lol i live in brisbane and drive passed about 6 sign's advatising it and think to my self hmmm i need the money they spent on them stupid cars

Quote from sam93 :

So say I got a Z20LET (200bhp stock) and done either one of these two to it.

1. Smaller turbo and a bigger turbo. What would be the final amount of bhp achieved?

2. Supercharger and a turbo. Again, what would be the final amount of bhp achieved?

lol i see these quotes all the time on car forums and the awenser is allways the same

the HP limit comes down to how much you want to spend that simple

im sure with enough money you could get a 1.6 4cly with 2000 HP but would only last a few runs and would cost in excess of 200,000$

Quote from skstibi :

Guess what. Ever think that the brake booster may be hydraulic? Besides, I have never heard of any problems with boosted cars having brake problems, if you do then you have that vac line hooked up to the wrong place pal.

A lot of cars have Hydraulic boosters now days. Never seen an electric booster though.

lol u oviously havent driven many superchagred/turbo'ed cars mate :P

im not talking about holding positive pressure for 10/20 even 70 seconds affecting it that badly that u cant brake. every turboed car i have driven if you hold positive pressure for about 40/60 seconds you can JUST feel a slightly harder pedal but if you trail brake and never let the car get vacume the brake booster lose's pressure due to braking and by the next corner you barely have any vacume left to assit in your braking.

lol hows that i was mainly responding to this


A v8 will make the most power on a turbo setup, but it would be more peaky than a supercharger and thats one reason why you see more V8's blown than turbo'ed.



as im yet to see a turbo'ed v8 make more then 2800 HP

lol u oviously havent seen topfuel dragsters in action mate


the fasted turbo record atm isent even held by a v8 its held by a turbo 2jz in a camry i beleave 6.67 and the next fastest is a SR20DET with 6.87 . im yet to see a V8TT run a 6 low 7's yes but the supercharged V8's are now running mid 4's


btw the 60ish psi i was talking about is on around 15.1 / 17.1 compression on methanol + nitromethan (spelling)


we have alot of centrfugil charged cars in australia making 600+ hp on inline 6's and v8's but i agree i would rather a roots blower on a V8

yer it like i said u the game cant change the brake pressure of our pedals but yer it was only a small susjestion and not very important atm

and i beleave most turboed race cars have a one way solnoid setup to stop this from happening to the extent road cars do it

lol u musent know what a centrufigle and vortex superchager is they dont even attach any bolts to a head the ones your thinking of are tunnel ram superchagers like the 671 :P

and for outright power nothing beats a superchaged V8

personaly id rather have a TT V8 for a useable car

oh and some superchagers run at 60+ psi

one of my mates made his RB30E into a RB30 supercharged+turbo'ed the supercharger was on 6psi and turbo on 4psi and made 370hp at the wheels. he used a side mount vortex supercharger and a GT35/40 with 1.06 rear ar and it seem's to work fine for him as he put the superchager just befor the turbo to help spool it.

im sure he could make a SHITLOAD more power but it took him like 1 year just seting it up properly and tuned right

for those that dont know what a RB30 engine is its out of the old skylines pre 1990



in reguards to this


(In theory turbo's are 'limitless' but engines can handle so much and for a factory engine you would be lucky to get past 300BHP with an aftermarket turbo before having to change out internal parts. A lucky few engines can go past 400BHP before the engine becomes a ticking timebomb. )

have u ever heard of a RB26 or 2JZ ????

and you dont allways need more compression for more power :P lower compression and more boost + Water meth is the way to go

ok i am awear that this susjestion is not very important but a valid one at that. In most forced induction cars positive boost dosent allow the vacume brake systems to work corectly and you lose braking by a small ammount,eg more time on positive boost = less vacume = less braking assitance.

Now im well awear lfs can not make the OUR pedals harder or softer but they can make it not brake as hard when poisitve pressure is held for long periods of time

PS. i just enjoy seeing how bad the vacume assited braking is in differnt turbo'ed cars IRL

Quote from vl_turbo :

whats the matter dingo get ya baby! OI OI OI!!!!

lol give me ur turbo u dam roo fuker


ps www.calaisturbo.com.au ?

i was considering riding my old school GT powerlite to work to get fit but didnt really think i could manage riding 74k's at this age :P 74k 1 way and return anthor 74

Quote from Exile R :

so what they said was true? WELCOME AUSSIES! there a great bunch of guys on servers, quite funny too, just um.. short temperment

u making fun of me BOY!!!!!

he ment search the forums not google


and no im all for extra content but content that will be fun for the majority

lol the boost drop im talking about in 1st and 2nd gears isent cause the turbo is to small it cause their is no load on the engine cause the wheels spin so easly and thats in the dry :P in the wet the most boost i can make is 12psi in 5th gear at 110 kph befor it spins :P

and yer im going o up grade my turbo but injectors ECU and exhast manafold and new plenum will be needed befor the turbo

allso got a 255L PH fuel pump and sard reg siting here to go in

but in stock form no car should lose boost at higher rpm

hehe i did other things to the car like the cooler and better intake piping for more air flow but the turbo is what the RB30ET came standed with

Quote from Riel :

Ah, nice cooler
But when the air is cooler when it goes inside the cooler, you always win more. 3% more air at 10 degrees temperature drop (Celcius).

The wheeldiameter can be a solution for sure, but it'll take spooltime. Twin-setup maybe?

Anyway, it's really not easy, and maybe it even isn't theoreticcally explanable for the sake of normality Mostly it's a combination of knowing what you do and experience.

Good luck with your setup, got a story running somewhere on the net?

But, well, the XRR drives quite predictive in terms of boost. So not that bad.

na no story mate i been slowly modding the car for 2 years now owned it 8 years done all the work my self
list of mods

custom cold air intake
3inch mandrel bent exhaust (paid for this to be done)
boost controler set from 6psi to 15
converted from auto to 5spd manual
put lsd in live axel removed broken lsd (1 week) installed mini spool
re did the hole suspension with custom kingsprings ie the lb progressive rates
swaped out so many differnt size tyres and rims its not funny looking for traction
removed rear swaybar to help with the locker on the track

repaced the clutch twice

and other various things but my current step is waiting on my tyres
Falken Azenis Sport - RT-215
235x40x17's
and after that im geting a custom 35mm front swaybar ebc redstuff pad's and then on to more power

yer more or less my issue with this turbo is it cant flow enough air at higher RPM for to hold the boost at higher RPM im only talking about 3rd gear up.the issue with the lower gears is wheel spin limits load yer . i cant explain what i mean :P but if anyone wants to learn more about it go to allmost any decent car forum and you shall be enlightened

their is 2 ways i should go about fixing this

1 is change the exhaust wheel from a .73 ar to a .86 or 1.06 rear ar

or get a bigger turbo with both .86 ar's like a GT35/82 that i will be buying





Riel

i dont have a hot air issue 600x330x90 intercooler dose the job well rated at around 700hp :P
btw im only making 290 HP at 5500 at the wheels and about 450 NM of tq at 4000 :P
got about 7k to spend to get 400+

lol i found that site stupid it makes compleet sense most people should by now know that the universe is infint and so is them paradox's :P

its like the fact that if you didnt post this thread it would have been a shorter time for this patch to come out for us because we wouldnt have thought about it and in our perception of time it would be a shorter time untill it is done. just as if you never knew about the patch it would be out befor you knew it. Not that your thoughts about the patch have any affect on its release time or time itself.

Last edited by MAD3.0LT, Tue, 21 Oct 2008 09:55.

Quote from Riel :

To react on MAD"s first line, more RPS is more air, for so far you were wrong

It IS the exhaust gas, the heat makes it expand so more volume. It all comes together. SO you are right in a way but not explaining it properly

well yer i know what you mean but their is so many things that come into play i cant explain them for the life of me

example
in a road car i drive if i put it foot flat from 1000 rpm it dose this
1st gear wheel spin and 11 psi at 2200 rpm and drops off at 4000 rpm to 4 psi
2nd gear 14 psi at 2400ish rpm wheel spin and drops off to 12 at about 5000rpm
3rd gear no wheel spin 15psi and drops off to 14 psi at 6000 rpm
4th same as 3rd
5th would be the same but cant get the car to 6000 rpm cause thats like 270kph :P

as u can see when rpm's are higher and load on the engine is lower it makes less boost

but the main reason the car lose's boost at higher RPM is the turbo ar's and size is wrong for the engine displacement

lol i sent my RL personal best arround queensland raceway trailbraking :P

stupid brake pad's were fryed after 2 laps :P

or retard the timing and a car shouldnt be detonating if its a NA :P

Quote from morpha :

That can't be, the turbo is driven by the exhaust gas which should be solely rpm-dependend. However, I think the turbo inlet valve is now somehow connected to the throttle, I don't get any turbo pressure at all if I don't floor it

lol real turbos are NOT RPM based
a comment miss conception is that its the exhaust gas that spools the turbo but its really the Heat from the gas that makes a turbo spool harder and faster. A turbo charger has to rely on the gas being hot so it can travel extreamly fast to hit the rear housing fins more heat ='s faster expanding gas = more load on the engine = more heat and in turn ='s more boost.
allso most turbo cars u can hold them flat to the floor in nutrel and it wont go over 0psi exept on its way up to redline. allso the AR's of the intake and exhaust wheels have ALOT to do with how a turbo will react on the car allso engine displacement and ALOT of other things come into affect ie tuned lenght extractors and even the placement of a external gate can alter how the car spools.

but as this is a racing sim forum i wont go into much more depth :P
the turbo's are wrong but Not as bad as they used to be.


oh and AjRose stupid me calling it a dump :P its just what it looks like to me as thats the only pipe im going to dump into the air :P

Last edited by MAD3.0LT, Mon, 20 Oct 2008 07:32.

yer advatise some advan A048's and D01J's


i need to find a good supplyer of these

hey guys my shifter has seemed to get more sencitive in sequential mode its that bad now the rebound of changing down gears in RBR makes it go back up a gear

heheh i played Motor city online all of beta had over 50 accounts. was a good way to get lots of money