Goal 320awkw - R34gtr

[No Crust Racing]

Looks like we can bag this one up and close it now.

Good luck Bakes, be sure to post your results

[mass_iv]

Guys all i have to say is wats the point in flaming someone over a turbo???

I have a set of 2860R -5's on my 34 GTR and believe me they are far from "big" or laggy. They will make 320awkw with ease all u need is the right fuel setup. Mine made 310awkw with stock injectors and stock fuel pump all i added was a FPR.

Bakes, as iv told you in PM's these turbos are very responsive, you basically cant tell the difference between these and the stockies, and they pull all the way to redline. Ideally you'd like to have injectors and a fuel setup to allow you to push past the 320 mark, so thats wat stopped me at this stage but with your setup u shud see a figure between 320-350awkw...

As for the -7's being a better option im pretty sure they are much laggier and a bigger turbo which punch out more power, so no not a better option. i had the same prob wen i went through this decision making few months back, i do not regret the choice i made, but again i wanted good power without sacrificing response.

[Bakes]

Martin Donnon has stated in Issue 93 of High Performance Imports that the turbos Im getting are the pick of the bunch even for 300rwkw so I dont need luck. Ill take his advice over some of the internet experts here.

This thread has turned into a joke, delete it. Still no help in support mods I may need, keep flaming my turbo selection by all means!

[No Crust Racing]

Bakes: Check the thread I posted a link to mate, it has answers to your support mods questions in there which is why I posted it in the first place

Massive: "As for the -7's being a better option im pretty sure they are much laggier and a bigger turbo" - Nah mate, the -5's are bigger which is why they will flow over 400rwkw's if required. -7's are the smaller GT-SS/N1 equivalent.

My "Good luck" is a genuine one, no sarcasm, have fun with the build process and let us know how you go.

Cheers

[Bakes]

Thanks Mass, -7, -9 are like N1, GTSS turbos so not laggy, I think you are talking about -10 which are the GTRS equivalent turbo.

Im sure I will see similar results to yours with my -5. Thanks for your comments.

[Bakes]

Bakes: Check the thread I posted a link to mate, it has answers to your support mods questions in there which is why I posted it in the first place

Massive: "As for the -7's being a better option im pretty sure they are much laggier and a bigger turbo" - Nah mate, the -5's are bigger which is why they will flow over 400rwkw's if required. -7's are the smaller GT-SS/N1 equivalent.

My "Good luck" is a genuine one, no sarcasm, have fun with the build process and let us know how you go.

Cheers

No worries, so besides the turbos I really only need some injectors and a Power FC.

[No Crust Racing]

Definitely going to need a computer to have it tuned, don't think you had one on your currently equipped items list. .

Injectors, I thought, were a must but Massive is saying he made a similar figure without them, I'd not heard of that before and I think I'd rather shell out the extra bucks then lean too hard on the stockers and risk leaning out.

What duty cycle are you injectors on at that power Massive?

At this power you're starting to push the bottom end so reducing the risk that anything else can go wrong, like running lean on maxed injectors, is a good idea.

Ben at RacePace is widely regarded as a GT-R modification and tuning expert so he will have his own opinions on this too and has proven his expertise time and time again. A quick call to him might be a good idea too.

[Bakes]

Any injector brand like Sard or Nismo will be OK right?

[No Crust Racing]

Brand will come down to your personal choice and budget, anything 550cc up should be sufficient for 320kw's from what I understand but if you intend to pop this motor and go for 400rwkw's later you might want to just get a suitable injector now. Results shown on this board indicate that 550's will be close to 90% duty at this power. Which makes me wonder how you can get to 310 like Massive did on stockers, must be some crazy pressure...

[CSNet]

I am running -7s. I have 320AWKW. I have 20PSI by about 3,500-4,000RPM. What's the point of having 320AWKW but waiting until 4,500+ for full boost?

They are similar to stock turbo's for response, but handle a lot higher levels of boost. Don't bother with the -5's unless you want lag . Internet experts? How is that guy more qualified than any of us? Because he writes in a magazine? Think, SAU is full of real world people with these cars and these turbo set ups. People actually using them.

If you got -5's you'll regret it.

[Bakes]

HPI mag advises 700cc injectors, Ill get them ones

[No Crust Racing]

700's should be fine and give you some head room though I'm not sure if they'll keep up with what the turbo can do later down the track if you do rebuild. Can always sell'em off.

Edited December 22, 2008 by ActionDan

[Bakes]

I am running -7s. I have 320AWKW. I have 20PSI by about 3,500RPM. What's the point of having 320AWKW but waiting until 4,500 for full boost?

They are similar to stock turbo's for response, but handle a lot higher levels of boost. Don't bother with the -5's unless you want lag . Internet experts? How is that guy more qualified than any of us? Because he writes in a magazine? Think, SAU is full of real world people with these cars and these turbo set ups. People actually using them.

If you got -5's you'll regret it.

OMG here we go again. lol at lag, 500rpm difference or less if tuned correctly. Mass and others have said that the -5 have similar to stock turbo response, -5 will do the -7 job at lower boost and I can make more power on them later if i want to.

Im over it, I have the info I need, some injectors and a Power FC is all I need. Lock the thread up!

[CSNet]

Though usually more... 500rpm can be a long time waiting off boost...

Oh well good luck with the build let us know how it goes.

[No Crust Racing]

Cams/Gears will get him pretty close, it might not be as responsive as the -7's but the -7's will NOT be suitable for his intentions down the track. No point buying two sets of turbos if you don't have to. Also, less boost means less chance of busting the RB's bottom end sooner than one might like...

[Bakes]

Though usually more... 500rpm can be a long time waiting off boost...

Oh well good luck with the build let us know how it goes.

In first gear only.

[Bakes]

Cams/Gears will get him pretty close, it might not be as responsive as the -7's but the -7's will NOT be suitable for his intentions down the track. No point buying two sets of turbos if you don't have to. Also, less boost means less chance of busting the RB's bottom end sooner than one might like...

Exactly!

Plenty of people have upgraded from -7 to -5 and never looked back if you go through the various threads on GTR UK forum, Im just skipping the -7 step

[CSNet]

When I was deciding between the two I went for a spin in a GTR with -5's and one with -7's, the -7's were an entirely different driving experience. But each to their own.

Also - as for the injectors, I am running 700cc injectors which get to about 75% duty cycle full throttle.

[No Crust Racing]

Yes -7's will be more responsive but they also require more boost and will NOT be suitable for later goals, which is an important distinction here. So for Bakes they're not the best choice.

Cheers on the injector info, that should Help Bakes make a decision about how big to go on those.

[Bakes]

When I was deciding between the two I went for a spin in a GTR with -5's and one with -7's, the -7's were an entirely different driving experience. But each to their own.

Like I said mate, there are others that say the opposite to what you are saying also so each to their own as you say