Garrett Turbo Help

[jet2nv]

hey guys just wondering how laggy would a gt3582 with a anti-surge a/r70 with a .63 GT 3 inch 4 bolt rear be compared to a gt3076r .82 GT 3 inch 4 bolt

if my goal is only 300-310rwkw max on a rb25det series 2 with supporting mods

[wolverine]

I am pretty sure the 0.63 GT35 turbine flows pretty similarly to a GT30 0.82 so it should be pretty similar.

I had a GT3040 and it made 18psi by 3900 so it should be there or thereabouts.

[jet2nv]

can anyone else shed some light

[JonnoHR31]

if your not after anymore than 300-310rwkw then go the gt30, perfect for it

[jet2nv]

a gt3040 or a gt3076

ive got a gt35 sitting here but a .82 rear reason y i asked about the .63 rear is alot of people will swap me a .63 for a .82 or should i just sell it and either get a gt3040 or a gt3076

[NYTSKY]

This will give you an idea.

This is a GT3076.82 with a GT3540.82 over lay.

You give away a fair bit of midrange for more power up top.

[Mick_o]

3076 3040 is a low tech turbs so ive heard

[R31Nismoid]

The 3040 just has a larger front wheel, and becomes a bit surge prone in lower rpm

[JonnoHR31]

yep 3040 (3082 in new terms) is way too much compressor for a gt30 hot side.

if you already have the gt35 and can easily get a smaller rear then that would obviously be the easiest and cheapest option. a lot of people seam to get good results with the .63 gt35 which is strange because its a bit of a mismatched turbo. personally i'd prefer a larger housed gt3076 but each to their own.

just keep in mind, even if you get similar results the larger reared gt30 will be easier to drive than the .63 gt35, it will come on more progressively and make traction a lot easier

[jet2nv]

yeah i think i might sell the gt35 and just get a gt3076 with a .82 it will only cost me $1350 for a gt3076 so its not to bad

traction the less the better

[jet2nv]

so im thinking about getting the GT3076 with a internal wastegate .82 rear i wonder if that will be ok for 290-300rwkw without boost problems

[Mick_o]

I reckon it should be fine mate i have a GTX3071 with .82 internal gate made 288kw @ 21psi without boost control issues im now at 307kw @ 18psi with 25psi coming soon. YAY! Just make sure u dont use 1 of them dodgey divorced front pipes

[Harey]

so im thinking about getting the GT3076 with a internal wastegate .82 rear i wonder if that will be ok for 290-300rwkw without boost problems

What boost problems? It would have to be THE most common turbo on an RB25DET for an obvious reason. There are countless 3076s with internal wastegated 0.82 rears making 290-300rwkw. If you choose the GTX3076 they seem to respond well to higher boost levels above 20+psi.

But geeze looking at NYTSKY's thats a lot more top end with the 35! I know it has a lot of other mods and a fresh engine etc but if your after a car to break traction and do naughty things then its quite a good option. But if your after an all round fast car with linear power/torque then GT30 it is.

[Mick_o]

+1^ for the Gt 30 perfect balance of power and response on the street

[jet2nv]

yeah i just sold my gt3582r today for 1500 and im looking at 1480 for the gt3076 with the 5 bolt internal wastegate .82 rear just not to sure what todo about a dump pipe as i wont be able to drive it to the exhaust shop

oh i though people had problems with boost control i must of misread something hahaha but yeah hopefully with 290-300 the gt3076 will still be naughty hahaha

[Mick_o]

Its still naughty mate should do 0-lose your license in around 5 seconds

[wolverine]

0.63 IW housings can be an issue with boost control not the case with 0.82

Aftermarket bellmouth dumps are available for these.

[rondofj]

Is it true that nowadays the Garrets are costing as much as or less than the Hypergears, which are not a fully bolt on either.?? Re: custom intake, 90deg elbow, water lines etc, the only thing that bolts on in the HG and not on the garrets is the dump. Hence makes a lot more sense to go Garret..Or did I miss something..

[jet2nv]

yeah that sounds good hahaha

HEY wolverine where to i get the dump pipes from it looks like they are a ford style 5 bolt

has anyone seen them cheaper anywhere delivered for $1480

[wolverine]

streettotrack might be worth contacting.