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The Garrett Gt30r Thread - Lots Of Info And Q's

The Mafia

By The Mafia,
in Engines & Forced Induction

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Tangles Grand Master

Tangles

Posted
Posted

rb25 auto awd - front driveshaft pulled for rwd dyno

249rwkw at 17/16psi 3rd gear

Garrett GT3076 700177-5015 IWBB Turbocharger with ported Nissan 45V4 front / AVO .73 rear housings

60mm diameter 84-trim GT30 turbine and 76mm diameter 7/14 bladed compressor wheel in 56.9-trim

JDM S15 Silvia 450/480cc injectors

z32 afm, tomei head, 3" exhaust, remap

Lithium Grand Master

Lithium

Posted
Posted

I used a Dynapack hub dyno, they read higher than DD - its not magically higher but enough to make a difference. I don't know what the difference is, the one I did 300kw on is thought of by a few (who are used to Dynapacks) consider it a heart breaker for hub dynos but still no DD style heart breaker.

Lithium Grand Master

Lithium

Posted
Posted

I know this is probably annoying for you, honestly it was for me too and its all my fault - so sorry about this. I have never removed the PRV as I don't have some vacuum hose long enough to reach from the wastegate to the boost source... the PRV has been spliced into my old one since I got it. I went and grabbed some the other day and went to put it on for the dyno tune (which was booked at the last moment) and found it didn't fit. The result of that is the PRV keeps snapping open and closed and stuffing up the boost curve and makes it not a realistic representation :D

For what its worth, when the PRV settles down the boost holds very very stable - I am going to get some vacuum hose that suits and am being hassled into putting my car on a dyno day in a couple of weeks so may end up just giving in to that without the valve and seeing what that does to the curve. I'll post the boost plot from that :happy: I didn't even bother getting this one printed.

Lithium Grand Master

Lithium

Posted
Posted

Its definitely going to make it build less, not more aggressively when I remove it - the curve will be more consistant. Strangely it doesn't seem to behave the way it appeared to on the dyno on the road.... Not sure what was up with that.

  • 2 months later...
HEKT1K Grand Master

HEKT1K

Posted
Posted

just read through most of this thread, some very informative stuff in here!

seems there is not much love for the 3071 .82; is the 3076 .82 really that much better for someone chasing 260-270rwkw?

wasnt me Collaborator

wasnt me

Posted
Posted
just read through most of this thread, some very informative stuff in here!

seems there is not much love for the 3071 .82; is the 3076 .82 really that much better for someone chasing 260-270rwkw?

3076 .82 would be the way to go. you will get bored with 270rwkw. atleast with the 3076 you have some more power left in it.

my 3076 makes 335rwkw on e85.

The Mafia Grand Master

The Mafia

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Good to see this thread still going! I see it a lot when I am googleing.

how do some of u guys get over 300kw with only 17psi on 3076r? hmmmm

I made 314rwkw on 18psi with water methanol injection. Torque was 720nm from 3000rpm all the way to the limiter.

mods:

Garrett GT3076, 0.6 compressor cover, 0.63 rear housing

Powerfc (Tuned by me)

Water Methanol Injection

Standard Engine

Standard Manifolds

Front mount Intercooler

Big Exhaust

Nismo 555cc Injectors

Standard FPR

Nismo 275lph In tank pump

just read through most of this thread, some very informative stuff in here!

seems there is not much love for the 3071 .82; is the 3076 .82 really that much better for someone chasing 260-270rwkw?

They aren't really that great. Better off with a GT3076 with a 0.63 rear.

3076 .82 would be the way to go. you will get bored with 270rwkw. atleast with the 3076 you have some more power left in it.

my 3076 makes 335rwkw on e85.

I'll be keen to test that with the RB30.

what would be the difference in response though?

not with a 0.63 rear.

I have a like new 0.63 internal gate rear housing for sale if anybody wants it, and a dump pipe to cat to suit. I'm unloading it because I have a RB2530 and the 0.63 rear might be fun, but is a little too restrictive for the RB30s extra breathing.

Sale thread here:

http://www.skylinesaustralia.com/forums/Rb...ml#entry5264403

  • 6 months later...
  • 2 weeks later...
sriver killer Proficient

sriver killer

Posted
Posted

i'm looking at buying one of these

700177-5007

gt3076R

external gate

front trim 56, .60 ar front surge slotted

.84 rear trim, .82 4 bolt rear

i have the option of the .60 or .70 front

is tthere going to be much difference?

my combination at the moment is a standard rb25det

Ive got a 6boost and plazmaman

was recently making 300rwkw on a standard exhaust manifold. 3076R.70 front. .82 rear internal gated

i

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