My Rb30 Build Plan -garrett Gt3540 1.06

[bigmikespec]

You make yourself look silly by making wild assumptions... sit back and wait for a result.

As for this thread; looking forward to seeing a result from this early in the new year!

[bradsm87]

I understand that I might look silly by arguing about silly things but..

The ONLY wild assumption around here is that the GTX3582R would be laggier than the GT3582R. It just doesn't make any sense, given the advantages of the wheel. That is a VERY wild assumption.

[SimonR32]

I understand that I might look silly by arguing about silly things but..

The ONLY wild assumption around here is that the GTX3582R would be laggier than the GT3582R. It just doesn't make any sense, given the advantages of the wheel. That is a VERY wild assumption.

No one has ever said that a GT35R would be laggier that a GTX... Hence you are a douche!

[bradsm87]

No one has ever said that a GT35R would be laggier that a GTX... Hence you are a douche!

That's not what I said. migmikespec is claiming the GTX is laggier than the same GT:

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!

I won't call u a douche for not seeing it tho

Edited December 22, 2010 by bradsm87

[zebra]

Take the first of the T88-38gk's they had a billet comp wheel, then they went to the cast wheel...any difference....maybe 100 on an Insane RB or JZ, real world...no difference

Borg Warner have been using billet comp wheels for yonks yet no-one has said they are any better than the previous ones

[bigmikespec]

SimonR32 is right; never said it was laggier... I just said it would be surprised if it responded the same at the same power. Is has a larger compressor wheel (shown in catalogue) and hence a higher moment of inertia.

You have no idea what the weight is so you should not comment... maybe it is the same weight or heavier? If that is the case and it responded the same, as I said I would be surprised.

[bradsm87]

SimonR32 is right; never said it was laggier... I just said it would be surprised if it responded the same at the same power. Is has a larger compressor wheel (shown in catalogue) and hence a higher moment of inertia.

You have no idea what the weight is so you should not comment... maybe it is the same weight or heavier? If that is the case and it responded the same, as I said I would be surprised.

Yeah but 0.5mm isn't gonna do shit. I wouldn't call that larger. I'd call that the same. Just like with GTR twins, a -9 comp wheel is 59.4mm and a -7 is 60mm. they're the same size. U don't call something 0.5mm bigger in turbo talk bigger. It's the same. There are so many other variables that make the 0.5mm in diameter insignificant.

[SimonR32]

That's not what I said. migmikespec is claiming the GTX is laggier than the same GT:

I won't call u a douche for not seeing it tho

LOL douche!

[bigmikespec]

Yeah; can only explain it so many times... Douche!

[bradsm87]

Cheers guys

[Char]

ok so the car is still in the shop........ but thought id throw up a few teasers

MANIFOLD ONE:

MANIFOLD TWO:

note that the first manifold sat too close to the strut tower so the turbo was fouling, and now the 2nd manifold is really close to the rocker cover.

also something to note is that both of the exhaust manifolds had to be modified ie grinded/cut on the bottom in sections by Ovaboost because an rb25 manifold will foul on the rb30 block!

you can also see that ovaboost have moved the tensioner to above the water pump

hopefully have dyno results soon!

Edited January 19, 2011 by Char

[JonnoHR31]

you can safely cut away the parts of the block that foul on the manifold

[SirRacer]

buy a better turbo manifold mate. those ones cause so many issues.

[Char]

spot on mate, ovaboost already had a go, telling me they only want to work with 6boost manifolds/steam pipe,

mostly its because i was impatient and a 6boost manifold would have taken another month + $1400

i had the 2nd manifold machined straight and had the welds/runners checked and modified if needed, but these manifolds are typical for overboosting

i will be getting a 6boobs manifold, likely after the engine has been run in -one to suit my T04Z plans

i rang the shop today, nothing new to report since the compression test, still waiting for some custom fab work. -also im not sure if they sussed a way to close the bonnet

[R32 Driver]

yea you can machine abit off the block so the manifold wont foul

even happens with rb26 stock manis

Looking good thou!

[Amoreuxi]

Build a package - every part is to suit another for the power goal.

RB30's are dime a dozzen.

Go the 87mm, why not, every little bit helps. Your only after 450rwhp.

555cc's - up the pressure slightly they will be fine.

Drop the rear down to a .86, there's no need for the 1.06 for 450rwhp especially considering your running 555cc's. It will only introduce more lag and you'll be depressed when something with less hp kicks your arse.

450rwhp - drop a .5 comp cover on it with the .86 rear, perfect match excellent mid range and some very nice response in first and second. Matching GT30 territory but with an additional 30-40rwkw.

Ford did a lot of testing with the .5 front cover, its a very nice match for a GT35R streeter on 98 pump looking for 350rwkw.

What about a clutch, 450rwhp+ will need a considerably better clutch than a good exedy single plate.

Consider the package, don't over do one area only to under do another.

Your running a plenum, be sure not to shove in a set of cams, it will rev want too hard and you will spiral in to the $ of ATI balancers and forged rods, if you don't you'll rev her too hard and whats that KNOCK KNOCK KNOCK, oh sh$#T, maybe thicker oil will fix it... no it won't.

In short.. Aim for 450rwhp don't over do it and it will be a cheapish package. Over 400-450rwhp and it starts getting expensive quickly. ATI balancer, high rpm, bigger injectors, cams, porting, more lag but more rev's, double/tripple place clutch then you start stripping gears in the ol' rb25 gearbox, then there's the traction issue that WILL present its self of which again will make you depressed as some one with considerably less HP WILL kick your arse... see where I'm heading.

EDIT: Shove some forward cradle rake in to it - it will make the world of difference to the way it hooks up.

Edited January 21, 2011 by Amoreuxi

[SirRacer]

If you cant get a 6boost contact Mike @ Sinco customs in New Zealand. With the strength of the Aussie dollar it would probably be cheaper + the quality is easily as good.

[waxracing]

Build a package - every part is to suit another for the power goal.

RB30's are dime a dozzen.

Go the 87mm, why not, every little bit helps. Your only after 450rwhp.

555cc's - up the pressure slightly they will be fine.

Drop the rear down to a .86, there's no need for the 1.06 for 450rwhp especially considering your running 555cc's. It will only introduce more lag and you'll be depressed when something with less hp kicks your arse.

450rwhp - drop a .5 comp cover on it with the .86 rear, perfect match excellent mid range and some very nice response in first and second. Matching GT30 territory but with an additional 30-40rwkw.

Ford did a lot of testing with the .5 front cover, its a very nice match for a GT35R streeter on 98 pump looking for 350rwkw.

What about a clutch, 450rwhp+ will need a considerably better clutch than a good exedy single plate.

Consider the package, don't over do one area only to under do another.

Your running a plenum, be sure not to shove in a set of cams, it will rev want too hard and you will spiral in to the $ of ATI balancers and forged rods, if you don't you'll rev her too hard and whats that KNOCK KNOCK KNOCK, oh sh$#T, maybe thicker oil will fix it... no it won't.

In short.. Aim for 450rwhp don't over do it and it will be a cheapish package. Over 400-450rwhp and it starts getting expensive quickly. ATI balancer, high rpm, bigger injectors, cams, porting, more lag but more rev's, double/tripple place clutch then you start stripping gears in the ol' rb25 gearbox, then there's the traction issue that WILL present its self of which again will make you depressed as some one with considerably less HP WILL kick your arse... see where I'm heading.

EDIT: Shove some forward cradle rake in to it - it will make the world of difference to the way it hooks up.

What a top post.

Great information

[mild r33]

Hey Char,

Any updates on your build?

[BMYHOE]

would love to know the results this got?

i got a GT35 T3 1.06 hanging off my RB30 on a engine stand still a few months for dyno etc..