Replace Twin Turbo with one big Single Turbo?

[toughguyjr]

Hey guys,

So I don't have a Skyline (yet) but I'm thinking about the possibilites of upgrading it when I do finally get it. I'm looking to make this car into a track car (not drag, maybe some drift), and my mechanic friend told me that one big turbo is more effecient than two?

Is this true?

Let me know your opinions.

Thanks.

[GreGS15]

basically everyone goes to single cause its more cost efficent...2 turbos equalls double the piping etc,,, single turbo is also eaiser to tune...i would convert to a single turbo....more cost efficent...

[toughguyjr]

Alright, just "PRETEND" I have lots of time and money and I just want to get the coolest, most badass setup (ie. most power). Would twin turbo be better (not necessarily easier or cheaper) to achieve this?

Note: No I do not have lots of money, but might stretch my budget to make my car (when I get it) unique.



D

[Paul2x]

If your just going for just peak HP and a gangster set-up you go with Big-twins.

The whole idea of which is better is completely preference between single's and twin's. To answer your initial question, my answer is it depneds, sometimes yes sometimes no. In many cases you can make the same power with either just a matter of what you like in other aspects...(power deliverly, sound, look, maintance, and cost)

I've had 4 different turbo set-up on my GTR so far and they have all been good just were targeted for different stuff.

With the RB your best bet is to pick a HP #, decied what type of driving you'll be doing the most with it and pick a turbo set-up from their.

-Paul

[toughguyjr]

Ok, lets say 639 HP (when I'm done), mountain pass/drift/circuit. I also like to keep my cars at the top of their rpm range (as I'm sure most of us do), so the turbo just has to be efficient between 4.5-8 or even 5.5-8.

I know what you're probably going to say, "If you are just going for 639 HP, a single turbo would be fine," which is probably what I'll end up doing in the end (just because it's not going to be a straight line car). Though it would be gangster to have a twin setup.

D

P.S. Any good annual drift or circuit events on the west coast close to vancouver or seattle?

[themadscientist]

you can make that kind of power with a set up upgrade internal wastegated twins. If you want the reponse get two properly-sized twins with aftermarket tube manifold and call it done for boost production.

[Paul2x]

If your going to do "everything" to your motor, and from the sound's of what you like to do. You'd be fine with a set of small twin's like 2530's like "themadscientist" stated.

With head work and some big cam's and race gas you can do about 600hp at the wheels, and maintain your responce for your canyon/circut/drift fixes.

with larger turbo's you could get that same power on pump gas with the proper supporting mods, but you'll drastally lose your responce. Next option is bulid the bottom end and spin the motor to 10k.

[toughguyjr]

So stick with the twins then? If I'm going to spend the money on upgrades I'm not too worried on having to put race gas in there and I definately want the response.

Crankin the engine out to 10k was on the to do list too .

D

[Paul2x]

Yeah is a very cost effictive way to make 500-600whp.

Most people think single is a cheaper route and it is for a set-up over 600hp but under 600hp small twins are much more cost effective b/c you don't have to change alot of stuff. You can bascally just bolt the turbo's on.

If you can you need to catch a ride in someone's car that has a small twin set-up and a single set-up.

Small twins feel like OE, just faster.....but they sort of dye out up top in higher rpm's. Singles are topend monsters, that hit like a mad man and sound unbelieveable. You can get them to be equally as responsive as the small twins but you need really piece together all the right parts.

its' your call

[themadscientist]

A pair of these should do ya

[0wn3r]

Small twins feel like OE, just faster.....but they sort of dye out up top in higher rpm's. Singles are topend monsters, that hit like a mad man and sound unbelieveable. You can get them to be equally as responsive as the small twins but you need really piece together all the right parts.

i really almost crapped myself when i thought no one was going to mention spool time/turbo lag...

and define "efficient"

[themadscientist]

I like a laggy turbo myself. The anticipation as the thing spins up is like foreplay before I commence ****ing my opponent. I prefer to to race from a roll though or from a stop with a long stretch of road ahead where this is less detrimental. On a measured 1/4 mile I would of course prefer a properly sized setup.

[toughguyjr]

i really almost crapped myself when i thought no one was going to mention spool time/turbo lag...

and define "efficient"

Like I said, efficient for the type of raceing I will be doing (ie circuit, mountain pass and drift). For the most part, accelleration won't be from a stop. It will probably be at high rpms, through corners etc.

Basically, efficient in the sense that I'm getting the maximum amount of power I can, with little or no turbo lag (based on the RPM ranges I will be using), and without blowing up my engine.

If I could score a turbo that ran at say 60% at 5k, and topped out at 7k and maintained the boost until 8k, that would probably be prime. Don't ask me how much boost I'm looking for because I have no concept as to how much a car I don't have will be able to handle .

D

[Paul2x]

2835's would be too big.

For what you want to do the best bang for the buck is smaller units like 2530's or Apex' B60's (race version)

They spool like stock, they do fall off a bit on the top end of the RPM's.

Your other option would be to go with a smaller single. Like the a T04R or if you want a little more HKS T04Z.

I was very close to getting a T04Z myself. Great responce...no as good as 2530's but it hits hard around 4-4500, differnce is it pulls hard all the way to what ever your rev limit is ....8k no problem.and sound's sick

I went with the next size up b/c i was shooting for a higher hp range with best resonce i could get, but also like to have the big hp on the highways.And it looks mean...lol

I'll get more into detail if you'd like

Here's a few pic's of my set-up to give u an idea.

[IMG][/IMG][IMG][/IMG][IMG][/IMG]

Paul
Modified by Paul2x at 5:13 PM 8/29/2006

[themadscientist]

The T04Z gets my vote as the sexyiest looking inlet, nische!

[0wn3r]

[IMG][/IMG]

what is that in?

[toughguyjr]

[IMG][/IMG]

Paul

Modified by Paul2x at 5:13 PM 8/29/2006

Wow man, amazing setup. So you went with a single turbo (which one again?). I am a big fan of how turbos sound, but at the same time I think I lean a little more towards performance.

I think I'll look into the single T04z that you were talking about. Sounds close to what I am looking for.

Thanks!

[Paul2x]

what is that in?

My GTR

Wow man, amazing setup. So you went with a single turbo (which one again?)

Thanks very much, I'm running the slightly larger HKS T51R Kai b.b.also motor is now 2.7L with HKS cam's and a Complete OS Giken close ratio gearbox.......which all help with responce.

[toughguyjr]

I'm running the slightly larger HKS T51R Kai b.b.also motor is now 2.7L with HKS cam's and a Complete OS Giken close ratio gearbox.......which all help with responce.

[Vkoslak]

so if 2 turbos = more gangsta, would 6 turbos (1 per exhaust port) be ghetto fabulous?

[240sxS13guy]

http://videos.streetfire.net/h...8.htm

i dont know if the link will work for yall but it worked for me, but this is an 8 turbo powered ls1....just thought i would through that up there lol, so this must be gangsta licious to the max!!!

[postism]

is there video of that thing running?

[toughguyjr]

Ya, I've seen that thing before (in car mags) but never seen it running. I think it's just a concept prototype...

Still gangsta though .

D

[DuaneG]

I hope I'm not thread hijacking but since we're already on the subject.. Would an RB26 with 2 twin T66s be a good idea? Pros/cons? (Explani like I'm a newbie. )

[Count Zero]

Paul....You're R32 is incredible looking. I just happen to have the November issue of SCC open on my desk right here.

I'm about to pick up a R32, and seeing the pic of your car made me fall in love with the Tommykaira bumper and grill (even though I'm going to stick with a twin-turbo setup......at least for a while). Where did you get it? I've been scouring the web since I put the deposit on the R32, but can't find anyone who sells that grill!

[jdm-online.com]

I know this thread is old but I wanted to share this picture with fellow members and wondering if the turbo is an HKS T04R!! I have this car in stock but I couldn't find any HKS markings on the turbo.