High Flowed -7s Vs -9s

[gtr jet]

Correct me if I'm wrong someone but I doubt you could out power the standard engine with -9's on 98.

[sneakey pete]

Hks2510s are the same as the motive hybrids. Note the hybrids are -7 turbines with -5 wheels, so it won't be making -5 level power.

I know of people very happy with their 2510s though

[Hadouken]

Yeh probably limited on 98.

Stock motor power limit? how long is a piece of string.

Generally over 20psi put arp studs in.

[No Crust Racing]

Hks2510s are the same as the motive hybrids. Note the hybrids are -7 turbines with -5 wheels, so it won't be making -5 level power.

I know of people very happy with their 2510s though

GT-SS or -9s seem to be a proven path, I'll just stick with that.

Yeh probably limited on 98.

Stock motor power limit? how long is a piece of string.

Generally over 20psi put arp studs in.

That's around what GT-SS/-9s will need on 98 to make 330 I think.

Might just bang them in and maybe get the timing covers freshened up and put some cam gears on it at the same time.

[Anfanee]

Why not build a 3.2L stroker and put -9's on it.

Will make good power and be sooooo responsive!!!!

[No Crust Racing]

Because buying the car alone is a fair chunk of change for me lol so no strokers for a while.

[Hadouken]

Why not build a 3.2L stroker and put -9's on it.

Will make good power and be sooooo responsive!!!!

Haha. Stop it!

[No Crust Racing]

Yes I've seen those threads as well you trolls

[Anfanee]

All g mate you will have to rebuild it in the near future anyway. It's a GTR.

[No Crust Racing]

Hopefully not too soon as I won't be tracking it (or rarely if I do and carefully). It's just a weekender at most.

Comp was good, k's seem genuine and it's not making big power so hopefully it doesn't shit the bed straight up.

[r32-25t]

You won't need to touch anything internally in the engine till above 350kw at the wheels as long as it healthy and tuned properly. After 350 throw some head studs in it and keep pushing, a guy in WA has 500kw+ on a standard bottom end

[No Crust Racing]

For the cost and ease, I might just put head studs in to give the stock gasket its best chance of surviving,

[R31Nismoid]

A handful have claimed 380kw @25 psi.

I think 25psi would be the absolute max for them.

Yeah, claimed. And then failed to run the MPH at the drags (as in, not even close to 350rwkw). I don't think there is one "350rwkw+" -9 equipped GTR that's actually come remotely close to backing up it's roller number at the strip yet, even after all these years.

The problem with -7s and -9s is they simply do not respond to E85 well. Why you ask? Because they run out of air flow up top so you don't actually run out on 98 like you do with say a set of -5s because the boost is dropping off in the upper RPM - and when that is happening, you ain't gonna make much extra.

You get such good gains from -5s because you can run MORE boost than you can on 98 - they don't run outta flow on 98 as you get to around 20-22psi and for most motor builds are tapping out. E85 and 25psi and off you go and this is where you get the extra gains from in the top end and also the midrange due to so much extra air.

This is what -9s/-7s are a great street turbo on PULP. You will get some mid range on -9/-7 from E85, but it's just not going to give the kick/gains you get on -5s.

[No Crust Racing]

The GT-R I drove in QLD with -5's didn't excite me, but to be fair only dyno'd at less than 310kw for some reason (Haltech/pump fuel)

For this car, I'm willing to sacrifice top end for midrange and response.

[Hadouken]

127mph on mine. Going for another crack after a touch up toon.

[R31Nismoid]

That's a solid result for your power

[sneakey pete]

I saw someone claiming 400kw's on -7's, it ran 11.7's from memory though

[Piggaz]

What MPH?

[sneakey pete]

I was wrong, 11.2 actually, at 127mph. Dunno what sort of power that works out to be but not 400 i think

[Hadouken]

Lol. That's my exact 1/4 run