Single Or Twin Turbos

[Nismo 3.2ish]

I asked this question yesterday but it was lost somewhere, maybe I posted it in the wrong area ,NA,

I am new to R3s GTR, have a 350GT Skyline import , I had a APS Twin Turbo System installed and it goes well for a dd.

I just bought a 99 R34 GTR, the car had mods from Croydon Racing Developments 5 years ago ,one thing they did that I do not understand they replaced the twin turbo system with a Greddy T78 single turbo, CRD seems to have a very good name in the business, so I guess they did it to get a better performance from the work they did.

Most of what I have read indicate a TT is better, why would they change to a single if a twin system is better and could have used the$s on some other mods.

But a few say that a big single on a straight line 6 is better, I have no idea and would like some people that know these cars to help me understand more about the R34, THANKS

PS always loved the Skylines and now I have one

[Piggaz]

What's your goals for the car?

Power?

Are you happy with a big high mount under the bonnet with "the cop factor"?

[Nismo 3.2ish]

I feel like a bit of a dummy on this site as I am sure you blokes ,well most of you know what you are talking about. ??

To be honest I do not really know what I want from this car until I get it home as it is being tuned today, I will not know what the power will be until they have it on the Dyno ,I am sure that around 600hp will keep it at a safe setting from what CRD said. I had my 350GT TT tuned to 350@whp and it is fun when you get a bit bad.

BUT from my test drive this car will be totally different in just about every way, except enjoyment.

Think I will have some fun driving back home with the OS Giken quad clutch 350Kls ,like the test drive there could be a few stalls and hops getting through Sydney on the 350K ride back home , i hope it has a good battery

The idea of power is nice but not everything. You read heaps about the R3s Skyline series and how well they handle and can be modified, I want to feel the car for myself, learn to drive it and enjoy it,

At this stage I am trying to understand the car and the modifications that have been made to it and the only way I know how to do this is drive it and ask questions .

I am not a car person in the real sense or a rev head but I have had many cars, I have been driving for 55 years, I enjoyed all of them, now I am moving to a different type of car, you only live once so do the things you want to do now!

[gtr jet]

Well as soon as she's off the dyno and and back home give us some details and pics and we should be able to help you with any drama's you may have.

[Nismo 3.2ish]

Thanks, I am sure I will drive you nuts for a while

[Nismo 3.2ish]

Well as soon as she's off the dyno and and back home give us some details and pics and we should be able to help you with any drama's you may have.

Well it is off the Dyno and no real surpises, 338AWKW, they sure can crap when advertising cars and seem to get away with it, I am sure it will be enough for me and CRD said with some other mods. fuel system and cam it will be able to get much more as with the fuel system it has it will starve for fuel.

When I get it home I will take some pics and post them.

Think I will have a go at the interior if my back will let me, old upholsterer

[Nismo 3.2ish]

Well as soon as she's off the dyno and and back home give us some details and pics and we should be able to help you with any drama's you may have.

car is great and have started to detail it and when it is finished I will take some shots, black shows everything!

It is good to be driving a manual again after 7 years, the Quad clutch is easy so as a DD it is good.

It has a T78 and I want better response earlier than around 5k. Dropping the clutch at high revs is not a good look around town, so I will need to go Twin Turbo unless there is something I can do with the T78, I am putting Tomei Poncams type B in, I have looked all over the web and I know someone will say" look some more" "this topic has been done to death" BUT the thing is everyone has a different opinion on brands and models. This is a Skyline site and I feel I will get the answer I need.

Systems like.

Nismo R1

TT 2860- 5,7, 9

GT 35R , SS

T618Z , T517Z

TS 172 and on and on. As a newbie I am confused.

As a DD I want the car to be responsive all the way but starting as early as possible.

The car has enough mods to handle power, well maybe except for the fuel delivery it has a Bosch 044 .

Any help welcomed.

[GTR_JOEY]

just PM'd you Peter

[XRATED]

I'm guessing your a slightly older dude... so here's my suggestions.

R34 N1 turbo's or the Garrett equivalent. to push decent average power, comes on early and will swing right out to 8k

If you want a bit more and don't mind loosing a little more down low then T517z 8cm (my personal fav) or Garrett -5's.

Greddy/HKS hard pipe it, ported stock manifolds, decent dump pipes etc...

330awkw that comes on early is a much faster car that a 400awkw lag monster on the street.

Cheers

Justin

[XKLABA]

Since you already have the car setup with a single why not just find a better/smaller single that bolts into where your current one is that will give you the power/response you are after

[Ben C34]

Since you already have the car setup with a single why not just find a better/smaller single that bolts into where your current one is that will give you the power/response you are after

That makes way too much sense!

From what i can gather TT350GT is a bit impulsive and has cash to burn

[gtr jet]

I'd be going with what Xklaba said after you sort your fuel system. Turbo technology is a lot better these days and it shouldn't be too hard to find a more responsive turbo to bolt in the T78's place.

[Nismo 3.2ish]

Since you already have the car setup with a single why not just find a better/smaller single that bolts into where your current one is that will give you the power/response you are after

Thanks for that I will have a look into it.

Is there one you could suggest

I'm guessing your a slightly older dude... so here's my suggestions.

R34 N1 turbo's or the Garrett equivalent. to push decent average power, comes on early and will swing right out to 8k

If you want a bit more and don't mind loosing a little more down low then T517z 8cm (my personal fav) or Garrett -5's.

Greddy/HKS hard pipe it, ported stock manifolds, decent dump pipes etc...

330awkw that comes on early is a much faster car that a 400awkw lag monster on the street.

Cheers

Justin

Yes, old Dude 71, but 21 inside

Thanks for the advice, it is hard when you know Sh@t all about something, at least I do not BS, just learning, never too old to learn.

The only DUMB A person is one that does not ask people that know what they are talking about. thanks again

Had some good info today

[Nismo 3.2ish]

That makes way too much sense!

From what i can gather TT350GT is a bit impulsive and has cash to burn

Maybe, I am here to get advise and I have had some great help today.

I want the car to do what I want and want to know how to do it, once I get as much info as I can then I can make a more informed choice.

What advice can you offer me

[XKLABA]

I don't know the bolt pattern of the T78 of hand but anything in the PT range is good, probably a PT6262 will get you where you want to be

Or even one of the HTA turbos

[Ben C34]

Maybe, I am here to get advise and I have had some great help today.

I want the car to do what I want and want to know how to do it, once I get as much info as I can then I can make a more informed choice.

What advice can you offer me

I didn't say that to try to offend you, sorry if I did.

I have already given you the advice of taking it easy for a bit and doing some research. if it takes another couple of weeks it will be worth it, both better and cheaper.

[Nismo 3.2ish]

Thank for the input, now to make it easier for me. After a month of driving the car I know I will never use the set up I have.

If you can please give manufactures name and product # for turbos that gives me power early, 3K-ish or less if possible,

1. What is the best Single Turbo that will give me the response I am after

2. What is the best Twin Turbo system to give me the response I am after

Thanks Pete

[YoLoBaCh]

twins for V6

big single in I6

[gtr jet]

The only thing that will get you response like that is -7's or a small single. How much power were you after again?

As the other guys have said, a precision 6262. It won't give you full boost by 3000rpm but it is pretty damn responsive for a single.

[tricstar]

Efr 8374iwg ( I think it is, might have those numbers wrong )

Friend has one on his gtr, it is a 3L, but makes something like 22psi before 3k and can go on to make 600whp.