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GT30 with 0.63 AR exhaust - light switch?

Abo Bob

By Abo Bob,
in Engines & Forced Induction

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PHaT MR30 Grand Master

PHaT MR30

Posted
Posted

hmm this is interesting as i am looking to go down the GT30 route later this year, and was told by alot of ppl to get the 0.63 ex housing, but by the sound of things this is NOT what i want for a street driven car!

INASNT what power are you making with the .86 rear and .70 front combo?

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INASNT Grand Master

INASNT

Posted
Posted
hmm this is interesting as i am looking to go down the GT30 route later this year, and was told by alot of ppl to get the 0.63 ex housing, but by the sound of things this is NOT what i want for a street driven car!

INASNT what power are you making with the .86 rear and .70 front combo?

Internally stock motor so far

Mel Auto Salon 04 [email protected] bar

Selectamz dyno day [email protected] bar (outside dyno so lots of nice fresh cool air)

B-Man Grand Master

B-Man

Posted
Posted

Adam - try and get an HKS 2835 Pro S low mount - I reckon they are the best performance / response. Yes you might pay a bit extra for HKS - But they are the Shit and resale is better than hi flow.

PHaT MR30 Grand Master

PHaT MR30

Posted
Posted
Internally stock motor so far  

Mel Auto Salon 04 [email protected] bar

Selectamz dyno day [email protected] bar (outside dyno so lots of nice fresh cool air)

wow! my mate seems only able to push ~250rwkw with this turbo on an RB30

what size injectors are you running?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
hmm this is interesting as i am looking to go down the GT30 route later this year, and was told by alot of ppl to get the 0.63 ex housing, but by the sound of things this is NOT what i want for a street driven car!

INASNT what power are you making with the .86 rear and .70 front combo?

im punching out 270rwkw on 16psi, 16psi @ 4000rpm or there abouts depending on gear etc.

denham, isnt your a .82 rear? i cant remember what mine is.

I thought it was .82. And mine is no different to yours

a .63 would be snappy, mine is so progressive it wont break traction in the dry (except in 1st if your rough)

Angry Proficient

Angry

Posted
Posted

but still man ..pushing that much on a standard 25 even on a dyno day....how much will it take b4 she splits like a hoe

Denham, what sort of duty cycle does your injectors run at when it makes that much mumbo on the dyno?

Matt

INASNT Grand Master

INASNT

Posted
Posted
but still man ..pushing that much on a standard 25 even on a dyno day....how much will it take b4 she splits like a hoe

Denham, what sort of duty cycle does your injectors run at when it makes that much mumbo on the dyno?

Matt

As a daily driver it runs 1 bar boost and makes around 255rwkw and even with that power driving to work etc I dont drive like a jackass 90% of the time :mad:

As a daily driver driving around at 1.4bar boost is a waste of time, and remember the engine wont be making that much power all the time even if i was running 1.4 bar coz thats just a peak power figure and i aint changing gears at 7500rpm all the time, where that peak power is made.

With the 550cc injectors and 044 pump with stock fuel reg the injectors are at around 80% duty cycle

INASNT Grand Master

INASNT

Posted
Posted
he dont drive it around like that everyday. His Dyno figures are with octance booster etc in the tanks.

Daily its not making that   :mad:

U still on about that octane booster thing? I just put in a bottle i bough at the local servo before MAS dyno comp because the fuel i had in my tank was over 1 week old

Angry Proficient

Angry

Posted
Posted

besides.. i really dont think octane will give u that much more .....specially when ur over 300 .....its still over 300 with or without booster. 300 is ****en massive in anyones language for a car thats regularly driven.

and 80% duty is pretty comfortable levels..... good going .. kudos to the tuner thats for sure.

Matt

oor33sky_ Rising Star

oor33sky_

Posted
Posted
GT30 with 0.63 a/r exhaust housing come on like a light switch??? YES very much so. You will find it very hard to get off the line in the first few gears with that small housing and you will be in wheel spin city, and then have no power high up in the rev range. And if it raining forget about driving your car.

My GT30 with 0.86 rear and 0.70 front housing (RB25 internally stock) comes on around 1 bar at 4000rpm and makes power all the way to 7500rpm, and bounces off the rev limiter in every gear quite easily, and is easy to drive around normally and come on power nicely without to much wheel spin.

Totally agree with all of the above!

Sacrifice low 4 top end any day..all about power 2 the ground, no use having too much power off the line..ur right, just wheelspin all day long!

Once the GT30 hits full boost around 4500rpm ur already movin' along..so have maximum grip = more power.

INASNT, sounds like u have a very similar set up 2 myself

I have a GT30--high-mounted, external gate, 550cc injectors, 044 pump, GReddy e-manage etc. I am making 256kw (340.5hp) @ wheels (auto) on 16psi.

oor33sky_ Rising Star

oor33sky_

Posted
Posted
what rated GT30?

you should be up around 270-280rwkw... if using the 600hp

Yep i know..u mighta missed the bit about it being auto..if it was a manual would more that likely be @ that mark.

Also that 256kw is tuned @ only 16psi.

teejay Proficient

teejay

Posted
Posted
U still on about that octane booster thing? I just put in a bottle i bough at the local servo before MAS dyno comp because the fuel i had in my tank was over 1 week old

he enjoys having a cry.

im considering gt30 on a rb20 with no cams or anything, .63, be interesting to see how light switchy its going to be

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