Single Turbo Choice On My Rb26/30

[Daz]

Hi guys,

I’m looking at the single turbo route.

Setup is as a 26/30, 260 @ 9.15 poncams, 8.9:1 comp - Tickled head

Car is on pump E85 fuel

The car is a weekender, mostly driven on the street however I'm planning to do a few Snowy Mountain 1000m sprints.

I'd like somewhat decent response - do not want a lag monster

Looking for a power figure of around 600-700 KW; a few turbo’s have been narrowed down

1 – EFR 9180 with either a T4 split 1.05 or 1.45 AR rear. “94 lb/minute”

2 - GTX 4202R with a T4 split 1.01 or 1.15 AR rear. “110 ish lb/minute”

3 - GTX 4294R with a T4 split 1.01 or 1.15 AR rear. “95 ish lb/minute”

Can some of you turbo guru’s shine some light on the situation here. Also gate size would be nice too. Something around the 50mm in single form I’m guessing.

Thanks in advance

Darren

Edited September 9, 2015 by Daz

[iruvyouskyrine]

Can you give us an idea of what you call responsive? Because words like '700kw' and 'GTX42' don't usually get associated with it.

What fuel system are you running?

[QUP29]

How much boost are you planning to run?

[GTRPSI]

Daz, Daz, Daz.......700AwKw hey?

Similar to my current build.

One question you can put to the Bosnian (who im guessing will be doing all the work)

Will it handle it without Darton sleeves and without a partial grout fill reliably? You did partially grout fill the block at minimum?

In a nut shell your pushing the boundary of a reliable 26/30 with your current build, that does not mean it will fail, your just at the border.

Did you anti friction coat your piston skirts? Massive side loading's and cylinder pressures at those power levels.

Remember its not a 2JZ block or a N1 block either, if it was a 2JZ id say a very different story to what the bores can take.

700Kw and response? (Your joking right?)

We are going PT7675...but im not chasing response.

Maybe PT6870 at 650-700Kw on your current internals to keep costs down and reliability somewhat around.

BTW how much exhaust porting was done to your head? Were at least the humps removed? You will need a good flowing head on the exhaust side.

Me smells that he has corrupted you with a new drug called power addiction, tell him i said hes a big drug dealer and his customers are all becoming power Junkies, but i will add, all these engine builds and big power, so far no failures, maybe he sprinkles some magic fairy dust from Bosnia over his engines to make them last.

Edited September 9, 2015 by GTRPSI

[Stixbnr32]

There are a few 900hp Rb30's floating around that the owners seem to be happy with for street use.

This car called the "BORG" ran a TO4Z I think.

Oh wait that ran a hit of nos to get the response and smashed PPG Getrags....have fun

http://www.gtr.co.uk/forum/113131-rips-rebuilds-borg.html

[Daz]

Fuel system I'm running a Magnafuel 750, 5Lt surge tank, -10 lines through out, 2200cc injectors

Not sure on how much boost possibly 22-28psi up to tuner really

Motor has been partially grout filled

Yes head was ported, humps was removed

Ok I said 600-700kw however everyone is only seeing 700, I'd much rather have 600rwkw's and decent response then a 700rwkw's lag monster. So maybe the question is what is the best single turbo for a RB26/30 that will give me the best response however still fetch me around 600rwks or a little over?

[QUP29]

800hp with 28psi... With a responsive turbo.

2.8 stroker t88 30psi made 850hp - 630kw

I'm trying to chase the 630kw on 30psi

But I have a feeling I won't even get to it with my setup, I think ill be running abit more boost with my precision 6870

[GTRPSI]

Gate size and manifold.....we went twin 38mm which is larger than a single 50mm.....2268mm square area for twin 38 Vs 1963mm square area for a single 50mm gate.

Bah, Garrett, go get yourself a PT6870

[STATUS]

800hp with 28psi... With a responsive turbo.

2.8 stroker t88 30psi made 850hp - 630kw

I'm trying to chase the 630kw on 30psi

But I have a feeling I won't even get to it with my setup, I think ill be running abit more boost with my precision 6870

800hp with 28psi... With a responsive turbo.

2.8 stroker t88 30psi made 850hp - 630kw

I'm trying to chase the 630kw on 30psi

But I have a feeling I won't even get to it with my setup, I think ill be running abit more boost with my precision 6870

just bolt on the T88GK it will do 900-1100hp at the wheel no problem... on e85 expect way more.

[jangles]

6466 with a 1.0 rear housing will make a 600kw on 28psi, you'll have 300kw by 4000rpm

6870 is laggier, but I've seen them go over 700kw.

[GTRPSI]

just bolt on the T88GK it will do 900-1100hp at the wheel no problem... on e85 expect way more.

Trent, you play with different turbo setups on your dyno a lot and have immense practical know how in that area, Daz made it clear he wants to stay Garrett (and he mentioned BW to me), what would you recommend to him?

I can only suggest Precisions but he made it clear its a no go for him.....Garrett is really what hes after.

Hell if i wanted around 650Kw at all 4 with response id be using the PT6870 but he wont hear of it.

[jangles]

Trent, you play with different turbo setups on your dyno a lot and have immense practical know how in that area, Daz made it clear he wants to stay Garrett (and he mentioned BW to me), what would you recommend to him?

I can only suggest Precisions but he made it clear its a no go for him.....Garrett is really what hes after.

Hell if i wanted around 650Kw at all 4 with response id be using the PT6870 but he wont hear of it.

Well it's not clear when he doesn't say 'I only want a Garrett'

[Daz]

These new GTW turbo's seem interesting

http://gcg.com.au/turbos-kits/garrett-gtw-ball-bearing/garrett-gtw3884r/garrett-gtw3884r-67mm-turbocharger-t04-dual-entry-3713-3719-detail

[jangles]

These new GTW turbo's seem interesting

http://gcg.com.au/turbos-kits/garrett-gtw-ball-bearing/garrett-gtw3884r/garrett-gtw3884r-67mm-turbocharger-t04-dual-entry-3713-3719-detail

Put an AKA 6465 on so we can see what they compare like

[Daz]

Put an AKA 6465 on so we can see what they compare like

6765

[jangles]

6765

Only said 64 because in precision they are better than the 67 unless going all out

[Full-Race Geoff]

Daz, i suggest taking a look at the single EFR or twin EFR6258s. since response is an important part of this build, that is an area which the EFR clearly has the advantage with.

[GTRPSI]

Daz, give me a buzz when you have time to discuss your manifold. (if you have not purchased it yet)

Or talk to the guy above me if you need one, if id known half what i saw late this week i would have grabbed a full race manifold from Geoff.

I only hope i don't have the issues with my 6boost that ive heard first hand from a few people that have visited me this week of what they went through, they were 2 separate cases, both the same over boost issues......one returned for a refund after spending a packet on dynos following 6boosts advice trying to fix a crappy wastegate port fitment design, both sorted by changing to another brand of manifold.

In their cases they were single gate designs, i hope my twin gate wont suffer from the same.......

[Daz]

Thanks Peter will call you later today and will get in contact with Geoff also.

[Daz]

The only gtw3884r results I could find on the net. Curve looks good imo although on a 4lt and cant really read how good the response is without rpm well I can't.

Any thoughts?