Jump to content
SAU Community

Recommended Posts

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 by Daz
Link to comment
https://www.sau.com.au/forums/topic/459582-single-turbo-choice-on-my-rb2630/
Share on other sites

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 by GTRPSI
  • Like 1

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

  • Like 1

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?

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

  • Like 1

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.

M03vjx.jpg

7GpOLh.jpg

Bah, Garrett, go get yourself a PT6870 :nyaanyaa:

  • Like 2

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.

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.

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, 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.......

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...