single turbos as responsive as twin turbos

[cobrAA]

Does it exist?! is it possible to find a single setup as responsive as a twin gtss setup that can produce 600-700hp at the wheel ?

I feek like my setup is pretty maxed out and my only option would be nos.

[GTR-Dad]

I have not done this, but from what I understand of turbo design you're always trading off peak airflow with responsiveness. A well chosen single can be as responsive as twins that can flow the same air, but if you want to get the best of both worlds you need to get a bit fancier.
Read up on twin scroll technology. You'd need the right exhaust manifold to take advantage of this, but you could expect better response than from a constant pressure system.

[frankiman]

you haven't maxed out your setup at all yet, turn up the boost to at least 22-23 psi

[cobrAA]

you haven't maxed out your setup at all yet, turn up the boost to at least 22-23 psi

I'm already at 21 lol... it's not 1 psi that will change the world.

I doubt I will ever be able to reach more than 550whp with this setup.

[Dragon Humper]

Just keep cranking it up untill to see the intake temps start to spike. If they have been pretty steady up to this point then it will be easy to see when the compressors are truely out of breath. Once they start to climb rapidly back off about 2 psi and you are at the top of the comfort zone for your compressors, turbines and system as a whole. What can change though with more bolt ons is the VE of the entire system and can stretch out your power a bit at the psi your turbos are maxed out at.

Truely big power twins are laggy as hell, it's much better and cheaper to go single up to 1000hp (I am at full boost at 4500rpm). After that you need to go twins.


Jon.

[cobrAA]

I will try to look at my graph if I can find it back but I getting a kick at 2.5.. and a very nice kick at 4k.

I would say I'm full boost around 4k easily.

thanks for the extra info. I'm expecting to go hit 25psi but still I don't expect a massive gain here.

[GTR-Dad]

I'm already at 21 lol... it's not 1 psi that will change the world.

I doubt I will ever be able to reach more than 550whp with this setup.

I'd work on de-bottlenecking the air flow before changing turbo charger. Efficiency>Boost.

[cobrAA]

I'd work on de-bottlenecking the air flow before changing turbo charger. Efficiency>Boost.

for this, you gotta know someone you have confidence in.

[GTR-Dad]

that can produce 600-700hp at the wheel ?

For THIS you need to know someone you have confidence in!

d

[gtrjon]

for this, you gotta know someone you have confidence in.

hes not talking about porting specifically hes talking about exhaust, intake + hard piping kit, cam gears, properly chosen cams, basically everything that will allow your motor to breathe and flow more. if you need someone you have confidence in to achieve this you prob should do some more research.

[cobrAA]

hes not talking about porting specifically hes talking about exhaust, intake + hard piping kit, cam gears, properly chosen cams, basically everything that will allow your motor to breathe and flow more. if you need someone you have confidence in to achieve this you prob should do some more research.

I've got every single mods you just mentionned. All I'm missing is porting but I realise that porting it's not just as easy as.. hey lets make those hole bigger and call it a day. and I didn't find someone in QC who could do that kind of job.

I appreciate all your times taken !

[cobrAA]

BTW, gtrjon, your build is one of the reason why I'm wondering about single..have you ever run on a 1/4 ? I bet your time might be close to mine and that's only at 12psi LOL..

[Super_Dude]

Every result for the new borg warner EFR's make pretty amazing response/spool results.

The 9180 on the hi octane r34 made 70 KW's ATW over there -10 setup on a rb30 in the midrange. They are considering swapping the old rb26 r32 over to the 9180.

http://forums.evolutionm.net/evo-dyno-tuning-results/573459-borgwarner-twin-scroll-7670-dyno-graph-2.html

Scroll down to post 22 for some entertaining comparisons. Keep in mind that that is at 30psi. That is not very high boost on a 4g63.

I think a efr8374 would be the ultimate 700-800whp setup. (I might be biased, I've been waiting to put mine on for a few months)

Will it be as responsive as a GT-SS, maybe. Nobody has really posted results for a rb26 with an efr8374.

[gtrjon]

BTW, gtrjon, your build is one of the reason why I'm wondering about single..have you ever run on a 1/4 ? I bet your time might be close to mine and that's only at 12psi LOL..

my build is almost a drag build. main focus of my build. but i made 421 @12psi on rgs dyno lol. I should be 11s with my set up right now but my clutch is ****** and wont stop slipping. I am ordering a triple plate this week and will be heading down to pacific raceways since mission is closed for the season. the one night i went is pretty bad. i ran a 13.8 @ 111.92 with a 2.98 60' i ran 13.1@104 stock... any one that knows anything about drag will tell you the 2.98 second 60' tells the entire story. with a good driver and some decent tires a bnr32 should be putting down consistent 1.5-1.7 60's. i love single set ups for a number of reasons, simplicity less components more room to work with in the engine bay. less trouble shooting when **** hits the fan, external dump nuff said, high power numbers to compensate for my little guy, appearance i like to be able to atleast see where all my money is going.

[GTR-Dad]

I've got every single mods you just mentionned. All I'm missing is porting but I realise that porting it's not just as easy as..

I would expect more from the engine you describe at that boost.
You'll make more power by turning up the boost, but I really think you can add substantial power by optimizing what you've got.
Are your cams correctly degreed?
d