car is no longer naturally aspirated.

I figure that the lightening and balancing upgrade of the engine pretty much covers aftermarket valves, springs, retainers, pistons, rods, crank.... ect.

port and polish i would assume covers upgrading valve sizes and smoothing the surface of the ports.

compression (i am assuming) is pretty much the main thing for the N/A tune, since most everything else is covered in the other upgrades.
 
TurboJ
In Gran Turismo games, they have completely separated N/A tuning and turbo tuning. In reality, you would, and should, do many N/A tuning things when you tune a turbo car. However, in the game, you can't combine the tuning methods.

One way to look at this though, is to assume that when you choose turbo tuning the necessery work is done to the engine internals and cylinder head as well. Even though many of the things you'd do would be actually the same or very similar to N/A tuning, they would separate turbo and N/A tuning.

I guess it would become too complex if every little detail was taken into account ( for example inlet tract lenght requirements' differeces between N/A and force-fed cars)

So, to answer the question about N/A tuning a turbo car in GT4, no, you can't do both. If you choose N/A tuning whatever stage, they'll take away the turbo system.
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Thank you. That was a perfect answer to my question. I do understand cars fairly well. It's just that I thought I was able to tune a supercharged car in one of the other games. I must have been mistaken.
 
veedubwill
THANK YOU KEM!!!!!

Yes, Compression is the key to N/A tuning.

Most highly tuned N/A cars sport atleast a 11:1 compression ratio, sometimes 12:1 or even higher.

Most highly tuned turbo cars sport a 8:1 compression ratio, which is made up for by the boost.
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This all depends on the end goal is. I've run a 10:1 compression turbo setup running low boost (8 psi) and a Haltech E11 with great success for auto-x and drifting.

obviously, cars that *upgrade* to a turbo are originally N/A, but once they go forced induction... the car is no longer naturally aspirated.
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technically that is false, as it is not forced induction when the turbo is not making any boost.


port and polish i would assume covers upgrading valve sizes and smoothing the surface of the ports.
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I'm pissed that they didn't add any rotary support for GT4 :( Woulda been nice to bridge port the FC =)
 

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