Jump to content
SAU Community

Recommended Posts

hmm sound intresting im looking at buying one but not quite sure wat the go is

As a first approximation Rpm to reach full boost is just about inversely proportional to a/r.

So if 0.84 = 5,200 Rpm

0.68 would be close to (0.68/0.84 x 5200) = 4,200 Rpm.

Of course exhaust back pressure will be a bit higher with the smaller housing, so it will make less power at the same boost, but it will probably not be that much slower on the road, and a hell of lot easier to drive.

Go back to where you bought the turbo, and ask them what they can get for you. There are a number of housings available, 0.7 single entry, or 0.68 split pulse may be about the right sort of numbers to ask for. These are the next step down from the 0.81 single entry and 0.84 split pulse that you already have.

Link to comment
https://www.sau.com.au/forums/topic/131666-to4z/page/2/#findComment-2446267
Share on other sites

Great result mate and nice turbo choice...!

has anyone lined up the HKS version and garrett version for performance and heat produced etc...on the same engine?

how would the .68 housing go on an RB26? ie what rmp would it come on at and what range of power figures could you expect?

Link to comment
https://www.sau.com.au/forums/topic/131666-to4z/page/2/#findComment-2451225
Share on other sites

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


  • Latest Posts

    • Steam valve seals are usually responsible for cold start smoke, it goes away once engine warmed up. Disconnect it let engine breathers and let it breath freely, see if problem goes away after a short drive. Also check to make sure engine oil drain pipe is not blocked or kinked. 
    • Haha thanks! Yea I'm moving over from 2x 1000cc jets pre throttle over to 6x 190cc direct port jets and 1x 500cc pre throttle jet.  Direct port comes with all the advantages you would expect, except that pre throttle does cool down IAT'S more. That's why my direct port nozzle placement is closest to the plenum as possible in the runners to allow the air more time to cool before being sucked in. I'm also putting that one 500cc pre throttle jet to help with more cooling. It's a hybrid system. There's a lot more advantages to moving over to a PWM solenoid with a constant pressure system vs my old PWM pump setup, but I'll get more into that once I'm done converting everything over. The ricer in me is excited to see SS tubing all over my manifold though!
    • Very cool, see what I did there? 馃ゲ Wild WMI setup, first I've seen where it's on each cylinder runner, usually I see a single jet pre throttle.
    • Welcome mate. What type of work were you looking at getting done? Majorly of decent skyline workshops are in the SE.
    • Thanks mate, haha that's it ey, no more boosters and what not, should make for a good time
  • Create New...