My Rb30 Build Plan -garrett Gt3540 1.06

[bradsm87]

The 38mm gate wouldn't flow enough to control boost on a 25/30 with a GT3582R.

Also, I know you probably already have the GT3582R but Garrett now have the GTX series so U could get a GTX3076R 0.82 and it'd smash a GT3582R for response and still make enough power to max out 555cc injectors.

Looks like u'r running stock RB25 cams. I'd be running a GTX3076R .82 with that setup or if u want more power, get bigger cams, bigger injectors and run a GTX3076R 1.06.

GT35 is too big for a setup with stock RB25 cams IMO.

[SirRacer]

The 38mm gate wouldn't flow enough to control boost on a 25/30 with a GT3582R.

Also, I know you probably already have the GT3582R but Garrett now have the GTX series so U could get a GTX3076R 0.82 and it'd smash a GT3582R for response and still make enough power to max out 555cc injectors.

Looks like u'r running stock RB25 cams. I'd be running a GTX3076R .82 with that setup or if u want more power, get bigger cams, bigger injectors and run a GTX3076R 1.06.

GT35 is too big for a setup with stock RB25 cams IMO.

You obviously dont have much or any experience with rb30's then do you, which is half the problem with formus. A gt3540 runs fine with stock cams and isnt too laggy. Sure a nice set of 272's would be great, but not everyone has the extra cash to splash out on them. In my opinion (i have this setup) both a .82 and 1.06 housing are fine on an rb30.

[bradsm87]

Yes it will work with stock cams but it's FAR from an ideal setup. U may as well match everything properly because u'll end up with better response, better power or both if U do.

A GTX3076R .82 would work very well with stock cams, be an absolute ANIMAL low in the revs still and max out 555cc injectors. Why go bigger if U can't make any more power out of the injectors?

Also a GTX3076R 1.06 with 260 cams would kill a GT3582R .82 without cams for both response and power.

Edited December 8, 2010 by bradsm87

[TiTAN]

i have a 0.82 35R and stock cams, ~20psi @ just after 3500. bigger cam setups dont get much better response.

[bradsm87]

Yep it'd work OK BUT a GTX3076R 1.06 with cams would be quicker on to boost, kick harder and make more power than a GT3582R .82 with stock cams.

Edited December 8, 2010 by bradsm87

[SirRacer]

Yep it'd work OK BUT a GTX3076R 1.06 with cams would be quicker on to boost, kick harder and make more power than a GT3582R .82 with stock cams.

And cost how much more? Poor blokes no doubt on a budget.

With my setup id love to get a ported gtr head with 280's and a gt4088 with custom twin scroll manifold. Unfortunately i cant afford this (or want to do other shit with my money) so dont.

[bradsm87]

that's fine. if budget doesn't allow cams, what i'm trying to say is get the turbo to suit. GTX3076R .82 will work best with stock cams and still max out the injectors!

[Char]

cheers for the info i'll take it into consideration for future but atm not keen to spend anymore as i've already spent alot more than i planned to and its not even on the road yet

its funny you mention cams as before my old motor let go i sold off some brand new poncams for about $550! but they are barely bigger than stock anyway.

it now has 1000cc injectors with a billet fuel rail, and turbosmart 800 fpr

im keen to see what power/torque figures are like in its current state, how it will handle/drive before i consider changing things, if i decide on a different turbo it will be getting TO4Z -and also surge tank + another 044.

i rang ovaboost yesterday and they said it wont be back to me until early 2011

compression test turned up 160 on all 6

[zebra]

The GTX turbos have only just been released, there are NO results for RBs anywhere, so anyone saying they will smash blah blah turbo for response and power is simple talking through their ass, until it is proven multipul times on RB's then nobody can say they will be better.

[bradsm87]

cheers for the info i'll take it into consideration for future but atm not keen to spend anymore as i've already spent alot more than i planned to and its not even on the road yet

its funny you mention cams as before my old motor let go i sold off some brand new poncams for about $550! but they are barely bigger than stock anyway.

it now has 1000cc injectors with a billet fuel rail, and turbosmart 800 fpr

im keen to see what power/torque figures are like in its current state, how it will handle/drive before i consider changing things, if i decide on a different turbo it will be getting TO4Z -and also surge tank + another 044.

i rang ovaboost yesterday and they said it wont be back to me until early 2011

compression test turned up 160 on all 6

Oh man T04Z's are so shit these days but ppl keep buying them because it's such a long recognised turbo. A GTX3582R will smash it for response AND power hands down. It's like a 1995 turbo vs a 2010 turbo. The T04Z should be discontinued except for rebuild parts but ppl keep buying it because they've heard of it.

Edited December 18, 2010 by bradsm87

[bradsm87]

The GTX turbos have only just been released, there are NO results for RBs anywhere, so anyone saying they will smash blah blah turbo for response and power is simple talking through their ass, until it is proven multipul times on RB's then nobody can say they will be better.

It's physics mate. It MUST be better. Things move SO slowly in this industry because ppl have that attitude. The stronger forged aluminium can be made thinner. Thinner hub, thinner blades. More room for air. Less disruption of the air. They are better 100% unless someone figured out how to bend the rules of the universe. Also a compressor map is like a dyno sheet. U run 2 cars on the same dyno and one makes more power. That car has more power!

[zebra]

It's physics mate. It MUST be better. Things move SO slowly in this industry because ppl have that attitude. The stronger forged aluminium can be made thinner. Thinner hub, thinner blades. More room for air. Less disruption of the air. They are better 100% unless someone figured out how to bend the rules of the universe. Also a compressor map is like a dyno sheet. U run 2 cars on the same dyno and one makes more power. That car has more power!

Things also move slowly because so many people talk up products that have yet to be tested, then the "real" data comes out and people rubbish them because they didnt perform as well as what some guys on the internet say they should

sure the compressor map shows it will make more power, but simply saying the GTX blah blah WILL make more power than a Blah Blah is simply rubbish, they are only going to be slightly better and most of that will come from running a 58 trim comp wheel.

So until I see a few results back to back (and by that I mean run gt35R on dyno, take turbo off on the dyno and strap the GTX35R on and run on the dyno with nothing other than tuning changed), I will continue to be skeptical

[waxracing]

I have just bought a s200sx turbo for my rb30/26

I want the thing on boost at idle haha well maybe not but you get the idea.

Have a look at the borg warner air werks range as well

[bigmikespec]

It's physics mate. It MUST be better. Things move SO slowly in this industry because ppl have that attitude. The stronger forged aluminium can be made thinner. Thinner hub, thinner blades. More room for air. Less disruption of the air. They are better 100% unless someone figured out how to bend the rules of the universe. Also a compressor map is like a dyno sheet. U run 2 cars on the same dyno and one makes more power. That car has more power!

You must still be a student and have not been out in the "real world" if you believe everything on a data sheet, come on now!

I will raise both eyebrows if a physically bigger comp. wheel (from a GTX35) will respond the same as a standard GT35 at the same power.

I am with the striped horse!

[bradsm87]

You must still be a student and have not been out in the "real world" if you believe everything on a data sheet, come on now!

I will raise both eyebrows if a physically bigger comp. wheel (from a GTX35) will respond the same as a standard GT35 at the same power.

I am with the striped horse!

HAHA it's 0.5mm bigger at the bottom and 1.1mm bigger at the top which is NOTHING but the blades are thinner and the hub in the centre is WAY thinner like prob a good 5mm thinner. Why the hell would that not respond the same?

[SimonR32]

bradsm87, I say this only out of love...

While you do bring up some valid points you also talk a lot of shit, maybe shoosh for a while and you might learn!

[bigmikespec]

HAHA it's 0.5mm bigger at the bottom and 1.1mm bigger at the top which is NOTHING but the blades are thinner and the hub in the centre is WAY thinner like prob a good 5mm thinner. Why the hell would that not respond the same?

Yes... now I know you are a student!

[bradsm87]

Yes... now I know you are a student!

WTF i'm an IT technicial lol. When did I ever clain to be a mechanical engineer?

Yep i get it that weight near the inside means shit all but it still means a BIT. I know enough to know that 0.5mm outer diameter is FARK ALL when you consider the weight savings of thinner forged blades compared to big fat cast blades.

Back to wheels as in wheels for the car. What do you think would be lighter, a 17x9" cast wheel or a 17.05x9" forged wheel??? The 0.05in will make FARK ALL difference.

I can't believe ur for real!!!

Edited December 22, 2010 by bradsm87

[bradsm87]

Also the extra blade area means the turbo flows more for the same shaft speed. More air, same shaft speed to to hit a particular level of boost on the same engine at the same revs, less shaft speed required. All that and U think it won't have the SAME response due to the extra 0.5mm outer diameter? LMFAO!

[SimonR32]

WTF i'm an IT technicial lol. When did I ever clain to be a mechanical engineer?

Yep i get it that weight near the inside means shit all but it still means a BIT. I know enough to know that 0.5mm outer diameter is FARK ALL when you consider the weight savings of thinner forged blades compared to big fat cast blades.

Back to wheels as in wheels for the car. What do you think would be lighter, a 17x9" cast wheel or a 17.05x9" forged wheel??? The 0.05in will make FARK ALL difference.

I can't believe ur for real!!!

Also the extra blade area means the turbo flows more for the same shaft speed. More air, same shaft speed to to hit a particular level of boost on the same engine at the same revs, less shaft speed required. All that and U think it won't have the SAME response due to the extra 0.5mm outer diameter? LMFAO!

bradsm87, I say this only out of love...

While you do bring up some valid points you also talk a lot of shit, maybe shoosh for a while and you might learn!