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

    • Hi, is the HKS  Tower Bar still available ? negotiable ? 🤔
    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
    • Onto the android unit. You need to remove the top screen because there is a daughterboard to put inside the case. Each side vent pops out from clips; start at the bottom and carefully remove upwards (use a trim remover tool to avoid breaking anything). Then the lower screen and controls come out, 4 screws, a couple of clips (including 3 flimsy ones at the top) and 3 plugs on the rear. Then the upper screen, 4 screws and a bunch of plugs and she is out. From there, remove the mounting brackets (2 screws each), 4 screws on the rear, 2 screws top and bottom and 3 screws holding in the small plates on each side. When you remove the back cover (tight fit), watch out for the power cable for the fan, I removed it so I could put the back aside. The mainboard is held in by 1 screw in the middle, 1 aerial at the top and 3 ribbon cables. If you've ever done any laptop stuff the ribbon cables are OK to work with, just pop up the retainer and they slide out. If you are not familiar just grab a 12 year old from an iphone factory, they will know how it works The case should now look like this:
    • Switching the console was tricky. First there were 6 screws to remove, and also the little adapter loom and its screws had to come out. Also don't forget to remove the 2 screws holding the central locking receiver. Then there are 4 clips on either side....these were very tight in this case and needed careful persuading with a long flat screw driver....some force required but not enough to break them...this was probably the fiddliest part of the whole job. In my case I needed both the wiring loom and the central locking receiver module to swap across to the new one. That was it for the console, so "assembly is the reverse of disassembly"
×
×
  • Create New...